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A cable channel (sometimes known as a cable network) is a television network available via cable television. Many of the same channels are distributed through satellite television . Alternative terms include non-broadcast channel or programming service , the latter being mainly used in legal contexts.
Analog television is the original television technology that uses analog signals to transmit video and audio. [1] In an analog television broadcast, the brightness, colors and sound are represented by amplitude , phase and frequency of an analog signal.
Advanced Television Systems Committee (ATSC) standards are an international set of standards for broadcast and digital television transmission over terrestrial, cable and satellite networks. It is largely a replacement for the analog NTSC standard – like that standard – is used mostly in the United States , Mexico , Canada , South Korea ...
L-carrier also carried the first television network connections, though the later microwave radio relay system soon became more important for this purpose. Type L-3 was used for a short time for coast-to-coast network television feeds, but the advent of NTSC color was the cause for the move to Type TD microwave radio.
An analog Nagravision system (Syster) for scrambling analog satellite television programs was used in the 1990s.In this line-shuffling system, bottom 32 lines of the PAL TV signal are shifted in time by one video field, and read out in permuted order under the control of a pseudorandom number generator.
Cable television networks began simulcasting in 2004 and analog cable services were switched off in April 2007. The switchover was co-ordinated by the Digital Switchover Taskforce operating under the federal Department of Broadband, Communications and the Digital Economy.
Comcast is planning to spin off most of its cable television networks, including MSNBC and CNBC, into a separate publicly traded company, according to executives with knowledge of the plan.
PacketCable network is a technology specification defined by the industry consortium CableLabs for using Internet Protocol (IP) networks to deliver multimedia services, such as IP telephony, conferencing, and interactive gaming on a cable television infrastructure.