YCbCr601

YCbCr601 refers to a color space used in digital video and image processing. It is derived from the Rec. 601 standard, which was originally developed for standard-definition television. YCbCr is a luma (Y) and chroma (Cb and Cr) color space. The '601' designation indicates that it is based on the signal characteristics and display primaries defined in the Rec. 601 recommendation, primarily for SDTV.

In the YCbCr601 system, Y represents the luminance or brightness component of the signal, while Cb and Cr represent the blue-difference and red-difference chroma components, respectively. These components are derived from the original RGB (red, green, blue) color signals through a linear transformation. The transformation aims to separate the brightness information from the color information, which is beneficial for compression and transmission as the human eye is more sensitive to luminance than chrominance.

The specific transformation matrix and scaling factors used in YCbCr601 are defined by the Rec. 601 standard. This standard is closely associated with older television broadcasting systems. While YCbCr601 is a specific implementation, the broader YCbCr color space is widely used in various digital video formats like JPEG, MPEG, and digital television broadcasting. Understanding YCbCr601 is important when dealing with legacy video equipment and content that adheres to the Rec. 601 specification.