Definitions for "Constant Bit Rate"
Keywords:  cbr, vbr, throughput, atm, traffic
Information that is represented in a digital form by a constant stream of bits is said to have a constant bit rate. Traditional formats for encoding digital voice generate CBR traffic. Compare with variable bit rate.
In a video material, each recorded frame (picture) is allocated the same amount of data. This means the image quality will vary, according to the complexity of the recording (motion, color spectrum, misty backgrounds etc).
Digital information, such as video and digitized voice, that must be represented by a continuous stream of bits. CBR traffic requires guaranteed throughput rates and service levels.
Digital information that has a constant transmission rate over time, and typically supports synchronized timing between source and destination.