Patent ID: 8018997
Filing Date: 2011-09-13
Classification: H04N

Abstract:
1. A video encoding method, a video sequence comprising N subsequences which each comprises a plurality of frames, said method functioning encoding the jth frame in the ith subsequence, frames previous to the jth frame in the ith subsequence having been encoded, N being a natural number, i being an integer index ranging from 1 to N, j being an integer index ranging from 2 to the number of the frames of the ith subsequence, said method comprising the steps of: (a) based on the encoded frames, generating an initial quantization scale, wherein the initial quantization scale is determined by a predicted quantization scale and a differential quantization scale, and, wherein the predicted quantization scale Q where X (b) encoding the jth frame in the ith subsequence in a first encoding mode in accordance with the initial quantization scale; (c) defining a detection area in the current jth frame, and determining whether the jth frame in the ith subsequence is a scene change relative to the (j−1)th frame in the ith subsequence within the detection area which is smaller than the frame; and (d) when YES in step (c), based on the initial quantization scale, generating an adjusted quantization scale, and re-encoding the jth frame in the ith subsequence in a second encoding mode in accordance with the adjusted quantization scale.