Broadband Video consists of the complete bandwidth of a transmission medium and its ability to transport multiple signals and traffic types simultaneously. The medium can be coax, optical fiber, twisted pair or wireless. In contrast, baseband describes a communication system in which a single set of information is transported across the transmission medium.
The term &#;baseband video&#; refers to a signal that contains the necessary information to reproduce a picture but it is not modulated onto a radio frequency carrier. Some examples are: composite, component, VGA and HDMI video. A TV monitor typically has these inputs available for picture viewing. The bandwidth is typically 5 MHz.
The term &#;broadband video&#; refers to any baseband signal that is modulated into RF carriers. Each RF carrier represents a TV channel, such as channel 2 or 3 etc. Although, the bandwidth of the TV spectrum has only 134 channels, digital video can use sub-channels giving the consumer the option of hundreds of individual viewing channels. Each channel can have multiple sub channels such as channel 2.2, 2.2, 2.3, etc. Typically today you can have hundreds of baseband signals modulated on a broadband RF system. A TV simply tunes to the various channels.
Typical examples of a baseband application are monitoring security cameras and interconnection between set top boxes and the TV monitors. On the other hand, an example of a broadband application is viewing CATV/satellite in your home (typically hundreds of HD video and audio channels). A broadband signal is the input to the set top box; the output is typically either Channel 3, 4 or a baseband signal (HDMI, composite, component)
Broadband RF systems provide a simple way to connect a large number of CATV, satellite, off air, internally generated video, and digital signage sources to a large number of TV devices without impacting the local area network bandwidth. While most people think of coax when using a broadband RF video distribution system, it is also advantageous if the broadband RF signal is transported over an intelligent, structured Category cabling (i.e. twisted pair) based system for consistent picture quality, plug-n-play adds, moves and changes, and cabling system obsolescence protection; you are ready whenever IPTV becomes the video distribution system of choice.
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Electronic data in their original form. Baseband refers to analog or digital data before being intermixed with other data. See multiplexing and modulation.
The output of an analog microphone is baseband because it is only voice frequencies. When an FM station's carrier frequency in the receiving radio is stripped away (demodulated), the original audio signal that one hears is the baseband signal. See frequency modulation and carrier frequency.
Ethernet transmission is considered baseband, because signals are not intermixed and occupy the full bandwidth of the line. In fact, "base" is part of the Ethernet version name (see 10Base-T and 100Base-T).
When a compressed digital signal such as MP3 is transcoded to another audio format, it is first decompressed back to the original bit rate (baseband signal) before it is compressed into the new format; for an example, see aptX. See baseband processor.
Baseband Video
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