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Deng Guanglin; Ji Zaogen; Wan Jinsheng(Bening Stallite Station, Beijing 100094)
Published:
Abstract: Audio-coding technique is one of the important problems of a Video Confelence System. The article describes sub-band adaptivo differential pulse code modulation with a bit rate below 64kbit/s. The transmission quadrature mirror tilters comprise two linear-phase non-recursive digital tilters which split the frequency band illto two sub-bands.The difference signals are quantized to 6 and 2 bit for the lower and higher sub(bands respectively.The adaptive predictors compute predicted signal values for the lower and higher sub-bands respectively. The decoding results show that the restored audio is successful and the odd order form of audio is as same as the even ord e r.
Deng Guanglin; Ji Zaogen; Wan Jinsheng(Bening Stallite Station, Beijing 100094). A RESEARCH OF AUDIO-CODING IN VIDEO CONFERENCE[J]. .
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