ISO/IEC 13818-7:2006
信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码(AAC)

Information technology - Generic coding of moving pictures and associated audio information - Part 7: Advanced Audio Coding (AAC)

被代替

ISO/IEC 13818-7:2006 发布历史

ISO/IEC 13818-7:2006由国际标准化组织 IX-ISO 发布于 2006-01。

ISO/IEC 13818-7:2006 在中国标准分类中归属于: L81 计算机图形,A15 电影与摄影技术，在国际标准分类中归属于: 35.040 字符集和信息编码。

ISO/IEC 13818-7:2006 信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码(AAC)的最新版本是哪一版？

最新版本是 ISO/IEC 13818-7:2006/Cor 2:2010 。

ISO/IEC 13818-7:2006的历代版本如下：

• 2010年 ISO/IEC 13818-7:2006/Cor 2:2010 信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码 技术勘误表2
• 2009年 ISO/IEC 13818-7:2006/Cor 1:2009 信息技术.移动图像和相关音频信息的一般编码.第7部分:高保真音频编码(AAC).技术勘误1
• 2007年 ISO/IEC 13818-7:2006/Amd 1:2007 信息技术.运动图像及其伴音信息的通用编码.第7部分:数字音频压缩技术(AAC).修改件1:运动图像专家组环绕数字音频压缩技术的运行
• 2006年 ISO/IEC 13818-7:2006 信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码(AAC)
• 2005年 ISO/IEC 13818-7:2004/Cor 1:2005 信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码(AAC).技术勘误1
• 2004年 ISO/IEC 13818-7:2003/Amd 1:2004 信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码(AAC).修改件1:频带扩展的嵌入
• 2004年 ISO/IEC 13818-7:2004 信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码
• 2003年 ISO/IEC 13818-7:2003 信息技术.运动图像及其伴音信息的通用编码.第7部分:高保真音频编码(AAC)
• 1998年 ISO/IEC 13818-7:1997/Cor 1:1998 信息技术 运动图像及其伴音信息的通用编码 第7部分:高保真音频编码(AAC) 技术勘误1
• 1997年 ISO/IEC 13818-7:1997 信息技术 运动图像及其伴音信息的通用编码 第7部分:高保真音频编码(AAC)

1 General This International Standard describes the MPEG-2 audio non-backwards compatible standard called MPEG-2 Advanced Audio Coding, AAC [1], a higher quality multichannel standard than achievable while requiring MPEG-1 backwards compatibility. This MPEG-2 AAC audio standard allows for ITU-R “indistinguishable” quality according to [2] at data rates of 320 kbit/s for five full-bandwidth channel audio signals. The AAC decoding process makes use of a number of required tools and a number of optional tools. Table 1 lists the tools and their status as required or optional. Required tools are mandatory in any possible profile. Optional tools may not be required in some profiles. 2 MPEG-2 AAC Tools Overview The basic structure of the MPEG-2 AAC system is shown in Figure 1 and Figure 2. As is shown in Table 1, there are both required and optional tools in the decoder. The data flow in this diagram is from left to right, top to bottom. The functions of the decoder are to find the description of the quantized audio spectra in the bitstream, decode the quantized values and other reconstruction information, reconstruct the quantized spectra, process the reconstructed spectra through whatever tools are active in the bitstream in order to arrive at the actual signal spectra as described by the input bitstream, and finally convert the frequency domain spectra to the time domain, with or without an optional gain control tool. Following the initial reconstruction and scaling of the spectrum reconstruction, there are many optional tools that modify one or more of the spectra in order to provide more efficient coding. For each of the optional tools that operate in the spectral domain, the option to “pass through” is retained, and in all cases where a spectral operation is omitted, the spectra at its input are passed directly through the tool without modification. The input to the bitstream demultiplexer tool is the MPEG-2 AAC bitstream. The demultiplexer separates the parts of the MPEG-AAC data stream into the parts for each tool, and provides each of the tools with the bitstream information related to that tool.

标准号

ISO/IEC 13818-7:2006

发布

2006年

发布单位

国际标准化组织

替代标准

ISO/IEC 13818-7:2006/Amd 1:2007

当前最新

ISO/IEC 13818-7:2006/Cor 2:2010

 

 

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