Dynamic Image Decoding Device

Abstract

A video decoding apparatus comprising: an acquisition module configured to acquire available blocks having motion vectors and a number of the available blocks from decoded blocks adjacent to a to-be-decoded block, wherein the acquisition module is configured to acquire available blocks from available block candidates based on at least one of a set of candidates' block sizes, a set of their prediction modes and a prediction mode of the to-be- decoded block, wherein the available block candidates are decoded blocks having motion vectors; a selection information decoding module configured to select one code table from a plurality of code tables depending on the number of the available blocks and decode selection information specifying a selection block using the selected code table; a selection module configured to select the selection block from the available blocks according to the selection information; and a video decoding module configured to subject the to-be-decoded block to motion compensated prediction decoding using a motion vector of the selection block. FIG. 11 21283489_ 1 (GHMatters) P88999.AU.9 20 24 25 97 20 04 N ov 2 02 4 A B S T R A C T 2 0 2 4 2 5 9 7 2 0 0 4 N o v 2 0 2 4 202 I 201 204 205 Encoded I Variable length S S 24 206 Video decoder 22 Inverse 27 data 5 signal Demultiplexer Selection orthogonal 5 I Dequantizer information transformer 21 decoder 26 207 S Prediction image 203 generator Prediction 208 module 25 23 209 S Selection module 210 S Frame memory F FIG. 11 20 24 25 97 20 04 N ov 2 02 4 2 0 2 4 2 5 9 7 2 0 0 4 N o v 2 0 2 4 S { V a r i a b l e l e n g t hS D e m u l t i p l e x e r { )S i n f o r m a t i o n 1 2 / 1 3 S S

Claims

1. A video encoding apparatus for subjecting a video image to motion compensated prediction coding, the apparatus comprising:processing circuitry configured to:acquire available blocks having motion vectors and a number of the available blocks from encoded blocks adjacent to a to-be-encoded block;select one block from the available blocks;select one code table from a plurality of code tables based on the number of the available blocks, wherein the selected code table includes the same number of indexes as the number of the available blocks and the same number of code words as the number of the available blocks;encode a flag representing whether a motion vector of an available block is used in motion compensated prediction;encode selection information specifying the selected block using the selected code table and not encode the selection information when the number of the available blocks is 1; andsubject the to-be-encoded block to the motion compensated prediction using a motion vector of the selected block.

2. A video encoding method for subjecting a video image to motion compensated prediction coding, the method comprising:acquiring available blocks having motion vectors and a number of the available blocks from encoded blocks adjacent to a to-be-encoded block;selecting one block from the available blocks;selecting one code table from a plurality of code tables based on the number of the available blocks, wherein the selected code table includes the same number of indexes as the number of the available blocks and the same number of code words as the number of the available blocks;encoding a flag representing whether a motion vector of an available block is used in motion compensated prediction;2024259720   04 Nov 2024encoding selection information specifying the selected block using the selected code table and not encoding the selection information when the number of the available blocks is 1; andsubjecting the to-be-encoded block to the motion compensated prediction using a motion vector of the selected block.

3. A video decoding apparatus for subjecting a video image to motion compensated prediction coding, the apparatus comprising:processing circuitry configured to:acquire available blocks having motion vectors and a number of the available blocks from decoded blocks adjacent to a to-be-decoded block;select one code table from a plurality of code tables based on the number of the available blocks, wherein the selected code table includes the same number of indexes as the number of the available blocks and the same number of code words as the number of the available blocks;decode selection information using the selected code table and not decode the selection information when the number of the available blocks is 1;select one block from the available blocks in accordance with the selection information;decode a flag representing whether a motion vector of an available block is used in motion compensated prediction; andsubject the to-be-decoded block to the motion compensated prediction using a motion vector of the selected block.

4. A video decoding method for subjecting a video image to motion compensated prediction coding, the method comprising:acquiring available blocks having motion vectors and a number of the available blocks from decoded blocks adjacent to a to-be-decoded block;selecting one code table from a plurality of code tables based on the number of the available blocks, wherein the selected code table includes the2024259720   04 Nov 2024same number of indexes as the number of the available blocks and the same number of code words as the number of the available blocks;decoding selection information using the selected code table and notdecoding the selection information when the number of the available blocks is 1;selecting one block from the available blocks in accordance with the selection information;decoding a flag representing whether a motion vector of an availableblock is used in motion compensated prediction; andsubjecting the to-be-decoded block to the motion compensated prediction using a motion vector of the selected block.

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