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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 12.65-mm (0.5-in) tape in cassettes as specified in ANSI/SMPTE 263M. In addition, this standard specifies the content, format, and recording method of the longitudinal record containing tracking information for the scanning head associated with the helical records, and also the longitudinal cue audio and time code tracks. One video channel and four independent audio channels are recorded in the digital format. Each of these channels is designed to be capable of independent editing.The video channel records and reproduces a composite television signal in the 525-line system with a frame frequency of 29.97 Hz. Figures 1 and 2 show a block diagram of the processes involved in the recorder.