Patent ID: 6999511
Filing Date: 2006-02-14
Classification: H04N

Abstract:
1. An encoder for encoding a sequence of video data, said encoder comprising: storage within a quantizer for holding multiple sets of quantization matrix tables at the same time, wherein said multiple sets of quantization matrix tables comprise separate, independent sets of quantization matrix tables, each set of quantization matrix tables comprising at least one intra matrix table and at least one non-intra matrix table; said quantizer for quantizing said sequence of video data in a single pass using at least one set of quantization matrix tables of said multiple sets of quantization matrix tables; and means for dynamically switching in real time said quantizer during said single pass quantizing from using said one set of quantization matrix tables to using another set of quantization matrix tables of said multiple sets of quantization matrix tables, wherein said dynamically switching occurs without requiring stopping of the encoding process; and means for allowing updating of said one set of quantization matrix tables of said multiple sets of quantization matrix tables within said quantizer while said another set of quantization matrix tables is in use by said quantizer.