JP2007259022A5

JP2007259022A5 -

Info

Publication number: JP2007259022A5
Application number: JP2006080263A
Authority: JP
Filing date: 2006-03-23
Publication date: 2009-04-09
Anticipated expiration: 2026-03-23

Claims

An image decoding apparatus for decoding encoded image data in which image data is encoded for each frame,
Generating means for generating the image data by decoding the encoded image data for each frame;
Determining whether or not partial image data included in the image data and having a fixed position and brightness in a frame for at least a fixed period is included in a previous frame positioned before the current frame; 1 determination means;
A first difference that is a difference between a luminance value of the partial image data in the previous frame and a luminance value of the partial image data in the current frame and a luminance of a part of the image data excluding the partial image data in the previous frame Second determination means for determining whether at least one of the second differences, which is a difference between a value and a luminance value of a part of the image data excluding the partial image data in the current frame, is greater than or equal to a predetermined threshold value When,
Interpolation means for performing interpolation processing on the image data in the current frame according to the determination results by the first determination means and the second determination means ,
An image decoding apparatus comprising:

The interpolation means determines that the partial image data is included in the previous frame by the first determination means, and determines that the first difference is equal to or greater than the threshold by the second determination means. 2. The image decoding apparatus according to claim 1, wherein interpolation processing is performed on the entire image data of the current frame using the image data in the current frame .

The interpolation means, said partial image data by the first determination unit is determined to be contained in the previous frame, it is determined that and the second the first difference by the determining means have such above the threshold 3. The image decoding apparatus according to claim 2 , wherein interpolation processing is performed on the partial image data in the current frame using the partial image data in the previous frame .

The interpolating means determines that the partial image data is included in the previous frame by the first determining means, and the second difference is not equal to or greater than the threshold value by the second determining means, and the second difference. Is determined to be greater than or equal to the threshold value, an interpolation process is performed on the part of the image data excluding the partial image data in the current frame using the image data in the current frame. The image decoding device according to claim 3.

The second determination means further determines whether or not a third difference that is a difference between the luminance value of the image data in the previous frame and the luminance value of the image data in the current frame is equal to or greater than the threshold value. ,
The interpolation means determines that the partial image data is not included in the previous frame by the first determination means, and determines that the third difference is equal to or greater than the threshold value by the second determination means. 2. The image decoding apparatus according to claim 1, wherein interpolation processing is performed on the entire image data of the current frame using the image data in the current frame .

The image decoding apparatus according to claim 5 , wherein the partial image data indicates an image located at an end of a frame.

A decoding method for decoding encoded image data in which image data is encoded for each frame,
For each frame, a generation step of generating the image data by decoding the encoded image data;
Determining whether or not partial image data included in the image data and having a fixed position and brightness in a frame for at least a fixed period is included in a previous frame positioned before the current frame; 1 determination process;
A first difference that is a difference between a luminance value of the partial image data in the previous frame and a luminance value of the partial image data in the current frame and a luminance of a part of the image data excluding the partial image data in the previous frame A second determination step of determining whether at least one of the second differences, which is a difference between a value and a luminance value of a part of the image data excluding the partial image data in the current frame, is equal to or greater than a predetermined threshold When,
An image decoding method comprising: an interpolation step for performing an interpolation process on the image data in the current frame in accordance with a determination result in each of the first determination step and the second determination step.

An image decoding apparatus that decodes encoded image data obtained by encoding image data for each frame, wherein the generation unit generates the image data by decoding the encoded image data for each frame, and A first determination is made as to whether or not partial image data that is included in image data and whose position and brightness in a frame are fixed for at least a fixed period is included in a previous frame positioned before the current frame. Determining means; a first difference that is a difference between a luminance value of the partial image data in the previous frame and a luminance value of the partial image data in the current frame; and the image data excluding the partial image data in the previous frame A second difference that is a difference between a part of luminance values and a part of luminance values of the image data excluding the partial image data in the current frame; One without the, second determining means for determining whether more than a predetermined threshold value, said on the image data in the current frame, the determination result of each of the first judging means and the second judging means A computer program for controlling a computer provided in an image decoding device comprising interpolation means for performing interpolation processing according to
A computer program that causes the computer to function as at least a part of the generation unit, the first determination unit, the second determination unit, the interpolation unit, and the control unit.