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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Review Article AVS-M Audio: Algorithm and Implementation | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2011 Article ID 567304 16 pages doi 10.1155 2011 567304 Review Article AVS-M Audio Algorithm and Implementation Tao Zhang Chang-Tao Liu and Hao-Jun Quan School of Electronic Information Engineering Tianjin University Tianjin 300072 China Correspondence should be addressed to Tao Zhang zhangtao@tju.edu.cn Received 15 September 2010 Revised 5 November 2010 Accepted 6 January 2011 Academic Editor Vesa Valimaki Copyright 2011 Tao Zhang et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. In recent years AVS-M audio standard targeting at wireless network and mobile multimedia applications has been developed by China Audio and Video Coding Standard Workgroup. AVS-M demonstrates a similar framework with AMR-WB . This paper analyses the whole framework andthe core algorithms of AVS-M with an emphasis on the implementation ofthe real-time encoder and decoder on DSP platform. A comparison between the performances of AVS-M and AMR-WB is also given. 1. Introduction With the expanding of wireless network bandwidth the wireless network has been documented to support not only the traditional voice services bandwidth of 3.4 kHz but also music with bandwidths of 12 kHz 24 kHz 48 kHz and so forth. This advancement promotes the growth of various audio services such as mobile music mobile audio conference and audio broadcasting. However the current wireless network is unable to support some popular audio formats e.g. MP3 and AC3 attributed to the bandwidth limitation. To solve this problem many audio standards for mobile applications have been proposed such as G.XXX series standard ITU-T AMR series standard 3GPP and AVS-M audio standard AVS workgroup China 1 2 . ITU-T proposed a series of audio coding algorithm standards including G.711
