Video encoding apparatus and a video decoding apparatus

A video decoding apparatus comprising:

• processing circuitry configured to:
• acquire one or more available blocks having a motion vector from decoded blocks adjacent to a to-be-decoded block and a number of the available blocks;
• select a first block from the one or more available blocks;
• select a plurality of code words based on the number of the available blocks;
• and
• decode selection information specifying the first block from the one or more available blocks using a code table corresponding to the first block from the one or more available blocks, the code table including index and code words corresponding to the index, and the to-be-decoded block by using a motion vector of the first block, wherein a number of the index is determined depending on the number of the available blocks.

A video decoding method comprising:

• acquiring one or more available blocks having a motion vector from decoded blocks adjacent to a to-be-decoded block and a number of the available blocks;
• selecting a first block from the one or more available blocks;
• selecting a plurality of code words based on the number of the available blocks;
• and
• decoding selection information specifying the first block from the one or more available blocks using a code table corresponding to the first block from the one or more available blocks, the code table including index and code words corresponding to the index, and the to-be-decoded block by using a motion vector of the first block, wherein a number of the index is determined depending on the number of the available blocks.

A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method comprising:

• acquiring one or more available blocks having a motion vector from decoded blocks adjacent to a to-be-decoded block and a number of the available blocks;
• selecting a first block from the one or more available blocks;
• selecting a plurality of code words based on the number of the available blocks;
• and
• decoding selection information specifying the first block from the one or more available blocks using a code table corresponding to the first block from the one or more available blocks, the code table including index and code words corresponding to the index, and the to-be-decoded block by using a motion vector of the first block, wherein a number of the index is determined depending on the number of the available blocks.

A video encoding apparatus comprising:

• processing circuitry configured to:
• acquire one or more available blocks having a motion vector from encoded blocks adjacent to a to-be-encoded block and a number of the available blocks;
• select a first block from the one or more available blocks;
• select a plurality of code words based on the number of the available blocks;
• and
• encode selection information specifying the first block from the one or more available blocks using a code table corresponding to the first block from the one or more available blocks, the code table including index and code words corresponding to the index, and the to-be-encoded block by using a motion vector of the first block, wherein a number of the index is determined depending on the number of the available blocks.

A video encoding method comprising:

• acquiring one or more available blocks having a motion vector from encoded blocks adjacent to a to-be-encoded block and a number of the available blocks;
• selecting a first block from the one or more available blocks;
• selecting a plurality of code words based on the number of the available blocks;
• and
• encoding selection information specifying the first block from the one or more available blocks using a code table corresponding to the first block from the one or more available blocks, the code table including index and code words corresponding to the index, and the to-be-encoded block by using a motion vector of the first block, wherein a number of the index is determined depending on the number of the available blocks.

A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method comprising:

• acquiring one or more available blocks having a motion vector from encoded blocks adjacent to a to-be-encoded block and a number of the available blocks;
• selecting a first block from the one or more available blocks;
• selecting a plurality of code words based on the number of the available blocks;
• and
• encoding selection information specifying the first block from the one or more available blocks using a code table corresponding to the first block from the one or more available blocks, the code table including index and code words corresponding to the index, and the to-be-encoded block by using a motion vector of the first block, wherein a number of the index is determined depending on the number of the available blocks.