Rate control in a video encoder according to a bit count estimate

摘要

Described herein is a rate controller in a video system. The rate controller is comprised of a bit count estimator and a quantization selector. The bit count estimator receives an input to an encoder and generates a bit count estimate. The bit count estimate is an approximation of a bit count at an output of the encoder. The quantization selector sets a quantization value based on the bit count estimate.