发明名称 |
Method and apparatus for encoding and decoding an image |
摘要 |
<p>An image memory outputs a target encoding pixel and a plurality of reference pixels in the vicinity thereof. A boundary mode determining unit determines a maximum value and a minimum value of the reference pixels, determines an average value of the maximum value and the minimum value, compares the respective reference pixel values with the average value, detects a boundary in the target encoding pixel and the reference pixels based on comparison results, and detects a pixel distribution state of the reference pixels based on the detected boundary. An adaptive predictor calculates a prediction value by performing a calculation based on a function corresponding to the pixel distribution state and the reference pixels. A prediction difference calculating unit determines a difference value between the prediction value and a value of the target encoding pixel. A prediction coincidence determining unit compares the prediction value and the target encoding pixel value, and outputs a comparison result as a binary signal. A context generator generates a context based on the pixel distribution state and the difference value of the prediction difference calculating unit. An arithmetic encoder encodes the binary signal based on the context thus generated.</p> |
申请公布号 |
AU715514(B2) |
申请公布日期 |
2000.02.03 |
申请号 |
AU19960060648 |
申请日期 |
1996.07.23 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
TOMOHIRO KIMURA;IKURO UENO;TAICHI YANAGIYA;MASAYUKI YOSHIDA;FUMITAKA ONO;NAOTO TANABE |
分类号 |
H04N19/102;G06T9/00;H03M7/36;H04N1/41;H04N19/103;H04N19/134;H04N19/136;H04N19/137;H04N19/182;H04N19/189;H04N19/192;H04N19/196;H04N19/423;H04N19/426;H04N19/50;H04N19/85;H04N19/91;(IPC1-7):H04N7/32 |
主分类号 |
H04N19/102 |
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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