System and method for controlling the long term generation rate of compressed data

摘要

The present invention comprises a system and method for controlling the rate a data encoder generates compressed data. The system and method are preferably implemented as program code stored and executed by a processor or computer that is interfaced to standard variable or constant bit rate encoders known in the art. The system preferably encodes and compresses video signals received from a camera, and controls the rate at which the compressed data is generated by the encoder so that storage capacity reserved for the compressed data will not be exceeded. The device preferably takes advantage of periods when the data generation rate is low to increase the quality of video data generated during periods of high activity.

主权项

1. A method of controlling an amount of generated video data, the method comprising:
measuring an amount of compressed data generated by a video encoder; and calculating a bit rate setpoint, wherein the hit rate setpoint comprises a difference between a desired storage bit rate multiplied by a first weighting factor and the measured amount of compressed data multiplied by a second weighting factor, and further wherein the first weighting factor is equal to a total number of the time periods plus one and the second weighting factor is equal to an inverse of a total duration of the one or more time periods.