Digital cable

Digital cable

Digital TV by Cable

Published in Lars-Ingemar Lundström, Understanding Digital Television, 2012

Digital cable television makes it possible to get the same content as in a complete satellite transponder into an 8 MHz channel that previously only distributed one analog channel. Today 8 to 10 TV channels in standard resolution may be housed within such a distribution channel. In addition to this, a noiseless picture is achieved in combination with improved audio. The only audio that used to be better is the NICAM stereo sound used in some of the European countries. Most cable TV operators in these countries did never introduce NICAM stereo in the cable networks, except for channels directly fed from terrestrial transmitters into the program content. Otherwise, NICAM encoding in cable networks was quite expensive.

The Changing Face of Public Broadcasting in India

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Journal Information

Published in IETE Journal of Education, 2023

R. N. Misra

The cable TV utilizes RF carriers in the 47–860 MHz frequency range, and the incoming signal is brought to user installation by means of a coaxial cable. The digital bit-stream, of digital cable TV, utilizes quadrature amplitude modulation (QAM) to modulate the RF carrier. The cable TV requires its own proprietary STB, which down converts and processes the incoming signal, as done by the corresponding STB in the case of satellite TV. The subscriber can choose programs of his or her liking, from a large number of channels, as per subscription.

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Digital TV by Cable

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