Patent ID: 9736494
Date: 2017-08-15
CPC Classifications: H04N

Claim:
1. A moving picture prediction encoding device comprising: a block divider configured to divide an input image into a plurality of blocks; a prediction signal generator configured to generate an intra-picture prediction signal of a block correlated with a target block to be encoded using previously reconstructed reference samples located among the plurality of blocks adjacent to the target block; a residual signal generator configured to generate a residual signal between the intra-picture prediction signal of the target block and a pixel signal of the target block; a residual signal compressor configured to compress the residual signal to form compression data of the residual signal; a residual signal restorator configured to decompress the compressed residual signal and generate a reconstructed residual signal; a block storage that stores a reconstructed pixel signal of the target block, wherein the pixel signal of the target block is reconstructed by adding the intra-picture prediction signal with the reconstructed residual signal, wherein the prediction signal generator is further configured to: derive a group of reference samples from a plurality of previously reconstructed blocks stored in the block storage that neighbor the target block, perform interpolation between a first key reference sample located at an end of the group of reference samples and a second key reference sample located at a center of the group of reference samples, and perform interpolation between the second key reference sample and a third key reference sample located at an other end of the group of reference samples to generate interpolated reference samples within the group of reference samples, the first, second and third reference samples located adjacent to the upper and left side of the target block; the prediction signal generator further configured to determine an intra prediction mode, and generate the intra-picture prediction signal by extrapolation of the interpolated reference samples based on the determined intra prediction mode; and an encoding device configured to encode the intra prediction mode together with the compression data of the residual signal.