IMAGE PREDICTIVE ENCODING AND DECODING DEVICE

摘要

An image predictive encoding device can efficiently encode an image, while suppressing an increase in prediction information and reducing the prediction error of a target block. In an image predictive encoding device, according to one embodiment, to produce a prediction signal of a partition in a target region, it is decided whether prediction information of a neighbouring region can be used. When prediction information of the neighbouring region can be used, a region width of the partition where the prediction information of the neighbouring region is used to produce the prediction signal is determined. The prediction signal of the target region is produced from a reconstructed signal based on at least one of the region width, the prediction information of the target region, and the prediction information of the neighbouring region. The prediction information, information identifying the region width, and a residual signal are encoded.

主权项

1. An image predictive decoder comprising:
a data analyzer configured to extract, from compressed data representing a plurality of encoded blocks, encoded residual signals and prediction information comprising motion vector information and reference picture information for generating prediction signals of at least some of encoded blocks; a prediction signal generator configured to generate prediction signals of first and second target blocks, wherein the prediction signal generator is configured to
(I) adopt prediction information of a neighboring region located adjacent to the first block and generate a first prediction signal of the first target block, using only motion vector information and reference picture information of the neighboring region, and(II) a second prediction signal of the second target block, using only motion vector information and reference picture information of the second target block; a decoding section configured to restore a first residual signal of the first target block and a second residual signal of the second target block from the encoded residual signals; an adder configured to add the first and second residual signals, respectively, with the first and second prediction signals to generate a first reconstructed signal of the first target block and a second reconstructed signal of the second target block; and a memory configured to stores the first and second reconstructed signals.