发明名称 |
Picture encoding method and apparatus |
摘要 |
In wavelet transform encoding, high-quality encoding is to be realized by enabling picture quality control from one fractional area to another. An input picture 100 is read out in an amount corresponding to a number of lines required for wavelet transform and buffered in a memory unit 6. The input picture then is wavelet transformed in a wavelet transform unit 2 and quantized in a coefficient quantizing unit 3. 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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申请公布号 |
US2001024530(A1) |
申请公布日期 |
2001.09.27 |
申请号 |
US20010803404 |
申请日期 |
2001.03.09 |
申请人 |
FUKUHARA TAKAHIRO;KIMURA SEIJI |
发明人 |
FUKUHARA TAKAHIRO;KIMURA SEIJI |
分类号 |
H04N7/30;G06K9/36;G06K9/46;G06T9/00;H03M7/30;H03M7/40;H04N7/26;(IPC1-7):G06K9/36;H04B1/66;H04N7/12;H04N11/02;H04N11/04 |
主分类号 |
H04N7/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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