"ITU-R BT 656视频标准应用技术指南：数字视频标准及设备解析"

The ITU-R BT. 656 video standard is a digital video standard that is used in the broadcasting industry. It sets the specifications for the transmission of component and composite digital video signals, providing guidelines for the generation, transmission, and reception of digital video. The standard is based on the ITU-R BT. 601 standard, which defines the digital representation of analog video signals. It specifies the level diagram at the input of an A/D converter for the analog component signals Y, CB, and CR, which are used to represent the brightness and color information of the video signal. The standard also defines the levels for the digital representation of these analog signals, such as the range of values for Y, CB, and CR signals, which are represented in binary form. In order to comply with the ITU-R BT. 656 standard, manufacturers produce products such as CCVS component generators, AFCCVS generators, and digital video component analyzers. These products are designed to generate and analyze digital video signals according to the specifications set by the standard, ensuring that the transmitted video signals meet the required quality and compatibility. The standard also outlines the color space and chroma subsampling formats for digital video signals, ensuring that the color information is accurately represented and transmitted. This is essential for maintaining the integrity of the video signal and ensuring that the color reproduction is consistent across different display devices. Overall, the ITU-R BT. 656 video standard plays a crucial role in the broadcasting industry, providing the guidelines and specifications for the generation, transmission, and reception of digital video signals. By complying with these standards, manufacturers can ensure that their products meet the required quality and compatibility, ultimately contributing to the seamless transmission and display of digital video content.