CN101706675B - High standard-definition video-audio IO card with internal switching function - Google Patents

Abstract

The invention relates to a high standard-definition video-audio IO card with an internal switching function. The high standard-definition video-audio IO card comprises a plurality of video-audio input ports and a plurality of video-audio output ports, wherein each input port is connected with a respective interface conversion chip of SDI input signals, the video-audio output ports are connected with respective SDI output driving chips, and the interface conversion chip of each SDI input signal and the SDI output driving chips are connected with a field programmable logic chip. Through the configuration of an internal switching mode, the high standard-definition video-audio IO card can achieve simultaneous acquisition of various videos with different resolution ratios on the videos input from the outside in one or more forms, achieve simultaneous broadcasting of various videos with different resolution ratios on the videos output by software in one or more forms, achieve aliasing of a plurality of paths of the videos input from the outside and a plurality of paths of the videos broadcast by the software, and achieve the functions of switching the videos and the audios input from the outside and the videos and the audios output by the software and the like. The high standard-definition video-audio IO card can be widely used in various types of devices of broadcasting television high standard-definition production and broadcasting processes.

Description

A kind of high standard-definition video-audio IO card with internal switching function

Technical field

The present invention relates to a kind of high standard-definition video-audio IO card with internal switching function, is a kind of electronic installation, is a kind of IO interface card that is installed on the expanded slot of computer.It is a kind of interface card be used to looking the audio frequency processing.

Background technology

The history of technical development of computer also is the history of broadcast television industry equipment development.Raising along with computer hardware performance and software engineering level, video effect and coding and decoding video algorithm can be finished by software, the combination of computing machine+look audio frequency IO card+software becomes rapidly the main flow framework of the radio and television equipments such as non-volume, captions, picture and text, and include, the main flow framework of the video server product such as broadcast.The opening of computer platform, CPU and GPU(high-performance video card) the continuous lifting of processing power, the extensibility of software be so that be highly susceptible to increasing new characteristic, be easy to increase the differentiation design, and finally be easy to upgrading based on the equipment of this framework.But in such radio and television equipment framework, general computing machine does not have the signaling interface that needs in the radio and television equipment, only has by look audio frequency process software and other equipment that audio frequency IO integrated circuit board could will run on the computing machine of looking of special use and sets up and contact.Wherein look audio frequency IO integrated circuit board and receive the control command of looking the audio frequency process software by driver, carry out data interaction with it; Look simultaneously audio frequency IO integrated circuit board the signaling interface of broadcast television industry special use is provided, to carry out signal mutual with extraneous other equipment.Thus, all converge to depending on the signal of the data of audio frequency process software and external unit and to look in the audio frequency IO integrated circuit board, by carry out certain processing in integrated circuit board, the two has been realized alternately.Can think, be one of core component of this large class broadcasting and TV equipment depending on audio frequency IO integrated circuit board, and its function, quality and index also are one of central factors that determines the final competitiveness of radio and television equipment.

The at present common audio frequency IO integrated circuit board inter-process pattern of looking all comparatively simple and fixing, between software broadcast port and IO integrated circuit board signal output port, exist fixing corresponding relation, between software collection port and IO integrated circuit board signal input port, also only have fixing corresponding relation, usually can be subdivided into three kinds of common types.The integrated circuit board of the first type is after the video/audio of software broadcast port is sent on the IO integrated circuit board, directly by the corresponding signal output port output of determining; After perhaps the IO integrated circuit board receives the video/audio signal of external unit by signal input port, directly be sent to the corresponding software collection port of determining.The integrated circuit board of the second type is on the basis of the first type, the inner high definition down-conversion block that increases, after the video/audio of software broadcast port is sent on the IO integrated circuit board, directly by the corresponding signal output port output of determining, if being the high definition standard, video/audio also needs by changing the SD standard into after the processing of high definition down-conversion block, simultaneously by another corresponding definite signal port output.The integrated circuit board of the third type is on the basis of the first type, inside has increased the video superimpose module, after the video/audio of two broadcast ports of software is sent on the IO integrated circuit board, be mixed into one tunnel vision signal by the video superimpose module, the signal port output of determining by a correspondence again.These are looked audio frequency IO integrated circuit board and can be used in more specific type broadcasting and TV equipment, but some function in the device design can be subject to the integrated circuit board restriction and (for example: gather when can not realize multiple different resolution video to the video of outside input can't realize, broadcast when can not realize multiple different resolution video to the video of software output etc.), some can be realized by the dissimilar integrated circuit board of polylith is installed in a main frame, but but such problems such as precise synchronization that are faced with video/audio signal between integrated circuit board.

Summary of the invention

For solving the problem of prior art, the objective of the invention is to propose a kind of high standard-definition video-audio IO card with internal switching function.The present invention is comprised of the integrated circuit board hardware of looking audio frequency IO integrated circuit board and drive software two large divisions.During work, the integrated circuit board hardware installation is in the bus slot of computer platform, and drive software operates in the operating system of computing machine.Integrated circuit board hardware has comprised the interface of the special-purpose video/audio signal of multi-channel radio and television, and it is mutual that responsible and external unit carries out signal.Drive software with specifically look voice applications software and be connected, receive the control command of looking voice applications software, and look voice applications software and carry out data interaction.Drive software is connected with integrated circuit board hardware on being installed in the computer bus slot by the management of computer operating system.

The object of the present invention is achieved like this: a kind of high standard-definition video-audio IO card with internal switching function, comprise: a plurality of audio input port and a plurality of audio output ports of looking looked, each input port or output port comprise SDI, HDMI, analog video, the signal type port of AES/EBU audio frequency and analogue audio frequency, described a plurality of each SDI input port of looking in the audio input port is connected with separately SDI input signal interface conversion chip, each HDMI input port is connected with separately HDMI video/audio signal receiving chip, each analog video input port is connected with separately analog video signal receiving chip, described a plurality of each SDI output port of looking in the audio output port drives chip with separately SDI output and is connected, each HDMI output port is connected with separately HDMI video/audio signal generating chip, each analog video output port is connected with separately analog video signal generating chip, described a plurality of audio input port of looking is looked all AES/EBU audio ports in the audio output port and all receive to be sent chip with the AES/EBU sound signal and be connected with being connected, described a plurality of all analogue audio frequency input ports of looking audio input port all are connected with multi-channel analog sound signal receiving chip, described a plurality of all analogue audio frequency output ports of looking audio output port all are connected with multi-channel analog sound signal generating chip, described each SDI input signal interface conversion chip, HDMI video/audio signal receiving chip, analog video signal receiving chip and SDI output drive chip, HDMI video/audio signal generating chip, analog video signal generating chip and AES/EBU sound signal receive and send chip, multi-channel analog sound signal receiving chip, multi-channel analog sound signal generating chip is connected with the field programmable logic chip, described field programmable logic chip and memory chip, clock chip, outer phase-locked chip, the integrated circuit board information storage chip, the integrated circuit board power supply chip, computer bus interface connects;

Described field programmable logic chip: be the core processing unit on the OI card, be used for the function realizations such as standard identification, standard coding, audio frequency embedding, audio frequency de-embedding, the processing of looking audio frequency, the buffer management of looking audio frequency, computer bus interface management, control command parsing of outside video/audio signal; The described processing of looking audio frequency comprises: video scaling, video aliasing, video switch;

Described computer bus interface, the bus receiver that is used for transmitting the bus transmission link of data from drive software to IO card hardware and transmits data from IO card hardware to the IO card software;

Described memory chip is used for outside video/audio signal and software collection and broadcasts the mutual buffer zone of video/audio;

Described clock chip is used for the clock that the operation of IO card needs;

Described outer phase-locked chip is used for making IO card hardware effort in the pattern of a lock external input signal;

Described SDI input signal interface conversion chip: be the bridge that the SDI input signal enters the field programmable logic chip;

Described SDI output drives chip: be used for the video/audio signal of field programmable logic chip output is converted to the sdi signal that meets the external unit standard;

Described AES/EBU sound signal receives and sends chip: the bridge that is AES/EBU audio frequency input/output signal turnover field programmable logic chip;

Described analog video signal generating chip: be used for the video data stream of field programmable logic chip output is converted to analog video signal, export by the analog video signal output port;

Described analog video signal receiving chip: be used for that the analog video signal that the analog video signal input port is inputted is converted to video data stream and enter the field programmable logic chip;

Described HDMI video/audio signal generating chip: be used for the video/audio data flow of field programmable logic chip output is converted to the HDMI vision signal, export by the HDMI signal output port;

Described HDMI video/audio signal receiving chip: be used for that the HDMI video/audio signal that the HDMI signal input port is inputted is converted to video/audio data flow and enter the field programmable logic chip;

Described multi-channel analog sound signal generating chip: be used for the multi-path audio-frequency data circulation of field programmable logic chip output is changed to the multi-channel analog sound signal, export by the simulated audio signal output port;

Described multi-channel analog sound signal receiving chip: be used for that the multi-channel analog sound signal that the simulated audio signal input port is inputted is converted to multi-path audio-frequency data and flow to into the field programmable logic chip;

Described integrated circuit board information storage chip: the essential information that is used for the storage integrated circuit board;

Described integrated circuit board power supply chip is used for the power supply of IO card.

A kind of high standard definition that uses above-mentioned IO card is looked the changing method of audio frequency, comprise in the common system that forms of described each chip of IO card and drive software: a plurality of broadcast FPDP unit, described a plurality of broadcast FPDP unit and bus send link connection, described bus sends link and is connected with buffering Buffer, and described buffering Buffer is connected with central processing unit; Described buffering Buffer is connected with the audio frequency embedded unit with a plurality of audio mode codings of looking, described each looked audio mode coding and audio frequency embedded unit and is connected with separately signal transmitting unit, and described a plurality of signal transmitting units are connected with a plurality of signal output ports unit; A plurality of signal input ports unit, described a plurality of signal input ports unit is connected with separately signal receiving unit, each signal receiving unit is connected with the video formats recognition unit with separately video/audio separative element, described video formats recognition unit is connected with the video/audio separative element, described video/audio separative element is connected with described buffering Buffer, described buffering Buffer is connected with the bus receiver, and described bus receiver is connected with a plurality of image data port units; Described each broadcasts the FPDP unit, bus sends link, buffering Buffer, central processing unit, each looks audio mode coding and audio frequency embedded unit, each signal transmitting unit, each signal output port unit, each signal input port unit, each signal receiving unit, each video/audio separative element, each video formats recognition unit, the bus receiver, the image data port unit is connected with the steering logic resolution unit, is provided with a plurality of video sealer in the described central processing unit, aliasing device switching matrix, a plurality of aliasing devices, main switching matrix; The step of described method is as follows:

The step that steering logic is resolved: be used for receiving control command and the parsing that application software sends, the signal input output end mouth is configured, video formats coding and audio frequency are embedded circuit to be configured, queue mechanism to impact damper is controlled, and the operational mode of CPU (central processing unit) is arranged; Receive the status information of signal receiving unit, video formats recognition unit, signal transmitting unit, the queue state information of reception buffer, receive the status information of central processing unit, receive the status information that bus sends link and bus receiver, send back application software, enter " step that enters buffering Buffer " after this step is finished;

Below three steps sequentially with " step that steering logic is resolved " parallel carrying out:

Receive the step of outside video/audio signal: be used for receiving external unit and be connected to the physics electric signal of looking on the audio frequency IO card, and these physics electric signal are converted to video/audio data flow;

The step of signaling mode identification: resolve receiving in the video/audio data flow that receives in the outside video/audio signal step video data stream, identify the video formats of the described broadcast television industry standard code of this video data stream;

The step that video and audio signal separates: be used for isolating voice data from the video/audio data flow that SDI or HDMI signal input port receive.In this step, determine that according to the steering logic analyzing step video signal port type and the audio signal port type selecting selected need video data stream to be processed, audio data stream or video/audio data flow subsequently.After finishing, this step enters " step that enters buffering Buffer ";

Below two steps sequentially with " step that steering logic is resolved " parallel carrying out:

Receive application software and broadcast the step of looking audio frequency: be used for receiving the video/audio data flow that application software is broadcasted by broadcasting FPDP, and be stored in the corresponding ports formation in the drive software;

Video/audio sends the step of link transmission by bus: the video/audio data flow that is used for being stored in the port queue of drive software sends link by bus and is sent to buffering Buffer in the integrated circuit board hardware, enters " step that enters buffering Buffer " after this step is finished;

Enter the step of buffering Buffer: be used in buffering Buffer corresponding to each FPDP and each signal port, all set up corresponding buffer queue, the video/audio data flow that derives from signal input port is stored in each self-corresponding buffer queue with the video/audio data flow that derives from the broadcast FPDP;

The step that central processing unit is processed: be used for central processing unit and take out corresponding video/audio data flow from signal input data queue and the broadcast data queue that cushions Buffer, in central processing unit, each data stream is carried out independent video scaling processing, the processing of video aliasing, video switch processing, and video scaling is processed, the video aliasing is processed, the hybrid processing of video switch processing; And result sent back among the buffering Buffer corresponding to the formation of signal output port or corresponding to the formation of image data port;

Be embedded into step in the video data stream depending on audio mode coding and audio frequency: be used for taking out the video/audio data flow of processing through central processing unit from buffering Buffer corresponding to the formation of signal output port, coding generates the video/audio data flow of radio and television video standard specifies, uses simultaneously the audio frequency embedded technology that audio data stream is merged in the video data stream;

Send the step of video/audio signal: the video/audio data flow after being used for encoding is converted to the physics electric signal that meets the equipment room interactive standards and is sent to signal output port;

Below two steps run parallel with " being embedded into step in the video data stream depending on audio mode coding and audio frequency ", " sending the step of video/audio signal " sequentially:

Video/audio is by the step of bus receiver transmission: be used for taking out the video/audio data flow of crossing through central processing unit for processing from buffering Buffer corresponding to the formation of image data port, be sent to by the computer bus receiver in the formation of corresponding image data port of drive software;

Application software receives the step that gathers video/audio: be used for application software is taken out the formation of the corresponding image data port that is stored in drive software by the image data port video/audio data flow.

The beneficial effect that the present invention produces is: the present invention is by the configuration for inner switch mode, and the multi-channel video that gathers when can realize multiple different resolution video to one or more standard videos of outside input, broadcasts when one or more standard videos of software output are realized multiple different resolution video, multi-channel video and the software of outside input is broadcasted realizes aliasing, to the function such as look that audio frequency switches of looking audio frequency and software exports of outside input.Can be widely used in all types of equipment of radio and television high standard definition record and broadcast flow process.Use the present invention radio and television can be made to need in the playing flow path function that multiple devices finish such as non-linear editing, film titler, video server, switch, high definition SD look audio mode transducer, the mixed device of key etc. as required selectively design in an equipment, thereby multiple devices before an equipment can substitute, greatly improved the working range that equipment uses, save equipment purchasing cost and the maintenance cost of the applying units such as TV station, have very high economic worth and application prospect.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is the embodiment of the invention one described a kind of high standard-definition video-audio IO card hardware configuration synoptic diagram with internal switching function;

Fig. 2 is the embodiment of the invention two described a kind of logical organization synoptic diagram with high standard-definition video-audio IO card of internal switching function;

Fig. 3 is the embodiment of the invention three described a kind of logical organization synoptic diagram with high standard-definition video-audio IO card central processing unit of internal switching function;

Fig. 4 is the logical organization synoptic diagram of aliasing device of the central processing unit of the described a kind of high standard-definition video-audio IO card with internal switching function of the embodiment of the invention three;

Fig. 5 is the embodiment of the invention four described a kind of operation logic block diagrams with high standard-definition video-audio IO card of internal switching function;

Fig. 6 is that the embodiment of the invention four described a kind of high standard-definition video-audio IO cards with internal switching function are inputted the principle of work block diagram of three road video/audios, the output of three road video/audio signals at three road video/audios, three road video/audio signals;

Fig. 7 is the embodiment of the invention five described a kind of high standard-definition video-audio IO cards with internal switching function are inputted the output of three road different systems video/audios at one road video/audio signal principle of work block diagram;

Fig. 8 is the embodiment of the invention five described a kind of high standard-definition video-audio IO cards with internal switching function are inputted the output of three road different systems vision signals at one road video/audio principle of work block diagram.

Embodiment

Embodiment one:

Present embodiment is a kind of high standard-definition video-audio IO card with internal switching function, and structure as shown in Figure 1.Present embodiment comprises: a plurality of audio input port and a plurality of audio output ports of looking looked, each input port or output port comprise SDI, HDMI, analog video, the signal type port of AES/EBU audio frequency and analogue audio frequency, described a plurality of each SDI input port of looking in the audio input port is connected with separately SDI input signal interface conversion chip, each HDMI input port is connected with separately HDMI video/audio signal receiving chip, each analog video input port is connected with separately analog video signal receiving chip, described a plurality of each SDI output port of looking in the audio output port drives chip with separately SDI output and is connected, each HDMI output port is connected with separately HDMI video/audio signal generating chip, each analog video output port is connected with separately analog video signal generating chip, described a plurality of audio input port of looking is looked all AES/EBU audio ports in the audio output port and all receive to be sent chip with the AES/EBU sound signal and be connected with being connected, described a plurality of all analogue audio frequency input ports of looking audio input port all are connected with multi-channel analog sound signal receiving chip, described a plurality of all analogue audio frequency output ports of looking audio output port all are connected with multi-channel analog sound signal generating chip, the interface conversion chip of described each SDI input signal, HDMI video/audio signal receiving chip, analog video signal receiving chip and SDI output drive chip, HDMI video/audio signal generating chip, analog video signal generating chip and AES/EBU sound signal receive and send chip, multi-channel analog sound signal receiving chip, multi-channel analog sound signal generating chip is connected with the field programmable logic chip, described field programmable logic chip and memory chip, clock chip, outer phase-locked chip, the integrated circuit board information storage chip, the integrated circuit board power supply chip, computer bus interface connects.

Present embodiment comprises a plurality of inputs, output port, three video/audio signal input port Video IN1, Video IN2, Video IN3 shown in Fig. 1, and three video/audio signal output port Video Out1, Video Out2, Video Out3.Each input port comprises the signal type input port of SDI, HDMI, analog video, AES/EBU audio frequency and analogue audio frequency, and each output port comprises the signal type output port of SDI, HDMI, analog video, AES/EBU audio frequency and analogue audio frequency.

Other main electronic chip type and function that present embodiment comprises are as follows:

FPGA: field programmable logic chip, concrete model is the V5 that Xilinx company produces, the core processing unit on the integrated circuit board, be responsible for outside video/audio signal standard identification, standard coding, audio frequency embedding, audio frequency de-embedding, look the functions realizations such as the processing (video scaling, video aliasing, video switch etc.) of audio frequency, the buffer management of looking audio frequency, computer bus interface management, control command parsing.

PCI-E Connector: the interface that integrated circuit board is connected with computer bus, follow the PCI-E bus standard of standard, be connected on the FPGA.The drive software function and the integrated circuit board hardware circuit function that run on the computer operating system link together by this bus.Comprise the bus transmission link that transmits data from drive software to integrated circuit board hardware and the bus receiver that transmits data from integrated circuit board hardware to integrated circuit board software on the function.

DDR2: memory chip is that outside video/audio signal and software collection broadcast the mutual buffer zone of video/audio.

Clock: the clock chip that the integrated circuit board operation needs.

Ref: outer phase-locked chip, integrated circuit board hardware can be operated in the pattern that is locked in external input signal.

EQ:SDI input signal interface conversion chip is the bridge that the SDI input signal enters fpga chip.

The DRV:SDI output signal drives chip, and the video/audio signal that fpga chip is exported is converted to the sdi signal that meets the external unit standard.

The AES/EBU:AES/EBU sound signal receives and sends chip.It is the bridge of AES/EBU audio frequency input/output signal turnover fpga chip.

Video Encoder: analog video signal generating chip.The video data stream of FPGA output is converted to analog video signal, exports by the analog video signal output port.

Video Decoder: analog video signal receiving chip.The analog video signal of analog video signal input port input is converted to video data stream enters fpga chip.

HDMI Transmitter:HDMI video/audio signal generating chip.The video/audio data flow of FPGA output is converted to the HDMI vision signal, exports by the HDMI signal output port.

HDMI Receiver:HDMI video/audio signal receiving chip.The HDMI video/audio signal of HDMI signal input port input is converted to video/audio data flow enters fpga chip.

Audio D/A: multi-channel analog sound signal generating chip.The multi-path audio-frequency data circulation of FPGA output is changed to the multi-channel analog sound signal, exports by the simulated audio signal output port.

Audio A/D: multi-channel analog sound signal receiving chip.The multi-channel analog sound signal of simulated audio signal input port input is converted to multi-path audio-frequency data to be flow to into fpga chip.

Flash: integrated circuit board information storage chip.The essential information that is used for the storage integrated circuit board is such as functional description, sequence number, production status etc.

Power: integrated circuit board power supply chip.

Embodiment two:

Present embodiment is the improvement of embodiment one, is the logic function refinement of embodiment one described board system, as shown in Figure 2.Comprise in the common system that forms of described each chip of IO card of present embodiment and drive software: a plurality of broadcast FPDP unit, described a plurality of broadcast FPDP unit and bus send link connection, described bus sends link and is connected with buffering Buffer, and described buffering Buffer is connected with central processing unit; Described buffering Buffer is connected with the audio frequency embedded unit with a plurality of audio mode codings of looking, described each looked audio mode coding and audio frequency embedded unit and is connected with separately signal transmitting unit, and described a plurality of signal transmitting units are connected with a plurality of signal output ports unit; A plurality of signal input ports unit, described a plurality of signal input ports unit is connected with separately signal receiving unit, each signal receiving unit is connected with the video formats recognition unit with separately video/audio separative element, described video formats recognition unit is connected with the video/audio separative element, described video/audio separative element is connected with described buffering Buffer, described buffering Buffer is connected with the bus receiver, and described bus receiver is connected with a plurality of image data port units; Described each broadcasts that FPDP unit, bus send link, buffering Buffer, central processing unit, each is looked the audio mode coding and is connected with the steering logic resolution unit with audio frequency embedded unit, each signal transmitting unit, each signal output port unit, each signal input port unit, each signal receiving unit, each video/audio separative element, each video formats recognition unit, bus receiver, image data port unit.

The described system of present embodiment these functional modules below logical organization has comprised:

The steering logic resolution unit: it is mutual that responsible and upper application software is carried out control command.The control command that receives application software also is sent to the integrated circuit board hardware circuit, uses circuit that control command is resolved, and mode of operation and the chip functions of integrated circuit board hardware is configured.Collect the status information of each several part in the integrated circuit board hardware circuit and be sent to application software.

Broadcast FPDP unit, image data port unit: this port unit of two types is responsible for realizing with upper application software the software interactive of video/audio, is referred to as the FPDP unit.Application program will gather/broadcast video/audio, all needs to realize data interaction by FPDP.Each FPDP unit comprises 2 circuit-switched data stream in the present embodiment, and one is picture and text (Graphics) data stream, and another one is key (Key) data stream.It is just meaningful to it should be noted that (Graphics) data stream of only having picture and text comprises voice data, and key (Key) data stream does not have voice data.FPDP is one group of function in realization, can be used the application software of looking audio frequency IO integrated circuit board and call.

Formation: consider that upper application software is when carrying out data interaction between FPDP unit and integrated circuit board hardware, the real-time of data is subject to operating system and bus transfer impact, also need to have at the entrance and exit place of FPDP unit a Buffer formation to be used as buffer memory.Formation is one group of computing machine region of memory by drive software control in realization.

Computer bus sends link, computer bus receiver: referred to as bus send link, the bus receiver is the passage that integrated circuit board hardware and drive software carry out data interaction.Broadcast FPDP unit sends to the data of broadcasting formation and finally sends link transmission to integrated circuit board hardware by bus; The data communication device of integrated circuit board hardware is crossed the bus receiver and is transferred in the collection formation, finally enters the image data port unit.

Signal output port unit, signal input port unit: general designation signal port unit, be used for sending or receiving electric signal, follow the relevant criterion of broadcast television industry video/audio signal.Each signal port is comprised of SDI video/audio signal port, HDMI video/audio signal port, analog video signal port, AES/EBU audio signal port, simulated audio signal port, may include only in some applications part signal port type wherein.Signal port can only to do signal mutual with external physical equipment, and application software can not directly to make data mutual with this generic port, correlation parameter can be set, the signal type of control port output, signal characteristic etc.

Signal receiving unit: be used for the physics electric signal of external world's input is converted to data stream.On circuit is realized, the sdi signal of extraneous input at first flows into the EQ chip, the HDMI video/audio signal of input at first flows into HDMI Receiver chip, the analog video signal of input at first flows into Video Decoder chip, the AES/EBU signal of input at first flows into AES/EBU and receives the transmission chip, and the simulated audio signal of input at first flows into Audio D/A chip.Above-mentioned these chips are tentatively sent into fpga chip after the conversion with the physics electric signal of input, generate parallel data stream in FPGA.

The video formats recognition unit: the analytic signal receiving circuit passes the data stream of coming, and automatically identifies its video formats, and the video formats that recognizes is delivered in the steering logic resolution unit.

Depending on the audio frequency separative element: for sdi signal port data stream or HDMI data stream, voice data is embedded in the video data, need to by audio frequency solution embedding technique the two be separated in this part.For video data stream and the audio data stream of other types, the two is independently naturally.Determine video signal port type and the corresponding parallel data stream of audio signal port type selecting of selecting and be sent to cushion among the Buffer according to the steering logic resolution unit subsequently.

Encode and the audio frequency embedded unit depending on audio mode: this element will cushion video data and the voice data taking-up that Buffer need to broadcast, coding becomes video formats normal data stream and the audio mode normal data stream that needs, and also audio data stream is embedded in the video data stream simultaneously.

Signal transmitting unit: on circuit is realized, at first will look the video data stream and the audio data stream that form after audio mode coding and audio frequency embed in FPGA inside and carry out pre-service, then output to DRV chip, HDMI Transmitter chip, Video Encoder chip, AES/EBU chip, the Audio D/A chip of fpga chip outside, formation meets the electric signal of radio and television standard, sends to external unit.

Buffering Buffer: realized by the circuit on the integrated circuit board hardware.In buffering Buffer, corresponding to each FPDP and each signal port, all set up corresponding buffer queue.The video/audio data flow that sends from each signal input port can be nonsynchronous, by the buffer queue mechanism in buffering Buffer all signal input video-voice frequency flows is carried out frame synchronization.And carrying out data interaction, integrated circuit board hardware and drive software undertaken by computer bus link, the real-time of data transmission is subject to the impact of operating system and the fluctuation of bus transfer efficient, and the buffer queue mechanism among the buffering Buffer can guarantee the real-time Data Transmission when operating system and the fluctuation of bus transfer efficient.Under the control of CPU (central processing unit), it is necessary that the buffer queue mechanism of buffering among the Buffer is processed for video scaling, and the operation of the hand-off process of a part also is based on buffer queue mechanism and carries out.

Central processing unit: be responsible for from the respective queue of buffering Buffer, taking out and respectively broadcast the data that data that FPDP sends and each signal input port send, determine the operational mode of selection according to the steering logic resolution unit, these data stream are carried out the processing such as video scaling, video aliasing, video switch, and result is sent back in the respective queue of buffering Buffer.This is the corn module of whole system, and all related Video processing operations all are to realize by the operational mode of this device being carried out the difference configuration among the present invention.

Embodiment three:

Present embodiment is the improvement of embodiment two, is that embodiment two is about the refinement of central processing unit, as shown in Figure 3.Be provided with a plurality of video sealer, aliasing device switching matrix, a plurality of aliasing device, main switching matrix in the described central processing unit of present embodiment.

The described central processing unit of present embodiment is from can be understood as in logic the video/audio signal switch of built-in video sealer and video aliasing device functional module, and this central processing unit only has the input/output data stream port with the interface of outside.Inner then be the network structure that the functional module of video sealer, video aliasing device, video switcher is combined into.

The function that realizes central processing unit on the integrated circuit board hardware can have three kinds of methods: embedded processing software; Pure hardware circuit; The pattern of the two mixing.

First method is namely at integrated circuit board design flush bonding processor circuit, need data stream to be processed be sent in the flush bonding processor, operation possesses the various softwares of looking the audio frequency processing capacity of CPU (central processing unit) in flush bonding processor simultaneously, uses pure software to finish all Processing tasks.

Second method is the hardware circuit in each functional module of integrated circuit board design, uses the form of pure hardware circuit to finish all Processing tasks.Hardware circuit can form with the chip portfolio with different special functions, also can use programmable logic chip such as FPGA or CPLD, realizes by the internal circuit of design programmable logic chip.

The third method is the mixture of dual mode, namely respectively realizes partial function with flush bonding processor software with hardware circuit.What the present invention adopted namely is this method.

Each functional module that regards to down central processing unit is illustrated.

Broadcast data stream: the data stream of broadcasting FPDP that derives from that will be stored in the buffering Buffer respective queue is taken out, and is conveyed into CPU (central processing unit).It is a kind of data stream input port.

Image data stream: the data stream that central processing unit for processing is complete is sent in the respective queue of buffering Buffer, is ultimately delivered to the image data port.It is a kind of data stream output port.

Input signal data stream: the data stream that derives from signal input port that will be stored in the buffering Buffer respective queue is taken out, and is conveyed into CPU (central processing unit).It is a kind of data stream input port.

Output signal data stream: the data stream that central processing unit for processing is complete is sent in the respective queue of buffering Buffer, is ultimately delivered to signal output port.It is a kind of data stream output port.

It should be noted that, image data stream and the broadcast data stream of present embodiment all comprise 2 circuit-switched data stream, and one is picture and text (Graphics) data stream, and another one is key (Key) data stream, certainly under some operational mode of integrated circuit board, it is invalid that a circuit-switched data stream may wherein be arranged; Input signal data stream and output signal data stream all only comprise circuit-switched data stream, and this circuit-switched data stream both can have been done picture and text (Graphics) data stream usefulness, also can do key (Key) data stream, and the data content during according to its actual motion is determined.It is just meaningful to it should be noted that (Graphics) data stream of only having picture and text comprises voice data, and key (Key) data stream does not have voice data.

Video sealer: be used for that the vision signal of the data stream of input is done convergent-divergent and process, perhaps be used for before the data stream of output.Traditional audio frequency IO integrated circuit board of looking, some inside also includes a HD video down-conversion block, and function class is similar to this video sealer, but can only realize high clear video image is converted to the SD video image.Video sealer in the present embodiment can provide the image scale transform of accurate arbitrary proportion in the vertical direction with horizontal direction, realize that high clear video image is converted to the conversion between the high clear video image that SD video image, SD video image be converted to high clear video image, different systems and high definition or SD video image be converted to the non-standard video image of arbitrary dimension, be that the amplification of the non-standard image/video of high definition or SD video image, arbitrary dimension is dwindled etc. with the non-standard video image transitions of arbitrary dimension.The parameter of scaler and function can dynamically be adjusted, and the operational mode of achieve frame precision changes.

The data stream of each input can be used the video sealer module that vision signal is made convergent-divergent and process, but in actual integrated circuit board hardware, the quantity of scaler is limited, arranged by application software when actual motion and dynamically the video sealer module is linked on the data flow path that needs to use, the video sealer quantity that every integrated circuit board can activate simultaneously can not surpass the video sealer number that comprises in the CPU (central processing unit).

Aliasing device switching matrix: enter into the video/audio data flow of CPU (central processing unit) when entering main switching matrix, the capital enters aliasing device switching matrix, according to the situation that requires that data is flow to the line aliasing processing, at first data stream is switched, and be sent to aliasing device module.

The aliasing device: each aliasing device module has two groups of inputs, and every group of input all comprises an image, text and data stream and a key (Key) data stream.The aliasing device is output as picture and text (Graphics) data stream and a key (Key) data stream, and these two data stream are connected on the main switching matrix at last.Select the source of input traffic by configuration aliasing device switching matrix, and dispose the aliasing pattern of aliasing device module, just can make aliasing to two groups of selected vision signals.Accompanying drawing 4 has been described the building-block of logic of aliasing device.

Main switching matrix: this matrix all links together the data stream of all inputs and the output stream of aliasing device, and can do switching.The data stream that main switching matrix input end connects comprises: input signal data stream, broadcast image, text and data stream and Key data stream in the data stream, and also have image, text and data stream and the Key data stream of aliasing device output.The data stream that main switching matrix output terminal connects comprises: output signal data stream, image, text and data stream and Key data stream in the image data stream.Dispose the connected mode of main switching matrix, the content source that each output terminal data stream only need to be set gets final product.

By disposing the connected mode of main switching matrix, some transmission paths have been created, so that video/audio signal arrives the named data stream output port from the named data stream input port.The configuration mode of main switching matrix has a variety of, flow such as 3 tunnel 3 tunnel image data that arrive respectively correspondence from input signal data stream, 1 road flowing to simultaneously and arrive 3 tunnel image data stream from input signal data stream, 3 tunnel 3 road output signal datas that arrive respectively correspondence from broadcast data stream flow, 1 road flowing to simultaneously and arrive 3 road output signal datas stream from broadcast data stream, flow to respectively arrival 6 road output signal datas stream etc. from the 3 circuit-switched data streams (comprising 3 road picture and text and 3 road keys) of aliasing device output, thereby realize looking the multiple-working mode of audio frequency IO card.

Embodiment four:

Present embodiment is a kind of changing method that uses the high standard definition video of the described IO card of the various embodiments described above, and the process block diagram as shown in Figure 5.The step of the described method of present embodiment is as follows:

The step that steering logic is resolved: be used for receiving control command and the parsing that application software sends, the signal input output end mouth is configured, be configured with audio frequency embedding circuit looking the audio mode coding, queue mechanism to impact damper is controlled, and the operational mode of CPU (central processing unit) is arranged; Receive the status information of signal receiving unit, video formats recognition unit, signal transmitting unit, the queue state information of reception buffer, receive the status information of central processing unit, receive the status information that bus sends link and bus receiver, send back application software, " enter the step of buffering Buffer " after this step is finished.This step is finished with the control command of upper application software mutual, and drive software and integrated circuit board hardware effort running status are carried out the chief coordinator.

Below three steps and " step that steering logic is resolved " parallel carrying out.

Receive the step of outside video/audio signal: be used for receiving external unit and be connected to the physics electric signal of looking on the audio frequency IO card, type comprises sdi signal, HDMI signal, analog video signal, AES/EBU digital audio and video signals, simulated audio signal, and these physics electric signal are converted to video/audio data flow.Only in this step, come into contacts with external device depending on audio frequency IO board system.

The step of signaling mode identification: resolve receiving the video data stream of selecting in the outside video/audio signal step, identify the video formats of the described broadcast television industry standard code of this video data stream.Automatically after the identification input video/audio signal standard, the steering logic resolution unit can be sent to application software with this status information, judges whether input video/audio signal standard meets system requirements, and judges whether to send warning message.The input video/audio signal of undesirable standard can be dropped, and does not enter follow-up processing flow.

The step that video and audio signal separates: the video data stream that is used for SDI or HDMI signal input port is isolated voice data, " enters the step of buffering Buffer " after this step is finished.Be the video data stream of sdi signal input port or HDMI signal input port for the source, voice data is embedded in the video data, need to by audio frequency solution embedding technique the two be separated in this step.For video data stream and the audio data stream of other types, the two is independently naturally.In this step, determine video signal port type and the corresponding parallel data stream of audio signal port type selecting of selecting and be sent to cushion among the Buffer according to the steering logic parsing module subsequently.

Below two steps and " step that steering logic is resolved " parallel carrying out.

Receive application software and broadcast the step of looking audio frequency: be used for receiving the video/audio data flow that application software is broadcasted by broadcasting FPDP, and be stored in the corresponding ports formation in the drive software.This is that application software is used the unique data interface of looking audio frequency IO integrated circuit board broadcast video/audio signal.

Video/audio sends the step of link transmission by bus: the video/audio data flow that is used for being stored in the port queue of drive software sends link by bus and is sent to buffering Buffer in the integrated circuit board hardware, " enters the step that cushions Buffer " this step is finished after.

Enter the step of buffering Buffer: be used in buffering Buffer corresponding to each FPDP and each signal port, all set up corresponding buffer queue, the video/audio data flow that derives from signal input port is stored in each self-corresponding buffer queue with the video/audio data flow that derives from the broadcast FPDP.Synchronous to all signal input video-voice frequency flow achieve frames by the buffer queue mechanism among the buffering Buffer.Can guarantee when operating system and the fluctuation of bus transfer efficient the data transmission real-time between drive software and integrated circuit board hardware by the buffer queue mechanism of buffering among the Buffer.Buffering Buffer mechanism is processed for video scaling and the hand-off process operation of a part also is necessary.

The step that central processing unit is processed: be used for central processing unit and take out corresponding video/audio data flow from signal input data queue and the broadcast data queue that cushions Buffer, in central processing unit, each data stream carried out that independent video scaling is processed, the video aliasing is processed, video switch is processed, and the hybrid processing of carrying out with several processing modules; And result sent back among the buffering Buffer corresponding to the formation of signal output port or corresponding to the formation of image data port.This is the core processing step of whole system.The function of central processing unit and treatment effect have determined whole quality of looking the function of audio frequency IO card.

Be embedded into step in the video data stream depending on audio mode coding and audio frequency: be used for taking out the video/audio data flow of processing through central processing unit from buffering Buffer corresponding to the formation of signal output port, coding generates the video/audio data flow of radio and television video standard specifies, uses simultaneously the audio frequency embedded technology that audio data stream is merged in the video data stream.

Send the step of video/audio signal: the video/audio data flow after being used for encoding is converted to the physics electric signal that meets the equipment room interactive standards, comprise sdi signal, HDMI signal, analog video signal, AES/EBU sound signal, simulated audio signal, be sent to signal output port.

Below two steps run parallel with " video/audio coding and audio frequency are embedded into the step in the video data stream " " sending step of video/audio signal ".

The step that video/audio transmits by the bus receiver: be used for taking out the video/audio data flow of crossing through central processing unit for processing from buffering Buffer corresponding to the formation of image data port, be sent to by the bus receiver in the corresponding image data port queue of drive software.

Application software receives the step that gathers video/audio: be used for application software is taken out the corresponding ports formation that is stored in drive software by the image data port video/audio data flow.This is that application software is used the unique data interface of looking audio frequency IO integrated circuit board collection video/audio signal.

Present embodiment can be realized the video aliasing of arbitrary proportion video scaling, two-way or the multiplex data stream of single channel or multiplex data stream, any handoff functionality between multiplex data stream by inner central processing unit, and the combination of above-mentioned functions.For the video/audio that broadcasts from any broadcast FPDP, and from the video/audio of arbitrary signal input port input, can in central processing unit, carry out separately video scaling, video aliasing, video switch or wherein any several combination function processing, be sent to image data port or the arbitrary signal output port of any needs.According to above description, when using that present embodiment is described looks audio frequency IO integrated circuit board, can be understood as is in an exchange network, has created some transmission paths, so that video/audio signal is from specifying input port through arriving the output port of appointment after the Video processing.

Present embodiment has 4 kinds of groundwork patterns.

Pattern one:

Input signal is 6 the tunnel: 3 and broadcasts video/audio and the transmission that FPDP receives application software that 3 signal input ports receive external unit physics electric signal and are converted to video/audio and transmit.6 road video/audio data flows are input to the formation of buffering Buffer, and central processing unit carries out hand-off process to 6 road video/audio data flows afterwards.6 tunnel video data streams after the processing send back the formation of buffering Buffer.3 image data ports are taken data away and are sent to application software from the respective queue of buffering Buffer.3 signal output ports are taken data away and are changed the physics electric signal into from the respective queue of buffering Buffer and are sent to external unit.

Pattern two:

The workflow basic simlarity of pattern two and pattern one, but in pattern two, what carry out for 6 road video/audio data flows in the central processing unit is that video scaling is processed and hand-off process.Central processing unit comprises 4 video sealer, can dynamic-configuration be used in the 6 circuit-switched data stream, each road in the stream of 4 circuit-switched data is wherein carried out the video scaling of arbitrary proportion and process, realize that the conversion, SD video image from high clear video image to the SD video image is scaled high definition that non-standard video image, non-standard video image scaling are a customized type or SD video image, non-standard video image arbitrary proportion convergent-divergent in any proportion to conversion, high definition or SD video image between the high clear video image of the conversion of high clear video image, different systems.Switch by the main switch of CPU (central processing unit) subsequently through the video scaling data stream of processing and the 2 circuit-switched data stream that does not process, send back again in the respective queue of buffering Buffer.

Two specific works states are arranged in pattern two, make in the playing flow path especially significant at the radio and television that present high definition SD standard is mixed.

Pattern three:

The workflow basic simlarity of pattern two and pattern one, but in pattern three at first is that the video aliasing that carries out is processed for 6 road video/audio data flows in the CPU (central processing unit).The 3 circuit-switched data stream that 6 road video/audio data flow aliasings form therewith 6 circuit-switched data stream enters main switch jointly, the respective queue of selecting the 6 circuit-switched data stream (including only one of image, text and data stream or key data stream) that flows corresponding to output signal data and the 3 circuit-switched data stream that flows corresponding to image data (every road all comprises image, text and data stream and two kinds of data of key data stream) to enter buffering Buffer.

Pattern four:

The workflow basic simlarity of pattern four and pattern one, but in pattern four, what carry out for 6 road video/audio data flows in the CPU (central processing unit) is the combination in any processing capacity of video scaling, video aliasing, hand-off process.6 circuit-switched data streams can be selected at first to carry out video scaling and be processed, then video aliasing and hand-off process; Perhaps 6 circuit-switched data stream directly carries out the processing of video aliasing, hand-off process, then carries out video scaling and processes; Perhaps the part in the 6 circuit-switched data stream is at first carried out the video scaling processing, then enter video aliasing module, again carry out hand-off process, select partial data stream to carry out again entering after convergent-divergent is processed buffering Buffer formation at last, partial data stream directly enters the Buffer formation after hand-off process.

What should be pointed out that present embodiment provides is several typical application model of the present invention, and the present invention is by suitable configuration, and the number of the data stream of input, output is changed, and also can realize easily other more application models.

Embodiment five:

Present embodiment is the refinement of embodiment four, is the refinement to several steps among the embodiment four, as shown in Figure 7.Take 1 road signal is switched or be separated into 2 the tunnel, the 3 tunnel 4 the road or more signals as example, the step of present embodiment step refinement is as follows:

Receive the step of outside 1 road video/audio signal: be used for receiving 1 road external unit and be connected to the physics electric signal of looking on the audio frequency IO card, and this 1 road physics electric signal is converted to video/audio data flow;

Central processing unit carries out 1 tunnel treatment step that switches to the multiple signals such as 2 tunnel, 3 tunnel, 4 tunnel, 5 tunnel: be used for central processing unit and take out corresponding video/audio data flow from the signal input data queue of buffering Buffer, in central processing unit to 1 circuit-switched data stream carry out that independent video scaling is processed, video switch is treated to 2 the tunnel, the 3 tunnel, the 4 road or multichannel different resolution signal more; And result sent back among the buffering Buffer corresponding to the formation of image data port;

Video/audio transmits 2 the tunnel, the 3 tunnel, the 4 road or the step of multichannel different systems video/audio data flow more by the bus receiver: be used for taking out through central processing unit for processing isolated 2 tunnel, 3 tunnel, 4 road or the video/audio data flow of multichannel different systems more corresponding to the formation of image data port from buffering Buffer, be sent to by the bus receiver in the corresponding image data port queue of drive software;

Application software receives the step that gathers video/audio: be used for application software is taken out the corresponding ports formation that is stored in drive software by 3 image data ports 2,3,4 or the video/audio data flow of more different systems.

Present embodiment is the first duty of the second mode of operation of embodiment four, and its workflow such as Fig. 7 describe.

Under this duty, system receives 1 road video/audio signal from signal input port, processes through the video sealer in the central processing unit and video switcher, forms the video/audio data flow of three road different systems, is sent to 3 image data ports.This duty exactly with 1 road video/audio signal that sends of external unit, is converted to the video/audio data flow of 3 road different systems on macroscopic view, be employed software collection.

Should be noted that, what present embodiment provided is several typical application model of the present invention, the present invention is by suitable configuration, can the number of image data stream and broadcast port be changed, also can realize easily other more application models, for example 1 road signal is switched to 2 the road or 4 the tunnel, or 1 circuit-switched data is separated into the video/audio data flow of 2 kinds or 4 kinds different systems.

Embodiment six:

Present embodiment is the refinement of embodiment four, is the refinement to several steps among the embodiment four, as shown in Figure 8.The step of present embodiment refinement is as follows:

Receive application software and broadcast 1 tunnel step of looking audio frequency: be used for receiving 1 road video/audio data flow that application software is broadcasted by broadcasting FPDP, and be stored in the corresponding ports formation in the drive software;

Central processing unit carries out 1 the tunnel and switches to 2 the tunnel, the 3 tunnel, the 4 road or the treatment step of multiple signals more: be used for central processing unit and take out corresponding video/audio data flow from the broadcast data queue of buffering Buffer, in central processing unit to 1 circuit-switched data stream carry out that independent video scaling is processed, video switch is treated to 2 the tunnel, the 3 tunnel, the 4 road or multiple signals more; And result sent back among the buffering Buffer corresponding to the formation of signal output port;

Send 2 the tunnel, the 3 tunnel, the 4 road or the step of the video/audio signal of multichannel different systems more: the video/audio data flow after being used for encoding be converted to 2 the tunnel, the 3 tunnel, the 4 road or more the multichannel different systems meet the physics electric signal of equipment room interactive standards and be sent to signal output port.

Workflow such as Fig. 8 of state 2 describe.

Under this duty, system receives the video/audio of 1 tunnel application software from broadcasting FPDP, process through the video scaling module in the CPU (central processing unit) and video frequency switching module, form the video/audio data flow of three road different systems, be sent to 2,3,4 or more signal output port.This duty is exactly 1 road video/audio data flow that application software is broadcasted on macroscopic view, be converted to 2 the tunnel, the 3 tunnel, the 4 road or more the video/audio signal of multichannel different systems broadcast.

It should be noted that at last, below only unrestricted in order to technical scheme of the present invention to be described, although with reference to the preferred arrangement scheme the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can to technical scheme of the present invention (such as the type of each chip, the setting of unit and layout arrangement, the data stream number of input and output, input/output port etc.) make amendment or be equal to replacement, and do not break away from the spirit and scope of technical solution of the present invention.

Claims (2)

1. high standard-definition video-audio IO card with internal switching function, it is characterized in that, comprise: a plurality of audio input port and a plurality of audio output ports of looking looked, each input port or output port comprise SDI, HDMI, analog video, the signal type port of AES/EBU audio frequency and analogue audio frequency, described a plurality of each SDI input port of looking in the audio input port is connected with separately SDI input signal interface conversion chip, each HDMI input port is connected with separately HDMI video/audio signal receiving chip, each analog video input port is connected with separately analog video signal receiving chip, described a plurality of each SDI output port of looking in the audio output port drives chip with separately SDI output and is connected, each HDMI output port is connected with separately HDMI video/audio signal generating chip, each analog video output port is connected with separately analog video signal generating chip, described a plurality of audio input port of looking is looked all AES/EBU audio ports in the audio output port and all receive to be sent chip with the AES/EBU sound signal and be connected with being connected, described a plurality of all analogue audio frequency input ports of looking audio input port all are connected with multi-channel analog sound signal receiving chip, described a plurality of all analogue audio frequency output ports of looking audio output port all are connected with multi-channel analog sound signal generating chip, described each SDI input signal interface conversion chip, HDMI video/audio signal receiving chip, analog video signal receiving chip and SDI output drive chip, HDMI video/audio signal generating chip, analog video signal generating chip and AES/EBU sound signal receive and send chip, multi-channel analog sound signal receiving chip, multi-channel analog sound signal generating chip is connected with the field programmable logic chip, described field programmable logic chip and memory chip, clock chip, outer phase-locked chip, the integrated circuit board information storage chip, the integrated circuit board power supply chip, computer bus interface connects;

Described field programmable logic chip: be the core processing unit on the IO card, be used for the function realizations such as standard identification, standard coding, audio frequency embedding, audio frequency de-embedding, the processing of looking audio frequency, the buffer management of looking audio frequency, computer bus interface management, control command parsing of outside video/audio signal; The described processing of looking audio frequency comprises: video scaling, video aliasing, video switch;

Described computer bus interface, the bus receiver that is used for transmitting the bus transmission link of data from drive software to IO card hardware and transmits data from IO card hardware to the IO card software;

Described memory chip is used for outside video/audio signal and software collection and broadcasts the mutual buffer zone of video/audio;

Described clock chip is used for the clock that the operation of IO card needs;

Described outer phase-locked chip is used for making IO card hardware effort in the pattern of a lock external input signal;

Described SDI input signal interface conversion chip: be the bridge that the SDI input signal enters the field programmable logic chip;

Described SDI output drives chip: be used for the video/audio signal of field programmable logic chip output is converted to the sdi signal that meets the external unit standard;

Described AES/EBU sound signal receives and sends chip: the bridge that is AES/EBU audio frequency input/output signal turnover field programmable logic chip;

Described analog video signal generating chip: be used for the video data stream of field programmable logic chip output is converted to analog video signal, export by the analog video signal output port;

Described analog video signal receiving chip: be used for that the analog video signal that the analog video signal input port is inputted is converted to video data stream and enter the field programmable logic chip;

Described HDMI video/audio signal generating chip: be used for the video/audio data flow of field programmable logic chip output is converted to the HDMI vision signal, export by the HDMI signal output port;

Described HDMI video/audio signal receiving chip: be used for that the HDMI video/audio signal that the HDMI signal input port is inputted is converted to video/audio data flow and enter the field programmable logic chip;

Described multi-channel analog sound signal generating chip: be used for the multi-path audio-frequency data circulation of field programmable logic chip output is changed to the multi-channel analog sound signal, export by the simulated audio signal output port;

Described multi-channel analog sound signal receiving chip: be used for that the multi-channel analog sound signal that the simulated audio signal input port is inputted is converted to multi-path audio-frequency data and flow to into the field programmable logic chip;

Described integrated circuit board information storage chip: the essential information that is used for the storage integrated circuit board;

Described integrated circuit board power supply chip is used for the power supply of IO card.

2. a right to use requires the high standard definition of 1 described IO card to look the changing method of audio frequency, comprise in the common system that forms of described each chip of IO card and drive software: a plurality of broadcast FPDP unit, described a plurality of broadcast FPDP unit and bus send link connection, described bus sends link and is connected with buffering Buffer, and described buffering Buffer is connected with central processing unit; Described buffering Buffer is connected with the audio frequency embedded unit with a plurality of audio mode codings of looking, described each looked audio mode coding and audio frequency embedded unit and is connected with separately signal transmitting unit, and described a plurality of signal transmitting units are connected with a plurality of signal output ports unit; A plurality of signal input ports unit, described a plurality of signal input ports unit is connected with separately signal receiving unit, each signal receiving unit is connected with the video formats recognition unit with separately video/audio separative element, described video formats recognition unit is connected with the video/audio separative element, described video/audio separative element is connected with described buffering Buffer, described buffering Buffer is connected with the bus receiver, and described bus receiver is connected with a plurality of image data port units; Described each broadcasts the FPDP unit, bus sends link, buffering Buffer, central processing unit, each looks audio mode coding and audio frequency embedded unit, each signal transmitting unit, each signal output port unit, each signal input port unit, each signal receiving unit, each video/audio separative element, each video formats recognition unit, the bus receiver, the image data port unit is connected with the steering logic resolution unit, is provided with a plurality of video sealer in the described central processing unit, aliasing device switching matrix, a plurality of aliasing devices, main switching matrix; The step that it is characterized in that described method is as follows:

The step that steering logic is resolved: be used for receiving control command and the parsing that application software sends, the signal input output end mouth is configured, be configured with audio frequency embedding circuit looking the audio mode coding, queue mechanism to impact damper is controlled, and the operational mode of CPU (central processing unit) is arranged; Receive the status information of signal receiving unit, video formats recognition unit, signal transmitting unit, the queue state information of reception buffer, receive the status information of central processing unit, receive the status information that bus sends link and bus receiver, send back application software, enter " step that enters buffering Buffer " after this step is finished;

Below three steps sequentially with " step that steering logic is resolved " parallel carrying out:

Receive the step of outside video/audio signal: be used for receiving external unit and be connected to the physics electric signal of looking on the audio frequency IO card, and these physics electric signal are converted to video/audio data flow;

The step of signaling mode identification: the video data stream that receives in the video/audio data flow that receives in the outside video/audio signal step is resolved, identify the video formats of the described broadcast television industry standard code of this video data stream;

The step that video and audio signal separates: be used for isolating voice data from the video/audio data flow that SDI or HDMI signal input port receive, in this step, determine that according to the steering logic analyzing step video signal port type and the audio signal port type selecting selected need video data stream to be processed, audio data stream or video/audio data flow, enter " step that enters buffering Buffer " after this step is finished subsequently;

Below two steps sequentially with " step that steering logic is resolved " parallel carrying out:

Receive application software and broadcast the step of looking audio frequency: be used for receiving the video/audio data flow that application software is broadcasted by broadcasting FPDP, and be stored in the corresponding ports formation in the drive software;

Video/audio sends the step of link transmission by bus: the video/audio data flow that is used for being stored in the port queue of drive software sends link by bus and is sent to buffering Buffer in the integrated circuit board hardware, enters " step that enters buffering Buffer " after this step is finished;

Enter the step of buffering Buffer: be used in buffering Buffer corresponding to each FPDP and each signal port, all set up corresponding buffer queue, the video/audio data flow that derives from signal input port is stored in each self-corresponding buffer queue with the video/audio data flow that derives from the broadcast FPDP;

The step that central processing unit is processed: be used for central processing unit and take out corresponding video/audio data flow from signal input data queue and the broadcast data queue that cushions Buffer, in central processing unit, each data stream is carried out independent video scaling processing, the processing of video aliasing, video switch processing, and video scaling is processed, the video aliasing is processed, the hybrid processing of video switch processing; And result sent back among the buffering Buffer corresponding to the formation of signal output port or corresponding to the formation of image data port;

Be embedded into step in the video data stream depending on audio mode coding and audio frequency: be used for taking out the video/audio data flow of processing through central processing unit from buffering Buffer corresponding to the formation of signal output port, coding generates the video/audio data flow of radio and television video standard specifies, uses simultaneously the audio frequency embedded technology that audio data stream is merged in the video data stream;

Send the step of video/audio signal: the video/audio data flow after being used for encoding is converted to the physics electric signal that meets the equipment room interactive standards and is sent to signal output port;

Below two steps run parallel with " being embedded into step in the video data stream depending on audio mode coding and audio frequency ", " sending the step of video/audio signal " sequentially:

Video/audio is by the step of bus receiver transmission: be used for taking out the video/audio data flow of crossing through central processing unit for processing from buffering Buffer corresponding to the formation of image data port, the receiver by bus is sent in the formation of corresponding image data port of drive software;

Application software receives the step that gathers video/audio: be used for application software is taken out the formation of the corresponding image data port that is stored in drive software by the image data port video/audio data flow.

Images