| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of coding/decoding digital media.SOLUTION: A digital media encoder/decoder uses a flexible quantization technique that provides the ability to vary quantization along various dimensions of the encoded digital media data, including spatial and frequency subbands and color channels. A codec utilizes a signaling scheme to signal various permutations of flexible quantization combinations efficiently for primary usage scenarios. When choice of a quantizer is available, the codec efficiently encodes the current quantizer by defining a subset of quantizers and indexes the current quantizer from the set. |
