RHO-DOMAIN METRICS

摘要

Video encoders, systems and methods are described that characterize video encoding processes using a ?-domain deviation metric. The deviation metric represents a weighted difference between actual non-zero coefficients and the expected non-zero coefficients, the actual and expected coefficients corresponding to quantization of a macroblock in a video frame during video encoding of the frame. The deviation metric is used to adjust the video encoding process to obtain an optimized encoding bit rate for a desired video encoding quality by selecting a quantizing parameter based on a normalized value of the deviation metric. The quantizing parameter can be selected from a table indexed using the deviation metric.