Patent ID: 6501797
Filing Date: 2002-12-31
Classification: H04N

Abstract:
For use in a video encoder comprising: 1) a base layer circuit capable of receiving an input stream of video frames and generating therefrom compressed base layer video frames suitable for transmission at a base layer bit rate to a streaming video receiver, and 2) an enhancement layer circuit capable of receiving said input stream of video frames and a decoded version of said compressed base layer video frames and generating therefrom enhancement layer video data associated with, and allocated to, corresponding ones of said compressed base layer video frames and suitable for transmission at a modifiable enhancement layer bit rate to said streaming video receiver, an apparatus for controlling transmission of said enhancement layer video data comprising:a base layer parameter monitor capable of receiving at least one base layer parameter and, in response thereto, developing a rate allocation output and modifying an allocation of said enhancement layer video data among said corresponding ones of said compressed base layer video frames.