Summary of the invention
The present invention determines the actual attenuation value of vision signal according to the characteristic value of the vision signal received, according to actually decliningDepreciation determines the capacitor's capacity and resistance of equalizer feedback circuit；It is dynamically determined pair according to the actual attenuation value of vision signalThe offset that vision signal compensates is realized and is mended automatically according to the actual transmissions environment of vision signal to vision signalIt repays, ensure that the stability for the vision signal that receiving end receives.
The present invention provides a kind of methods for realizing vision signal equilibrium, this method comprises:
Controller receives vision signal, is believed according to preset vision signal initial characteristic values with the video receivedNumber characteristic value determine the actual attenuation value of vision signal；
The controller determines the equalizer feedback electricity of the vision signal according to the actual attenuation value of the vision signalThe resistance and capacitor's capacity on road, and notify the equalizer feedback circuit of vision signal according to the resistance of the determination andCapacitor's capacity compensates vision signal, realizes the equilibrium to the vision signal received.
Controller determines the actual attenuation of vision signal according to the characteristic value of the vision signal received in above-described embodimentValue, the capacitor's capacity and resistance of equalizer feedback circuit are determined according to actual attenuation value；According to actually declining for vision signalDepreciation is dynamically determined the offset compensated to vision signal, realizes the actual transmissions environment according to vision signal to videoSignal is compensated automatically, ensure that the stability for the vision signal that receiving end receives.
According to preset vision signal initial characteristic values and the vision signal received described in the embodiment of the present inventionCharacteristic value determine the actual attenuation value of vision signal, specifically include:
The vision signal is divided at least two video signal components；
For a video signal components, the controller is according to the initial characteristics of the preset video signal componentsThe actual characteristic value of the video signal components for being worth and receiving, determines the actual attenuation value of the video signal components；
The controller determines the actual attenuation value of each video signal components respectively.
Controller is according to the initial characteristic values of preset video signal components and the view received in above-described embodimentThe actual characteristic value of frequency signal component determines the actual attenuation value of each video signal components, by being dynamically determined video respectivelyThe actual attenuation value of signal component, in order to be dynamically determined corresponding offset.
Controller described in the embodiment of the present invention determines the vision signal according to the actual attenuation value of the vision signalThe resistance and capacitor's capacity of equalizer feedback circuit, specifically include:
The controller determines that corresponding video signal components are mended according to the actual attenuation value of each video signal componentsRepay value, each video signal components offset include the corresponding equalizer feedback circuit of the video signal components resistance andCapacitor's capacity.
Controller determines each vision signal point according to the actual attenuation value of each video signal components in above-described embodimentCorresponding offset is measured, realizes and vision signal is compensated according to the actual transmissions environment of vision signal；And pass through viewThe Multilevel compensating of frequency signal realizes the equilibrium of vision signal, ensure that the stability for the vision signal that receiving end receives.
Controller described in the embodiment of the present invention determines the vision signal according to the actual attenuation value of the vision signalResistance and capacitor's capacity, specifically include:
The ratio of the pad value of video signal components and pair of video signal components offset is stored in advance in the controllerIt should be related to, the controller determines corresponding vision signal point according to the ratio of the actual attenuation value of each video signal componentsMeasure offset.
The ratio Yu video signal components of the actual attenuation value of the preparatory video signal components of controller are mended in above-described embodimentThe corresponding relationship for repaying value reaches channel according to pad value determination after controller determines the pad value of each video signal componentsThe video signal components offset of matches criteria reduces controller to the adjustment number of signal compensation.
Controller described in the embodiment of the present invention determines the vision signal according to the actual attenuation value of the vision signalThe resistance and capacitor's capacity of equalizer feedback circuit, specifically include:
The class of attenuation of video signal components and the corresponding relationship of actual attenuation value, and view is stored in advance in the controllerThe class of attenuation of frequency signal component and the corresponding relationship of video signal components offset；The controller is according to determining each viewThe actual attenuation value of frequency signal component determines the corresponding class of attenuation of the video signal components, according to determining each vision signalThe class of attenuation of component determines that corresponding video signal components offset, the video signal components offset include video letterThe resistance and capacitor's capacity of number corresponding equalizer feedback circuit of component.
The class of attenuation of video signal components and the decaying of video signal components is stored in advance in controller in above-described embodimentThe corresponding relationship of the corresponding relationship of value and the class of attenuation of video signal components and video signal components offset, works as controlAfter device determines the class of attenuation of each video signal components, the corresponding decaying of the video signal components is determined according to the class of attenuationValue makes controller reach the requirement of signal transmission by the compensation of the smallest video signal components.
Controller described in the embodiment of the present invention notifies video signal equalizer feed circuit according to the resistance of the determinationAfter resistance value and capacitor's capacity compensate vision signal, further includes:
The controller determines whether the characteristic value of the vision signal after compensation deals is greater than preset vision signalCharacteristic threshold value returns to controller according to the actual attenuation value of vision signal and determines that the offset of vision signal walks if being not more thanSuddenly.
Whether meet the vision signal threshold of setting in above-described embodiment by detecting the characteristic value of compensated vision signalValue, if being unsatisfactory for requiring, continues to carry out compensated video signal value to determine whether the offset of vision signal meets the requirementsAdjustment is realized and is adjusted to the dynamic of the offset of vision signal.
The embodiment of the invention provides a kind of device for realizing vision signal equilibrium, which includes:
Signal resolution module, for receiving vision signal, according to preset vision signal initial characteristic values with connectThe characteristic value of the vision signal received determines the actual attenuation value of vision signal；
Signal equalization module determines the balanced device of the vision signal for the actual attenuation value according to the vision signalThe resistance and capacitor's capacity of feed circuit, and notify the equalizer feedback circuit of vision signal according to the resistance of the determinationResistance value and capacitor's capacity compensate vision signal, realize the equilibrium to the vision signal received.
Controller determines the actual attenuation of vision signal according to the characteristic value of the vision signal received in above-described embodimentValue, the capacitor's capacity and resistance of vision signal are determined according to actual attenuation value；It is dynamic according to the actual attenuation value of vision signalState determines the offset that compensates to vision signal, realize according to the actual transmissions environment of vision signal to vision signal intoRow compensation, ensure that the stability for the vision signal that receiving end receives.
Signal resolution module described in the embodiment of the present invention is specifically used for:
The vision signal is divided at least two video signal components；For a video signal components, according to pre-The actual characteristic value of the initial characteristic values of the video signal components first set and the video signal components received, determining shouldThe actual attenuation value of video signal components；The actual attenuation value of each video signal components is determined respectively.
Controller is according to according to the initial characteristic values of preset video signal components and receiving in above-described embodimentVideo signal components actual characteristic value, the actual attenuation value of each video signal components is determined respectively, by being dynamically determinedThe actual attenuation value of video signal components, in order to be dynamically determined corresponding offset.
Signal equalization module described in the embodiment of the present invention is specifically used for:
Corresponding video signal components offset, each view are determined according to the actual attenuation value of each video signal componentsFrequency signal component offset includes the resistance and capacitor's capacity of the corresponding equalizer feedback circuit of the video signal components.
Controller determines each vision signal point according to the actual attenuation value of each video signal components in above-described embodimentCorresponding offset is measured, realizes and vision signal is compensated according to the actual transmissions environment of vision signal；And pass through viewThe Multilevel compensating of frequency signal realizes the equilibrium of vision signal, ensure that the stability for the vision signal that receiving end receives.
Signal equalization module described in the embodiment of the present invention is specifically used for:
The ratio of the pad value of video signal components and the corresponding relationship of video signal components offset is stored in advance, according toThe ratio of the actual attenuation value of each video signal components determines corresponding video signal components offset.
The ratio Yu video signal components of the actual attenuation value of the preparatory video signal components of controller are mended in above-described embodimentThe corresponding relationship for repaying value reaches channel according to pad value determination after controller determines the pad value of each video signal componentsThe video signal components offset of matches criteria reduces controller to the adjustment number of signal compensation.
Signal equalization module described in the embodiment of the present invention is specifically used for:
The class of attenuation of video signal components and the corresponding relationship and video signal components of actual attenuation value is stored in advanceThe class of attenuation and video signal components offset corresponding relationship；According to the actual attenuation of determining each video signal componentsIt is worth and determines the corresponding class of attenuation of the video signal components, according to determining pair of the class of attenuation of determining each video signal componentsThe video signal components offset answered, the video signal components offset include that the corresponding balanced device of the video signal components is anti-The resistance and capacitor's capacity of current feed circuit.
The class of attenuation of video signal components and the decaying of video signal components is stored in advance in controller in above-described embodimentThe corresponding relationship of the corresponding relationship of value and the class of attenuation of video signal components and video signal components offset, works as controlAfter device determines the class of attenuation of each video signal components, the corresponding decaying of the video signal components is determined according to the class of attenuationValue makes controller reach the requirement of signal transmission by the compensation of the smallest video signal components.
Signal equalization module described in the embodiment of the present invention is also used to:
Notify video signal equalizer feed circuit according to the resistance and capacitor's capacity of the determination to vision signalAfter compensating, whether the characteristic value of the vision signal after determining compensation deals is greater than preset video signal properties thresholdValue, if being not more than, notification signal analysis module determines the offset of vision signal according to the actual attenuation value of vision signal.
Whether meet the vision signal threshold of setting in above-described embodiment by detecting the characteristic value of compensated vision signalValue, if being unsatisfactory for requiring, continues to carry out compensated video signal value to determine whether the offset of vision signal meets the requirementsAdjustment is realized and is adjusted to the dynamic of the offset of vision signal.
Specific embodiment
The actual attenuation value of vision signal, root are determined in the embodiment of the present invention according to the characteristic value of the vision signal receivedFactually border pad value determines the capacitor's capacity and resistance of vision signal；It is dynamically determined according to the actual attenuation value of vision signalTo the offset that vision signal compensates, realizes and vision signal is mended according to the actual transmissions environment of vision signalIt repays, ensure that the stability for the vision signal that receiving end receives.
The embodiment of the present invention is further described with reference to the accompanying drawings of the specification.
As shown in Figure 1, for a kind of method for realizing vision signal equilibrium in the embodiment of the present invention, this method comprises:
Step 101: controller receives vision signal, according to preset vision signal initial characteristic values with receiveThe characteristic value of vision signal determine the actual attenuation value of vision signal；
Step 102: controller determines the equalizer feedback circuit of vision signal according to the actual attenuation value of vision signalResistance and capacitor's capacity, and notify the equalizer feedback circuit of vision signal according to determining resistance and capacitor's capacityVision signal is compensated, realizes the equilibrium to the vision signal received.
Wherein in step 101, according to the spy of preset vision signal initial characteristic values and the vision signal receivedValue indicative determines the actual attenuation value of vision signal, specifically includes: controller and vision signal transmitting terminal are made an appointment vision signalThe initial characteristic values of transmitting after controller receives vision signal, are determined since vision signal decays in transmission processCharacteristic value after the video attenuation received believes the initial characteristic values of the low-frequency signal components and the video receivedNumber characteristic value actual attenuation value of the difference as the vision signal.
Vision signal is divided at least two video signal components；After controller receives vision signal, can first byVision signal is parsed, and multiple video signal components are resolved to；For a video signal components, controller according to setting in advanceThe actual characteristic value of the initial characteristic values of the fixed video signal components and the video signal components received, determines the videoThe actual attenuation value of signal component；Controller determines the actual attenuation value of each video signal components respectively.
Controller and vision signal transmitting terminal are made an appointment the initial spy of each video signal components transmitting in vision signalEach of value indicative, since vision signal decays in transmission process, after controller receives vision signal, determination receivesCharacteristic value after video signal components decaying, the initial characteristic values of each video signal components and the video signal components are decayedActual attenuation value of the difference of actual characteristic value afterwards as the video signal components.Vision signal is divided into two video lettersNumber component, i.e., for high frequency component signal and low-frequency signal components, after controller receives vision signal, can first believe videoIt number is parsed, is parsed into high frequency component signal and low-frequency signal components, then controller is according to the high-frequency signal after parsing pointThe actual characteristic value of amount and the initial characteristic values of preset high frequency component signal determine the actual attenuation of high frequency component signalValue, determines low according to the initial characteristic values of the characteristic value of the low-frequency signal components after parsing and preset low-frequency signal componentsThe actual attenuation value of frequency signal component.As shown in Fig. 2, for vision signal is resolved to high frequency component signal and low-frequency signal componentsSchematic diagram afterwards, wherein 201 parts are the synchronous head signal of the vision signal received, arrow height indicates same in 201 partsThe characteristic value of head signal is walked, that is, the characteristic value in the vision signal received after low-frequency signal components decaying, 202 parts are to receiveThe color carrier signal of the vision signal arrived, arrow height indicates the characteristic value of color carrier in 202 parts, that is, the video letter receivedCharacteristic value after the decaying of number high frequency signal component.
In step 102, controller determines the resistance and capacitor of vision signal according to the actual attenuation value of vision signalThe method of capacitance includes but is not limited to following several method, is introduced separately below:
Method one,
For a video signal components, the class of attenuation and actual attenuation value of video signal components is stored in advance in controllerCorresponding relationship and video signal components the class of attenuation and video signal components offset corresponding relationship；Controller rootThe corresponding class of attenuation of the video signal components is determined according to the actual attenuation value of determining each video signal components, according to determinationThe classes of attenuation of each video signal components determine corresponding video signal components offset；Controller determines each view respectivelyThe actual attenuation value of frequency signal component, and closed according to the class of attenuation of each video signal components is corresponding with actual attenuation valueThe corresponding relationship of the class of attenuation and video signal components offset of system and the video signal components, determines each view respectivelyFrequency signal component offset；Video signal components offset includes the electricity of the corresponding equalizer feedback circuit of the video signal componentsHinder resistance value and capacitor's capacity.Vision signal is divided into two components, i.e., for high frequency component signal and low-frequency signal components,High frequency component signal pad value is divided into 5 grades, the corresponding pad value range of each grade, such as high frequency component signalThe corresponding pad value x of first class of attenuation is 0 < x≤8dB, and the corresponding pad value of second class of attenuation is 8dB < x≤16dB, theThe corresponding pad value of three classes of attenuation is 16dB < x≤24dB, and the corresponding pad value of the 4th class of attenuation is 24dB < x≤32dB,The corresponding pad value of 5th class of attenuation is x > 32dB.Each class of attenuation corresponding one fixed high frequency component signal compensationValue；Low-frequency signal components pad value is divided into 5 grades, the corresponding pad value range of each grade, such as the first low frequency is believedNumber corresponding pad value x of the component class of attenuation is 0 < x≤5dB, and the corresponding pad value of the second low-frequency signal components class of attenuation is5dB < x≤10dB, the corresponding pad value of the third low-frequency signal components class of attenuation are 10dB < x≤15dB, the 4th low frequency signal pointMeasuring the corresponding pad value of the class of attenuation is 15dB<x≤20dB, the corresponding pad value of the 5th low-frequency signal components class of attenuation be x>20dB.The corresponding fixed low-frequency signal components offset of each class of attenuation.
When vision signal is divided into multiple components, for a video signal components, according to the video signal componentsRange of characteristic values divides the corresponding class of attenuation, and controller is respectively that each video signal components divides corresponding decaying etc.Grade, the class of attenuation quantity of each video signal components can be identical, can not also be identical.Wherein each video signal components are mendedRepay the resistance and capacitor's capacity that value is the corresponding equalizer feedback circuit of the video signal components.
After determining each video signal components offset using the above method, controller passes through each video signal componentsAfter corresponding equalizer feedback circuit respectively compensates video signal components, controller is to each video after equilibrium treatmentSignal component is analyzed again, and whether the characteristic value of each video signal components after judging equilibrium treatment is greater than each videoThe characteristic threshold value of the corresponding setting of signal component, if more than then terminating this process, if being not more than, returning and determine the vision signalThe step of component pad value.
Method two,
The pad value pass corresponding with the video signal components offset of each video signal components is stored in advance in controllerSystem；Controller is using the difference of the actual characteristic value of the initial characteristic values of video signal components and video signal components as vision signalThe actual attenuation value of component, controller is according to the actual attenuation value of determining video signal components and declining for video signal componentsThe corresponding relationship of depreciation and the video signal components offset determines the video signal components offset.Each vision signal pointAmount offset includes the resistance and capacitor's capacity of the corresponding equalizer feedback circuit of the video signal components.
After determining each video signal components offset using the above method, controller passes through each video signal componentsAfter corresponding equalizer feedback circuit respectively compensates video signal components, controller is to each video after equilibrium treatmentSignal component is analyzed again, and whether the characteristic value of each video signal components after judging equilibrium treatment is greater than each videoThe characteristic threshold value of the corresponding setting of signal component, if more than then terminating this process, if being not more than, returning and determine the vision signalThe step of component pad value.
Method three,
After vision signal is divided into multiple video signal components, controller is according to the preset view of video signal componentsThe actual characteristic value of frequency signal initial characteristic values and video signal components, determines actually declining for each video signal components respectivelyDepreciation calculates separately the corresponding video signal components of each video signal components according to the actual attenuation value of each vision signal and mendsValue is repaid, and the equalizer feedback circuit of corresponding video signal components is notified to carry out according to determining video signal components offsetVideo signal components compensation.
After determining each video signal components offset using the above method, controller passes through each video signal componentsAfter corresponding equalizer feedback circuit respectively compensates video signal components, controller is to each video after equilibrium treatmentSignal component is analyzed again, and whether the characteristic value of each video signal components after judging equilibrium treatment is greater than each videoThe characteristic threshold value of the corresponding setting of signal component, if more than then terminating this process, if being not more than, returning and determine the vision signalThe step of component pad value.
Method four,
The ratio pass corresponding with video signal components offset of the pad value of video signal components is stored in advance in controllerSystem, controller determine corresponding video signal components offset according to the ratio of the actual attenuation value of video signal components.
Vision signal is divided into two components, i.e., for high frequency component signal and low-frequency signal components, controller is pre-First store the ratio of high frequency component signal actual attenuation value and low-frequency signal components actual attenuation value and the benefit of high frequency component signalRepay the corresponding relationship of the offset of value and low-frequency signal components, controller according to determining high frequency component signal actual attenuation value andThe ratio of low-frequency signal components actual attenuation value, determines the offset of corresponding high frequency component signal and the benefit of low-frequency signal componentsRepay value.The wherein corresponding high frequency letter of the ratio of each high frequency component signal actual attenuation value and low-frequency signal components actual attenuation valueNumber offset of component and the offset of low-frequency signal components are the data obtained by many experiments or actual test.
After determining each video signal components offset using the above method, controller passes through each video signal componentsAfter corresponding equalizer feedback circuit respectively compensates video signal components, controller is to each video after equilibrium treatmentSignal component is analyzed again, and whether the characteristic value of each video signal components after judging equilibrium treatment is greater than each videoThe characteristic threshold value of the corresponding setting of signal component, if more than then terminating this process, if being not more than, returning and determine the vision signalThe step of component pad value.
The equalizer feedback circuit of video signal components by adjust equalizer feedback circuit in resistance resistance value andThe capacitance of capacitor compensates the bandwidth and intensity of the video signal components after decaying, makes compensated vision signal pointAmount can transmit sufficiently long range in the transmission line of vision signal.
In above-described embodiment by taking vision signal is divided into two video signal components as an example, when video signal components are dividedWhen for three or three or more video signal components, implementation method is similar therewith, and details are not described herein.
As shown in figure 3, for the method that the first in the embodiment of the present invention realizes vision signal equilibrium, this method comprises:
Step 301: controller receives vision signal, determines the characteristic value of the vision signal received；
Step 302: controller is according to the initial characteristic values of preset vision signal and the vision signal that receivesCharacteristic value determines the actual attenuation value of vision signal；
Step 303: the class of attenuation of controller vision signal according to the pre-stored data and the corresponding relationship of actual attenuation value,Determine that the actual attenuation value of vision signal determines the class of attenuation of corresponding vision signal；
Step 304: the corresponding relationship of the controller class of attenuation according to the pre-stored data and resistance and capacitor's capacity, reallyThe class of attenuation of fixed vision signal determines corresponding resistance and capacitor's capacity；
Step 305: controller notifies video signal equalizer feed circuit according to the electricity of determining equalizer feedback circuitResistance resistance value and capacitor's capacity compensate vision signal；
Step 306: controller judges whether the characteristic value of the vision signal after compensation deals meets the vision signal of settingCharacteristic threshold value, if meet if terminate this process, it is no to then follow the steps 307
Step 307: controller increases separately setting step-length, and return step to determining resistance and capacitor's capacity305。
In above-described embodiment, with pair of the class of attenuation of controller vision signal according to the pre-stored data and actual attenuation valueIt should be related to and the pre-stored class of attenuation with the resistance of equalizer feedback circuit and the corresponding relationship of capacitor's capacity isExample, determines the resistance and capacitor's capacity of compensated video signal, can also be stored in advance by controller in above-described embodimentThe actual attenuation value of vision signal and the corresponding relationship of capacitor's capacity and resistance, determine the corresponding capacitor's capacity of vision signalAnd resistance；Or actual attenuation value and preset vision signal initial characteristic values by vision signal, it calculatesTo the capacitor's capacity and resistance of vision signal, other embodiments are similar to the above embodiments, and details are not described herein.
As shown in figure 4, for vision signal is divided into two components in the embodiment of the present invention, i.e. high frequency component signal and lowThe method of second of realization vision signal equilibrium for frequency signal component, this method comprises:
Step 401: controller receives vision signal, the feature after determining the high frequency component signal decaying in vision signalValue；
Step 402: controller is according to the initial characteristic values of preset high frequency component signal and the high-frequency signal of determinationCharacteristic value after component decaying, determines the actual attenuation value of high frequency component signal；
Step 403: controller is determined according to the corresponding relationship that high frequency component signal pad value and the class of attenuation is stored in advanceThe corresponding class of attenuation of the high frequency component signal；
Step 404: controller is according to pair of the determining class of attenuation and the class of attenuation and resistance and capacitor's capacityIt should be related to, determine the resistance and capacitor's capacity of the corresponding equalizer feedback circuit of the high frequency component signal；
Step 405: controller notifies high frequency component signal equalizer feedback circuit according to determining resistance and capacitorCapacitance compensates the high frequency component signal in vision signal；
Step 406: controller judges whether the characteristic value of the high frequency component signal after compensation deals is greater than the high frequency of settingSignal component characteristic threshold value, if more than thening follow the steps 407, otherwise return step 401；
Step 407: controller receives vision signal, the feature after determining the low-frequency signal components decaying in vision signalValue；
Step 408: controller is according to the initial characteristic values of preset low-frequency signal components and the low frequency signal of determinationCharacteristic value after component decaying, determines the actual attenuation value of low-frequency signal components；
Step 409: controller is determined according to the corresponding relationship that low-frequency signal components pad value and the class of attenuation is stored in advanceThe corresponding class of attenuation of the low-frequency signal components；
Step 410: controller is according to pair of the determining class of attenuation and the class of attenuation and resistance and capacitor's capacityIt should be related to, determine the corresponding equalizer feedback circuitous resistance resistance value of the low-frequency signal components and capacitor's capacity；
Step 411: controller notifies low-frequency signal components equalizer feedback circuit according to determining resistance and capacitorCapacitance compensates the low-frequency signal components in vision signal；
Step 412: controller judges whether the characteristic value of the low-frequency signal components after compensation deals is greater than the low frequency of settingSignal component characteristic threshold value, if more than this process is then terminated, otherwise return step 407.
First to be compensated to high frequency component signal in above-described embodiment, then for being compensated to low-frequency signal components,Low-frequency signal components compensation can also be first carried out, then carries out high frequency component signal compensation；Or simultaneously to high frequency component signal and lowFrequency signal component compensates.
As shown in figure 5, for vision signal is divided into two components in the embodiment of the present invention, i.e. high frequency component signal and lowThe third method for realizing vision signal equilibrium for frequency signal component, this method comprises:
Step 501: controller receives vision signal, the feature after determining the high frequency component signal decaying in vision signalCharacteristic value after value and low-frequency signal components decaying；
Step 502: controller is according to the initial characteristic values of preset high frequency component signal and the high-frequency signal of determinationCharacteristic value after component decaying, determines the actual attenuation value of high frequency component signal；
Step 503: controller is according to the initial characteristic values of preset low-frequency signal components and the low frequency signal of determinationCharacteristic value after component decaying, determines the actual attenuation value of low-frequency signal components；
Step 504: controller determines the ratio of high frequency component signal actual attenuation value and low-frequency signal components actual attenuation valueValue；
Step 505: controller be stored in advance the ratio of high frequency component signal pad value and low-frequency signal components pad value withThe corresponding relationship of high frequency component signal offset and low-frequency signal components offset determines corresponding high frequency component signal offsetWith low-frequency signal components offset；
Step 506: controller notifies high frequency component signal equalizer feedback circuit to be mended according to determining high frequency component signalIt repays value to compensate the high frequency component signal in vision signal, notifies low-frequency signal components equalizer feedback circuit according to determinationLow-frequency signal components offset the low-frequency signal components in vision signal are compensated；And terminate this process.
Based on the same inventive concept, a kind of device for realizing vision signal equilibrium is additionally provided in the embodiment of the present invention, byIt is similar with a kind of method for realizing that vision signal is balanced of the embodiment of the present invention in the principle that the device solves the problems, such as, therefore the deviceImplementation may refer to the implementation of method, overlaps will not be repeated.
As shown in fig. 6, for a kind of device for realizing vision signal equilibrium in the embodiment of the present invention, which includes
Signal resolution module 601, for receiving vision signal, according to preset vision signal initial characteristic values withThe characteristic value of the vision signal received determines the actual attenuation value of vision signal；
Signal equalization module 602 determines the equalizer feedback of vision signal for the actual attenuation value according to vision signalThe resistance and capacitor's capacity of circuit, and notify the equalizer feedback circuit of vision signal according to determining resistance and electricityHold capacitance to compensate vision signal, realizes the equilibrium to the vision signal received.
Wherein signal resolution module 601 are specifically used for: with vision signal transmitting terminal make an appointment vision signal transmitting justBeginning characteristic value after receiving vision signal, determines the video letter received since vision signal decays in transmission processNumber decaying after characteristic value, by the difference of the initial characteristic values of the low-frequency signal components and the characteristic value of the vision signal receivedActual attenuation value as the vision signal.
Vision signal is divided at least two video signal components；After signal resolution module 601 receives vision signal,First vision signal can be parsed, resolve to multiple video signal components；For a video signal components, signal resolutionModule 601 is according to the initial characteristic values of the preset video signal components and the reality of the video signal components receivedCharacteristic value determines the actual attenuation value of the video signal components；Signal resolution module 601 determines each vision signal point respectivelyThe actual attenuation value of amount.
Signal resolution module 601 and vision signal transmitting terminal each video signal components in vision signal of making an appointment emitInitial characteristic values, since vision signal decays in transmission process, signal resolution module 601 receives vision signalAfterwards, the characteristic value after determining each video signal components decaying received, by the initial characteristic values of each video signal componentsAnd actual attenuation value of the difference of the actual characteristic value after video signal components decaying as the video signal components.With by videoSignal is divided into two video signal components, i.e., for high frequency component signal and low-frequency signal components, signal resolution module 601 is connectAfter receiving vision signal, first vision signal can be parsed, be parsed into high frequency component signal and low-frequency signal components, thenSignal resolution module 601 is according to the actual characteristic value of the high frequency component signal after parsing and preset high frequency component signalInitial characteristic values determine the actual attenuation value of high frequency component signal, according to the characteristic value of the low-frequency signal components after parsing and in advanceThe initial characteristic values of the low-frequency signal components of setting determine the actual attenuation value of low-frequency signal components.
Actual attenuation value in signal equalization module 602 according to vision signal determines the resistance and capacitor of vision signalThe method of capacitance includes but is not limited to following three kinds of methods, is introduced separately below:
Method one,
For a video signal components, signal equalization module 602 be stored in advance the classes of attenuation of video signal components withThe corresponding relationship of actual attenuation value and the class of attenuation of video signal components pass corresponding with video signal components offsetSystem；Signal equalization module 602 determines the video signal components pair according to the actual attenuation value of determining each video signal componentsThe class of attenuation answered determines that corresponding video signal components compensate according to the class of attenuation of determining each video signal componentsValue；Signal equalization module 602 determines the actual attenuation value of each video signal components respectively, and according to each video signal componentsThe class of attenuation and actual attenuation value corresponding relationship and the video signal components the class of attenuation and video signal components mendThe corresponding relationship of value is repaid, determines each video signal components offset respectively；Video signal components offset includes video letterThe resistance and capacitor's capacity of number corresponding equalizer feedback circuit of component.
When vision signal is divided into multiple components, for a video signal components, according to the video signal componentsRange of characteristic values divides the corresponding class of attenuation, and controller is respectively that each video signal components divides corresponding decaying etc.Grade, the class of attenuation quantity of each video signal components can be identical, can not also be identical.Wherein each video signal components are mendedRepay the resistance and capacitor's capacity that value is the corresponding equalizer feedback circuit of the video signal components.
After determining each video signal components offset using the above method, signal equalization module 602 passes through each viewAfter the corresponding equalizer feedback circuit of frequency signal component respectively compensates video signal components, signal equalization module 602 is rightEach video signal components after equilibrium treatment are analyzed again, the spy of each video signal components after judging equilibrium treatmentWhether value indicative is greater than the characteristic threshold value of the corresponding setting of each video signal components, if more than, then terminate this process, if being not more than,Then return to the step of determining the video signal components pad value.
Method two,
The pad value and the video signal components offset of each video signal components is stored in advance in signal equalization module 602Corresponding relationship；Signal resolution module 601 is by the actual characteristic of the initial characteristic values of video signal components and video signal componentsActual attenuation value of the difference as video signal components of value, signal equalization module 602 is according to the realities of determining video signal componentsThe corresponding relationship of the pad value of border pad value and video signal components and the video signal components offset determines that the video is believedNumber component compensation value.Each video signal components offset includes the electricity of the corresponding equalizer feedback circuit of the video signal componentsHinder resistance value and capacitor's capacity.
After determining each video signal components offset using the above method, signal equalization module 602 passes through each viewAfter the corresponding equalizer feedback circuit of frequency signal component respectively compensates video signal components, signal equalization module 602 is rightEach video signal components after equilibrium treatment are analyzed again, the spy of each video signal components after judging equilibrium treatmentWhether value indicative is greater than the characteristic threshold value of the corresponding setting of each video signal components, if more than, then terminate this process, if being not more than,Then return to the step of determining the video signal components pad value.
Method three,
After vision signal is divided into multiple video signal components, signal resolution module 601 is pre- according to video signal componentsThe actual characteristic value of the vision signal initial characteristic values and video signal components that first set determines each vision signal point respectivelyThe actual attenuation value of amount, signal equalization module 602 calculate separately each video according to the actual attenuation value of each vision signal and believeNumber corresponding video signal components offset of component, and notify the equalizer feedback circuit of corresponding video signal components according to trueFixed video signal components offset carries out video signal components compensation.
After determining each video signal components offset using the above method, signal equalization module 602 passes through each viewAfter the corresponding equalizer feedback circuit of frequency signal component respectively compensates video signal components, signal equalization module 602 is rightEach video signal components after equilibrium treatment are analyzed again, the spy of each video signal components after judging equilibrium treatmentWhether value indicative is greater than the characteristic threshold value of the corresponding setting of each video signal components, if more than, then terminate this process, if being not more than,Then return to the step of determining the video signal components pad value.
Method four,
The ratio and video signal components offset of the pad value of video signal components is stored in advance in signal equalization module 602Corresponding relationship, signal equalization module 602 determines corresponding video letter according to the ratio of the actual attenuation value of video signal componentsNumber component compensation value.
Vision signal is divided into two components, i.e., for high frequency component signal and low-frequency signal components, signal equalizationThe ratio and high-frequency signal of high frequency component signal actual attenuation value and low-frequency signal components actual attenuation value is stored in advance in module 602The corresponding relationship of the offset of the offset and low-frequency signal components of component, signal equalization module 602 are believed according to determining high frequencyThe ratio of number component actual attenuation value and low-frequency signal components actual attenuation value, determines the offset of corresponding high frequency component signalWith the offset of low-frequency signal components.Wherein each high frequency component signal actual attenuation value and low-frequency signal components actual attenuation valueThe offset of the corresponding high frequency component signal of ratio and the offset of low-frequency signal components be by many experiments or practical to surveyTry obtained data.
After determining each video signal components offset using the above method, signal equalization module 602 passes through each viewAfter the corresponding equalizer feedback circuit of frequency signal component respectively compensates video signal components, to each of after equilibrium treatmentVideo signal components are analyzed again, and it is each whether the characteristic value of each video signal components after judging equilibrium treatment is greater thanThe characteristic threshold value of the corresponding setting of video signal components, if more than then terminating this process, if being not more than, returning and determine the videoThe step of signal component pad value.
Signal equalization module 602 compensates vision signal according to the offset after determination, only when vision signal is sent outIt has no progeny between life, when receiving vision signal again, then executes this process.Or controller believes video according to the offset after determinationAfter number compensating, controller periodically executes this process.
As shown in fig. 7, in the embodiment of the present invention vision signal is divided into two components, i.e., high frequency component signal andThe schematic diagram of equalizer feedback circuit for low-frequency signal components, wherein 701 be high frequency component signal equalizer feedback circuit,702 be low-frequency signal components equalizer feedback circuit, and R1 is the resistance of high frequency component signal equalizer feedback circuit, and C1 is high frequencyThe capacitor of signal component equalizer feedback circuit mends high frequency component signal by the resistance value of change R1 and the capacitance of C1It repays；R2 is the resistance of low-frequency signal components equalizer feedback circuit, and C2 is the capacitor of low-frequency signal components equalizer feedback circuit,Low-frequency signal components are compensated by the resistance value of change R2 and the capacitance of C2.Shown in Fig. 7, height is first carried out for vision signalThe compensation of frequency signal component, then carry out low-frequency signal components compensation；Low-frequency signal components compensation can also be first carried out, then carries out high frequencySignal component compensation；Or low-frequency signal components compensation and high frequency component signal compensation are carried out simultaneously.
As shown in figure 8, the system includes balanced device for a kind of system for realizing vision signal equilibrium in the embodiment of the present inventionFeed circuit 801, controller 802, wherein controller 802 includes that any one in the embodiment of the present invention realizes that vision signal is balancedDevice.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the artMind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologiesWithin, then the present invention is also intended to include these modifications and variations.