1、 IEEE Standard for Advanced Mobile Speech and Audio Sponsored by the Standards Activities Board IEEE 3 Park Avenue New York, NY 10016-5997 USA IEEE Computer Society IEEE Std 1857.5-2015 IEEE Std 1857.5-2015 IEEE Standard for Advanced Mobile Speech and Audio Sponsor Standards Activities Board of the
2、IEEE Computer Society Approved 5 December 2015 IEEE-SA Standards Board 2 Copyright 2017 IEEE. All rights reserved. Abstract: A set of tools to support specific audio coding functions including ACELP/TVC compression, bandwidth extension, stereo coding, frame erasure concealment, etc. is defined in th
3、is standard. The tool set defined in this standard provides high quality and efficient coding tool sets for compression, decompression, processing, and representation of speech, music or mixed audio signals to save transmission bandwidth and storage space. The target applications and services includ
4、e but not limited to mobile communication, wireless broadband multimedia communications, internet broadband streaming media service and applications. Keywords: ACELP, bandwidth extension, IEEE 1857.5, mobile speech and audio, TVC, vector quantization The Institute of Electrical and Electronics Engin
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34、is entirely their own responsibility. Further information may be obtained from the IEEE Standards Association. 6 Copyright 2017 IEEE. All rights reserved. Participants At the time this draft standard was submitted to the IEEE-SA Standards Board for approval, the Audio Video Coding Working Group had
35、the following membership: Wen Gao, Chair Cliff Reader, Vice Chair Haojiang Deng Weibei Dou Ge Gao Ruimin Hu Tiejun Huang Lin Jiang Xun Li Fuhui Lin Peilin Liu Fuwei Ma Weiping Tu Xiaochen Wang Jing Xiao Yuhong Yang Jie Zhan Tao Zhang Yong Zhang The following members of the individual balloting commi
36、ttee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. Pieter Botman Juan Carreon Wang Chen Xilin Chen Keith Chow Weibei Dou P. Eastman Ge Gao Wen Gao Randall Groves Zongming Guo Werner Hoelzl Ruimin Hu Noriyuki Ikeuchi Ming Jiang Tingting Jiang Piotr Karocki
37、 Houqiang Li Weiping Li Fan Liang Chong Luo Siwei Ma Luntian Mou Michael Newman Honggang Qi Lei Qin Guangming Shi Walter Struppler Jiande Sun Yonghong Tian Xushu Wang Forrest Wright Feng Wu Jing Xiao Ruiqin Xiong Yuhong Yang Li Yu Oren Yuen When the IEEE-SA Standards Board approved this standard on
38、5 December 2015, it had the following membership: John D. Kulick, Chair Jon Walter Rosdahl, Vice Chair Richard H. Hulett, Past Chair Konstantinos Karachalios, Secretary Masayuki Ariyoshi Ted Burse Stephen Dukes Jean-Philippe Faure J. Travis Griffith Gary Hoffman Michael Janezic Joseph L. Keopfinger
39、David J. Law Hung Ling Andrew Myles T. W. Olsen Glenn Parsons Ronald C. Petersen Annette D. Reilly Stephen J. Shellhammer Adrian P. Stephens Yatin Trivedi Philip Winston Don Wright Yu Yuan Daidi Zhong *Member Emeritus 7 Copyright 2017 IEEE. All rights reserved. Introduction This introduction is not
40、part of IEEE Std 1857.5-2015, IEEE Standard for Advanced Mobile Speech and Audio. This standard provides regular high quality and efficient coding tool sets for compression, decompression, and packaging of the multimedia data to save bandwidth and storage usage. 8 Copyright 2017 IEEE. All rights res
41、erved. Contents 1. Overview .10 1.1 Scope 10 1.2 Purpose .10 1.3 Audio-coding tools .10 1.4 Document structure .10 2. Normative references .11 3. Definitions, symbols, and abbreviations 11 3.1 Definitions 11 3.2 Symbols and abbreviations .12 4. General overview.16 4.1 Input signal .16 4.2 Module com
42、position .16 4.3 Internal sampling frequency and bit rate 16 4.4 Structure of encoder and decoder .17 4.5 Low complexity operation 19 4.6 Frame erasure concealment 19 4.7 Bit allocation.20 5. Encoder 22 5.1 Input signal pre-processing .22 5.2 Hybrid ACELP/TVC encoding mode .24 5.3 ACELP/TVC hybrid c
43、oding module 37 5.4 Mono signal high-band encoding (BWE) .93 5.5 Parameters stereo encoding in frequency domain.95 5.6 Streaming format 101 6. Decoder .107 6.1 Mono low frequency synthesis .107 6.2 Mono signal high-band synthesis .118 6.3 Stereo low-frequency synthesis 120 6.4 Packet loss concealmen
44、t .125 6.5 Post processing .129 6.6 Producing output signal 130 7. Detailed bit allocation 130 8. Storage and transport interface formats .138 8.1 Encode mode and bit rates 138 8.2 Transport format .139 8.3 Storage format 139 Annex A (normative) Tables of stereo parameters 142 Annex B (informative)
45、Comfortable noise model .147 B.1 Summary 147 B.2 Encoder function 147 B.3 Background noise parameters calculation 148 B.4 Decoder function 149 9 Copyright 2017 IEEE. All rights reserved. B.5 Comfort noise generation and update.150 Annex C (normative) Voice activity detection 151 C.1 Summary 151 C.2
46、Function description .151 10 Copyright 2017 IEEE. All rights reserved. IEEE Standard for Advanced Mobile Speech and Audio 1. Overview 1.1 Scope This standard describes a set of speech and audio compression, decompression and packaging tools and mechanism. It is applicable to the following areas: Mob
47、ile communication Wireless broadband multimedia communication Internet broadband streaming media business 1.2 Purpose This standard provides regular low-bit rate speech and audio-coding tool sets for wireless and mobile speech and audio compression and decompression. It provides error masking abilit
48、y, supports stereo effect, supports wideband audio quality and saves bandwidth for wireless transmission and mobile communication and memory space for storage. 1.3 Audio-coding tools In this standard, a set of audio coding tools are defined for encoding, transmitting and decoding of recorded speech,
49、 music, and other audio signals. The coding standard describes the detailed mapping from input blocks of monophonic or stereophonic audio samples with sampling rates of 8 kHz, 16 kHz, 24 kHz, 32 kHz, 48 kHz, 11.025 kHz, 22.05 kHz, and 44.1 kHz in 16 bit uniform PCM format to encode blocks and from encoded blocks to output blocks of reconstructed monophonic or stereophonic audio samples. The available mono bitrates are from 10.4 kb/s to 24 kb/s and stereo bitrates are from 12.4 kb/s to 32 kb/s. 1.4 Document structure The structure of this document is as follows:
