BIT-RATE GUIDED FREQUENCY WEIGHTING MATRIX SELECTION

摘要

A system (10) and method for generating a frequency weighted (FW) matrix (22) for use in a Fine-Granularity-Scalability (FGS) video coding system. The system comprises: a system (16) for plotting the average discrete cosine transform (DCT) residuals versus the zigzag DCT scan line locations for a sample video frame encoded both at a predetermined base layer bit-rate and at approximately three times the predetermined base layer bit-rate; a system (18) for generating the difference plot of DCT residuals versus the zigzag DCT scan line locations for the video frame encoded at both the predetermined base layer bit-rate and at approximately three times the predetermined base layer bit-rate; and a system (20) for matching and normalizing a staircase curve to the average difference plot, wherein the staircase curve values can be further mapped into the weights for the FW matrix.