Constant bitrate

Constant bitrate (CBR) is a term used in telecommunications, relating to the quality of service.

CBR is useful for streaming multimedia content on limited capacity channels since it is the maximum bit rate that matters, not the average, so CBR would be used to take advantage of all of the capacity.

The problem of not allocating enough data for complex sections could be solved by choosing a high bitrate to ensure that there will be enough bits for the entire encoding process, though the size of the file at the end would be proportionally larger.

(However, CBR is implied in a simple scheme like reducing all 16-bit audio samples to 8 bits.)

These packets are totally neutral and don't affect the stream.