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Definitions of constant bit rate:

) specifies a fixed bit rate so that data is sent in a steady stream. This is analogous to a leased line.
www.cites.uiuc.edu/glossary/
Constant Bit Rate is an encoding method that maintains the same bit rate across the entire audio or video file.
www.idvd.ca/dvd-definitions-glossary.htm
an ATM traffic contract characterised by constant speed of data transmission and constant delays; such contracts are applied for emulation of leased lines (known also as digital channels, see CES) and, in particular cases, some of voice and video transmission
www.crowley.pl/dictionary.dhtml
Definition: An ATM service category which supports a constant and guaranteed rate to transport services such as video or voice as well as circuit emulation which requires rigorous timing control and performance parameters. CBR requires the specification of PCR and QoS (see PCR and QoS).
community.roxen.com/developers/idocs/rfc/rfc2761.html
A service class intended for real-time applications, or those requiring tightly constrained delay and delay variation, as would be appropriate for voice and video applications. The constant availability of a fixed quantity of bandwidth is considered appropriate for CBR service.
www.bcapa.com/about/glossary.php
A method of encoding the music from the CD at a fixed number of bits throughout the song. It pays no attention to the music levels it is encoding.
www.cdlabs.co.uk/glossary/
One of the five ATM classes of service. CBR supports the transmission of a continuous bit-stream of information, such as voice and video traffic, which require a constant amount of bandwidth allocated to a connection for the duration of the transmission.
members.lycos.co.uk/ahsanshahzad/network_glossary.htm
The term constant bit rate (CBR) is a term in telecommunications Quality of Service. Compare with variable bit rate.
en.wikipedia.org/wiki/Constant_bit_rate

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