标准编号：ISO/IEC 23003-3:2012
中文名称：信息技术 MPEG音频技术 第3部分：统一语言和音频编码
英文名称：Information technology — MPEG audio technologies — Part 3: Unified speech and audio coding
发布日期：2012-04
标准范围
This part of ISO/IEC 23003 specifies a unfied speech and audio codec which is capable of coding signals having an arbitrary mix of speech and audio content. The codec has a performance comparable to or better than the best known coding technology that might be tailored specifically to coding of either speech or general audio content. The codec supports single and multi-channel coding at high bitrates and provides perceptually transparent quality. At the same time, it enables very efficient coding at very low bitrates while retaining the full audio bandwidth.This part of ISO/IEC 23003 incorporates several perceptually-based compression techniques developed in previous MPEG standards: perceptually shaped quantization noise, parametric coding of the upper spectrum region and parametric coding of the stereo sound stage. However, it combines these well-known perceptual techniques with a source coding technique: a model of sound production, specifically that of human speech.
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