BS 7133:1989

National foreword
Committees responsible
1 Scope
2 Object
Section one - General
3 System description
Section two - Format of the recorded signal
4 General
5 Transmission rate
6 Configuration of the synchronizing signal
6.1 Horizontal synchronizing signal
6.2 Vertical synchronizing signal
7 Configuration of the horizontal line
7.1 Data synchronizing signal
7.2 Data block
7.3 White reference signal
7.4 Assignment in the horizontal period
8 Configuration of the vertical field
8.1 Audio data block line
8.2 Control data block line
8.3 Assignment in the vertical field
Section three - Source encoding
9 Audio signal
9.1 Number of audio channels
9.2 Emphasis
10 Source encoding
10.1 Sampling
10.2 Quantization
10.3 Coding
Section four - Data block
11 Configuration of the audio data block
11.1 General
11.2 Sampled signal word
11.3 Error correcting word
11.4 Interleaving
11.5 Error detecting word
11.6 Assignment in the audio data block
12 Configuration of the control data block
12.1 General
12.2 Cueing word
12.3 Content identification word
12.4 Address word
12.5 Control word
12.6 Error detecting word
12.7 Assignment in the control data block
Figures
Appendices
A Noise level in back porch
B Error correcting word
C Videocassette system considerations

Specifies the signal format for recording/reproducing PCM form audio signals through a domestic video cassette system, and provides for standardized system operation, compatability of PCM systems with players/systems and tape interchangeability.

This standard applies to the reversible process achieved by the PCM encoder/decoder system that transforms two audio signals into one PCM signal for compatibility with either the 60 fields/525 lines or the 50 fields/625 lines television system.