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Adaptive filter for reducing coding artefacts - uses dual transformation coding with threshold zeroing coeffts. followed by decoding and subtraction
Adaptive filter for reducing coding artefacts - uses dual transformation coding with threshold zeroing coeffts. followed by decoding and subtraction
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机译:减少编码伪像的自适应滤波器-使用具有阈值归零系数的双重变换编码。然后进行解码和减法
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摘要
Samples of the decoded binary signal are fed to a high pass circuit (1). The high-pass decoded signal is fed to an encoder (2) which carries out a transformation coding with it, by which the block structure and the transformation is the same as that of coding the decoded binary signal. A threshold circuit (3) sets each transformation coefficient of a block to zero where it is greater than the half-quantisation step used for this block in the coding of the decoded binary signal. A decoder (4) after the thresholder decodes the signal. The output data from this decoder are fed to a subtractor (5) also receiving the decoded binary signal. ADVANTAGE - No reduction of information content.
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