An Bit Allocation Method Based Rate-Distortion Control Algorithm for MPEG-4 Advanced Audio Coding
Rate-distortion control algorithms are used in perceptual audio coding for assigning suitable parameters to achieve bit constraint and keeping quantization distortion under audition masking threshold. The common rate-distortion control algorithms, such as the two-loop search, usually have poor performance and high computational complexity. In order to solve the problem, a JNLD psychoacoustic model is given to provide bit allocation estimation and a bit allocation method based one-loop structure valley search quantization rate-distortion control algorithm is proposed in this paper. The proposed algorithms provide low computational complexity and high objective quality when applied in MPEG-4 AAC.
Sheng Wu Xiaojun Qiu
Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, 210093, China
国际会议
2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)
镇江
英文
237-241
2008-07-07（万方平台首次上网日期，不代表论文的发表时间）