Patent ID: 8891616
Filing Date: 2014-11-18
Classification: H04N

Abstract:
1. A method for encoding a video signal having a plurality of frames, comprising: transforming at least a portion of a video signal to produce matrices of transform coefficients; dividing the transform coefficients by at least one quantizer value to generate matrices of quantized transform coefficients; identifying an encoding context including the transformed portion of the video signal, the encoding context including a plurality of recently coded values; determining a cost to entropy encode at least one of a zero value or non-zero value occurring within the encoding context as a zero value based on a probability that a next coded value will be a zero value, wherein the probability is determined using the plurality of recently coded values from the encoding context; using a processor to increase a width of a first range including zero if the cost to entropy encode is less than a threshold value; setting to zero at least one quantized transform coefficient that falls within the first range; and encoding the quantized transform coefficients.