基于小波变换和音质模型的音频编码算法研究

Study on Algorithms of Low Bit Rate Hi-Fi Audio Coding Based on Wavelet Transform and Psychoacoustic Model

音频编码要解决的问题是以最小感知失真用低速率表达音频信号．本文设计了一种基于正交小波变换和音质模型的自适应比特分配音频编码算法，它可以将 １４１１．２ｋｂｉｔ／ｓ的双声道立体声高保真音频信号压缩成低至３２ｋｂｉｔ／ｓ的速率，并保持很好的音频质量．

The Problem of audio coding is to achieve a low bit rate in the digital representation of an actio signal with minimum perceived loss of quality, A Hi-Fi audio coding algorithm based on orthogonal Wavelet transform, psychoacoustic model and adaptive bit allocation is designed. The 1411.2kbit/s stereo Hi-Fi audio signals can be compressed to the bit late as low as 32kbit/s with good audio quality.