CN112672084A - Display device and loudspeaker sound effect adjusting method - Google Patents
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Abstract
Description
Technical Field
The application relates to the technical field of televisions, in particular to a display device and a loudspeaker sound effect adjusting method.
Background
With the popularization of broadband internet in households, the internet speed is faster and faster, so people like to arrange surround sound equipment in a living room at home to watch network televisions and enjoy online high-definition videos and music resources.
Current home theater systems are typically identified by the number of speakers that they contain, for example, a 3.1 system typically includes one speaker located to the left of the screen, one speaker located to the right of the screen, a center speaker located below, in front of, or above the screen, and a woofer (whose location is less fixed), which may be located in the same physical unit. The 5.1 system includes two more loudspeakers and the 7.1 system includes two more loudspeakers on its basis.
At present, a home theater is realized by using an external loudspeaker of a television to realize a surround sound effect, and a plurality of video film sources, such as dolby, can decode multi-channel audio data, but a traditional television cannot play the multi-channel effect, so that a sound field still surrounds the left and right of the television, and the sound field in a stereo direction does not exist, thereby affecting the impression effect of users.
Disclosure of Invention
The application provides a display device and a loudspeaker sound effect adjusting method, which are used for solving the problems that the prior television can not play multi-channel effect, does not have sound field in the stereo direction and influences the impression effect of a user.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
in a first aspect, embodiments of the present application disclose a display device, comprising a display screen, a rear housing, and at least one speaker disposed between the display screen and the rear housing, wherein,
the loudspeaker is arranged at the top end of the display screen and comprises a front loudspeaker cavity and a rear loudspeaker cavity, the front loudspeaker cavity faces the top end of the display screen, the rear loudspeaker cavity faces the rear shell, and the rear loudspeaker cavity is lower than the front loudspeaker cavity;
the central axis of the front cavity of the loudspeaker and the display screen form a preset angle.
In a second aspect, an embodiment of the present application discloses a method for adjusting sound effects of a speaker, where the method includes:
respectively acquiring direct sound signals of a loudspeaker and left and right sound channel loudspeakers;
calculating the attenuation amount of the direct sound of the loudspeaker;
and reversely superposing the direct sound signals of the loudspeakers and the attenuation amount to the direct sound signals of the left and right sound channel loudspeakers to offset the direct sound of the loudspeakers.
Compared with the prior art, the beneficial effect of this application is:
the display device comprises a display screen, a rear shell and at least one loudspeaker arranged between the display screen and the rear shell, wherein the loudspeaker is arranged at the top end of the display screen and comprises a loudspeaker front cavity and a loudspeaker rear cavity, the loudspeaker front cavity faces to the top end of the display screen, the loudspeaker rear cavity faces to the rear shell, the loudspeaker rear cavity is lower than the loudspeaker front cavity, and the loudspeaker front cavity inclines towards a ceiling and pronounces towards the top of the display device; the central axis of the front cavity of the loudspeaker and the display screen form a preset angle. The display device provided by the application is additionally provided with the at least one loudspeaker between the display screen and the rear shell, the loudspeaker pronounces sound to the top at a preset angle, the sound generated is reflected by the ceiling to convey a sound field to a watching area of a user, the multichannel surround audio-visual effect of the television can be realized, external sound is not needed, and a real surround sound field is brought to the user.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
fig. 2 is a cross-sectional view of a display device provided in an embodiment of the present application;
FIG. 3 is an enlarged view of the point A in FIG. 2;
fig. 4 is an assembled side view of a display screen and a speaker in the display device provided in the embodiment of the present application;
fig. 5 is a schematic structural diagram of a speaker in a display device according to an embodiment of the present disclosure;
fig. 6 is a sound wave transmission path of reflected sound in a display device provided in an embodiment of the present application;
fig. 7 is a schematic angle diagram of a speaker in a display device according to an embodiment of the present disclosure;
fig. 8 is a schematic view of another angle of the speaker in the display device according to the embodiment of the present disclosure;
fig. 9 is a schematic mechanism diagram of an adjusting mechanism of a speaker in a display device according to an embodiment of the present application;
fig. 10 is a side view of an adjustment mechanism for a speaker in a display device according to an embodiment of the present application;
FIG. 11 is a graph of direct sound intensity versus speaker angle for a display device according to an embodiment of the present disclosure;
fig. 12 is a flowchart of a method for adjusting sound effects of a speaker according to an embodiment of the present disclosure;
fig. 13 is a schematic diagram of direct speaker sound and direct left-right channel sound in a display device according to an embodiment of the present application;
fig. 14 is a schematic view illustrating a sky sound effect adjusting mechanism in a display device according to an embodiment of the disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The traditional television can not play multi-channel effect, namely, the television can only restore 2.0 signals finally, part of the televisions are provided with single subwoofers or middle sound channels, namely, 2.1 or 3.1 effect can be realized, but the support for sky sound is lacked (in 7.1.4 and 5.1.4 systems, the last 4 is sky sound, namely, when a television or a movie program is recorded, 4 recording microphones are arranged on the top of the head of a recorded object, when a playing device also has loudspeakers playing multi-channel, signals recorded by the 4 microphones can be restored, so that people can really feel the sound at the top of the head, and particularly, when scenes such as planes, flying birds and the like are played, people can feel personally), so that a sound field still surrounds the left and right of the television and does not have a sound field in the stereo direction.
In order to solve the above problem, embodiments of the present application provide a display device, where at least one speaker is disposed between a display screen and a rear housing, the speaker is pointed to a top sound of the display device, and conveys a sound field to a viewing area of a user through reflection of a ceiling, so as to bring a real surround sound field to the user.
Referring to fig. 1, fig. 2, and fig. 3, fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application, fig. 2 is a cross-sectional view of the display device provided in the embodiment of the present application, and fig. 3 is an enlarged schematic diagram of a point a in fig. 2.
As shown in fig. 1, 2 and 3, the display device provided in the embodiment of the present application includes adisplay screen 10, arear case 20 and at least onespeaker 1 disposed between thedisplay screen 10 and therear case 20, wherein,
theloudspeaker 1 is arranged at the top end of thedisplay screen 10, that is, theloudspeaker 1 is arranged at the top end of the rear side of thedisplay screen 10, so that thedisplay screen 10 is prevented from blocking the sound of theloudspeaker 1. Theloudspeaker 1 comprises aloudspeaker front cavity 11 and a loudspeakerrear cavity 12, theloudspeaker front cavity 11 faces the top end of thedisplay screen 10, the loudspeakerrear cavity 12 faces therear shell 20, and the loudspeakerrear cavity 12 is lower than theloudspeaker front cavity 11. Namely, theloudspeaker 1 is obliquely arranged at the top of the rear side of thedisplay screen 10, thefront cavity 11 of the loudspeaker is obliquely upward and points to the ceiling to generate sound, the sound signal emitted by the loudspeaker is transmitted to the top space of the television, the sound signal is reflected by the ceiling after meeting the blockage of the ceiling, and the reflected sound can be transmitted to the watching area of a user, so that a real surrounding sound field is brought to the user.
At present, when a loudspeaker is arranged on a television, a sound-producing opening of the loudspeaker is vertically arranged upwards, sound emitted by the loudspeaker is reflected by a ceiling and a wall on the back of the television, but the reflected sound cannot reach a listening position of a user because of no forward direction; or the sound-producing opening of the loudspeaker is horizontally arranged forward, so that the sound produced by the loudspeaker and the sound produced by the loudspeaker positioned at the bottom of the television directly reach the listening position of the user, and the sky is not reflected, and the effect of sky sound cannot be achieved.
In order to solve this problem, in this example, as shown in fig. 4, thefront speaker cavity 11 is inclined upward and faces thedisplay screen 10, and the central axis of thefront speaker cavity 11 forms a predetermined angle with the screen of thedisplay screen 10, so that thespeaker 1 emits sound towards the top of the television, and thefront speaker cavity 11 is set at the predetermined angle so that the sound signal emitted by thespeaker 1 can reach the viewing area of the user right after being reflected by the ceiling, thereby achieving the effect of sky sound. As shown in fig. 5, the horn-shapedfront cavity 11 is adopted as the front cavity of the speaker, so that the distances from the throat of the speaker to the middle and two sides of the horn outlet are different, the time for the sound to propagate is also different (i.e. the phase angle of the outlet part is greatly different), so that the wave front of the outlet part tends to be spherical waves with the throat as the center, the diffusion angle of the sound waves is much smaller than that of the common speaker, the directivity of the sound is enhanced, and the better realization of the directivity of the sound is facilitated.
The preset angle a between thespeaker 1 and thedisplay screen 10 may be determined according to the situation that the display device is installed in the living room of the user, for example, the preset angle a between thespeaker 1 and thedisplay screen 10 is determined by the distance from the user to the display screen, the distance from the top of the display screen to the ceiling, the screen size of the display screen, and the like.
As shown in fig. 6, assuming that the human eye is horizontal to the center of the tv screen, the equation can be derived as follows:
D1＝2×D2×tan A+(1/2)×D3×tan A
tanA＝2×D1÷(4×D2+D3)
wherein D is1Distance of a person from the screen of the television set, D2Distance from the top of the television to the roof, D3Is the television screen size. D1The distance from the viewer to the television camera can be calculated according to the image information, wherein the image information of the viewer is captured by the camera of the television, for example, the television can obtain the image information of the viewer through a depth algorithm of the camera of the television; or can be input through a television menu in a manual setting mode. D2The distance between the top of the television and the roof can be calculated according to the time difference between the laser beam and the laser beam; or can be input through a television menu in a manual setting mode.
Viewing distance D for 65 inch television13 m, the distance D from the top of the television to the ceiling2Is 1.45 meters, the preset angle between the loudspeaker and the display screen can be calculated to be 42 degrees according to the formula. In the actual case, as shown in fig. 7, the directivity angle of a general directional speaker is set to 20 ° to 30 °, and the calculation is performed with 25 ° as the center value, and assuming that the angle of the speaker is set to 42 °, the boundary distance D of the sound reflection is set1' about 4.7 m, and the wall is behind the sofa in the family living room, the sky sound will be reflected on the wall twice and then transmitted to the ears, thereby causing the false appearance that the sound is transmitted from the back. To avoid this problem, it is desirable to reduce the angle a of the speaker to avoid wall reflections as much as possible. Setting the angle to be no more than 42 ° - (25 °/2) — 29.5 ° as described in the above example, gives the effect shown in fig. 8, i.e. no reflection from the rear wall.
If the small viewing distance of the living room is about 2 m, the preset angle a calculated according to the above formula 2 m viewing distance is about 31 °, and 31 ° - (25 °/2) ═ 18.5 ° is obtained in consideration of the directional angle of the sky sound.
In summary, in order to adapt to the general family living room environment, the preset angle a between thespeaker 1 and thedisplay screen 10 is set to be 18.5 ° to 29.5 °. The floor height of a common family living room is about 3 meters, the viewing distance in the common family living room is about 2.5 meters, the height of a television is about 1 meter, the angle between a loudspeaker and a display screen can be calculated and obtained according to a formula and is about 30 degrees, namely the angle of the loudspeaker can be fixedly set to be a fixed value such as 30 degrees according to the use environment of the common family living room, and adjustment is not needed.
Thespeaker 1 may be fixed to the top rear side of thedisplay screen 10 at a preset angle (preferably 30 °) by screws or the like, and may also be fixed to the top rear side of thedisplay screen 10 at a preset angle by snaps or the like, which all belong to the protection scope of the embodiments of the present application.
When thespeaker 1 is mounted on the top rear side of thedisplay screen 10, thespeaker 1 may be disposed on the top rear side of thedisplay screen 10 by a positioning mechanism, and the angle between thespeaker 1 and thedisplay screen 10 may be adjusted by the positioning mechanism. As shown in fig. 9 and 10, the positioning mechanism includes a steppingmotor 6, agear 5 and arack 4, the steppingmotor 6 is fixedly mounted on thedisplay screen 10, thegear 5 is sleeved on an output shaft of the steppingmotor 6, and therack 4 is engaged with thegear 5. When the steppingmotor 6 rotates, the output shaft of the steppingmotor 6 drives thegear 5 to rotate, and thegear 5 drives therack 4 to move left and right.
Therear loudspeaker cavity 12 is fixedly connected with therack 4 through the firstrotating shaft 3, and thefront loudspeaker cavity 11 is rotatably connected with thedisplay screen 10 through the secondrotating shaft 2. When thegear 5 drives therack 4 to move left and right, therack 4 drives thespeaker 1 to rotate around the secondrotating shaft 2 so as to adjust the angle between thespeaker 1 and thedisplay screen 10, thereby changing the directivity of thespeaker 1.
The steppingmotor 6 can rotate forward and backward, when the steppingmotor 6 rotates forward, an output shaft of the steppingmotor 6 drives thegear 5 to rotate, thegear 5 drives therack 4 to move leftward, and therack 4 drives theloudspeaker 1 to rotate leftward, so that the angle A between theloudspeaker 1 and thedisplay screen 10 is reduced; when the steppingmotor 6 rotates reversely, the output shaft of the steppingmotor 6 drives thegear 5 to rotate, thegear 5 drives therack 4 to move rightwards, and the rack drives theloudspeaker 1 to rotate rightwards, so that the angle A between theloudspeaker 1 and thedisplay screen 10 is increased.
After the television is installed, the distance D from the viewer to the television can be acquired through the television with a camera or a laser range finder1Distance D from top of television to ceiling2Or the distance D between the viewer and the television can be manually set by the user1Distance D from top of television to ceiling2And through the menu input of the television, the television calculates the angle between theloudspeaker 1 and thedisplay screen 10 in the living room environment according to the formula, calculates the rotating angle of the stepping motor according to the relationship between the angle relationship and the prestored data controlled by the stepping motor, and then controls the stepping motor to rotate by the corresponding angle so as to adjust the angle between theloudspeaker 1 and thedisplay screen 10.
The cost of electrically adjusting the angle of the speaker is high, so the angle of thespeaker 1 can also be manually adjusted. The television is internally provided with an adjustment instruction, the television automatically calculates the angle to be adjusted and the position instruction to be adjusted by inputting information such as the floor height, the viewing distance, the height of the television cabinet and the like of a family living room in a television menu, and a user can manually adjust different position clamping wires or manual knob screws according to the position instruction to realize the angle adjustment of the loudspeaker.
The adjustment of any angle of the loudspeaker can be realized through the stepping motor, the switching between two fixed angles can be limited actually according to the common family living room environment, for example, a potentiometer can be adopted to replace the stepping motor, a gear and a rack, the judgment is made according to the room size information input by a user, and the angle at which the potentiometer drives the loudspeaker to be fixed is determined.
In this example, twospeakers 1 may be disposed at the rear side of thedisplay screen 10, the twospeakers 1 are disposed at intervals along the length direction of thedisplay screen 10, and the positioning mechanism may be located at the middle position of the two speakers for respectively adjusting the angles of the two speakers, so that the speakers have better balance and lower cost. The positioning mechanism can also be arranged on the left side of the left loudspeaker or the right side of the right loudspeaker, or the two positioning mechanisms are respectively arranged on the left side of the left loudspeaker and the right side of the right loudspeaker.
Because the transmission directivity of the sound is not strong enough, a certain direct sound is still transmitted to human ears, and because the propagation path of the direct sound is shorter than that of the reflected sound, the direct sound can reach the human ears firstly.
As shown in fig. 11, as the angle a between thespeaker 1 and thedisplay screen 10 becomes gradually larger, especially to 90 °, that is, the sound opening of thespeaker 1 is vertically disposed upward, the intensity of the direct sound reaches the maximum, which is defined as 0 dB; when the angle between theloudspeaker 1 and thedisplay screen 10 is 0 °, i.e. the sound opening of theloudspeaker 1 is arranged horizontally forward, the direct sound attenuation is about-30 dB. Therefore, the angle A between the loudspeaker and the display screen can be properly adjusted to respond to the increase of the direct sound intensity of the loudspeaker and reduce the influence of the direct sound on the reflected sound.
In order to reduce the influence of direct sound of a loudspeaker on reflected sound, the embodiment of the application also provides a loudspeaker sound effect adjusting method.
As shown in fig. 12, the method for adjusting sound effect of a speaker according to the embodiment of the present application includes:
s100: direct sound signals of a loudspeaker and a left and right sound channel loudspeaker are respectively obtained.
S200: and calculating the attenuation amount of the direct sound of the loudspeaker.
S300: and reversely superposing the direct sound signals of the loudspeakers and the attenuation quantity to the direct sound signals of the left and right sound channel loudspeakers to offset the direct sound of the loudspeakers.
As shown in fig. 13, the tv set has a left and right channel speakers disposed at the bottom of the tv set in addition to thespeaker 1 disposed at the top of the rear side of the tv set, the left and right channel speakers pronounce forward, that is, all the direct sound of the left and right channel speakers can be transmitted to the user, and by superimposing the direct sound signals of the speakers to the left and right channel signals in reverse phase, the reverse phase signals can be added to the left and right channel direct sound to cancel the direct sound of the speakers, so that the user can only hear the sound from the sky.
Fig. 14 is a flow chart of the direct sound signal, in which the sky sound is inverted by the inverter, multiplied by the attenuation d (a) of the direct sound, and then added to the left and right channels, respectively, to cancel the direct sound of the speaker. The method can also be realized according to a program in a television, the direct sound signals of the loudspeakers are obtained, the attenuation of the direct sound of the loudspeakers is obtained through calculation, the direct sound signals are subjected to phase inversion calculation, then the direct sound signals subjected to phase inversion and the attenuation are multiplied to obtain a calculation result, and the calculation result is added to the direct sound signals of the loudspeakers of the left channel and the right channel so as to offset the direct sound of the loudspeakers.
When the angle A of the loudspeaker is a fixed value, the sky sound signal only needs to be adjusted by a fixed gain; when the angle A of the loudspeaker is two fixed values, the gain is also two values, and the values are calculated according to the room information input by the user in the television menu.
In addition, the attenuation of the direct sound can also be obtained by measurement, a television remote controller is placed at a watching position of a user, a loudspeaker plays sound, a microphone arranged in the remote controller collects the sound and transmits the sound back to the television through a wireless signal (Bluetooth) and the like, and the attenuation can be measured by the television through calculation according to the sound emitted by the loudspeaker and the sound collected by the microphone. The specific method comprises the following steps:
1) the left channel loudspeaker (or the right channel loudspeaker) sends out a section of impact signal, the microphone collects the impact signal and returns the signal to the television, and the television calculates the time difference delta t and the sound intensity difference delta D according to the sent signal and the collected signal.
2) The left loudspeaker (or the right loudspeaker) sends out a section of impact signal (duration time t1), the microphone collects and returns the signal to the television, the television intercepts a section of signal with the duration time t1 from delta t, the signal is subjected to energy weighted operation to be multiplied by the intensity difference delta D, and the signal is compared with the sent sky sound signal, and then the direct sound attenuation of the position where the remote controller is located can be obtained.
The sound effect algorithm adjustment is carried out on the direct sound of the loudspeaker, so that the influence of the direct sound is reduced to the minimum, the built sky sound effect is good, the multichannel surround audio-visual effect of the television is realized, and a real surround sound field is brought to a user.
The speaker described in the above embodiment can also be applied to a laser television (screen sound emission), the speaker can be placed inside the laser television, and in order to obtain good directivity, the number of speakers for each channel can be plural, and a speaker array is configured. The directivity of the loudspeaker array can be adjusted by utilizing the beam forming principle, so that most energy of sky sound can be directly emitted to a ceiling and reflected to ears of a user, and the user can really feel that sound comes from the sky.
The greatest advantage of forming the speaker array is that the branding and array arrangement of the speaker array, including but not limited to the linear arrangement and the rectangular arrangement of the sound post (per sound channel), can be realized more conveniently in the longitudinal direction (X direction) by using the form of the host product.
Like the "sky sound" of a flat panel television, the "sky sound" of a laser television also needs to be controlled with a certain time delay (related to the ceiling height, the actual position of the television and the user), and the common technology changes that the sky sound is earlier than the common sound (for example, 10 ms). In addition, the laser television speaker does not emit low frequency, and the frequency is often more than 500 Hz. This is advantageous for the miniaturization of the loudspeaker unit on the one hand and for the control of the loudspeaker directivity (as is the case for normal sky sounds) on the other hand.
The display device provided by the embodiment of the application comprises a display screen, a rear shell and at least one loudspeaker arranged between the display screen and the rear shell, wherein the loudspeaker is arranged at the top end of the display screen and comprises a loudspeaker front cavity and a loudspeaker rear cavity, the loudspeaker front cavity faces to the top end of the display screen, the loudspeaker rear cavity faces to the rear shell, and the loudspeaker rear cavity is lower than the loudspeaker front cavity, so that the loudspeaker inclines upwards and points to the top of the display screen to pronounce sound, and a sound field is transmitted to a watching area of a user through the reflection of a ceiling; the central axis of the front cavity of the loudspeaker and the display screen form a preset angle, and the preset angle between the loudspeaker and the display screen can be fixed or adjustable to adapt to different rooms and better realize the directivity of sound; the direct sound and the reflected sound of the loudspeaker are transmitted to a user watching area at the same time, the influence of the direct sound on the reflected sound is reduced as much as possible by adjusting the sound effect algorithm of the direct sound of the loudspeaker, the sound emitted by the loudspeaker is transmitted to the user watching area through reflection, the multi-channel surround audio-visual effect of a television is realized, and a real surround sound field is brought to the user.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (10)
1. A display device, comprising a display screen, a rear housing and at least one loudspeaker arranged between the display screen and the rear housing,
the loudspeaker is arranged at the top end of the display screen and comprises a front loudspeaker cavity and a rear loudspeaker cavity, the front loudspeaker cavity faces the top end of the display screen, the rear loudspeaker cavity faces the rear shell, and the rear loudspeaker cavity is lower than the front loudspeaker cavity;
the central axis of the front cavity of the loudspeaker and the display screen form a preset angle.
2. The display device according to claim 1, wherein the speaker is fixed to a top rear side of the display screen at a predetermined angle.
3. The display device according to claim 1, wherein the speaker is disposed at a top end of the display screen through a positioning mechanism, the positioning mechanism includes a stepping motor, a gear and a rack, the stepping motor is fixed on the display screen, the gear is sleeved on an output shaft of the stepping motor, and the rack is engaged with the gear;
the loudspeaker rear cavity is fixedly connected with the rack through a first rotating shaft, and the loudspeaker front cavity is rotatably connected with the display screen through a second rotating shaft.
4. The display device according to claim 3, wherein two speakers are disposed on the display screen, the positioning mechanism is disposed between the two speakers, and the two speakers are respectively connected to the positioning mechanism.
5. The display device as claimed in claim 1, wherein the predetermined angle between the speaker and the display screen is 18.5 ° to 29.5 °.
6. The display device of claim 1, wherein the speaker front volume is a horn front volume.
7. A method for adjusting sound effect of a loudspeaker is characterized by comprising the following steps:
respectively acquiring direct sound signals of a loudspeaker and left and right sound channel loudspeakers;
calculating the attenuation amount of the direct sound of the loudspeaker;
and reversely superposing the direct sound signals of the loudspeakers and the attenuation amount to the direct sound signals of the left and right sound channel loudspeakers to offset the direct sound of the loudspeakers.
8. The method of claim 7, wherein calculating the attenuation of the direct speaker sound comprises:
placing a television remote controller at a user watching position;
playing sound by a television loudspeaker;
a microphone built in the remote controller collects the sound and transmits the sound back to the television;
and the television calculates the attenuation of the direct sound at the position of the remote controller according to the sound emitted by the loudspeaker and the collected sound.
9. The method of claim 8, wherein the step of calculating, by the television, the direct sound attenuation at the location of the remote controller according to the sound emitted by the speaker and the collected sound comprises:
the television calculates the time difference delta t and the sound intensity difference delta D of the sound signals according to the sound signals emitted by the sound channel loudspeaker and the collected sound signals;
the television intercepts a section of sound signal from the collected sound signal of the loudspeaker, and performs energy weighted operation on the sound signal and multiplies the sound signal by an intensity difference delta D;
and comparing the processed sound signal with the sound signal emitted by the loudspeaker to obtain the direct sound attenuation of the position of the remote controller.
10. The method of claim 7, wherein adding the speaker direct sound signal and the attenuation amount in anti-phase to the direct sound signals of the left and right channel speakers to cancel the direct sound of the speakers comprises:
performing inverse phase calculation on the direct sound signal of the loudspeaker;
multiplying the attenuation of the inverted sky sound direct sound and the attenuation of the direct sound;
and respectively adding the multiplied results to the direct sound of the left and right sound channel loudspeakers to offset the direct sound of the loudspeakers.
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| CN201910976740.1ACN112672084A (en) | 2019-10-15 | 2019-10-15 | Display device and loudspeaker sound effect adjusting method |
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| CN201910976740.1ACN112672084A (en) | 2019-10-15 | 2019-10-15 | Display device and loudspeaker sound effect adjusting method |
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Cited By (1)
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