A CCIR recommendation regarding various standardized image resolutions for coding high quality video images, primarily for broadcasting. It provides the foundation for MPEG1 and MPEG2 resolutions and coding.
International standard for digital video using 4:2:2 YUV designed to support both 525 line NTSC and 625 line PAL analogue signals. Now officially called ITU-R BT.601-2.
An international standard (renamed ITU 601) for component digital television that was derived from the SMPTE RP1 25 and EBU 3246E standards. ITU 601 defines the sampling systems, matrix values and filter characteristics for Y, Cr, Cb and RGB component digital television. It establishes a 4:2:2 sampling scheme at 13.5 MHz for the luminance channel and 6.75MHz for the chrominance channels with eight-bit digitizing for each channel. These sample frequencies were chosen because they work for both 525-line 60Hz and 625-line 50Hz component video systems. The term 4:2:2 refers to the ratio of the number of luminance channel samples to the number of chrominance channel samples; for every four luminance samples, the chrominance channels are each sampled twice. The Dl digital videotape format conforms to ITU 601.
A digital coding standard for television that is applicable to both the NTSC as well as PAL/SECAM technologies. The standard describes the encoding parameters for the 4:2:2 member of the family (where 4:2:2 is the ratio in which the luminance and chrominance sampling frequencies are related). One CCIR 601 video stream (no alpha) is about 22 MB/sec.
The standard for digitizing component video. Also sometimes called D1 after the VTR format that first used this signal.
The digital interface standard developed by the CCIR (Comite' Consultatif International de Radiodiffusion, International Radio Consultative Committee) based on component color encoding, in which the luminance and chrominance (color difference) sampling frequencies are related in the ratio 4:2:2: four samples of luminance (spread across four pixels), two samples of CR color difference, and two samples of CB color difference. The standard, which is also referred to as 4:2:2, sets parameters for both 525-line and 625-line systems.
CCIR 601 is the old name of a standard published by the CCIR (now ITU-R) for encoding interlaced analogue video signals in digital form. The new name of the standard is ITU-R BT.601, but the old name is still in common use in informal contexts. It includes methods of encoding 525 line 60 Hz and 625-line 50 Hz signals, both with 720 luminance samples and 360 chrominance samples per line.
