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MPEG digital audio coding

机译：MPEG数字音频编码

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摘要

The Moving Pictures Expert Group (MPEG) within the International Organization of Standardization (ISO) has developed a series of audio-visual standards known as MFEG-1 and MPEG-2. These audio-coding standards are the first international standards in the field of high-quality digital audio compression. MPEG-1 covers coding of stereophonic audio signals at high sampling rates aiming at transparent quality, whereas MPEG-2 also offers stereophonic audio coding at lower sampling rates. In addition, MPEG-2 introduces multichannel coding with and without backwards compatibility to MPEG-1 to provide an improved acoustical image for audio-only applications and for enhanced television and video-conferencing systems. MPEG-2 audio coding without backwards compatibility, called IMPEG-2 Advanced Audio Coding (AAC), offers the highest compression rates. Typical application areas for MPEG-based digital audio are in the fields of audio production, program distribution and exchange, digital sound broadcasting, digital storage, and various multimedia applications. We describe in some detail the key technologies and main features of MPEG-1 and MPEG-2 audio coders. We also present the MPEG-4 standard and discuss some of the typical applications for MPEG audio compression.
机译：国际标准化组织（ISO）中的运动图像专家组（MPEG）已经开发了一系列视听标准，称为MFEG-1和MPEG-2。这些音频编码标准是高质量数字音频压缩领域中的第一个国际标准。 MPEG-1涵盖了以透明质量为目标的高采样率立体声音频信号的编码，而MPEG-2还以较低的采样率提供了立体声音频信号的编码。另外，MPEG-2引入了对MPEG-1具有和不具有向后兼容性的多通道编码，从而为纯音频应用以及增强的电视和视频会议系统提供了改进的声学图像。没有向后兼容性的MPEG-2音频编码称为IMPEG-2高级音频编码（AAC），可提供最高的压缩率。基于MPEG的数字音频的典型应用领域是音频生产，程序分发和交换，数字声音广播，数字存储以及各种多媒体应用领域。我们将详细描述MPEG-1和MPEG-2音频编码器的关键技术和主要功能。我们还将介绍MPEG-4标准，并讨论MPEG音频压缩的一些典型应用。

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