JP2008283481A5

JP2008283481A5 -

Info

Publication number: JP2008283481A5
Application number: JP2007125956A
Authority: JP
Filing date: 2007-05-10
Publication date: 2010-06-24
Anticipated expiration: 2027-05-10

Claims

An image processing apparatus that encodes a frame of a moving image in units of blocks,
Generating means for generating a plurality of prediction images corresponding to each of a plurality of prediction modes when the block to be encoded is intra-frame encoded;
For each of the plurality of prediction modes, the encoding from the block and the predicted image corresponding to the prediction mode to obtain the value of the position of the pixel corresponding to the prediction mode target, the difference between the value of the acquired pixel A calculation means for calculating an evaluation value indicating
An image processing apparatus comprising: setting means for setting a prediction mode when the block to be encoded is intra-frame encoded based on an evaluation value corresponding to each of the plurality of prediction modes.

An image processing apparatus that encodes a frame of a moving image in units of blocks,
A plurality of the plurality of predicted images corresponding to the prediction mode, respectively, a first generation means for generating a pixel at a position corresponding to each prediction mode in the case of intraframe coding the block to be coded,
For each of the plurality of prediction modes, a pixel value at a position corresponding to the prediction mode is acquired from the encoding target block, and is acquired according to the pixel value generated according to the prediction mode and the prediction mode. Calculating means for calculating an evaluation value indicating a difference between the values of the selected pixels;
Based on evaluation values corresponding to each of the plurality of prediction modes, setting means for setting a prediction mode when the block to be encoded is intra-frame encoded ,
An image processing apparatus comprising: a second generation unit configured to generate a prediction image in the set prediction mode.

The second generation unit generates a pixel other than the position according to the set prediction mode, and the prediction image of the set prediction mode from the generated pixel and the pixel generated by the first generation unit 3. The image processing apparatus according to claim 2, wherein:

Said pixel positions corresponding to the prediction mode, the prediction direction of the pixels in the prediction mode, the prediction image claims 1 to 3, characterized in that a pixel located farthest from the pixels used for generating the The image processing device described in any one of the above.

An image processing apparatus that encodes a frame of a moving image in units of blocks,
Obtaining means for obtaining prediction mode information of a plurality of encoded blocks adjacent to a block to be encoded;
First generation means for generating a first predicted image when the block to be encoded is intra-frame encoded according to the prediction mode indicated by the prediction mode information;
First calculation means for calculating a first evaluation value indicating a difference between a value of a corresponding pixel of the block to be encoded and the first predicted image;
Selection means for selecting one of the prediction modes of the plurality of encoded blocks based on the first evaluation value;
Second generation means for generating a second predicted image when the block to be encoded is intra-coded by a prediction mode having a prediction direction adjacent to the prediction direction of the pixel in the selected prediction mode ; ,
Second calculation means for calculating a second evaluation value indicating a difference between the value of the corresponding pixel of the block to be encoded and the second predicted image;
An image processing apparatus comprising: a setting unit that sets a prediction mode when the block to be encoded is intra-frame encoded based on the first and second evaluation values.

When the first evaluation value is less than a predetermined threshold, the setting unit sets the prediction mode selected by the selection unit as a prediction mode when the block to be encoded is encoded in the frame. 6. The image processing apparatus according to claim 5, wherein the image processing apparatus is characterized.

If there is no prediction mode having a prediction direction adjacent to the prediction direction of the pixel in the selected prediction mode, the setting means selects the selection mode as a prediction mode when the block to be encoded is encoded in the frame. 6. The image processing apparatus according to claim 5, wherein the prediction mode selected by is set.

When the selected prediction mode is a DC prediction mode, the second generation unit generates the second prediction image using prediction modes in which the prediction direction is a vertical direction and a horizontal direction. 8. The image processing device according to claim 5, wherein the image processing device is an image processing device.

An image processing apparatus that encodes a frame of a moving image in units of blocks,
Acquisition means for acquiring a value of a pixel in a predetermined position of the block to be coded,
An image processing apparatus comprising: a setting unit configured to set a prediction mode when the coded block is subjected to intra-frame coding based on a combination of pixel values at the predetermined position .

An image processing apparatus that encodes a frame of a moving image in units of blocks,
Obtaining means for obtaining a value of a pixel at a predetermined position of a block to be encoded;
Selection means for selecting a plurality of prediction modes when the coding block is intra-frame-encoded based on a combination of pixel values at the predetermined position ;
Generating means for generating a plurality of prediction images corresponding to each of the plurality of prediction modes;
For each of the plurality of prediction modes, and calculating means for calculating an evaluation value indicative of a difference between, the corresponding pixel value of the predicted image corresponding to the block and the prediction mode of the encoding target,
An image processing apparatus comprising: setting means for setting a prediction mode when the block to be encoded is intra-frame encoded based on an evaluation value corresponding to each of the plurality of prediction modes.

The pixel at the predetermined position is a pixel at the four corners of the block, and the selecting means predicts a prediction direction having a prediction direction in which a difference between two pixel values matches a minimum direction among combinations of the pixel values at the four corners. 11. The image processing apparatus according to claim 10, wherein a mode and a prediction mode having a prediction direction adjacent to the prediction direction are selected.

An image processing method of an image processing apparatus that includes a generation unit, a calculation unit, and a setting unit, and encodes a frame of a moving image in units of blocks,
The generation means generates a plurality of prediction images corresponding to a plurality of prediction modes when the block to be encoded is intra-frame encoded,
Said computing means, for each of the plurality of prediction modes, to obtain the value of the position of the pixel corresponding to the prediction mode from the prediction image corresponding to the block and the prediction mode of the encoding target, the pixels the acquired Calculate an evaluation value indicating the difference between the values,
The image processing method , wherein the setting means sets a prediction mode when the block to be encoded is intra-frame encoded based on an evaluation value corresponding to each of the plurality of prediction modes.

An image processing method of an image processing apparatus that includes first and second generation means, calculation means, and setting means, and encodes a frame of a moving image in units of blocks,
Said first generating means generates a plurality of predicted image, a pixel position corresponding to each prediction mode corresponding to a plurality of prediction modes each case of intraframe coding the block to be coded,
The calculation means acquires, for each of the plurality of prediction modes, a pixel value at a position corresponding to the prediction mode from the block to be encoded, and the pixel value generated according to the prediction mode and the prediction the evaluation value is calculated indicative of a difference between values of pixels obtained in accordance with the mode,
The setting means sets a prediction mode when the block to be encoded is intra-coded based on an evaluation value corresponding to each of the plurality of prediction modes,
The image processing method, wherein the second generation unit generates a prediction image of the set prediction mode.

An image processing method of an image processing apparatus having an acquisition unit, a first and a second generation unit, a first and a second calculation unit, a selection unit, and a setting unit, and which encodes a frame of a moving image in units of blocks. And
The acquisition unit acquires prediction mode information of a plurality of encoded blocks adjacent to a block to be encoded,
The first generation unit generates a first prediction image when the block to be encoded is intra-frame encoded according to a prediction mode indicated by the prediction mode information,
The first calculation means calculates a first evaluation value indicating a difference between a value of a corresponding pixel of the block to be encoded and the first predicted image;
The selecting means selects one of the prediction modes of the plurality of encoded blocks based on the first evaluation value;
A second prediction image in the case where the second generation unit performs intra-frame encoding of the block to be encoded by a prediction mode having a prediction direction adjacent to a prediction direction of a pixel in the selected prediction mode . Generate
The second calculation means calculates a second evaluation value indicating a difference between a value of a corresponding pixel of the block to be encoded and the second predicted image;
The image processing method characterized in that the setting means sets a prediction mode when the block to be encoded is intra-frame encoded based on the first and second evaluation values.

An image processing method of an image processing apparatus that has an acquisition unit and a setting unit and encodes a frame of a moving image in units of blocks,
The acquisition unit acquires a value of a pixel at a predetermined position of a block to be encoded,
The image processing method characterized in that the setting means sets a prediction mode when the coded block is subjected to intra-frame coding based on a combination of pixel values at the predetermined position .

An image processing method having an acquisition unit, a selection unit, a generation unit, a calculation unit, and a setting unit, and encodes a frame of a moving image in units of blocks,
The acquisition unit acquires a value of a pixel at a predetermined position of a block to be encoded,
The selection means selects a plurality of prediction modes when the encoded block is intra-frame encoded based on a combination of pixel values at the predetermined position ;
The generating unit generates a plurality of prediction images corresponding to the plurality of prediction modes;
It said computing means, for each of the plurality of prediction modes, the prediction image corresponding to the block and the prediction mode of the encoding target, and calculates an evaluation value indicative of a difference between the value of the corresponding pixel,
The image processing method , wherein the setting means sets a prediction mode when the block to be encoded is intra-frame encoded based on an evaluation value corresponding to each of the plurality of prediction modes.

12. A program for causing a computer to function as each unit of the image processing apparatus according to claim 1.

Computer-readable record medium, characterized in that the programs listed are recorded to claim 17.