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The Study and Design of SD TV Audio Cascade Multiplex System Based on FPGA

Author: ChenHaiZan
Tutor: ChenGeHui
School: Central South University
Course: Electronic Science and Technology
Keywords: Digital TV Audio stacked plus embedded FPGA Error detection processing
CLC: TN941.2
Type: Master's thesis
Year: 2011
Downloads: 18
Quote: 0
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Abstract


With the continuous development of radio and television technology , television production and broadcasting system will gradually digitized ; emergence of multi - channel stereo , as well as the requirements of the viewers of television programs is getting higher and higher so that the digital audio plus embedded technology great development . Home and abroad plus embedded digital audio solution for the use of the dedicated audio plus embedded chip , dedicated ASIC is unable to correctly identify the gaps in the video line blanking , leading to cascading embedded failure . To solve this problem , this paper presents an FPGA - based audio stack plus embedded solutions . Paper, the FPGA's internal RAM cache the original audio and video signals embedded audio and then repackage embedded into the video line blanking , completed laminated embedder process . The two core technologies stacked plus embedded and EDH processing techniques are completed within FPGA . FPGA chip selection of is Altera Corporation cost-effective the Cyclone Ⅲ series of EP3C25E144C8 , EDA platform the Quartus Ⅱ ( ? ) 8.0 to achieve the SDI receiver , digital audio interfaces , audio data packet detection layer stack embedded core processing , EDH processing and other major functions . The design uses a the FPGA 's top-down and modular design concept , first the whole system is divided into several functional modules , then according to the needs of the various functional modules to fulfill its function , the entire system to integrate and optimize . Plus embedded technology , repackage the original audio information in the video with embedded audio data embedded in the video line blanking , to ensure lossless audio output to meet the requirements of television production and broadcasting system multi- channel stereo audio stacked . Audio receive digital audio overlay of embedded systems based on FPGA and lossless output , the output sound quality is good , system processing fast and easy system upgrade , and fully reflects the real-time performance and flexibility of the FPGA design . Of positive significance to the development of China 's radio and television career .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > TV > TV signal theory > Video channel,audio and correction
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