CCIR Standards for Digital Video

(CCIR - Consultative Committee for International Radio)

                       CCIR 601       CCIR 601         CIF         QCIF
                        525/60         625/50   
		                      NTSC         PAL/SECAM         NTSC
--------------------  -----------    -----------   -----------  -----------
Luminance resolution   720 x 485      720 x 576     352 x 240    176 x 120
Chrominance resolut.   360 x 485      360 x 576     176 x 120     88 x 60
Colour Subsampling        4:2:2          4:2:2   
Fields/sec                60             50            30           30
Interlacing               Yes            Yes           No           No

• CCIR 601 uses interlaced scan, so each field only has half as much vertical resolution (e.g., 243 lines in NTSC). The CCIR 601 (NTSC) data rate is 165 Mbps.

• CIF (Common Intermediate Format) is introduced to as an acceptable temporary standard. It delivers about the VHS quality. CIF uses progressive (non-interlaced) scan.