ST 306:2002 - SMPTE Standard - For Television — 6.35-mm Type D-7 Component Format — Video Compression at 25 Mb/s and 50 Mb/s — 525/60 and 625/50

This standard specifies the content, format and recording method of the data blocks containing video, audio, and associated data which form the helical records on 6.35-mm tape contained in cassettes as specified in SMPTE 307M. — In addition, this standard specifies the content, format, and recording method for longitudinal cue and control tracks. — One video channel and two independent audio channels are recorded in the digital format for 25 Mb/s VTRs and one video channel and four independent audio channels for 50 Mb/s VTRs. Each of these channels is designed to be capable of independent editing. — The video channel records and reproduces a component television signal in the 525-line system with a frame frequency of 29.97 Hz (hereinafter referred to as the 525/60 system) and the 625-line system with a frame frequency of 25.00 Hz (hereinafter referred to as the 625/50 system). — Prior to recording, the digital signal shall be compressed to a DV-based 25 Mb/s bit stream with 4:1:1 sampling or a DV-based 50 Mb/s bit stream with 4:2:2 sampling. — The standard includes the process required to decode the DV-based 25 Mb/s bit stream and 50 Mb/s bit stream into output video, audio, and data.