| 摘要 |
A method, program product and device for encoding and/or decoding video data can include treating coefficients in the enhancement layer corresponding to a non-zero coefficient in the base layer differently than a coefficient in the enhancement layer corresponding to a zero coefficient in the base layer. The sign of the base layer quantized coefficient can also be used as it indicates how the reconstructed error differs from the original signal. The coefficient of independent spatial transforms can be arranged into subbands and the encoding of the subbands can utilize spatial information and coded block flags and end of block flags to reduce bit rate. Rather than feeding the coefficients into a context-based adaptive binary arithmetic coding engine on a block-by-block basis, the subbands can be passed into the engine. Subband coefficients may be removed in a controlled manner, leading to a reduced bit-rate.
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