An Efficient Lossless Coding Algorithm and Its Application to Audio Coding

摘要

This paper proposes a tonal component coding algo- rithm for a codec that employs a transform followed by Hufman coding, such as MPEG-2 Audio AAC (advanced Audio coding) [1]. After the input audio signal is mapped onto the fre- Quency domain, the proposed algorithm removes local Maxima components that degrade the coding efficiency. As A result of this withdrawal, the flatness of the spectrum Increases and the efficiency of Huffman coding is im- Proved. The removed components are encoded separately As side information.