CN101150681A - A broadcast digital video and audio collection and playing PCI extension card - Google Patents
A broadcast digital video and audio collection and playing PCI extension card Download PDFInfo
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- CN101150681A CN101150681A CNA2007101773238A CN200710177323A CN101150681A CN 101150681 A CN101150681 A CN 101150681A CN A2007101773238 A CNA2007101773238 A CN A2007101773238A CN 200710177323 A CN200710177323 A CN 200710177323A CN 101150681 A CN101150681 A CN 101150681A
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Abstract
The invention discloses a broadcasting digital video-audio collection and broadcasting PCI extension card in broadcast television device field, which is composed of following modules: a digital audio transmitting and receiving module, a digital video input processing module, a digital video output processing module, a generating module in synchronization with clock signal, a control logic and data path module, a video-audio buffer memory module and a PCI bus interface module. The invention receives and transmits video-audio input signals reliably, has low occupancy rate for computer CPU during the data transmission process, because in the collection and broadcasting process the invention does not adopt code rate compression technique to signals, the interface is a highlevel breakeven digital video-audio computer transmission interface, the invention has the advantages of simple structure, high reliability, low cost, flexible utilization, easy to update and maintain, can be used in the enviroment which is strict in cost and reliability, has better use value and wider market prospect.
Description
Technical field
The broadcast level digital video-audio that the present invention relates in a kind of radio and television equipment field is gathered and the broadcast PCI Mezzanine Card.
Background technology
In field of broadcast televisions, there is a large amount of application needs that multimedia messages is carried out digital processing, comprise the storage of multimedia material, broadcast, editor, these application relate to the collection/broadcast to audiovisual information, compression, convergent-divergent, mix, stunt generates, the collection/broadcast of audio-frequency information, compression, processing such as mixing.Traditional solution is to adopt custom-designed hardware circuit to carry out relevant treatment, and is often with high costs, very flexible, I﹠M cost height.Raising along with computer process ability, much looking the Audio Processing task can finish with software by universal computer platform, development along with the multimedia treatment technology, increasing computer is looked audio frequency processing system and has been adopted digital video-audio signal extension card to eliminate mould/number and D/A switch process to the influence of signal quality and the transmission and processing quality that improves signal, but product of the same type in the market all exists the price height, complex structure, upgrading and shortcoming such as difficult in maintenance.
Summary of the invention
The present invention has proposed a kind of broadcast level digital video-audio for the defective that overcomes the existence of above-mentioned technology and product just and has gathered and the broadcast PCI Mezzanine Card.
The present invention is sent and receiver module by digital audio, the digital video input processing module, the digital video output processing module, synchronously and the clock signal generation module, control logic and data path module, looking audio buffer memory module and pci bus interface module forms, described digital audio sends and receiver module, the digital video input processing module, the digital video output processing module, synchronously and the clock signal generation module, look the audio buffer memory module and be connected with the data path module with control logic respectively with the pci bus interface module, the pci bus interface module is connected with computer PCI bus.
The present invention is reliable to looking audio input signal reception and transmission, because adopted with the video field is the DMA transmission means in cycle, data transmission procedure is very low to the occupancy of computer CPU, because the present invention does not adopt the code check compress technique to signal in collection and broadcast process, is high-level complete break-even digital video-audio computer transmission interface therefore, to sum up, the present invention is simple in structure, the reliability height, and cost is low, use flexibly, upgrading and maintenance are easily.Can be applied in all has in the environment of strict demand cost and reliability, has stronger practical value and vast market prospect.
Description of drawings
Fig. 1 is a block diagram of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the present invention is by forming with lower module: digital audio sends with receiver module 1, digital video input processing module 2, digital video output processing module 3, synchronously and clock signal generation module 4, control logic and data path module 5, look audio buffer memory module 7 and pci bus interface module 6.Described digital audio send with receiver module 1, digital video input processing module 2, digital video output processing module 3, synchronous with clock signal generation module 4, look audio buffer memory module 7 and be connected with data path module 5 with control logic respectively with pci bus interface module 6, pci bus interface module 6 is connected with computer PCI bus.
Digital audio transmission of the present invention and receiver module 1 and digital video input processing module 2 and digital video output processing module 3 have adopted the interface of number format, that can handle number format looks the audio frequency input/output signal, and video/audio is not adopted the code check compression, thereby guaranteed data free of losses fully in input; Adopted dma controller in control logic and the data path module 5, it is the DMA transmission means in cycle that the transmission of data has been adopted with the video field, and has realized continuous burst transfer, and CPU takies low, pci bus utilance height.
Control logic of the present invention and data path module 5 have adopted the circuit that can directly handle, transmit the video/audio of uncompressed with looking in the audio buffer memory module 7.Look the video/audio of audio buffer memory module 7 available buffers storage uncompressed, control logic and data path module 5 can be real-time transmitted to the video/audio of looking uncompressed in the audio buffer memory module 7 in the calculator memory under drainage pattern; The video/audio of uncompressed is real-time transmitted to and looks in the audio buffer memory module 7 in can be with calculator memory under play mode.
The present invention can gather and broadcast under two kinds of patterns by time-sharing work.
Under drainage pattern, the digital video signal of input is handled by digital video input processing module 2 and is looked audio buffer memory module 7 after control logic and data path module 5 buffer memorys enter, the video data buffer of looking in the audio buffer memory module 7 can 1 complete two field picture of buffer memory, and the odd field data of every two field picture and Even Fields number are stored in respectively independently in the odd field memory block and even field memory block; Digital audio and video signals is after digital audio transmission and receiver module 1 receive, be cached in through control logic and data path module 5 and look in the audio buffer memory module 7, look the voice data of audio data buffer in can the buffer memory 1 two field picture corresponding time in the audio buffer memory module 7, voice data memory block and video data memory block be independence mutually.When beginning in every video field, control logic and data path module 5 pass through pci bus interface module 6 to computer application Interrupt Process, computer system is had no progeny in response, in the start-up control logical AND data path module 5 dma controller, with dma mode will look current before the input video field in the audio buffer memory module 7 one the video data of buffer memory and the voice data of corresponding time through pci bus interface module 6 continuous burst transfer to calculator memory.After the end of transmission, computer is done corresponding processing to the video/audio in the internal memory.
Under presentation mode, according to synchronously and the video line field timing signal that provides of clock signal generation module 4, when beginning in every video field, control logic and data path module 5 pass through pci bus interface module 6 to computer application Interrupt Process, computer system is had no progeny in response, in the start-up control logical AND data path module 5 dma controller, with dma mode with a video data in the internal memory and the voice data of corresponding time through pci bus interface module 6 continuous burst transfer to the corresponding buffering area of looking in the audio buffer memory module 7.The video line field timing signal that control logic and data path module 5 provide according to synchronous and clock signal generation module 4, digital video output processing module 3 and digital audio transmission and receiver module 1 are read and exported to respectively to the video/audio of looking in the audio buffer memory module 7, and digital video output processing module 3 and digital audio transmission produce digital video output signal and digital audio output signal respectively after doing respective handling with the video/audio of 1 pair of input of receiver module.
Synchronous and clock signal generation module 4 provides corresponding clock signals for each module in the system.
The invention is not restricted to the foregoing description, to those skilled in the art, any improvement that the above embodiment of the present invention is made or change can not exceed the embodiments of the invention that only illustrate by way of example and the protection range of claims.
Claims (4)
1. a broadcast level digital video-audio is gathered and the broadcast PCI Mezzanine Card, it is characterized in that: comprising: digital audio sends and receiver module (1), digital video input processing module (2), digital video output processing module (3), synchronously and clock signal generation module (4), control logic and data path module (5), look audio buffer memory module (7) and pci bus interface module (6), described digital audio sends and receiver module (1), digital video input processing module (2), digital video output processing module (3), synchronously and clock signal generation module (4), look audio buffer memory module (7) and be connected with data path module (5) with control logic respectively with pci bus interface module (6), pci bus interface module (6) is connected with computer PCI bus.
2. broadcast level digital video-audio as claimed in claim 1 is gathered and is broadcasted PCI Mezzanine Card, it is characterized in that: adopted dma controller in described control logic and the data path module (5).
3. broadcast level digital video-audio as claimed in claim 1 is gathered and is broadcasted PCI Mezzanine Card, and it is characterized in that: described digital audio sends the interface that adopts number format with receiver module (1), digital video input processing module (2) and digital video output processing module (3).
4. broadcast level digital video-audio as claimed in claim 1 is gathered and is broadcasted PCI Mezzanine Card, it is characterized in that: described control logic and data path module (5) and look the circuit that audio buffer memory module (7) is provided with direct processing, transmits the video/audio of uncompressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101773238A CN101150681A (en) | 2007-11-14 | 2007-11-14 | A broadcast digital video and audio collection and playing PCI extension card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101773238A CN101150681A (en) | 2007-11-14 | 2007-11-14 | A broadcast digital video and audio collection and playing PCI extension card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101150681A true CN101150681A (en) | 2008-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101773238A Pending CN101150681A (en) | 2007-11-14 | 2007-11-14 | A broadcast digital video and audio collection and playing PCI extension card |
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| CN (1) | CN101150681A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188473A (en) * | 2011-12-27 | 2013-07-03 | 北京同步科技有限公司 | Video capture card and processing method thereof |
| CN103686039A (en) * | 2012-09-11 | 2014-03-26 | 北京同步科技有限公司 | Multichannel video capture card and processing method thereof |
| WO2021121432A1 (en) * | 2019-12-20 | 2021-06-24 | 威创集团股份有限公司 | Digital audio and video connector and interface thereof |
-
2007
- 2007-11-14 CN CNA2007101773238A patent/CN101150681A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188473A (en) * | 2011-12-27 | 2013-07-03 | 北京同步科技有限公司 | Video capture card and processing method thereof |
| CN103188473B (en) * | 2011-12-27 | 2015-10-21 | 北京同步科技有限公司 | Video frequency collection card and processing method thereof |
| CN103686039A (en) * | 2012-09-11 | 2014-03-26 | 北京同步科技有限公司 | Multichannel video capture card and processing method thereof |
| WO2021121432A1 (en) * | 2019-12-20 | 2021-06-24 | 威创集团股份有限公司 | Digital audio and video connector and interface thereof |
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Open date: 20080326 |