DANSK DS/EN 62071-1 PDF

This part of IEC 62071 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 is 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.