Efficient bit allocation algorithm for ISO/MPEG audio encoder

作     者：Teh, DH Koh, SN Tan, AP 

作者机构：Nanyang Technol Univ Sch Elect & Elect Engn Singapore 2263 Singapore Panason Singapore Labs Pte Ltd Singapore Singapore 

出 版 物：《ELECTRONICS LETTERS》 (电子学快报)

年 卷 期：1998年第34卷第8期

页      面：721-722页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：ISO/MPEG audio encoder telecommunication standards operational bit rate audio coding data compression ISO standards bit allocation algorithm masking threshold quantisation noise ISO/MPEG compliant bit stream Codes quantisation (signal) computational steps reduction Audio equipment and systems Signal processing and detection 96 kbit/s psychoacoustic model 

摘      要：An efficient bit allocation algorithm for the ISO/MPEG audio layer 2 encoder is proposed. The resulting encoder is able to produce an ISO/MPEG compliant bit stream which is almost identical to the bit stream produced by the reference ISO/MPEG encoder suggested in IS 11172-3. More importantly, the number of computational steps is greatly reduced as compared to the method recommended by the ISO/MPEG Committee because the efficient bit allocation algorithm significantly reduces the number of iterations required. It was found that the efficient bit allocation algorithm works best when the bit rate demanded by the psychoacoustic model in order to keep the quantisation noise below the masking threshold is almost equal to the operational bit rate.