Patent ID: 8428148
Filing Date: 2013-04-23
Classification: H04N

Abstract:
1. A video and audio bit rate control system which controls a bit rate of a video signal and an audio signal input from a plurality of information sources, comprising: a plurality of encoders which receives said video signal and said audio signal from said plurality of information sources respectively, wherein said encoder outputs a degree of difficulty in encoding said video signal based on an amount of information on said video signal and encodes said video signal and said audio signal at an instructed video bit rate and an instructed audio bit rate; an encoder control device which instructs said audio bit rate to each of said encoders for encoding said audio signal in said plurality of encoders respectively, and outputs a differential bit rate between an audio bit rate assigned fixedly in advance and a total audio bit rate instructed to each of said encoders, when said total audio bit rate instructed to each of said encoders is lower than said audio bit rate assigned fixedly in advance; and a statistical multiplex control device which receives said differential bit rate from said encoder control device and said degree of difficulty in encoding from each of said plurality of encoders, adds said differential bit rate and a video bit rate assigned in advance to obtain a total bit rate, divides the total bit rate to obtain a video bit rate information for assigning to each of encoders, based on said degree of difficulty in encoding, and provides said video bit rate information to each of said encoders for encoding said video signal in said plurality of encoders respectively.