US 2003/0152279 A1 · Image coding apparatus and image coding method

Abstract

An image coding apparatus includes a coding unit 100 for generating a code A, a coding unit 110 for generating a code B, an image reproduction unit 200, an image reproduction memory 204, and a motion vector detection unit 300. The motion vector detection unit 300 detects a motion vector using an image in the image reproduction memory 204, whereby the coding unit 100 generates the code A, while the image reproduction unit 200 reconstructs an image on the basis of output from the coding unit 100 and stores the image in the image reproduction memory 204. In the operation for generating the code B, the coding unit 110 is employed as a coding unit for generating the code B, while commonly employing the image reproduction memory 204, the motion vector detection unit 300, and the image reproduction unit 200 as employed in the generation operation for code A.

Claims13

Dependent claims

An image coding apparatus that outputs plural codes for one coding target image, utilizing motion compensation inter-frame prediction, including:

a motion vector detection unit for dividing the coding target image into predetermined blocks and extracting a block in a search image, having a highest correlation with each of the predetermined blocks, thereby to detect a first motion vector for each of the predetermined blocks;
N (N is an integer equal to two or larger than two) pieces of coding units for coding the first motion vector as well as performing motion compensation inter-frame prediction using an image in a position indicated by the first motion vector in the search image and the coding target image, in accordance with coding parameters which are given from outside, thereby to generate coded data;
an image reproduction unit for reconstructing an image using coded data which is outputted from one of the coding units;
and
a reproduced image memory for storing the image reconstructed by the image reproduction unit as a search image that is to be supplied to the motion vector detection unit, wherein
the N pieces of coding units encode the coding target image in accordance with the coding parameters which are given to the respective coding units, and output the respective coded data.

3 more elements

An image coding apparatus that outputs plural codes for one coding target image, utilizing motion compensation inter-frame prediction, including:

a motion vector detection unit for dividing the coding target image into predetermined blocks and extracting a block in a search image, having a highest correlation with each of the predetermined blocks, thereby detecting a first motion vector for each of the predetermined blocks;
a first memory for storing the coding target image;
a coding unit for coding the first motion vector as well as performing motion compensation inter-frame prediction using an image in a position indicated by the first motion vector in the search image and the coding target image, in accordance with plural coding parameters which are supplied from outside to the one coding target image, thereby successively generating coded data corresponding to each of the plural coding parameters;
an image reproduction unit for reconstructing an image employing one of the coded data which are generated by the coding unit;
and
a second memory for storing the image reconstructed by the image reproduction unit as a search image that is supplied to the motion vector detection unit.

3 more elements

An image coding method for outputting plural codes for one coding target image, utilizing motion compensation inter-frame prediction, including:

a motion vector detection step of dividing the coding target image into predetermined blocks and extracting a block in a search image, having a highest correlation with each of the predetermined blocks, thereby detecting a first motion vector for each of the predetermined blocks;
a first coding step of coding the first motion vector as well as performing motion compensation inter-frame prediction using an image in a position indicated by the first motion vector in the search image and the coding target image, in accordance with a coding parameter that is given from outside, thereby to generate coded data;
an image reproduction step of reconstructing an image using the coded data that is generated in the first coding step;
a reproduced image storage step of storing the image reconstructed in the image reproduction step, as a search image to be employed in the motion vector detection step;
and
a second coding step of coding the first motion vector as well as performing motion compensation inter-frame prediction using the image in the position indicated by the first motion vector in the search image and the coding target image, in accordance with the coding parameter given from the outside, thereby to generate coded data,
said first coding step and said second coding step being carried out in parallel.

4 more elements

Dependencies are inferred from the claim text.

Image coding apparatus and image coding method

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Image coding apparatus and image coding method

Life of this patent

Abstract

Claims13