RECOMMENDATION ITU-R BS.707-4 … TRANSMISSION OF MULTISOUND IN TERRESTRIAL TELEVISION SYSTEMS PAL B, D1, G, H AND I, AND ...
ANNEX 1 … System specifications for the two sound-carrier FM system
ANNEX 2 … Summary of the system specification for digital multisound with terrestrial television systems B, G, H, I and L
1 Introduction
2 Frame format
    2.1 Frame structure
    2.2 Bit interleaving
    2.3 Energy dispersal scrambling
3 Coding of information
    3.1 Frame alignment word
    3.2 Control information
    3.3 Additional data
    3.4 Sound/data block
4 Modulation parameters