MEMORY REDUCTION TECHNIQUE OF SPREADING FUNCTION IN MPEG AAC ENCODER

Shih Way Huang, Liang Gee Chen, Tsung Han Tsai

研究成果: 雜誌貢獻會議論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

In order to reduce the computational complexity of an MPEG AAC encoder, calculation of spreading function, which is the critical algorithm in the psychoacoustic model, can be replaced with look-up tables. However, the memory size of the table is considerably large in DSP or hardware implementation for portable devices. The paper deals with the methods to reduce the memory size. We modified a method originally used in an MP3 software encoder and adopted it in an MPEG AAC encoder. The result shows that only about one-third of the original size is required in programmable processor implementation such as DSP. Moreover, for hardware implementation, we analyzed the wordlength and reduced the size to only 3.6% compared to that for a 16-bit DSP while maintaining audio quality.

原文???core.languages.en_GB???
頁(從 - 到)331-334
頁數4
期刊Proceedings of the International Conference on Digital Audio Effects, DAFx
出版狀態已出版 - 2004
事件7th International Conference on Digital Audio Effects, DAFx 2004 - Naples, Italy
持續時間: 5 10月 20048 10月 2004

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