| 摘要 |
The versatile method of spatial and SNR scalable picture compression comprises: high resolution encoding ( 202 a) an input picture (vi) yielding high resolution encoded data (coIIR,LQ), being the base data; deriving a first down-scaled representative picture (p 1 ) on the basis of the high resolution encoded data (coHR,LQ); deriving a second down-scaled representative picture (p 2 ) on the basis of the input picture (vi); and lower resolution encoding ( 214 ) lower resolution quality enhancement data (coMR,MQ), usable for improving the visual quality of a picture reconstructable from the high resolution encoded data (coIIR,LQ), on the basis of comparing the first down-scaled representative picture (p 1 ) with the second down-scaled representative picture. This enables good bit-rate distribution for multi-resolution, multi-quality users.
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