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: | 1-五月-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 |
顯示於類別: | 期刊論文 |