Introduction to AVS Audio

This paper describes a general audio coding algorithm which has beenrecently standardized by AVS, China. The algorithm is based on aperceptual coding technique. The codec delivers near CD-quality audio at128kb/s. This paper describes the coder structure in detail anddiscusses the reasons for specific design methods. A summary of thesubjective test results are presented for the prototype codec.Comparison Mean Opinion Score (CMOS) test indicates that the quality ofthe AVS audio coder is comparable with MPEG Layer-3 audio coder. Areal-time decoder was used for the characterization test, which is basedon a 16-bit fixed-point DSP. The performance of the DSP solution wasdemonstrated, including computational complexity and storagecharacteristics.