In an encoding process, video data are represented as a bitstream of quantized base data and enhancement data, which capture the difference between a quantized base video picture and an original unquantized input video picture. Due to bandwidth constraints on a communication channel, it may be unfeasible...http://www.google.com/patents/US7082221?utm_source=gb-gplus-sharePatent US7082221 - Bandwidth determination for multiple layer digital video
