JP2005354673A5

JP2005354673A5 -

Info

Publication number: JP2005354673A5
Application number: JP2005138723A
Authority: JP
Filing date: 2005-05-11
Publication date: 2009-11-12
Anticipated expiration: 2025-05-11

Claims

A motion compensation device that performs motion compensation between blocks constituting a moving image in units of blocks,
And a local memory that exist independently from the picture memory storing reference pictures are transferred from the picture memory stores reference pixel data of the partial region of the reference picture,
Area specifying means for specifying, as the partial area, a transfer area including a reference area required for motion compensation of the plurality of blocks from among the reference pictures stored in the picture memory ;
Reference pixel transfer means for transferring reference pixel data of the transfer area specified by the area specifying means among the reference pictures stored in the picture memory from the picture memory to the local memory;
A motion compensation device comprising: motion compensation means for performing motion compensation of the plurality of blocks using reference pixel data of the reference region included in the transfer region stored in the local memory.

The motion compensation device according to claim 1, wherein the reference pixel transfer unit switches whether to transfer the transfer area at a time or to transfer for each block based on the number of pixels in the transfer area.

When the number of pixels in the transfer area does not exceed a predetermined threshold, the reference pixel transfer means transfers the reference pixel data in the transfer area in a batch, and the number of pixels in the transfer area exceeds a predetermined threshold The motion compensation device according to claim 2, wherein the reference pixel data of the transfer area is transferred for each block.

The reference pixel transfer means is necessary for motion compensation by limiting a transfer unit between the picture memory and the local memory to a reference area required for motion compensation in one of the blocks as the predetermined threshold. 4. The motion according to claim 3, wherein the number of pixels in an area including an unnecessary area that is not transferred at the same time is a value that is equal to or greater than a sum total of the plurality of blocks that are candidates for batch processing. Compensation device.

The reference pixel transfer means determines whether or not a plurality of the blocks refer to the same reference picture, and transfers reference pixel data in the transfer area for each block when not referring to the same reference picture. The motion compensator according to claim 1.

The region specifying unit transfers the transfer region in a batch or transfers each block based on at least one of a motion vector, a block size, and a decimal precision pixel generation method corresponding to a plurality of the blocks. The motion compensation device according to claim 1, wherein the motion compensation device is switched.

The region specifying means is based on whether the vector values of the reference picture and the motion vector corresponding to the plurality of blocks are the same,
The motion compensation device according to claim 1, wherein when the vector values of the reference picture and the motion vector are the same, a determination is made to transfer a plurality of blocks at once without performing the transfer for each block.

The motion compensation apparatus according to claim 1, wherein the area specifying unit specifies the transfer area as at least one rectangular area.

The motion compensation apparatus according to claim 1, wherein the local memory stores only reference pixel data of the reference area included in the transfer area transferred from the picture memory.

The motion compensation apparatus according to claim 1, wherein the reference pixel transfer unit actually transfers only a transfer unit between the picture memory and the local memory including the reference area in the transfer area. .

The motion compensation apparatus according to claim 1, wherein the motion compensation unit further performs a filter operation for generating decimal precision pixel data using the reference pixel data stored in the local memory.

The motion compensation device according to claim 11, wherein the motion compensation unit collectively performs the filter operation on the reference pixel data stored in the local memory for each transfer area.

The motion compensation means performs a filter operation on the reference pixel data stored in the local memory only with respect to a necessary filter area in which motion compensation with decimal pixel accuracy is required in any of the blocks. The motion compensation apparatus according to claim 12, wherein

The motion compensation device further includes:
First filter calculation means for performing a part of filter calculation for generating decimal precision pixel data between the picture memory and the local memory;
The motion compensation device according to claim 11, wherein the motion compensation unit performs the remaining filter computations that are not performed by the first filter computation unit.

A motion compensation method for performing motion compensation in units of blocks between pictures constituting a moving image,
An area specifying step for specifying, as a partial area of the reference picture, a transfer area including a reference area required for motion compensation of the plurality of blocks from among the reference pictures stored in a picture memory ;
Wherein a said partial region of said reference picture stored in the picture memory, the reference pixel data of the transfer region specified in said region specifying step, from the picture memory, independently of the picture memory A reference pixel transfer step for transferring to existing local memory;
And a motion compensation step of performing motion compensation of the plurality of blocks using reference pixel data of the reference area included in the transfer area stored in the local memory.

An integrated circuit for performing motion compensation on a block basis between pictures constituting a moving image,
And a local memory that exist independently from the picture memory storing reference pictures are transferred from the picture memory stores reference pixel data of the partial region of the reference picture,
Area specifying means for specifying, as the partial area, a transfer area including a reference area required for motion compensation of the plurality of blocks from among the reference pictures stored in the picture memory ;
Reference pixel transfer means for transferring reference pixel data of the transfer area specified by the area specifying means among the reference pictures stored in the picture memory from the picture memory to the local memory;
An integrated circuit comprising: motion compensation means for performing motion compensation of the plurality of blocks using reference pixel data of the reference region included in the transfer region stored in the local memory.