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AssigneeSiemens Aktiengesellschaft
InventorWieland Jass
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A method for reducing what are referred to as blocking artifacts in a video scene coding with discrete cosine transformation (DCT) at a low data rate is provided in a video signal transmission system, having a transmit-side video signal input to which a video signal to be transmitted is supplied. A transmit-side coder transmits frequency limitation parameters allocated to the individual blocks of the video signal to be divided into a plurality of blocks at a receive-side decoder, via a transmission channel, together with a block-associated video sub-signal that is coded by the coder. The frequency limitation parameters are used at the receive side to control a block filter function at the output of the decoder that outputs a decoded video signal, controlling this for postprocessing of the decoded video signal for the purpose of reducing the blocking artifacts.
A method for reducing blocking artifacts in a video scene coding with discrete cosine transformation (DCT) at a low data rate, characterized by the steps of
A method for reducing blocking artifacts in a video scene coding with discrete cosine transformation (DCT) at a low data rate, characterized by the steps of
The method according to one of the preceding claims, characterized by the step, for the control of the block filter function in the correction region of two neighboring image blocks, of employing the respectively greater of the frequency limitation parameters allocated to each individual image block (N.sub.1 for image Block 1;
Dependencies are inferred from the claim text.