JP2009296363A5

JP2009296363A5 -

Info

Publication number: JP2009296363A5
Application number: JP2008148324A
Authority: JP
Filing date: 2008-06-05
Publication date: 2011-07-21
Anticipated expiration: 2028-06-05

Claims

One screen is divided into coding blocks which are coding units, the coding block is divided into motion compensation blocks, and at least past images are included in the motion compensation block included in the coding block to be coded. A motion vector search device for searching for a motion vector with reference to
A dividing unit configured to divide the encoding block to be encoded by a plurality of different setting division methods to form a motion compensation block corresponding to the division method;
Motion vector search means for searching for the motion vector according to a set search accuracy for each of the motion compensation blocks formed by the dividing means by the plurality of different dividing methods;
Selecting the division method based on the search result of the motion vector based on the search accuracy by the motion vector search means, the selected division method, and a predetermined division method among the plurality of different division methods; and sets to the dividing means, and setting means for setting a high search accuracy is good Ri accuracy as the search accuracy,
The division means and the search accuracy are set by the setting means, and the motion vector search means is controlled to sequentially repeat the motion vector search operation according to the set division method and the search accuracy. Control means,
The control means includes
If it is determined that the higher-accuracy search accuracy set by the setting unit has been set to a preset search accuracy by the repeated operation, based on the motion vector search result by the motion vector search unit, One division method is selected from the division method selected based on the search result and the predetermined division method, and a motion vector obtained as a search result of the motion vector by the selected division method is finally obtained. A motion vector search apparatus characterized in that a motion vector is used.

The setting means includes
2. The division method according to claim 1, wherein one of the division methods is selected based on a result of the motion vector search and set in the division unit, and one predetermined division method is set in the division unit. Motion vector search device.

The setting means includes
A group is assigned to each of the plurality of motion compensation blocks formed by the plurality of different division methods according to the division method, and the division method is selected for each group based on the result of the motion vector search. The motion vector search apparatus according to claim 1, wherein the dividing unit is set and the predetermined dividing method is set in the dividing unit.

The setting means is provided for each group.
4. The division method according to claim 3, wherein one of the division methods is selected based on a result of the motion vector search and set in the division unit, and one predetermined division method is set in the division unit. Motion vector search device.

In the predetermined division method, a search result of the motion vector performed on each of the motion compensation blocks formed by dividing the encoding block to be encoded by the plurality of different division methods is obtained as a plurality of image data. 5. The motion vector search apparatus according to claim 1, wherein the motion vector search apparatus is determined based on a result obtained by performing a statistical process on the stored search result.

One screen is divided into coding blocks which are coding units, the coding block is divided into motion compensation blocks, and at least past images are included in the motion compensation block included in the coding block to be coded. A motion vector search method for searching for a motion vector with reference,
A dividing step in which a dividing unit divides the encoding block to be encoded by a plurality of different dividing methods set to form a motion compensation block corresponding to the dividing method;
A motion vector search step for searching for the motion vector according to a set search accuracy for each of the motion compensation blocks formed in the division step by the plurality of different division methods;
The setting means selects the division method based on a result of the motion vector search based on the search accuracy in the motion vector search step, and the selected division method and a predetermined one of the plurality of different division methods a setting step of the a dividing method and sets to the dividing step, setting a high search accuracy is good Ri accuracy as the search accuracy,
The control means sequentially repeats the operation of setting the division method and the search accuracy in the setting step, and searching for the motion vector in the motion vector search step according to the set division method and the search accuracy. A control step for controlling
The control step includes
If it is determined that the higher-precision search accuracy set in the setting step has reached a preset search accuracy by the repeated operation, based on the motion vector search result in the motion vector search step, One division method is selected from the division method selected based on a search result and the predetermined division method, and a motion vector obtained as a search result of the motion vector by the selected division method is finally obtained. A motion vector search method characterized in that a motion vector is used.