Image predictive encoding device and method and image predictive decoding device and method

Abstract

An image predictive coding device and method, and an image predictive decoding device and method. The image predictive encoding device includes: a region division unit that divides an input image into a plurality of regions; a prediction signal generation unit that targets a target region to be processed among the plurality of regions divided by the region division unit. a pixel signal for generating a predicted signal; a residual signal generating unit for generating a residual signal of the predicted signal generated by the predicted signal generating unit and the target pixel signal; and an encoding unit for generating the residual signal from the residual signal The residual signal generated by the unit is encoded to generate compressed data, and the predicted signal generation unit generates a texture signal based on the adjacent area composed of the reproduced pixel signal adjacent to the target pixel signal, using a predetermined texture The synthesis method processes the generated texture signal to generate a prediction signal.

Description

[0001] The patent application of the present invention is titled "image predictive encoding device, image predictive encoding method, image predictive encoding program, image predictive decoding device, image predictive decoding method, and image predictive decoding program", and the filing date is April 23, 2007. A divisional application of the invention patent application with the international application number "PCT / JP2007 / 058723" and the national application number "200780015355.6". technical field [0002] The present invention relates to an image predictive encoding device, an image predictive encoding method, an image predictive encoding program, an image predictive decoding device, an image predictive decoding method, and an image predictive decoding program, in particular to an image predictive encoding device for predictive encoding and decoding using a texture synthesis method, An image predictive encoding method, an image predictive encoding program, an image predi...

AI Technical Summary

Problems solved by technology

However, in bidirectional prediction, two motion vectors need to be coded in order to generate two prediction signals on the reproduction side. Therefore, when the number of averaged signals is increased to improve the smoothing effect of the prediction signal, the motion vector to be coded will also increase the number of

[0015] In addition, when an intra-screen prediction signal is generated by using the method of generating a prediction signal based on extrapolation adopted in the prior art, there is a problem that the prediction accuracy for pixels far from the boundary of the target block decreases.

and, Figure 18 The shown method of stretching pixel values ​​in a geometric direction has the problem of not being able to efficiently predict image signals with complex texture signals (patterns)

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