TWI498001B - Distributed video control system and distributed video control method - Google Patents

Description

Decentralized video and audio control system and distributed video and audio control method

The invention relates to audio and video transmission, in particular to a distributed video and audio control system and a distributed video and audio control method.

Please refer to FIG. 1 , which is a schematic diagram showing a conventional distributed video and audio control system. As shown in Fig. 1, the transmitting terminal TX compresses the video and audio of different audio and video sources in real time, and distributes them to different DVB-T channels for transmission through the coaxial cable. Each of the receiving ends RX1 to RX3 respectively receives video and audio data with their respective conversion boxes and selects channels displayed by the respective video output devices VO1 to VO3.

However, the above-described conventional distributed video and audio control system 1 will encounter many problems in practical applications:

(1) When the user wants to switch the distributed video and audio control system 1 to the splitter mode, the user has to manually switch the channel of the display, which is quite time consuming.

(2) A command is required to control a transmitter TX to display a marquee message.

(3) Under the architecture of the distributed video and audio control system 1, the respective transmitting terminals TX may be distributed in different places.

(4) It is not possible to schedule different times and switching for the content played by each TV.

Therefore, the present invention proposes a distributed video and audio control system and a distributed video and audio control method to solve the above problems encountered in the prior art.

A decentralized video and audio control system in accordance with an embodiment of the present invention. In this embodiment, the method includes: at least one control module configured to generate a first modulation control signal transmitted through a transmission medium; and at least one transmission module coupled to the control module, each The transmission module has a channel information, and the multimedia signal is converted into an RF signal according to the channel to be output to the transmission medium, and each transmission module receives the first modulation control signal via the transmission medium. And demodulating the first modulation control signal into a control command, and executing the control command.

In another embodiment, the present invention provides a distributed video and audio control system, including: at least one control module coupled to the transmission medium, each control module generating a first modulation control signal to a And the at least one receiving module has a display channel information, each receiving module is coupled to the transmitting medium and receives at least one RF signal, and each receiving module selects a corresponding RF according to the displayed channel information. The signal is restored to the corresponding multimedia signal, and each receiving module receives the first modulation control signal through the transmission medium, and demodulates the first modulation control signal into a first control command. And determining, according to the first control command, whether to update the displayed channel information.

In another embodiment, the present invention further provides a distributed video and audio control method, including the steps of: providing at least one control module, at least one receiving module, and at least one transmitting module, respectively, using a transmission medium Each of the transmission modules has a channel information, and each of the receiving modules has a display channel information; the at least one transmission module respectively converts a multimedia signal into an RF signal according to the associated channel and Outputting to the transmission medium; the at least one receiving module respectively receives at least one RF signal from the transmission medium, and each receiving module selects a corresponding RF signal according to the display channel information, and restores the RF signal to a corresponding one The multimedia signal is selected; and at least one of the control modules is selected to generate a modulation control signal for changing display channel information of at least one of the receiving modules or controlling at least one of the transmission modules.

In another embodiment, the present invention further provides a distributed video and audio control system, comprising: a plurality of transmission modules, and a plurality of receiving modules are coupled through a plurality of coaxial cables; each of the transmission modules will A video signal is frequency modulated to correspond to An associated RF signal of a frequency band of the channel information is output through the coaxial cable; each receiving module selects an RF signal corresponding to the channel according to the information of the displayed channel, and restores the associated RF signal to a corresponding one. a video signal; a receiving module, respectively, a first control command and a second control command are converted into a first modulation control signal and a second modulation control signal according to a user input interface, and through the coaxial cable Line output; the other receiving module receives the first modulation control signal through the coaxial cable, and demodulates the modulation control signal into the first control command, and determines whether to update the display according to the first control command. Channel information; the other transmission module receives the second modulation control signal through the coaxial cable, and demodulates the second modulation control signal into the second control command, and determines whether to update according to the second control command. Channel information.

In another embodiment, the present invention further provides a distributed video and audio control system, including: a plurality of transmission modules, and a plurality of receiving modules, each coupled through a plurality of coaxial cables; each of the transmission modules The audio and video signals of the frequency band corresponding to the information of the channel information are frequency-modulated and output through the coaxial cable; each receiving module selects an RF signal corresponding to the channel according to the information of the displayed channel, and the RF signal is The signal is restored to the corresponding audio and video signal; a receiving module can convert a control command into a modulation control signal according to a user input interface, and output through the coaxial cable; and other receiving modules through the coaxial The cable receives the modulation control signal, and demodulates the modulation control signal into the control command, and determines whether to update the channel information according to the control command.

In another embodiment, the present invention further provides a distributed video and audio control method, which is applied to a distributed video and audio control system, where the distributed video and audio control system includes a transmission medium, a receiving module and a transmission module. The method includes the following steps: (a) the receiving module generates a modulation control signal to the transmission medium; (b) the transmission module receives an audiovisual signal and receives the modulation control signal from the transmission medium; (c) the transmission The module demodulates the modulation control signal to form a first control signal, and converts the video signal into an RF signal according to the first control signal to the transmission medium; and (d) the receiving module receives the RF signal Signal and restore the RF signal to relative The audio and video signals should be.

Compared with the prior art, the distributed video and audio control system and the distributed video and audio control method according to the present invention have the following advantages:

(1) Decentralized setting, suitable for long-distance transmission, and no need to specially design the receiving end RX.

(2) The control module can be set at any position without the need to control at the transmitting end TX; or the control module can be integrated in the receiving module. The control module can select the control transmission module or control the receiving module as needed or control both at the same time.

(3) The control module can perform video switching schedule planning and control, and immediately order a transmitter TX to display the marquee message.

(4) The control module can be matched with infrared rays to perform channel selection control of the display of the receiving end RX.

(5) Communicate with the transmitting terminal TX by using the coaxial cable that has been set up, without adding additional lines or network equipment.

(6) The control module also has the characteristics of multi-point setting.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

1, 2a, 2b, 3‧‧‧Distributed audio and video control system

S10~S144‧‧‧ Process steps

VI, VI1~VI3‧‧‧ audio and video source device

TX, TX1~TX3‧‧‧ transmission module

CL‧‧‧ coaxial cable

CB‧‧‧Control Module

VO, VO1~VO3‧‧‧ audio and video output device

RX1~RX3‧‧‧ Receiver

SP‧‧‧Handheld device

40‧‧‧ input unit

41‧‧‧Display unit

42‧‧‧ processor

43‧‧‧Transporter

44‧‧‧Transformer

45‧‧‧ Coupler

MM‧‧‧Modulation Module

USER‧‧‧ input signal

IR‧‧‧ output control signal

10‧‧‧Sound Processor

11‧‧‧Image Processor

12‧‧‧Synthesizer

13‧‧‧second processor

15‧‧‧Demodulation transformer

17‧‧‧Low-pass filter

IMM‧‧‧Audio Modulation Module

14‧‧‧Compression Module

16‧‧‧Transformer

18‧‧‧ Mixer

19‧‧‧Channel Coupler

AV, AV1~AV3‧‧‧Multimedia signal

AD‧‧‧Sound signal

VD‧‧‧ video signal

CD‧‧‧First Control Information

MC‧‧‧First Control Signal

Text‧‧‧Display information

30‧‧‧Sound switching unit

31‧‧‧Image switching unit

CH1~CH3‧‧‧ output control signal

51‧‧‧ Coupler

52‧‧‧ processor

53‧‧‧ Demodulator

54‧‧‧frequency modulator

MO‧‧‧mixing output module

55‧‧‧Multimedia demodulator

56‧‧‧Multimedia image processor

57‧‧‧Multimedia audio and video transmitter

USIN‧‧‧User input

Figure 1 is a schematic diagram showing a conventional distributed video and audio control system.

2A is a schematic diagram showing a distributed video and audio control system in a specific embodiment in which a control module is independently disposed outside a receiving module according to the present invention.

2B is a schematic diagram showing a distributed video and audio control system in a specific embodiment in which a control module is integrated in a receiving module according to the present invention.

FIG. 3A is a schematic diagram showing a distributed video and audio control system in another embodiment in which the control module according to the present invention is independently disposed outside the receiving module.

FIG. 3B is a schematic diagram showing a distributed video and audio control system in another embodiment of the control module independently disposed in the receiving module according to the present invention.

Figure 4A shows a control module CB in a distributed video and audio control system Example.

Figure 4B is a schematic diagram of an embodiment of a receiving module.

Figure 4C is a schematic view of another embodiment of the control module of the present invention.

Fig. 5 is a diagram showing an embodiment of a transmission module TX in a distributed video and audio control system.

Figure 6 is a diagram showing another embodiment of the transmission module TX in the distributed video control system.

7A and 7B show that the first video output device VO1 to the third video output device VO3 in the distributed video and audio control system respectively play the first multimedia signal AV1, the second multimedia signal AV2 and the third multimedia. Embodiments of the body signal AV3 and the change channel.

The 7C is a schematic diagram of controlling the channel switching by the control module outputting the first modulation control signal via the transmission medium.

Fig. 8A is a diagram showing an embodiment of a distributed video and audio control system using the present invention.

Fig. 8B is a diagram showing another embodiment of realizing a video splitter using the distributed video and audio control system of the present invention.

Figure 8C is a schematic diagram of the use of the transmission module architecture shown in Figure 6 to achieve image segmentation.

9A and 9B are flow charts showing a distributed video and audio control method in accordance with a specific embodiment of the present invention.

Figure 10 is a diagram showing the sub-steps involved in step S10 or S10a in Figure 9A or 9B.

Figure 11 is a diagram showing the sub-steps involved in step S14 or S14a in Figure 9A or 9B.

A preferred embodiment of the present invention is a distributed video and audio control system. In practical applications, the distributed video and audio control system uses the coaxial cable that has been set up as the transmission medium to communicate with the transmitting end and does not need to specially design the receiving end. It can be applied to the matrix video switching device of DVB-T technology, but not This is limited to this.

Please refer to FIG. 2A. FIG. 2A is a schematic diagram showing a distributed video and audio control system according to an embodiment of the present invention. As shown in FIG. 2A, the distributed video and audio control system 2a includes a video source device VI, an output module OM, and a transmission medium, which are composed of a plurality of coaxial cables CL, a transmission module TX, and a control module CB. The video source device VI is coupled to the transmission module TX. The transmission module TX is coupled to the output module OM and the control module CB by the coaxial cable CL. The coupling mode of the embodiment can be regarded as a serial connection. That is, each device is connected through a coaxial cable CL through an interface of one in and one out; the control module CB also has one in and out telecommunications interfaces respectively through two coaxial cables and an output module OM and a transmission mode The group TX is coupled. In addition, in another embodiment, the control module CB can be coupled to the output module OM by wireless or wired to transmit a control signal to control the video output device. In this embodiment, the output module OM has a video output device VO, such as a liquid crystal display or a plasma display, and a receiving module RX is coupled with the coaxial cable to provide control of the audio output device VO. In addition, in another embodiment, the RX may also be independently disposed outside the video output device VO. In addition, in an embodiment, the control module CB can be independently configured or integrated in the transmission module TX or the receiving module RX. In this embodiment, the control module CB is independently disposed outside the transmission module TX and the output module OM, and is in an independent setting.

In this embodiment, the distributed video and audio control system 2a includes a single audio source device VI and a single output module OM. The transmission module TX itself is set to have a channel information. Therefore, when the transmission module TX receives the multimedia signal from the video source device VI, the multimedia signal is converted into a radio frequency signal according to the channel information. The RF signal has a frequency band corresponding to the information of the associated channel, and then the transmission module TX outputs the RF signal to the coaxial cable CL. It should be noted that the multimedia signal can be an image signal, an audio signal or a combination of image and audio signals. The control module CB generates a first modulation control signal to the coaxial cable CL and transmits it by the coaxial cable CL. When the transmission module TX receives the first modulation control signal via the coaxial cable CL, the transmission module TX demodulates the modulation control signal into a control command and executes the control command. The control command can control the transmission module TX to perform switching of the channel information, time scheduling, display information overlay or any combination of the foregoing. Wherein, when the switching of the channel information is performed, the control command includes The channel information enables the transmission module TX to change the channel information according to the channel information in the control signal, and then the multimedia signal is frequency-modulated to the frequency band corresponding to the information of the channel; and the time scheduling control is the control transmission mode. When does the group TX change its channel information or when it starts to output the multimedia signal to the RF signal; the display information overlay means that the control command contains display information, which allows the transmission module TX to display the information The image information in the multimedia signal is superimposed to form an effect such as a marquee.

Then, when the receiving module RX in the output module OM receives the RF signal via the coaxial cable CL, the RF signal is decoded to restore the RF signal to a multimedia signal and output to the AV output device VO. The video output device VO then outputs a corresponding multimedia message according to the multimedia signal, for example, sound, video or audio and video. It should be noted that the receiving module RX has a display channel information. Generally speaking, the display channel information corresponds to the channel information corresponding to the RF signal, so that the video output device VO can smoothly output the multimedia information. In an embodiment, the display channel information may be changed, and the manner of the change may be various. In an embodiment, the wireless or wired control signal may be generated by the control module CB by controlling the receiving mode of the output module OM. Group RX. For example, the control module CB can transmit an infrared signal corresponding to the channel information to the receiving module RX. When the receiving module RX receives the infrared signal, the display channel information can be changed according to the channel information contained in the infrared signal. .

In addition, in another embodiment, the control module CB can control the receiving module RX of the output module OM through a second modulation control signal. The second modulation signal generated by the control module CB contains channel information and is output to the coaxial cable CL. After receiving the second modulation signal via the coaxial cable CL, the receiving module RX performs demodulation to obtain the channel information. At this time, the receiving module RX has a processor therein, and can determine whether to change the belonging information according to the channel information. The channel information is displayed. If the channel information in the second modulation signal is different from the display channel information of the receiving module RX, the channel information is changed, and otherwise the original channel information is maintained.

Please refer to FIG. 2B, which is a schematic diagram of another embodiment of the distributed video and audio control system of the present invention. The distributed video and audio control system 2b of this embodiment is basically similar to the second embodiment, except that the control module CB is integrated in a receiving module RX. In this implementation In the example, the receiving module RX and the video output device VO are separate components, that is, the incoming and outgoing telecommunication interfaces of the receiving module RX are respectively connected to the coaxial cable CL, and the receiving module RX reuses one of the multimedia signal outputs. For example, the HDMI output terminal, the DVI output terminal, or the AV output terminal, etc., but not limited thereto, is connected to the video output device VO, so that the video output device VO can receive the multimedia signal and play. It should be noted that, in the embodiment, the receiving module RX and the video output device VO are two independent components. In another embodiment, the receiving module may be integrated into the video output device VO. The control module CB can control the transmission module TX by the first modulation signal. Since the control module CB is integrated in the receiving module RX, the control module CB can transmit the information of the control switching channel to the receiving module RX through the internal line to perform channel replacement.

Please refer to FIG. 3A, which is a schematic diagram of a distributed video and audio control system according to another embodiment of the present invention. As shown in FIG. 3A, the distributed video and audio control system 3a includes audio and video source devices VI1 to VI3, output modules OM1 to OM3, transmission media including a plurality of coaxial cables CL, transmission modules TX1 to TX3, and control module CB. . The audio and video source devices VI1 to VI3 are respectively coupled to the transmission modules TX1 to TX3; the transmission modules TX1 to TX3, the output modules OM1 to OM3, and the control module CB are respectively coupled by the plurality of coaxial cables CL. The coupling mode of the embodiment is that the transmission modules TX1~TX3, the output modules OM1~OM3, and the control module CB respectively have a signal input and a signal output interface, which are respectively connected with a coaxial cable CL, and the other cable One end is connected to the signal input or output interface of any one of the adjacent transmission modules TX1~TX3, the output modules OM1~OM3 and the control module CB.

In an embodiment, each of the transmission modules TX1~T3 has a channel information, and the channel information of each of the transmission modules TX1~T3 is different. Therefore, when the transmission modules TX1~TX2 receive the multimedia signals from the coupled audio source devices VI1~VI3, the multimedia signals are converted into RF signals according to the associated channel information, and the RF signals have corresponding to the RF signals. The frequency band of the channel information, and then the transmission modules TX1~TX3 output the RF signal to the coaxial cable CL. Therefore, there are multiple RF signals on the coaxial cable CL, and each RF signal corresponds to a different frequency band. The control module CB can generate a first modulation control signal for controlling the plurality of transmission modules TX1~TX3. In an embodiment, the control module CB can generate a first modulation signal according to the user's setting, and has a control command that can control at least one of the transmission modules TX1 to TX3. The control command may include controlling each transmission module to perform Switching of channel information, time scheduling, display information overlay, or any combination of the foregoing. It is as described above in FIG. 2A and will not be described herein.

Each of the output modules OM1 OM OM3 has a video output device VO and a receiving module RX, which can be integrated into the audio output device VO or independently disposed outside the video output device VO. In this embodiment, each receiving module RX is integrated with each of the video output devices VO. The receiving module RX has a display channel information, and each receiving module selects an RF signal corresponding to the displayed channel information according to the associated display channel information, and restores the RF signal to a multimedia signal, and outputs the video signal to the audio output. Device VO. In addition, it should be noted that the control module CB can control the display content of each of the output modules OM1~OM3. In an embodiment, the control module CB can control the output modules OM1~OM3 through wireless or wired transmission. The receiving module RX is provided to change the display channel. The wireless method may include a method of controlling through infrared rays, but is not limited thereto. As for the wired mode, a second modulation control signal carrying the change information of the RX channel of the single or multiple receiving modules can be transmitted through the coaxial cable CL, and the command for changing the channel is provided, so when each output module The second modulation control signal received by the OM1~OM3 from the coaxial cable CL can be demodulated, and then restored to a channel change command, and the channel information in the change channel command is used to determine whether to update the associated display. Channel information. In addition to the above-mentioned way of using the coaxial cable CL, it can be additionally connected to the receiving module RX of the output modules OM1~OM3 through another transmission line, and will be controlled by a specific communication protocol, for example, an RS485 transmission protocol. The command is passed to the receiving module RX.

In addition, the control module CB can be coupled to a handheld device SP in a wireless or wired manner. This embodiment is a wireless mode. The control module CB receives the user input information generated by the handheld device SP, and converts the user input information into the first modulation signal, the second modulation signal, or a wireless control command. The handheld device SP can be a mobile phone or a tablet, but is not limited thereto. In an embodiment, an application may be installed in the handheld device SP to provide a user input interface to generate information input by the user. In addition, it should be noted that although the number of control modules CB in FIG. 3A is only one, it is not limited thereto, and a plurality of control modules CB may be set according to requirements.

Please refer to FIG. 3B, which is another embodiment of the present invention. Schematic diagram of a decentralized video and audio control system. In this embodiment, the architecture of the embodiment is similar to that of the third embodiment. The difference is that the control module CB of the embodiment is integrated with the receiving module RX of each of the output modules OM1 OM3 to form a one-to-one Configuration. In other words, each receiving module RX has a control module CB. Each of the control modules CB of the embodiment may generate a first modulation control signal and/or a second modulation control signal, wherein the first modulation control signal is used to select and control a transmission mode connected to the coaxial cable CL. The groups TX1~TX3, and the second modulation control signal are used to select and control the receiving module RX included in the output modules OM1~OM3 connected to the coaxial cable CL. The control details of the first modulation control signal and the second modulation control signal are as described in the foregoing 3A or 2A-2B, and are not described herein. It should be noted that the architecture of the foregoing FIG. 3A can be mixed with the architecture of FIG. 3B. In addition, the control module CB shown in the foregoing FIG. 2A to FIG. 3B can simultaneously have the capability of controlling one or more transmission modules RX to TX and one or more receiving modules TX, but is not limited thereto. For example, in one embodiment, the control module CB is only used to control one or more receiving modules RX, or in another embodiment, the control module CB is only used to control one or more transmissions. The module TX, these implementations and application aspects, can be changed by those skilled in the art in accordance with the spirit of the present invention.

Please refer to FIG. 4A, which illustrates an embodiment of a control module CB in a distributed video control system. In FIG. 4A, the control module CB includes an input unit 40, a display unit 41, a processor 42, a transmitter 43, and a modulation module MM. In an embodiment, the modulation module MM includes a modulator 44. And a coupler 45. The processor 42 is coupled to the input unit 40, the display unit 41, the transmitter 43 and the modulator 44, respectively; the modulator 44 is coupled to the coupler 45.

In this embodiment, the input unit 40 is configured to receive a user input USIN. In this embodiment, the user input USIN can be from the handheld device SP (as shown in FIG. 3A or FIG. 3B) or an input interface built on the control module CB, such as a touch panel or a button. For the convenience of operation, the display unit 41 on the control module CB can display the related information of the user input USIN, so that the user can perform the identification confirmation menu or the input data when inputting by the input interface provided on the control module CB. The processor 42 generates the first control data and/or the second control data according to the user input USIN, wherein the first control data is used to control the transmission module TX, and the second control data is used to control the receiving module RX. The first control data is transmitted to the modulation module MM by The internal modulator 44 adjusts the first control data to a first modulation control signal having a fixed frequency, and is then carried by the coupler 45 via the signal output interface DVBO to the coaxial cable CL. On the other hand, if the user inputs information including the control receiving module RX in the USIN, for example, changing the control information of the display channel information, the processor 42 converts the information into the second control data, and then converts the information to the second control data. A wired or wireless control command in a specific format, for example, an infrared control signal in Figure 4A. The infrared control signal can be received by the receiving module RX having an infrared receiver. Since the receiving module RX itself has a display channel information, after receiving the receiving module RX, the infrared signal can be processed to obtain the channel information contained therein, and then whether to change the display channel information. In addition, in another embodiment, the transmitter 43 can also be a wired transmission module such as RS485. Therefore, the output control signal generated by the transmitter 43 can be an RS485 signal and transmitted to the receiving module RX through a corresponding method. RS485 module, but not limited to this. It should be noted that the second control data transmitted by the transmitter may be one (control module CB) to one (receiving module RX), or one (control module CB) to multiple (receiving module RX). There are no specific restrictions on control.

It should be noted that, in another embodiment, the control module CB of FIG. 4A can also convert the second control data into a second modulation signal by using the modulator 44. It is then carried via the coupler 45 to the coaxial cable CL for transmission to other receiving modules at the far end. In this embodiment, the second control data is transmitted by using the control module CB of FIG. 4A, and the control module CB and the receiving module RX are used in an independent architecture (for example, the architecture shown in FIG. 2A or FIG. 3A). . In this architecture, the receiving module RX in the remote output module OM can be as shown in FIG. 4B, which is a schematic diagram of an embodiment of the receiving module. In this embodiment, the receiving module RX has a coupler 51, a processor 52, a demodulator 53, and a demodulation module DM. The demodulation module DM is configured to receive the RF signal via the coaxial cable CL and restore the RF signal to a multimedia signal and update the displayed display channel information according to the control of the processor 52. The demodulation module DM includes a frequency modulator 54, a multimedia demodulator 55, a multimedia image processor 56, and a multimedia transmission processor 57. The coupler 51 is coupled to the coaxial cable CL for receiving at least one RF signal and/or a second modulation control signal transmitted on the coaxial cable CL. It should be noted that each RF signal corresponds to a different frequency band, and each frequency band corresponds to a specific channel. The frequency modulator 54 has a display channel information, so when the receiving module RX is from the coaxial cable When receiving at least one RF signal on the 52, the frequency modulator 54 captures the RF signal corresponding to the channel information and transmits it to the multimedia demodulator 55. The multimedia demodulator 55 demodulates the RF signal to restore the RF signal to a compressed multimedia signal, which is decompressed by the multimedia image processor 56 to be restored to a multimedia signal, and then transmitted to the video and audio via the multimedia audio and video transmitter 57. Output device VO.

In addition, when the second modulation control signal is included in the coaxial cable CL, the coupler 51 transmits the second modulation control signal to the demodulator 53 to demodulate the second modulation control signal, and the solution The adjusted signal is transmitted to the processor 52, and the processor 52 determines whether to change the display channel information of the receiving module RX according to the content of the signal. If it is to be changed, the processor 52 generates a second control data to the frequency modulator 54 according to the channel information to be changed. After receiving the second control data, the frequency modulator 54 changes the current display channel information according to the channel information.

Please refer to FIG. 4C, which is a schematic diagram of another embodiment of the control module of the present invention. The embodiment of the embodiment is an architecture in which the control module CB and the receiving module RX are integrated. The receiving module RX in this embodiment has a control module CB and a demodulation module DM. The control module CB has an input unit 40, a display unit 41, a processor 42, a transmitter 43, a modulator 44, a coupler 45, and a demodulator 46. The demodulation module DM includes a frequency modulator 54, a multimedia demodulator 55, a multimedia image processor 56, and a multimedia video transmitter 57. The receiving module RX in this embodiment can be applied to the architecture as shown in FIG. 2B or FIG. 3B. Referring to FIG. 3B and FIG. 4C simultaneously, in an embodiment, the user can communicate with the control module CB by using the handheld device SP. There is a user interface on the handheld device SP that can be installed in the handheld device SP by downloading the application. The user of the handheld device SP is the operating interface to select one or more receiving modules RX or the receiving mode RX group of the local machine, or the remote transmitting module TX or both.

First, the transmission module TX for controlling the remote end will be described. The control module CB can input one or more transmission modules TX to be controlled through the operator interface. In an embodiment, the user generates the user input USIN through the handheld device SP, which may include switching the channel information of the remote transmission module TX or setting the time for the remote transmission module TX to operate, for example: cycle Sexual or single-time set time point for the transmission module TX to change the channel information to transmit the radio frequency signal corresponding to the corresponding channel information of the multimedia signal to the coaxial cable CL, or The display message, for example, a marquee message, allows the transmission module TX to superimpose the marquee message onto the video signal on the multimedia signal to be converted into an RF signal. After receiving the user input USIN, the input unit 40 converts the input signal to the processor 42, and the processor 42 converts the input signal into the first control data and transmits the signal to the modulator 44, and the modulator 44 transmits the first control signal. It is converted into a first modulation control signal and output to the coupler 45. The coupler 45 then carries the first modulation control signal to the coaxial cable CL for transmission to the remote transmission module TX. As for how the transmission module TX processes the first modulation signal, it will be described later.

Next, the control module CB controls the implementation of the receiving module RX. In one embodiment, the user generates a user input USIN through the handheld device SP. The user input USIN includes a channel information and a corresponding receiving module to be controlled when controlling the receiving module RX. The receiving module RX of the controlled terminal changes its current display channel information according to the channel information. It should be noted that the input interface on the handheld device SP has a display channel information that allows the user to select which receiving module and input to be changed. The control module CB receives the user information from the handheld device SP via the input unit 40 and converts it into an input signal. The processor 42 receives the input signal and converts it into a second control material. The second control data is transmitted to the coupler 44 to be converted into a second modulation control signal, and then transmitted to the coaxial cable CL via the coupler 45 for transmission to the other receiving module RX. As for the operation mode of the demodulation module DM, it is the same as the operation mode of the demodulation module DM of FIG. 4B, and will not be described herein.

In addition, when the coupler 45 in the control module CB receives the second modulation control signal sent from the other receiving module RX, the second modulation control signal is transmitted to the demodulator 46 for demodulation. The controller 46 demodulates the second modulation control signal, and the result of the demodulation is transmitted to the processor 42. The processor 42 determines whether to change the display channel information of the receiving module RX based on the result of the demodulation. In an embodiment, the display channel information is present in the frequency modulator 54 in the demodulation module DM. When the processor 42 determines that the channel of the receiving module is to be changed according to the demodulated signal, the processor 42 generates a second control data for the transmitter 43 to convert the second control command CMD to the frequency modulator 54 for displaying the channel information. Changes. In addition, in another embodiment, if the control module CB is to control the receiving module RX itself, it can be directly input to the input unit 40 through the user, and then converted into the second control data by the processor 42 to the transmitter. 43 converts to a second control command CMD to the frequency modulator 54.

Next, an embodiment of the receiving module of the present invention will be described. Referring to FIG. 5, an embodiment of the transmitting module TX in the distributed video and audio control system is illustrated. As shown in FIG. 5, the transmission module TX includes a multimedia signal processor MP, a synthesizer 12, a second processor 13, a demodulation transformer 15, a low-pass filter 17, and a video tone modulation module IMM. The multimedia signal processor MP is configured to decode the multimedia signal from the video source device VI. The AV source device VI can be a multimedia signal output by a computer or a media player, such as HDIMI, DVI or AV signal, but is not limited thereto. In an embodiment, the multimedia signal processor MP includes a sound processor 10 and an image processor 11, wherein the sound processor 10 is coupled to the audio and video modulation module IMM; the image processor 11 is coupled to the synthesizer 12; The second processor 13 is coupled to the synthesizer 12 and the audio and video modulation module IMM; the demodulation transformer 15 is coupled to the second processor 13; the low pass filter 17 is coupled to the audio and video modulation module IMM; The audio-visual modulation module IMM is coupled to the low-pass filter 17 . It should be noted that although the embodiment has the synthesizer 12, the component is not a necessary component of the transmission module TX of the present invention, that is, if the content of the synthetic image is used in the context, the component may be added.

It is assumed that only a single multimedia signal AV is transmitted to the transmission module TX. When the transmission module TX receives the multimedia signal AV, the multimedia signal processor MP decodes and processes the multimedia signal AV and generates multimedia data, which can add images to sound, image or sound. In the embodiment, the multimedia signal processor MP and the image processor 11 respectively generate the sound data AD and the image data VD to the audio and video modulation module IMM through the sound processor and the image processor 11. The audio and video modulation module IMM converts the multimedia data AD and VD into an RF signal according to the channel information. In this embodiment, the audio and video modulation module IMM includes a compression module 14, a modulator 16, and a mixing output module MO. The compression module 14 is coupled to the sound processor 10, the synthesizer 12, and the modulator 16 for compressing the multimedia signal to become a compressed multimedia signal. The modulator 16 is coupled to the mixer 18 and the compression module 14 for coupling the compressed multimedia signal into a modulated multimedia signal. The mixing output module MO converts the multimedia signal into an RF signal according to the associated channel and outputs the RF signal to the transmission medium. In this embodiment, the mixing output module MO includes a mixer 18 and a channel coupler 19, and the mixer 18 is coupled to the second processor 13 and the channel coupler 19, respectively, for The multimedia signal is turned into the corresponding The frequency band of the channel information forms an RF signal. The channel coupler 19 is coupled to the coaxial cable CL for carrying the RF signal to the coaxial cable CL. It should be noted that, as shown in FIG. 4A and FIG. 5 simultaneously, in the embodiment in which the control module CB is integrated in the transmission module TX, the coupler 45 can be integrated with the channel coupler 19.

Next, the manner in which the transmission module TX processes the first modulation signal from the control module CB will be described. When the transmitting module TX receives the first modulation control signal from the coaxial cable CL, the first modulation control signal is transmitted to the low pass filter 17, respectively. The first modulation control signal is filtered by the low pass filter 17 and then transmitted to the demodulator 15 and demodulated by the demodulator 15 to obtain the first control data CD. The second processor 13 can determine the manner of control according to the first control data CD. In an embodiment, if the first control data CD is to change the associated channel information, the control data may generally include a combination of each transmission module and corresponding channel information, so the second processor 13 may be based on the information. It is judged whether the current transmission module TX needs to change the channel information, and if so, a control command MC can be generated to the mixer 18 to control the mixer 18 to change the channel information. Once the channel information has been changed, the channel and frequency band corresponding to the modulation of the multimedia signal will also change. In another embodiment, if the first control data CD is time-scheduled, the second processor 13 controls the modulation module IMM to change the multimedia signal into an RF signal according to the time setting, or according to the time setting. , the control modulation module IMM changes the channel information. It should be noted that the change of the channel information mentioned above may be a multiple or periodic change or a one-time change. In addition, in another embodiment, the first control data CD may include display information DI, and the display information DI is transmitted to the synthesizer 12. After the synthesizer 12 receives the image data VD and the display information DI respectively, The synthesizer 12 superimposes the display information DI and the image data VD to form an overlay image signal and transmits it to the compression module 14. In fact, the display information DI may be a marquee text information or image information to be displayed on the image signal VD, such as a photo or an animation, but not limited thereto. After the compression module 14 receives the audio signal AD and the superimposed image signal, the compression module 14 compresses the audio signal AD and the superimposed image signal into a compressed multimedia signal and transmits the signal to the modulator 16. The modulator 16 converts the compressed multimedia signal into a modulated multimedia signal and transmits it to the mixer 18 for modulation to form an RF signal, which is then output to the coaxial cable CL via the channel coupler 19. To be explained, The first control data of the different aspects may also be combined, for example, the channel information of the change and the display information may be combined, so that the transmission module TX can simultaneously change the channel information and output the synthesized image. .

Please refer to FIG. 6. FIG. 6 is a diagram showing another embodiment of the transmission module TX in the distributed video control system. As shown in FIG. 6, the transmission module TX is basically similar to the fifth embodiment. The difference is that the transmission module TX in the embodiment has an audio-visual switching unit SW coupled to the second processor 13 and the audio-visual tone. The variable module IMM, the video switching unit SW receives a plurality of multimedia signal sources VI1~VI3. In the embodiment of the multi-signal source, the first modulation signal from the control module CB may include information for switching the source of the selected signal, that is, the first control data after decoding further includes a video source. Selecting the information, the second processor 13 converts the video source selection information into a selection signal SC to control the video switching unit SW to switch between the plurality of multimedia signal sources VI1 to VI3 to provide the multimedia signal corresponding to the selection signal. The source inputs its multimedia signal to the audio and video modulation module IMM. In this embodiment, after the selection signal SC controls the video switching unit SW to select one of the multimedia signal sources, the sound and video of the corresponding multimedia signal are decoded by the sound processor 10 and the image processor 11 to form an image. With the sound data, the subsequent processing actions are as described above, and will not be described herein. It should be noted that the transmission module TX shown in FIG. 5 and FIG. 6 may be the transmission module TX shown in FIG. 2A, 2B or 3A, 3B.

Next, different applications of the above-described distributed video and audio control system will be explained through different practical operating scenarios. Referring to FIGS. 7A and 7B, the first audio output device VO1 to the third video output device VO3 in the distributed video control system respectively play the first multimedia signal AV1 and the second multimedia signal AV2. The third multimedia signal AV3 and an embodiment of changing the channel. As shown in FIG. 7A, it is assumed that the channel information of the transmission module TX1 is corresponding to the first channel CH1, the channel information of the transmission module TX2 is corresponding to the second channel CH2, and the channel information of the transmission module TX3 is corresponding to the third. Channel CH3. Therefore, the first multimedia signal AV1 is carried by the transmission module TX1 to the frequency band corresponding to the first channel CH1 to form a first RF signal, and the second multimedia signal AV2 is carried by the corresponding transmission module TX2 to the corresponding second. The second RF signal is formed by the frequency band of the channel CH2, and the third multimedia signal AV3 is carried by the corresponding transmission module TX3. Corresponding to the frequency band of the third channel CH3 to form a third radio frequency signal. The control module CB sends different output control signals IR1~IR3 (including the first channel information to the third channel information respectively) to the first video output device VO1~the third video output device VO3 through wireless or wired mode, so as to control the first The audio and video output device VO1 to the third video output device VO3 respectively switch the display channel information of the video output devices VO1 to VO3 to the corresponding first channel CH1 to third channel CH3, and therefore, the first video output device VO1 to the third video output device The device VO3 can receive and play the first multimedia signal AV1, the second multimedia signal AV2 and the third multimedia signal AV3, respectively. It should be noted that although the receiving module RX is not shown in FIG. 7A, it is integrated in the video output devices VO1 to VO3.

In the case of FIG. 7A, if the display contents of the video output devices VO1 to VO3 are to be changed, for example, the video output device VO1 displays the multimedia signal AV3, the video output device VO2 displays the multimedia signal AV1, and the video output device VO3 displays the multimedia signal AV2. The control channel C3 can be used to generate the control signal IR3 to change the display channel information of the video output device VO1 to the corresponding CH3, change the display channel information of the video output device VO2 to the corresponding CH1, and change the display channel information of the video output device VO3 to the corresponding CH2. Therefore, the first video output device VO1 to the third video output device VO3 can respectively receive and play the third multimedia signal AV3, the first multimedia signal AV1 and the second multimedia signal AV2 to output corresponding multimedia information. .

In addition, it should be noted that, in addition to being controlled by the IR control command mode, in another embodiment, as shown in FIG. 7B, the control module CB can also utilize the second modulation control signal MS2 via the coaxial cable. The line CL is transmitted to the respective video output modules VO1 to VO3 to change the corresponding display channel information. In addition, in another embodiment, as shown in FIG. 7C, the control module CB may also output the first modulation control signal MS1 via the transmission medium, and have the channel information of the transmission module TX1 changed to the second channel. CH2, changing the channel information of the transmission module TX2 to the third channel CH3 and changing the channel information of the transmission module TX3 to the control data of the first channel CH1, so that the transmission modules TX1~TX3 are received at the far end. After the first modulation control signal MS1, demodulation is performed and the modulated channel can be changed according to the content of the changed channel. By adopting the method of FIG. 7C, the control module CB can directly control the transmission modules TX1~3 without controlling the channel replacement of the audio/video output device, and can also generate the audio output device VO1~VO3 to change and output. The effect of multimedia information.

It can be seen from FIG. 7A to FIG. 7C that the user can control each video output device or the transmission module to switch to different channels through the control module CB of the distributed video and audio control system of the present invention, so that the audio and video output devices can receive respectively. And play different multimedia signals that the user wants. Among them, the way to control the audio and video output device to change the channel is more to transmit the control signal through the coaxial cable or through the non-coaxial cable (for example, the infrared signal or the RS485 cable signal). In addition, when the first modulation control signal MS1 is used for control, the first modulation control signal MS1 can even frequency-modulate each multimedia signal according to the time schedule information through the control signal control transmission module TX including the time schedule information. To the different frequency bands corresponding to different channel information, the decentralized video and audio control system of the present invention can also realize the operation scenario of FIG. 7A at the first time according to the time scheduling function and realize the operation scenario of the 7th C diagram at the second time. To enhance the flexibility and convenience of the use of distributed video control systems.

Please refer to FIG. 8A. FIG. 8A illustrates an embodiment of implementing a video splitter using the distributed video and audio control system of the present invention. As shown in FIG. 8A, it is assumed that the channel information of the transmission module TX1 is corresponding to the first channel CH1, the channel information of the transmission module TX2 is corresponding to the second channel CH2, and the channel information of the transmission module TX3 is corresponding to the third. Channel CH3. Therefore, the first multimedia signal AV1 is carried by the transmission module TX1 to the frequency band corresponding to the first channel CH1 to form a first RF signal, and the second multimedia signal AV2 is carried by the corresponding transmission module TX2 to the corresponding second channel. The second RF signal is formed by the frequency band of CH2, and the third multimedia signal AV3 is carried by the corresponding transmission module TX3 to the frequency band corresponding to the third channel CH3 to form a third RF signal. If each of the video output devices VO1 to VO3 is to display an image of a specific channel, the multimedia information outputted by each of the video output devices VO1 to VO3 is matched to achieve the effect of video splitter display. The control module CB sends the same output control signal through wireless or wired mode, which includes a specific channel information, for example, the first channel (CH1) to the first video output device VO1 to the third video output device VO3, thereby controlling The display channel information of the receiving module in the first video output device VO1 to the third video output device VO3 is switched to the corresponding first channel CH1, and therefore, the first video output device VO1 to the third video output device VO3 Both the first multimedia signal AV1 will be received and played.

For the same reason, please refer to FIG. 8B, and FIG. 8B illustrates the use of the distributed method of the present invention. The video control system implements another embodiment of a video splitter. Different from the use of the IR control signal to control the switching channel shown in FIG. 8A, this embodiment uses the second modulation control signal MS2 to control each of the video output devices VO1 VO3 to switch to the same channel, so that each video and audio The output devices VO1~VO3 can display the same multimedia information to achieve the effect of image segmentation display. The principle is as described above and will not be described here. The transmission modules TX1 to TX3 shown in the foregoing 8A to 8B are effects of using the transmission module architecture of FIG. 5 to generate image segmentation, and in another embodiment, as shown in FIG. 8C, The transmission modules TX1~TX3 can adopt a transmission module architecture capable of receiving a plurality of multimedia signal sources as shown in FIG. 6. By using the transmission module architecture of FIG. 6 and the first modulation control signal MS1, the respective video output devices VO1 to VO3 can also produce image segmentation effects. In this embodiment, the first modulation signal MS1 has information for changing channels of each transmission module, and information for selecting a multimedia signal source. Therefore, when the transmission module TX1~TX3 receives the first modulation control signal, the corresponding multimedia signal source can be selected. For example, the multimedia signal AV3 is selected in this embodiment. At the same time, the transmission module TX1~TX3 changes the channel information according to the information set by the channel. For example, in this embodiment, the transmission module TX1 selects the first channel CH1, and the transmission module TX2 selects the second channel TX2 and the transmission mode. Group TX3 selects the third channel TX3. Finally, the control module CB sets the display channel of the receiving module RX in the video output device VO1~VO3 through the IR signal or the second modulation control signal, for example, the video output device VO1 is set to the first channel. The CH1, video output device VO2 is set to the second channel CH2, and the video output device VO3 is set to the third channel CH3. In this way, the video output devices VO1~VO3 can output the same multimedia information, and the effect of image segmentation can be produced.

Comparing FIGS. 8A to 8C, the user can control each video output device to switch to the same channel through the control module CB of the distributed video control system of the present invention, so that each video output device can simultaneously receive and play the user's wish. The same multimedia signal is required, so that it can achieve the function of a multimedia signal splitter (Splitter), which can be applied to a TV sales area of a hypermarket or other places where audio and video broadcasting is required.

In summary, the distributed video and audio control system of the present invention does not need to specifically design the receiving end, and the control module can be set at any position and perform video switching scheduling planning and control, and can also be equipped with infrared control for channel selection control and instant. Ordering a transmitter to display a horse race The light message, together with the coaxial cable that has been set up, communicates with the transmitting end without additional wiring or network equipment, which can effectively improve the shortcomings of the prior art and greatly increase the use of the distributed video and audio control system. Flexibility and convenience.

Another embodiment of the present invention is a decentralized video and audio control method. In this embodiment, the distributed video and audio control method is applied to a distributed video and audio control system, such as the architecture shown in the foregoing 2A, 2B, 3A or 3B. The control method includes the following steps: firstly providing at least one control module, at least one receiving module, and at least one transmission module, which are respectively coupled to each other by a transmission medium, and each transmission module has a corresponding channel Information, each receiving module has a display channel information. Then, the at least one transmission module respectively converts a multimedia signal into an RF signal according to the associated channel and outputs the RF signal to the transmission medium. Then, the at least one receiving module receives at least one radio frequency signal from the transmission medium, and each receiving module selects a corresponding radio frequency signal according to the display channel information, and restores the radio frequency signal to a corresponding multimedia signal. Finally, at least one of the control modules is selected to generate a modulation control signal for changing display channel information of at least one of the receiving modules or controlling at least one of the transmission modules. The controlling the transmission module includes controlling the transmission module to change the channel information of the transmission module, setting the time schedule, increasing the image signal superimposed on the multimedia signal in the display signal to form the superimposed image information or controlling the transmission module. Choose one of a plurality of audio and video sources.

Please refer to FIG. 9A. FIG. 9A is a flow chart showing the distributed video and audio control method in this embodiment. The distributed video and audio control system includes a transmission medium, a control module, and a transmission module. As shown in FIG. 9, in step S10, the control module generates a modulation control signal to the transmission medium. In step S12, the transmission module receives the multimedia signal and receives the modulation control signal from the transmission medium. In step S14, the transmission module further receives the modulation control signal via the transmission medium, and demodulates the modulation control signal into a control command for controlling the content of the RF signal. It should be noted that the content of the RF signal includes the channel information corresponding to the RF signal, or the content of the multimedia signal. For example, in an embodiment, the image signal and the control command in the multimedia signal are included in the message. The display information is superimposed to form a new multimedia signal. In addition, in another embodiment, since the control command includes a selection signal for selecting different multimedia signal sources, the content of the multimedia signal in the RF signal can be changed, and the same is also Change the aspect of the RF signal content.

Please refer to FIG. 9B, which is a flow chart of the distributed video and audio control method of the present invention. In this embodiment, an embodiment of an operation flow in which the corresponding control module is disposed in the receiving module, for example, the structures of the 3A and 3B, in the embodiment, may be first set in the receiving mode in step S10a. The control module in the group generates a modulation control signal; then in step S12a, the transmission module receives the multimedia signal and simultaneously receives the modulation control signal from the transmission medium. Then, in step S14a, the transmission module demodulates the modulation control signal to obtain a control command, and according to the control command, the multimedia signal is modulated into an RF signal and transmitted to the transmission medium. In step S16a, the receiving module receives the RF signal and restores the RF signal to a corresponding multimedia signal output.

Next, please refer to FIG. 10, which shows the sub-steps included in step S10 or S10a in FIG. 9A or 9B. As shown in FIG. 10, in step S100, the control module receives and transmits an input signal. In step S102, the control module generates the first control data and/or the second control data according to the input signal. The first control data includes channel information. Next, the method performs step S103, and determines that the first control data, the second control data, or the first control data and the second control data are generated in step S102. If the first control data is generated in step S102, the method performs step S104, and the first control data is modulated into a modulation signal and transmitted through the transmission medium. If the second control data is generated in step S102, the method performs step S106 to convert the second control data into another control signal. If the first control data and the second control data are generated in step S102, the method performs step S108, the first control data is modulated into a modulation signal and transmitted through the transmission medium, and the second control data is converted into another Control signal.

In addition, please refer to FIG. 11, which shows the sub-steps included in step S14 or S14a in FIG. 9A or 9B. As shown in FIG. 11, in step S140, the transmission module demodulates the variable modulation control signal to obtain the first control data. In step S142, the transmission module provides a control signal according to the channel information of the first control data. In step S144, the transmission module frequency-modulates the multimedia signal to the frequency band corresponding to the channel information according to the channel information contained in the control signal to form an RF signal and output the signal to the transmission medium.

Compared with the prior art, the distributed video and audio control system and the minute according to the present invention The distributed video and audio control method has the following advantages:

(1) Decentralized setting, suitable for long-distance transmission, and no need to specially design the receiving end RX.

(2) The control module can be set at any position without the need to control at the transmitting end TX.

(3) The control module can perform video switching schedule planning and control, and immediately order a transmitter TX to display the marquee message.

(4) The control module can be matched with infrared rays to perform channel selection control of the display of the receiving end RX.

(5) Communicate with the transmitting terminal TX by using the coaxial cable that has been set up, without adding additional lines or network equipment.

(6) The control module also has the characteristics of multi-point setting.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

2‧‧‧Distributed audio and video control system

VI‧‧‧Video source device

TX‧‧‧Transmission Module

CL‧‧‧ coaxial cable

CB‧‧‧Control Module

VO‧‧‧ audio output device

OM‧‧‧ output module

Claims (37)

A decentralized video and audio control system includes: at least one control module for generating a first modulation control signal transmitted via a transmission medium; and at least one transmission module coupled to the control module, each Each of the transmission modules has a channel information, and a multimedia signal is converted into an RF signal according to the channel to be output to the transmission medium, and each transmission module receives the first modulation control signal via the transmission medium. And demodulating the first modulation control signal into a control command and executing the control command; one of the control modules is integrated into one of the transmission modules. The distributed video control system according to claim 1, wherein the control command includes a channel information, and the transmission module determines, according to the channel information, whether to update the channel information, or the control command further includes a time. Scheduling information to control the transmission module to frequency-modulate the multimedia signal to a frequency band corresponding to the channel information corresponding to the channel scheduling information, or the control command further includes a display information, the control command controls the transmission module to The display information is superimposed on the image signal contained in the multimedia signal, and the multimedia signal is frequency-modulated to a frequency band corresponding to the channel information to which the channel belongs. The distributed video control system of claim 1, further comprising at least one output module coupled to the transmission medium, each output module comprising: a receiving module having a display channel information, The receiving module has a demodulation module for selecting the RF signal corresponding to the display channel information and restoring the RF signal to the multimedia signal via the transmission medium; and a video output device and the receiving module The group is coupled to receive the multimedia signal, and output a corresponding video and audio message according to the multimedia signal; wherein the receiving module is independently disposed outside the audio output device or integrated in the audio and video output device, one of the control modes The group control the at least one receiving module to change its display channel information through a control command, the control command is selected to be a wired signal transmission, a wireless signal transmission, and a modulation signal transmitted through the transmission medium. one of them. The decentralized video and audio control system of claim 3, wherein each control module comprises: an input unit for receiving a user input to generate an input signal; and a processor coupled to the input unit For generating a first control data and/or a second control data according to the input signal, the second control data corresponding to a display channel information; a modulation module coupled to the processor for The first control data is modulated into the first modulation control signal and transmitted through the transmission medium; and a transmitter is coupled to the processor for converting the second control data into a wireless or wired control command. Passed to the receiving module of the at least one output module. The distributed video control system of claim 4, wherein the modulation module further converts the second control data into a second modulation control signal, and then transmits the control mode via the transmission medium. The group further includes: a demodulator for receiving and demodulating a second modulation control signal from another control module to transmit the demodulated signal to the processor; wherein the processor is The demodulated signal determines whether the display channel information is to be updated, and if so, the second control data corresponding to the demodulated signal is generated for the transmitter to be converted into a wireless or wired signal, and transmitted to the at least one output module. The receiving module is provided. The decentralized video and audio control system of claim 1, wherein the transmission module comprises: a demodulation device for receiving the modulation control signal transmitted via the transmission medium, and demodulating the modulation Controlling the signal to obtain a first control data; a processor coupled to the demodulator for providing the control command according to the first control data; and a video tone modulation module for The multimedia signal is modulated into the RF signal and output to the transmission medium, and the AV modulation module is further connected. The control command is received to control the content of the RF signal. The decentralized video and audio control system of claim 6, wherein the audio and video modulation module further comprises: a compression module that compresses the multimedia signal to become a compressed multimedia signal; a modulator, and the compression The module is coupled to convert the compressed multimedia signal into a modulated multimedia signal, and a mixing output module, wherein the modulated multimedia signal is converted into an RF signal according to the associated channel information and output to the transmission medium. The mixing output module further updates the channel information according to the channel information contained in the control command. The decentralized video and audio control system of claim 7, wherein the control command further includes a display information, the transmission module further comprising: a synthesizer coupled to the processor and the compression module for Receiving the display information and superimposing the display information with the image signal in the multimedia signal and inputting to the compression module. The distributed video control system of claim 6, wherein the transmission module further comprises a video switching unit coupled to the processor and the audio and video modulation module, the video switching unit receiving the plurality of multimedia signals source. The decentralized video and audio control system of claim 9, wherein the control command further includes a video source selection information, the processor converting the video source selection information into a selection signal to control the video switching unit in the plurality The multimedia signal sources are switched to provide the multimedia signal source corresponding to the selection signal to input its multimedia signal to the video tone modulation module. A decentralized video and audio control system includes: at least one control module coupled to a transmission medium, each control module generating a first modulation control signal to the transmission medium; and at least one receiving module, respectively Having a display channel information, each receiving module is coupled to the transmission medium and receives at least one RF signal, each receiving module Selecting a corresponding RF signal according to the display channel information, and reducing the RF signal to a corresponding multimedia signal, each receiving module receiving the first modulation control signal through the transmission medium, and the first modulation control The signal demodulation is restored to a first control command, and according to the first control command, whether to update the displayed channel information is determined. The decentralized video and audio control system of claim 11, wherein the receiving module further comprises: a demodulation device for receiving the first modulation control signal transmitted through the transmission medium, and solving Adjusting the modulation control signal to obtain a first control data; a processor coupled to the demodulation device for determining whether to update the displayed channel information according to the first control data, and if yes, providing the first a control command; a demodulation module for receiving the RF signal via the transmission medium and restoring the RF signal to the multimedia signal and updating the displayed channel information according to the first control command. The distributed video control system of claim 11, wherein each control module comprises: an input unit for receiving a user input to generate an input signal; and a processor coupled to the input unit The first control data is generated according to the input signal, and the first control data corresponds to a channel information; a modulation module is coupled to the first processor to convert the first control data into The first modulation control signal is transmitted through the transmission medium; and a transmitter is coupled to the first processor, configured to convert the first control data into a wireless or wired control command, to the at least A receiving module. The decentralized video and audio control system of claim 13, wherein the control module further comprises: a demodulator for receiving and demodulating the first modulation control signal from the other control module. , to transmit the demodulated signal to the processor; The processor determines whether to update the display channel information according to the demodulated signal, and if so, generates the first control data corresponding to the demodulated signal to be converted into a wireless or wired control command by the transmitter. To the receiving module. For example, in the distributed video control system described in claim 14, one of the control modules further generates a second modulation control signal, and the distributed video control system further includes at least one transmission module, each transmission mode. The group has a channel information, each transmission module receives a multimedia signal, and the multimedia signal is frequency-modulated into a frequency signal corresponding to the frequency band of the channel information, and is output through the transmission medium, and each transmission module is evenly connected. The transmission medium receives the second modulation control signal and demodulates the second modulation control signal into a second control command. The distributed video control system of claim 15, wherein the second control command includes a channel information, and the transmission module determines, according to the channel information, whether to update the associated channel information or the second control command. And further comprising a time schedule information for controlling the transmission module to frequency-modulate the multimedia signal to the frequency band corresponding to the channel information according to the time schedule information, or the second control command further includes a display information, wherein the control command controls the The transmission module superimposes the display information on the image signal contained in the multimedia signal, and frequency-modulates the multimedia signal to a frequency band corresponding to the channel information to which the channel belongs. The decentralized video and audio control system of claim 16, wherein the transmission module comprises: a demodulation device for receiving the modulation control signal transmitted via the transmission medium, and demodulating the modulation Controlling the signal to obtain a second control data; a processor coupled to the demodulation device for providing a second control command according to the second control data; and a video tone modulation module for The channel adjusts the multimedia signal into the RF signal and outputs the signal to the transmission medium. The AV module further controls the content of the RF signal according to the second control command. The decentralized video and audio control system of claim 17, wherein the audio and video modulation module further comprises: a compression module, compressing the multimedia signal to become a compressed multimedia signal; a modulator coupled to the compression module for converting the compressed multimedia signal into a modulated multimedia signal; and a mixing output module for converting the multimedia signal into an RF signal according to the associated channel Outputting to the transmission medium, the mixing output module further updates the channel information according to the channel information contained in the second control command. The decentralized video and audio control system of claim 18, wherein the second control command further comprises display information, the audio tone modulation module further comprising: a synthesizer coupled to the processor and the compression mode The group is configured to receive the display information and superimpose the display information with the image signal in the multimedia signal and input to the compression module. The distributed video control system of claim 17, wherein the transmission module further comprises a video switching unit coupled to the processor and the audio and video modulation module, the video switching unit receiving the plurality of multimedia signals The second control command further includes a video source selection information, and the processor converts the video source selection information into a selection signal to control the video switching unit to switch between the plurality of multimedia signal sources to provide corresponding The multimedia signal source that selects the signal inputs its multimedia signal to the video tone modulation module. The distributed video and audio control system of claim 11, wherein each of the receiving modules is further coupled with a video output device for receiving the multimedia signal, and outputting a corresponding video and audio message according to the multimedia signal, wherein the The receiving module is independently disposed outside the audio output device or integrated in the audio output device. For example, in the distributed video control system described in claim 11, one of the control modules is integrated in one of the transmission modules. A distributed video and audio control method includes the following steps: providing at least one control module, at least one receiving module, and at least one transmission module, which are respectively coupled to each other by a transmission medium, and each of the transmission modules has one Each of the receiving modules has a display channel information; the at least one transmission module respectively converts a multimedia signal into an RF signal according to the associated channel and outputs the same to the transmission medium; Receiving, by the at least one receiving module, at least one radio frequency signal from the transmission medium, each receiving module selecting a corresponding radio frequency signal according to the display channel information, and reducing the radio frequency signal to a corresponding multimedia signal; and selecting At least one control module generates a modulation control signal for changing display channel information of at least one of the receiving modules or controlling at least one of the transmission modules; one of the control modules is integrated therein Within one of the transmission modules. The decentralized video and audio control method of claim 23, wherein controlling the at least one transmission module further comprises controlling the transmission module to update the associated channel information, and controlling the transmission module according to a time schedule information. The multimedia signal is frequency-modulated to a frequency band corresponding to the channel information of the channel, and the control module superimposes a display information on the image signal contained in the multimedia signal, and the frequency signal is frequency-modulated to a frequency band corresponding to the channel information of the channel, or It is a combination of at least two of the aforementioned control methods. A distributed video and audio control system includes: a plurality of transmission modules, and a plurality of receiving modules are coupled through a plurality of coaxial cables; each of the transmission modules frequency-modulates an audio-visual signal to correspond to a corresponding channel An RF signal of the information frequency band is output through the coaxial cable; each receiving module selects an RF signal corresponding to the channel according to the information of the displayed channel, and restores the associated RF signal to the corresponding audio and video signal. a receiving module, wherein a first control command and a second control command are respectively converted into a first modulation control signal and a second modulation control signal according to a user input interface, and output through the coaxial cable; The other receiving module receives the first modulation control signal through the coaxial cable, and demodulates the modulation control signal into the first control command, and determines whether to update the displayed channel information according to the first control command; The other transmission module receives the second modulation control signal through the coaxial cable, and demodulates the second modulation control signal into The second control commands, and Determining whether to update the associated channel information according to the second control command. The decentralized video and audio control system of claim 25, wherein each receiving module comprises: a demodulation module having the associated display channel information for receiving a corresponding display channel via the coaxial cable The RF signal of the information is used to restore the RF signal to a multimedia signal; an input unit having the user input interface for receiving a user input to generate an input signal; and a processor coupled to the input unit for Generating a first control command according to the input signal, the first control command corresponding to a channel information; a modulation module coupled to the first processor, configured to convert the first control command into the first tone Changing the control signal and transmitting the cable through the coaxial cable; and a demodulator for receiving the first modulation control signal from the other control module to restore it to the first of the other control modules Controlling the command and transmitting to the processor to decide whether to update the associated display channel information, outputting the first control command if there is the processor; and a transmitter to an internal Channel coupled to the processor and demodulator module for the first control command is transmitted to the demodulator module updates the channel information relevant to the display. The distributed video and audio control system of claim 25, wherein the second control command includes a channel information, and the transmission module determines whether to update the associated channel information according to the channel information. The decentralized video and audio control system of claim 25, wherein the second control command further includes a time schedule information to control the transmission module to frequency-modulate a multimedia signal according to the time schedule information. The frequency band of the channel information. The distributed video control system of claim 25, wherein the second control command further comprises a display information, the control command controlling the transmission module to superimpose the display information on the image contained in the multimedia signal. Signal and frequency-modulate the multimedia signal to the frequency band corresponding to the channel information. The distributed video and audio control system according to claim 25, wherein the The transmission module includes: a demodulation device for receiving the second modulation control signal transmitted through the coaxial cable, and demodulating the second modulation control signal to obtain a second control data; The demodulation device is coupled to provide a second control command according to the second control data, and a video tone modulation module configured to convert a multimedia signal into the RF signal according to the associated channel information and output To the coaxial cable, the AV module further controls the content of the RF signal according to the second control command. The decentralized video and audio control system of claim 30, wherein the audio and video modulation module further comprises: a compression module, compressing the multimedia signal to become a compressed multimedia signal; a modulator, and the compression The module is coupled to convert the compressed multimedia signal into a modulated multimedia signal; and a mixing output module is configured to convert the multimedia signal into an RF signal according to the associated channel and output the signal to the coaxial cable. The mixing output module further updates the associated channel information according to the channel information contained in the second control command. The decentralized video and audio control system of claim 30, wherein the second control command further comprises a display information, the video tone modulation module further comprising: a synthesizer coupled to the processor and the compression mode The group is configured to receive the display information and superimpose the display information with the image signal in the multimedia signal and input to the compression module. The distributed video control system of claim 30, wherein the transmission module further comprises a video switching unit coupled to the processor and the audio and video modulation module, the video switching unit receiving a plurality of multimedia signals The second control command further includes a video source selection information, and the processor converts the video source selection information into a selection signal to control the video switching unit to switch between the plurality of multimedia signal sources to provide corresponding The multimedia signal source that selects the signal inputs its multimedia signal to the video tone modulation module. The distributed video control system of claim 25, wherein each receiving module is further coupled with a video output device for receiving a multimedia signal, and outputting a corresponding video and audio message according to the multimedia signal, wherein the The receiving module is independently disposed outside the audio output device or integrated in the audio output device. A distributed video and audio control system includes: a plurality of transmission modules, and a plurality of receiving modules are coupled through a plurality of coaxial cables; each of the transmission modules frequency-modulates the associated video signals into corresponding channel information. The RF signal of the frequency band is output through the coaxial cable; each receiving module selects the RF signal corresponding to the channel according to the information of the displayed channel, and restores the RF signal to the corresponding audio and video signal; The module can convert a control command into a modulation control signal and output it through a coaxial cable according to a user input interface; and other receiving modules receive the modulation control signal through the coaxial cable, and The modulation control signal is demodulated and restored to the control command, and according to the control command, whether to update the channel information is determined. The decentralized video and audio control system of claim 35, wherein each receiving module comprises: a demodulation module having the associated display channel information for receiving a corresponding display channel via the coaxial cable The RF signal of the information is used to restore the RF signal to a multimedia signal; an input unit having the user input interface for receiving a user input to generate an input signal; and a processor coupled to the input unit for Generating the control command according to the input signal, the control command corresponding to a channel information; a modulation module coupled to the processor, configured to convert the control command into the modulation control signal, and then via the coaxial cable Outgoing; and a demodulator for receiving modulation control signals from other control modules to Reverting to a control command from another control module to the processor to determine whether to update the associated display channel information, if so, the processor outputs the control command; and a transmitter, an internal line and the processor and the The demodulation module is coupled to transmit the control command to the demodulation module to update the displayed display channel information. The decentralized video and audio control system of claim 35, wherein each of the receiving modules is further coupled with a video output device for receiving a multimedia signal and outputting a corresponding video and audio message according to the multimedia signal, wherein the The receiving module is independently disposed outside the audio output device or integrated in the audio output device.