CN102708838A - Method and device for outputting signals by multiple screen processors - Google Patents

Abstract

The invention discloses a method for outputting signals by multiple screen processors. The method comprises the following steps of: according to synchronizing signals, modulating wireless signals, wherein the frequencies of the synchronizing signals are the same with those of field synchronizing signals of video signals of the screen processors; transmitting the wireless signal to each screen processor; receiving the wireless signal by each screen processor; according to the synchronizing signals demodulated from the wireless signals, synchronously outputting the video signals. The invention also discloses a device for outputting the signals by multiple screen processors. According to the method and the device for outputting the signals by multiple screen processors, each screen processor can correctly receive the synchronizing signals; the synchronous output of the video signals of the screen processors is implemented; and the configuration flexibility of a multiscreen display system is improved.

Description

A kind of method and apparatus of multi-screen processor output signal

Technical field

The present invention relates to multi-screen splicing demonstration field, particularly relate to a kind of method and apparatus of multi-screen processor output signal.

Background technology

Present multi-screen image processor; When realizing that the jumbotron splicing shows; All need show with the roaming of the screen of the expansion between a plurality of multi-screen processors; For guarantee each processor display frame synchronously, need to give each processor to provide one to be that the field sync signal of 50HZ or 60HZ is as synchronizing signal with the identical frequency of vision signal; Present implementation all is to be incorporated into this field synchronization on each processor through the form of cable with daisy chain; Promptly synchronizing signal is introduced one of them screen processor through cable; After the shaping driving; Be introduced into another screen processor again, till all processors all obtain synchronizing signal.

There is following problem in this method:

Exist when the first, field sync signal is through cable transmission to postpone, particularly grow Distance Transmission, delay phenomenon is serious; The signal shaping that will pass through each processor drives and also can cause delay in addition, so the synchronizing signal that the different screen processor receives can be owing to postpone cause bigger phase differential, the picture that cause each screen processor to be exported is asynchronous;

The second, transmit owing to introducing extra, so can cause difficult wiring; Lack dirigibility;

Three, field sync signal is deposited when defeated through cable, receives external interference easily, and cable itself also can produce infringement to signal simultaneously, cause each screen processor to be difficult to receive synchronizing signal.

Summary of the invention

The objective of the invention is to propose a kind of method of multi-screen processor output signal, can be so that each screen processor correctly receives synchronizing signal; Realize respectively shielding the synchronous outputting video signal of processor; Improve the configuration flexibility of multihead display system.

The technical scheme that adopts is in order to achieve the above object:

A kind of method of multi-screen processor output signal comprises step:

Modulate wireless signal according to synchronizing signal; Wherein, the frequency of said synchronizing signal is identical with the field sync signal frequency of the vision signal of screen processor itself;

To each screen processor emission wireless signal;

Each said screen processor receives said wireless signal;

According to the synchronizing signal that from said wireless signal, demodulates, synchronous outputting video signal.

The present invention utilizes the wireless mode vision signal output of each screen processor synchronously; Because radio transmission speed is exceedingly fast (light velocity) and can be to space all directions radiation; Receive this synchronizing signal identical wireless signal of field sync signal frequency of the vision signal of multi-screen processor (promptly with) simultaneously so can guarantee to be positioned at each processor of diverse location; Owing to there has not been cable to postpone to interrupt forward delay with each processor; Eliminate the phase differential that the cable transmission synchronizing signal produces, realized the synchronous outputting video signal of each screen processor; Simultaneously, owing to there has not been the constraint of cable, strengthened the dirigibility of system configuration greatly; Wireless signal is not easy to be interfered when spatial transmission, and signal quality is good, is easy to screen processor and receives processing.

In order to improve dirigibility; Preferably, launch said wireless signal by one of them screen processor, said synchronizing signal is the field sync signal of the vision signal of said screen processor itself.

In order to improve dirigibility; Preferably, said synchronizing signal is preset external field synchronizing signal.

In order to adapt to requirements of different users, preferably, launch said wireless signal through the Bluetooth transmission mode.

In order to adapt to requirements of different users, preferably, launch said wireless signal through the infrared emission mode.

The present invention also aims to propose a kind of device of multi-screen processor output signal, can be so that each screen processor correctly receives synchronizing signal; Realize respectively shielding the synchronous outputting video signal of processor; Improve the configuration flexibility of multihead display system.

The technical scheme that adopts is in order to achieve the above object:

A kind of device of multi-screen processor output signal comprises:

Wireless transmitter module is used for modulating wireless signal according to synchronizing signal; And to each screen processor emission wireless signal; Wherein, the frequency of said synchronizing signal is identical with the field sync signal frequency of the vision signal of screen processor itself;

The screen processor wireless receiving module is used to receive said wireless signal;

Output control module is used for the synchronizing signal that basis demodulates from said wireless signal, synchronously outputting video signal.

The present invention utilizes the wireless mode vision signal output of each screen processor synchronously; Because radio transmission speed is exceedingly fast (light velocity) and can be to space all directions radiation; Receive this synchronizing signal identical wireless signal of field sync signal frequency of the vision signal of multi-screen processor (promptly with) simultaneously so can guarantee to be positioned at each processor of diverse location; Owing to there has not been cable to postpone to interrupt forward delay with each processor; Eliminate the phase differential that the cable transmission synchronizing signal produces, realized respectively shielding the synchronous outputting video signal of processor; Simultaneously, owing to there has not been the constraint of cable, strengthened the dirigibility of system configuration greatly; Wireless signal is not easy to be interfered when spatial transmission, and signal quality is good, is easy to screen processor and receives processing.

In order to improve dirigibility; Preferably, said wireless transmitter module is built in the screen processor; Said synchronizing signal is the field sync signal of the vision signal of one of them screen processor itself.

In order to improve dirigibility; Preferably, said synchronizing signal is preset external field synchronizing signal.

In order to adapt to requirements of different users, preferably, said wireless transmitter module is the Bluetooth transmission module; Said wireless receiving module is the bluetooth receiver module.

In order to adapt to requirements of different users, preferably, said wireless transmitter module is an infrared transmission module; Said wireless receiving module is an infrared receiving module.

Description of drawings

Fig. 1 is an embodiment process flow diagram of the inventive method;

Fig. 2 is a structural representation of apparatus of the present invention;

Fig. 3 is to a synoptic diagram of multi-screen processor emission synchronizing signal among the present invention;

Fig. 4 is to another synoptic diagram of multi-screen processor emission synchronizing signal among the present invention;

Fig. 5 utilizes the present invention to carry out a synoptic diagram of multi-screen processor output signal.

Embodiment

For ease of understanding the present invention, set forth below in conjunction with accompanying drawing.

The present invention proposes a kind of method of multi-screen processor output signal, please refer to Fig. 1, comprises step:

S101, modulation wireless signal;

Modulate wireless signal according to synchronizing signal; Wherein, the frequency of synchronizing signal is identical with the field sync signal frequency of the vision signal of screen processor itself.

S102, emission wireless signal;

To each screen processor emission wireless signal.

S103, reception wireless signal;

Each screen processor receives wireless signal.

S104, according to the synchronous outputting video signal of wireless signal.

From wireless signal, demodulate synchronizing signal, according to the synchronized outputting video signal.

The present invention utilizes the wireless mode vision signal output of each screen processor synchronously; Because radio transmission speed is exceedingly fast (light velocity) and can be to space all directions radiation; Receive this synchronizing signal identical wireless signal of field sync signal frequency of the vision signal of multi-screen processor (promptly with) simultaneously so can guarantee to be positioned at each processor of diverse location; Owing to there has not been cable to postpone to interrupt forward delay with each processor; Eliminate the phase differential that the cable transmission synchronizing signal produces, realized the synchronous outputting video signal of each screen processor; Simultaneously, owing to there has not been the constraint of cable, strengthened the dirigibility of system configuration greatly; Wireless signal is not easy to be interfered when spatial transmission, and signal quality is good, is easy to screen processor and receives processing.

In order to improve dirigibility; As a kind of preferred implementation, by one of them screen processor emission wireless signal; Wherein, synchronizing signal is the field sync signal of the vision signal of said screen processor itself.

In order to improve dirigibility; As a kind of preferred implementation, synchronizing signal is preset external field synchronizing signal.

In order to adapt to requirements of different users,, launch wireless signal through the Bluetooth transmission mode as a kind of preferred implementation.

In order to adapt to requirements of different users,, launch wireless signal through the infrared emission mode as a kind of preferred implementation.

Then introduce the device of a kind of multi-screen processor output signal of the present invention's proposition, please refer to Fig. 2, comprising:

Wireless transmit mould 201 is used for modulating wireless signal according to synchronizing signal; And to each screen processor emission wireless signal; Wherein, the frequency of said synchronizing signal is identical with the field sync signal frequency of the vision signal of screen processor itself;

Screen processor wireless receiving module 202 is used to receive wireless signal;

Output control module 203 is used for the synchronizing signal that demodulates according to wireless signal, synchronously outputting video signal.

The present invention utilizes the wireless mode vision signal output of each screen processor synchronously; Because radio transmission speed is exceedingly fast (light velocity) and can be to space all directions radiation; Receive this synchronizing signal identical wireless signal of field sync signal frequency of the vision signal of multi-screen processor (promptly with) simultaneously so can guarantee to be positioned at each processor of diverse location; Owing to there has not been cable to postpone to interrupt forward delay with each processor; Eliminate the phase differential that the cable transmission synchronizing signal produces, realized respectively shielding the synchronous outputting video signal of processor; Simultaneously, owing to there has not been the constraint of cable, strengthened the dirigibility of system configuration greatly; Wireless signal is not easy to be interfered when spatial transmission, and signal quality is good, is easy to screen processor and receives processing.

In order to adapt to requirements of different users, as a kind of preferred implementation, above-mentionedwireless transmitter module 201 is the Bluetooth transmission module; Screen processor wireless receiving module 202 is the bluetooth receiver module.

In order to adapt to requirements of different users, as a kind of preferred implementation, above-mentionedwireless transmitter module 201 is an infrared transmission module; Screen processor wireless receiving module 202 is an infrared receiving module.

In order to improve dirigibility,wireless transmitter module 201 obtains wireless signal according to preset external field synchronizing signal modulation, then wireless signal transmission is gone out; Wherein, preset external field synchronizing signal is identical with the field sync signal frequency of the vision signal of multi-screen processor.

As a kind of preferred implementation, please refer to Fig. 3, comprise n screen processor, externalwireless transmitter module 304;Screen processor 301 comprises screen processor wireless receiving module 311,output control module 312;Screen processor 302 comprises screen processorwireless receiving module 312,output control module 322; Screen processor 30n comprises screen processorwireless receiving module 31n,output control module 31n.

Externalwireless transmitter module 304, wireless signal that will identical with the field sync signal frequency of the vision signal of multi-screen processor itself (frequency is generally 50 hertz or 60 hertz) are modulated on the carrier wave of 2.4G to be launched; Screen processor receives after this wireless signal, demodulates synchronizing signal from this wireless signal, according to the synchronized outputting video signal.

In order to improve dirigibility, as a kind of preferred implementation,wireless transmitter module 201 is built in the screen processor;Wireless transmitter module 201 obtains wireless signal according to the field sync signal modulation of the vision signal of one of them processor, then wireless signal transmission is gone out.

As a kind of preferred implementation, please refer to Fig. 4, comprise n screen processor; As synchronizing signal, inscreen processor 402, comprisewireless transmitter module 412 andoutput control module 422 with the field sync signal of one of themscreen processor 402 itself; Screen processorwireless transmitter module 412 is modulated to the field sync signals ofscreen processor 402 itself on the carrier wave of 2.4G to be launched; Other screen processors receive this wireless signal, then demodulate synchronizing signal, carry out synchronous outputting video signal; Comprise like screen processor 401: screen processorwireless receiving module 411 comprises withoutput control module 421, screen processor 40n: screen processorwireless receiving module 41n and output control module 42n.

Among the above embodiment, can be at built-in wireless launcher of each screen processor and radio receiver; Or at the built-in integrated wireless transmitter of each screen processor.

Introduce a control procedure of utilizing the present invention to carry out synchronous outputting video signal below, please refer to Fig. 5, specific as follows:

Screen processor comprises:input processing unit 501, FPGA (Field-Programmable Gate Array, field programmable gate array) 502;FPGA 502 comprises:frame memory 512, writeclock generator 522,memory controller 532,readout clock generator 542.

Input processing unit 501 receiver, videos are imported, and isolate the digital video signal of the field sync signal and the standard of video itself; The field sync signal of video itself is given and iswrite clock controller 522, writesclock generator 522 and produces according to the field sync signal of video itself and write clock;Memory controller 532 is according to writing clock, and the digital video signal of control criterion writesframe memory 512 in order.

The synchronizing signal that demodulation is come out from wireless signal is givenreadout clock generator 542; The synchronizing signal that readoutclock generator 542 comes out according to demodulation produces readout clock;Memory controller 532 is according to readout clock, andcontrol frame storer 512 is with the digital video signal output of the standard of storage.

The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.

Claims (10)

1. the method for a multi-screen processor output signal is characterized in that, comprises step:

Modulate wireless signal according to synchronizing signal; Wherein, the frequency of said synchronizing signal is identical with the field sync signal frequency of the vision signal of screen processor itself;

To each screen processor emission wireless signal;

Each said screen processor receives said wireless signal;

According to the synchronizing signal that from said wireless signal, demodulates, synchronous outputting video signal.

2. the method for multi-screen processor output signal according to claim 1 is characterized in that said synchronizing signal is preset external field synchronizing signal.

3. the method for multi-screen processor output signal according to claim 1 is characterized in that launch said wireless signal by one of them screen processor, said synchronizing signal is the field sync signal of the vision signal of said screen processor itself.

4. according to the method for each described multi-screen processor output signal of claim 1 to 3, it is characterized in that, launch said wireless signal through the Bluetooth transmission mode.

5. according to the method for each described multi-screen processor output signal of claim 1 to 3, it is characterized in that, launch said wireless signal through the infrared emission mode.

6. the device of a multi-screen processor output signal is characterized in that, comprising:

Wireless transmitter module is used for modulating wireless signal according to synchronizing signal; And to each screen processor emission wireless signal; Wherein, the frequency of said synchronizing signal is identical with the field sync signal frequency of the vision signal of screen processor itself;

The screen processor wireless receiving module is used to receive said wireless signal;

Output control module is used for the synchronizing signal that basis demodulates from said wireless signal, synchronously outputting video signal.

7. the device of multi-screen processor output signal according to claim 6 is characterized in that said synchronizing signal is preset external field synchronizing signal.

8. the device of multi-screen processor output signal according to claim 6 is characterized in that said wireless transmitter module is built in the screen processor; Said synchronizing signal is the field sync signal of the vision signal of one of them screen processor itself.

9. according to the device of each described multi-screen processor output signal of claim 6 to 8, it is characterized in that said wireless transmitter module is the Bluetooth transmission module; Said wireless receiving module is the bluetooth receiver module.

10. according to the device of each described multi-screen processor output signal of claim 6 to 8, it is characterized in that,

Said wireless transmitter module is an infrared transmission module; Said wireless receiving module is an infrared receiving module.

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