Channel

A designated service or transmission path that carries content or signals, identified by a frequency, channel number, or network.

Frequency-division multiplexing: A transmission method that carries multiple signals simultaneously by assigning each a different frequency band. Broadcast systems use separate frequency bands to distinguish channels sharing the same medium.
Television channel: A service that distributes television programming under a distinct name, number, or schedule. It is the familiar programming-service sense of a designated channel.
Broadcasting: The one-to-many distribution of audio or video content to a dispersed audience. Broadcasting is the broader distribution process; a channel is one identifiable service or path within it.
Radio spectrum: The range of electromagnetic frequencies used for radio communication and broadcasting. Broadcast channels occupy portions of this finite shared resource.
Time-division multiplexing: A method that assigns different time slots on one communication channel to multiple signals. Digital systems can distinguish streams by scheduled transmission times rather than separate frequencies.
Radio channel: A radio broadcast service or frequency allocation used to transmit audio programming. It identifies audio broadcasts through assigned frequencies or service names.
Streaming media: Media delivered continuously over a network for playback as data arrives. Streaming services distribute programs without necessarily using numbered broadcast channels.
Frequency allocation: The regulation of radio-frequency bands for particular services and uses. It establishes which parts of the spectrum can host broadcast channels.
Bandwidth (signal processing): The range of frequencies occupied by a signal or available to a transmission system. A channel's bandwidth limits how much information it can carry.
Digital television: Television transmitted as digitally encoded data rather than as an analog signal. Digital transmission can place several programming services within one broadcast channel.

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RavineRelated: A ravine commonly contains a stream channel at its floor.