Block area wavelet transform picture encoding apparatus

Details Block area wavelet transform picture encoding apparatus Block area wavelet transform picture encoding apparatus

2005-07-26

2008-11-18

Chen, Wenpeng (Department: 2624)

Image analysis

Image compression or coding

Pyramid, hierarchy, or tree structure

Reexamination Certificate

active

07454075

ABSTRACT:
In wavelet transform encoding, high-quality encoding is to be realized by enabling picture quality control from one fractional area to another. An input picture100is read out in an amount corresponding to a number of lines required for wavelet transform and buffered in a memory unit6.The input picture then is wavelet transformed in a wavelet transform unit2and quantized in a coefficient quantizing unit3.In quantizing wavelet transform coefficients, the wavelet transform coefficients are multiplied by weighting coefficients from one sub-band to another. The weighting coefficients are determined using the analysis information of a specified block area in a picture, such as motion information and texture fineness information. This enables fine quantization control in terms of a picture block as a unit.

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