The Novel Improving Algorithms on DRA Audio Entropy Coding
Jianxin Yan, Lei Wang · 2020
DRA (Digital Rise Audio) is referred to as specification for multi-channel digital audio coding technology which was issued as a Chinese national standard in 2008. There novel algorithms which are the differential Huffman, context-based Huffman and context-based arithmetic entropy coding, respectively, are presented to improve the compression efficiency of DRA entropy coding with 3%, 11.11% and 13.52% at the expense of the different implementing complexities and the intra-frame and/or inter-frame error propagation in live transmission.