BS 6865:1987

National foreword
Committees responsible
Chapter I: Longitudinal Time Code (LTC)
1 Scope
2 Modulation method
3 Code format
4 Structure of the time address
5 Additional colour television requirements
6 Waveform of the time and control code signal
7 Timing of the start of the code word
Chapter II: Vertical-Interval Time Code (VITC)
1 Scope
2 Modulation method and bit-rate
3 Code format 625/50 systems
4 Code format 525/60 systems
5 Structure of the coded data
6 Relationship between the vertical-interval time code
   and the television signals prior to recording
7 Specifications for the characteristics of the VITC
   signal prior to recording
Appendices
A The use of cyclic redundancy check codes for error
   detection
B Definition of field one in the eight-field sequence
   of the PAL signal
C Timing relationship between the subcarrier reference
   and the line synchronizing pulses for PAL recordings

Format and modulation methods to be used for longitudinal time code and vertical-interval time-and-control code for timing and control purposes on television tape-machines for 625/50 and 525/60 systems.