Montreal-based Cable Television Laboratories Inc, a research and development consortium of cable television system operators representing more than 85% of the cable subscribers in the US and 45% in Canada, has launched a programme to set recommended guidelines for digital delivery of data and other services on cable television systems; the guidelines will recommend protocol, digital packet structure, bit rate, error correction practices and procedures, and cable transmission parameters such as modulation, bandwidth, channelisation and spectral location on cable.
