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A FAST ALGORITHM FOR REAL-TIME MPEG-2AUDIO CODING AND DECODING |
Liu Changshu; Ma Xin; Li Wenyuan; Zhang Yuzhong |
School of Electronics Information Engineering Tianjin University Tianjin 300072 China |
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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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Received: 24 June 1999
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