Digital video line-by-line dynamic rate adaptation

摘要

The present invention provides a method and apparatus for compressing video data for wireless transmission. The invention continually monitors the output of a video data encoder and maintains a running average for the data output rate over multiple lines of video data. The encoder compresses video data on a line-by-line basis. The invention also monitors the occupancy of the data buffer and as well as the performance of the wireless subsystem to determine real time available channel capacity. If the average data rate exceeds the available channel capacity, the invention increases data compression on subsequent lines of video data until the average data rate falls within the channel capacity. If the average data output rate is less than the channel capacity, the invention reduces data compression on subsequent lines of video data until the average data rate increases to match the channel capacity.