Digital video signal inter-block interpolative predictive encodi

Details Digital video signal inter-block interpolative predictive encodi Digital video signal inter-block interpolative predictive encodi

1998-07-30

2000-12-05

Britton, Howard

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

3484091, 3484111, H04B 166, H04N 734

Patent

active

06157676&

ABSTRACT:
An image encoding apparatus for application to images expressed as respective frames of a digital video signal, whereby an image is converted into an array of blocks with specific blocks predetermined as being independent internally encoded blocks and the remainder as predictively encoded blocks, with predicted pixel signal values for a predictively encoded block being derived by interpolation from pixel signal values of at least one pair of blocks which have been already encoded and enclose that predictively encoded block along the row or column directions or both the row and column directions. Encoding efficiency is enhanced by applying Discrete Sine Transform processing along the interpolation direction, when encoding an array of prediction error signal values derived for a block, and by executing adaptive prediction by determining an optimum interpolation direction, when there are two possible directions for deriving predicted pixel signal values for a block.

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"An Image Data Compression Method Using Extrapolative Prediction-Descrete Sine Transform; in the Case of Two-Dimensional Coding" by Yamane et al; Conference on Electronic Information Communication document (B) vol. J71-B, No. 6; Jun., 1998; pp., 717-724.

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