本标准规定了SMPTE ST 2073-1中定义的VC-5基本比特流的扩展，用于表示R′G′B′（A）图像，Y′C′₁C′₂（A） 无色差分量子采样的图像，以及包括拜耳图像格式的彩色滤光片阵列（CFA）图像。本标准规定了R′G′B′和Y′C′1C′2颜色值的默认颜色空间。本标准通过添加新参数和块元素扩展了SMPTE ST 2073-1:ImageFormat参数指定了图像的类型:R′G′B′（A），Y′C′₁C′₂（A） 、CFA或拜耳；PatternWidth、PatternHeight和ComponentsPerSample参数指定CFA图像的结构，包括拜耳图像； MaxBitsPerComponent参数指定表示位流中存在的组件数组中的所有值所需的位数上限；VendorSpecificDataChunk元素允许在VC-5比特流中嵌入私有数据；InverseTransform、InverseTransform16和InversePermutation块元素指定如何将解码的组件数组转换和重新排序为与最初呈现给编码器的相同的颜色空间和顺序；UniqueImageIdentifier chunk元素指定图像序列和在VC-5位流表示的图像序列中的位置。本标准扩展了SMPTE ST 2073- 1通过定义将解码组件阵列转换为图像的三个阶段:逆组件转换、逆组件置换和图像重新打包过程。本标准扩展了SMPTE ST 2073-1，以指定解码器实现的性能级别。

This standard specifies extensions to the VC-5 Elementary Bitstream defined in SMPTE ST 2073-1 for representing R′G′B′(A) images, Y′C′₁C′₂(A) images without color difference component sub-sampling, and Color Filter Array (CFA) images including Bayer image formats. This standard specifies the default color space for R′G′B′ and Y′C′1C′2 color values.This standard extends SMPTE ST 2073-1 by adding new parameters and chunk elements:The ImageFormat parameter specifies the type of image: R′G′B′(A), Y′C′₁C′₂(A), CFA, or Bayer;The PatternWidth, PatternHeight, and ComponentsPerSample parameters specify the structure of CFA images, including Bayer images;The MaxBitsPerComponent parameter specifies an upper bound on the number of bits needed to represent all values in the component arrays present in the bitstream;The VendorSpecificData chunk element allows private data to be embedded in a VC-5 bitstream;The InverseTransform, InverseTransform16, and InversePermutation chunk elements specify how to transform and reorder decoded component arrays into the same color space and order as originally presented to the encoder;The UniqueImageIdentifier chunk element specifies the image sequence and position within the sequence of an image represented by a VC-5 bitstream.This standard extends SMPTE ST 2073-1 by defining three stages for transforming decoded component arrays into images: inverse component transform, inverse component permutation, and image repacking process.This standard extends SMPTE ST 2073-1 to specify levels of performance for decoder implementations.