Ntt Docomo, Inc.

Ntt Mobile Communications Network, Inc.

Satoru Adachi

Sadaatsu Kato

Minoru Etoh

Choong Seng Boon

Thiow Keng Tan

Mitsuru Kobayashi

Hiroyuki Yamaguchi

Kazuo Sugimoto

Shunichi Sekiguchi

Tomoyuki Ohya

Toshio Miki

Takashi Suzuki

Toshiro Kawahara

Yasuhiro Ogiri

Chong Seng Boon

A moving picture encoding apparatus has a motion vector predicting part for performing, based on a temporal relation among adjacent reference frame images referred to for detecting motion vectors of adjacent blocks adjacent to a coding target block, a target reference frame image referred to for detecting a motion vector of the target block, and a target frame image being the frame image of the coding target, or based on time information thereof, a correction of scaling the motion vectors of the adjacent blocks on the basis of the target reference frame image; and a determination of an optimum predicted motion vector based on the motion vectors of the adjacent blocks; and thereby predicting the optimum predicted motion vector after the correction.

Moving picture encoding apparatus, moving picture decoding apparatus, moving picture encoding method, moving picture decoding method, moving picture encoding program, and moving picture decoding program

A video processing system provided with video encoding apparatusand video decoding apparatus. The encoding apparatusoutputs a maximum delay time that is incurred by backward prediction, in addition to encoded data Dresulting from encoding of video data D. The decoding apparatuseffects input of the maximum delay time that is incurred by backward prediction, in addition to encoded data Dfrom the encoding apparatus. Then the decoding apparatusdecodes the encoded data Dwith reference to the input maximum delay time to generate motion video data D

Video encoding method, video decoding method, video encoding apparatus, video decoding apparatus, video encoding program, and video decoding program

A video processing systemis provided with video encoding deviceand video decoding device. The video encoding deviceimplements backward interframe prediction from a temporally subsequent frame and outputs information indicating that an option to eliminate use of a decoded image of the temporally subsequent frame was chosen. The video decoding deviceeliminates use of the decoded image of the frame on the basis of this information, in conjunction with input of the information for eliminating use of the decoded image of the temporally subsequent frame.

An object of the present invention is to increase efficiency of information compression in coding and decoding. A moving picture encoding apparatusof the present invention has a motion vector predicting part for performing, based on a temporal relation among adjacent reference frame imagesreferred to for detecting motion vectors of adjacent blocks adjacent to a coding target block, a target reference frame imagereferred to for detecting a motion vector of the target block, and a target frame imagebeing the frame image of the coding target, or based on time information thereof, a correction of scaling the motion vectorsof the adjacent blocks on the basis of the target reference frame image; and a determination of an optimum predicted motion vector based on the motion vectors of the adjacent blocks; and thereby predicting the optimum predicted motion vector after the correction.

A video processing system is provided with video encoding apparatusand video decoding apparatus. The encoding apparatusoutputs a maximum delay time that is incurred by backward prediction, in addition to encoded data Dresulting from encoding of video data D. The decoding apparatuseffects input of the maximum delay time that is incurred by backward prediction, in addition to encoded data Dfrom the encoding apparatus. Then the decoding apparatusdecodes the encoded data Dwith reference to the input maximum delay time to generate motion video data D

A moving picture encoding apparatus for dividing a frame image as a coding target in a moving picture signal into plural target regions, detecting motion vectors for the respective target regions, and thereby performing coding based on motion compensation. The moving picture encoding apparatus comprises motion vector prediction means for performing a correction of scaling the motion vector of an adjacent region adjacent to the target region on the basis of the target reference frame image. The motion vector predicting means also performing a determination of an optimum predicted motion vector based on the motion vector of the adjacent region adjacent to the target region and thereby predicting the optimum predicted motion vector after the correction.

A moving picture encoding device for encoding a moving picture constituted of a time sequence of frame pictures by motion compensation, the device including: a reference picture generation section configured to generate a reference picture subjected to predetermined picture processing from a reference frame picture, in accordance with an encoding condition of a predetermined area to be encoded; and a motion compensation section configured to calculate a motion compensation value for the predetermined area to be encoded, by using a generated reference picture subjected to the predetermined picture processing.

Moving picture encoding device, moving picture decoding device, moving picture encoding method, moving picture decoding method, program, and computer readable recording medium storing program

Image encoding apparatusaccording to the present invention is an image encoding apparatusfor dividing image signals into blocks, performing an orthogonal transform of each block, reading resultant orthogonal transform coefficients to obtain a coefficient string, and performing entropy coding, which has block selectorfor selecting a size of a block for the orthogonal transform, out of a plurality of blocks of different sizes; coefficient string dividerfor, when a block of a size larger than a minimum size is selected by block selector, dividing a coefficient string in the block into a plurality of coefficient strings of a length equal to that of a coefficient string in a block of the minimum size; and encoderfor performing entropy coding adapted to the coefficient string in the block of the minimum size. This substantializes the image encoding apparatus capable of achieving efficient entropy coding in the orthogonal transform of variable sizes.

Image encoding method, image decoding method, image encoding apparatus, image decoding apparatus, image encoding program, and image decoding program

An object of the present invention is to express a predicted picture signal with light overheads, and to provide motion compensation of different pixel accuracy. A moving picture encoding deviceaccording to the present invention includes a motion vector detection meansfor detecting a motion vector of a predetermined area to be encoded in a frame picture, a prediction meansfor predicting the motion vector of the predetermined area to be encoded by using an encoded motion vector of a predetermined area in the frame picture, a determination meansfor determining whether or not the motion vector detected by the motion vector detection meansis a predetermined motion vector set in accordance with the motion vector predicted by the prediction means, and a switching meansfor switching a method of calculating a motion compensation value of the predetermined area to be encoded depending on whether or not the motion vector detected by the motion vector detection meansis the predetermined motion vector.

An image decoding method, apparatus and program for decoding coded picture data is disclosed. In the method, apparatus and program, the coded picture data is entropy-decoded to derive four transform coefficient strings each comprising entropy-decoded sixteen (16) transform coefficients. The four transform coefficient strings are combined into an 8&#xd7;8 block of entropy-decoded sixty four (64) transform coefficients by de-interleaving the four strings in such a manner as to select a lower frequency transform coefficient alternately from the four strings and arrange it in the 8&#xd7;8 block in an order of a low frequency to a high frequency. An inverse orthogonal transform is then performed on the 8&#xd7;8 block of the entropy-decoded sixty four (64) transform coefficients.

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Yokohama, Japan

Satoru Adachi