System and method for video encoding

A video encoding system, a video sequence comprising N subsequences and each of the subsequences comprising a plurality of frames, said video encoding system being used to encode the jth frame in the ith subsequence and all previous frames 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 in the ith subsequence, said system comprising:

• a quantization scale generator for generating, based on the encoded frames, an initial quantization scale;
• an encoder, coupled to the quantization scale generator, for encoding the jth frame in the ith subsequence in a first encoding mode based on the initial quantization scale;
• and
• a scene change detector, coupled to the encoder, for determining if the jth frame in the ith subsequence is a scene change relative to the (j−1)th frame in the ith subsequence;
• where the quantization scale generator generates an adjusted quantization scale based on the initial quantization scale and the encoder re-encodes the jth frame in the ith subsequence in a second encoding mode if the jth frame in the ith subsequence is a scene change.