Panasonic Corporation

Panasonic Intellectual Property Corporation of America

Sun Patent Trust

Steffen Wittmann

Thomas Wedi

Matthias Narroschke

Satoshi Kondo

Virginie Drugeon

Tadamasa Toma

Hiroshi Saito

Hisao Sasai

Takahiro Nishi

Youji Shibahara

Kyoko Tanikawa

Martin Schlockermann

A signal separation unit () separates an input picture made up of component pictures of RGB, each of which has an equal number of pixels as the input picture, into three component pictures, and outputs the three component pictures. Each of coding units (to) codes one of the component pictures into an intra-picture prediction coded picture or an inter-picture prediction coded picture, and outputs a bit stream corresponding to the component picture. A bit stream multiplexing unit () multiplexes three bit streams outputted from the three coding units into one bit stream, and outputs the bit stream. Each of the coding units (), () and () determines a prediction method for the component picture at the time of coding.

Moving picture coding apparatus, moving picture decoding apparatus, and stream data

The present invention relates to intra prediction which may be performed during encoding and/or decoding of an image signal. In particular, the present invention relates to intra prediction of a current block, during which filtering is applied to the prediction signal and/or to signal used for the prediction. The filtering is applied in accordance with a decision based on characteristics of image signal included in block(s) spatially adjacent to the current block.

Filtering mode for intra prediction inferred from statistics of surrounding blocks

A video coding method enables reduction in the decrease in the efficiency of coding a video and enhancement of the image quality of the resulting decoded video. The video coding method includes predicting a video signal to generate a prediction signal; calculating, as a prediction error signal, the difference between the video signal and a prediction signal; and generating a reconstructed video signal by reconstructing the video signal based on the prediction signal and the prediction error signal. The video coding method also includes determining filter data items that are used to filter each of at least two of the prediction signal, the prediction error signal, and the reconstructed video signal; and coding the determined filter data items based on the cross correlations between the determined filter data items.

Video coding method, video decoding method, video coding apparatus, and video decoding apparatus that use filters for filtering signals

A motion compensation method includes: specifying, using a motion vector of a current block, a reference image area for use in motion compensation for each of the current block and a current sub-block spatially adjacent to the current block, to read out reference pixel data of the specified area from a frame memory; performing motion compensation using the reference pixel data read out in the readout, to generate prediction pixel data for each of the current block and the current sub-block; outputting the prediction pixel data for the current block, generated in the performing of motion compensation; and temporarily storing the prediction pixel data for the current sub-block, generated in the performing of motion compensation.

Motion compensation method, image decoding method, image coding method, motion compensation apparatus, program, and integrated circuit

The image coding method for improving the filtering quality and suppressing increase in the transmission bandwidth includes: selecting filter data elements of the first and second component filters from a filter memory (), and obtaining indexes stored in association with the selected filter data elements in the filter memory () (S, S); coding a macroblock using the two filter data elements (S); adding the two indexes to a coded video signal (S); calculating the filter data elements of the first and second component filters based on a slice, and assigning indexes to the filter data elements (S, S); storing, in the filter memory (), a corresponding one of the calculated filter data elements and the index in association with each other for each of the component filters (S); and adding the two calculated filter data elements to the coded video signal (S).

Image coding method, image decoding method, and apparatuses therefor

Provide is an image decoding apparatus which reliably prevents deterioration of the image quality of decoded images which have been previously coded. An image decoding apparatus () includes: an inverse quantization and inverse orthogonal transform unit () and an adder () which decode a coded image included in a coded stream (Str) to generate a decoded image (Rc); an entropy decoding unit () which extracts cross-correlation data (p) which indicates a cross-correlation between the decoded image (Rc) and an image which corresponds to the decoded image and has not yet been coded; and an adaptive filter () which computes a filter parameter (w) based on the extracted cross-correlation data (p), and performs a filtering operation on the decoded image (Rc) according to the filter parameter (w).

Image coding apparatus and image decoding apparatus

A decoder according to the present invention includes: an obtainment unit which obtains additional information that includes a motion vector indicating a motion of an image in the first video data, and stream data that is coded data of the second video data which has the same content as the first video data and which has the lower resolution than the resolution of the first video data; a decoding unit which decodes the stream data into images of the second video data; and a conversion unit which converts the decoded images of the second video data into third video data having the same resolution as the first video data, through interpolation using the additional information.

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Morfelden-Walldorf, Germany

Steffen Wittmann