標題: Cascaded trellis-based rate-distortion control algorithm for MPEG-4 advanced audio coding
作者: Yang, CH
Hang, HM
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: advanced audio coding (AAC);audio coding;rate-distortion control;trellis-based search
公開日期: 1-May-2006
摘要: In this paper, a few low-complexity and high-performance rate-distortion control algorithms for MPEG-4 Advanced Audio Coding (AAC) are proposed. One key element in producing good quality compressed audio particularly at medium and low rates is a high performance rate-distortion controller in the audio encoder. Although the trellis-based rate-distortion control algorithms previously proposed can achieve a praiseworthy performance, their computational complexity is extremely high. Therefore, for practical applications, it is very desirable to achieve a similar performance at a much lower complexity. Two types of techniques are proposed in this paper to reduce the computational burden of the trellis-based algorithms. One is splitting a very heavy calculation stage into two sequential steps with much less computation. The other is reducing the candidates in the trellis for parameter search. Together, when applicable, our approach achieves a similar coding performance (audio quality) but requires less than 1/1000 complexity in computation.
URI: http://dx.doi.org/10.1109/TSA.2005.857789
http://hdl.handle.net/11536/12324
ISSN: 1558-7916
DOI: 10.1109/TSA.2005.857789
期刊: IEEE TRANSACTIONS ON AUDIO SPEECH AND LANGUAGE PROCESSING
Volume: 14
Issue: 3
起始頁: 998
結束頁: 1007
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