A FAST ALGORITHM FOR REAL-TIME MPEG-2AUDIO CODING AND DECODING

Liu Changshu; Ma Xin; Li Wenyuan; Zhang Yuzhong

Volume 23 Issue 2

Feb. 2001

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Article Navigation > Journal of Electronics & Information Technology > 2001 > 23(2): 147-153

Liu Changshu, Ma Xin, Li Wenyuan, Zhang Yuzhong . A FAST ALGORITHM FOR REAL-TIME MPEG-2AUDIO CODING AND DECODING[J]. Journal of Electronics & Information Technology, 2001, 23(2): 147-153.

Citation:

Liu Changshu, Ma Xin, Li Wenyuan, Zhang Yuzhong . A FAST ALGORITHM FOR REAL-TIME MPEG-2AUDIO CODING AND DECODING[J]. Journal of Electronics & Information Technology, 2001, 23(2): 147-153.

Liu Changshu, Ma Xin, Li Wenyuan, Zhang Yuzhong . A FAST ALGORITHM FOR REAL-TIME MPEG-2AUDIO CODING AND DECODING[J]. Journal of Electronics & Information Technology, 2001, 23(2): 147-153.

Citation:

Liu Changshu, Ma Xin, Li Wenyuan, Zhang Yuzhong . A FAST ALGORITHM FOR REAL-TIME MPEG-2AUDIO CODING AND DECODING[J]. Journal of Electronics & Information Technology, 2001, 23(2): 147-153.

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A FAST ALGORITHM FOR REAL-TIME MPEG-2AUDIO CODING AND DECODING

Received Date: 1999-06-24
Rev Recd Date: 1999-11-25
Publish Date: 2001-02-19

Abstract

Abstract

A real-time MPEG-2 layerl,2 audio CODEC realized on one TMS320C31 chip,which is a new DSP product of TI,is developed in this paper. In order to realize code decode in real-time,new fast algorithms for MPEG-2 audio sub-band analysis filter and sub-band synthesis filter are presented respectively. Using these fast algorithms,the computational load of sub-band analysis/synthesis can be reduced to 1/5 and 1/10 that of the original algorithms respectively.All the algorithms have been simulated on software and hardware. Through a simulator,the programms are loaded to a TMS320C31 and realize code and decode in realtime.

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References(1)

References

MPEG,ISO/IEC 13818-3, Generic coding of moving pictures and associated audio,part3,Nov,1993.[2]T.Imai,J.Shiokaxa,H.Chiba,MPEG-1 audio real-time encoding system,IEEE Trans.on Consumer Electronics,1998,CE-44(3),888-894.[3]Chen Yu-Chi, Tsai Chien-Wu, Fast time-frequency transform and their applications to real-time software implenentation of AC-3 audio CODEC, IEEE Trans. on Consumer Electronics,1998,CE-44(2),413-423.[4]Masahiro Iwadare, Akihiko Sugiyama, A 128 kB/S HI-Fl audio CODEC based on adaptive transform coding with adaptive block size MDCT, IEEE J. On Selected Areas in Communications,1992,44(2),138-144.[5]Chen Jing,Tai Heng-Ming, Real-time implementation of the MPEG-2 audio CODEC on a DSP,IEEE Trans. on Consumer Electronics, 1998,CE-44(3),866-871.

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