Patent ID: 9571837
Date: 2017-02-14
CPC Classifications: H04N

Claim:
1. A method comprising: selecting, in a mode decision phase of an encoding of a video frame, to encode an output bit stream in skip mode; setting unquantized luma component transform coefficients for a coding unit of the video frame to zero responsive to selecting the skip mode; re-evaluating the selection of the skip mode based on quantized chroma coefficients and independent of the unquantized luma component transform coefficients of the coding unit, the quantized chroma coefficients generated from transformed and quantized residual chroma components; confirming the selection of the skip mode when there are no non-zero quantized chroma coefficients; and revoking the selection of the skip mode when there are non-zero quantized chroma coefficients, wherein the non-zero quantized chroma coefficients are transmitted for the coding unit when the selection of the skip mode is revoked.