Panasonic Intellectual Property Corporation of America

Sun Patent Trust

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Tagivan Ii LLC

Velos Media, LLC

Matsushita Electric Industrial Co., Ltd.

Panasonic Holdings Corporation

Takahiro Nishi

Tadamasa Toma

Toshiyasu Sugio

Hisao Sasai

Youji Shibahara

Toru Matsunobu

Kyoko Tanikawa

Kiyofumi Abe

Chong Soon Lim

Kengo Terada

Hai Wei Sun

Ryuichi Kanoh

Han Boon Teo

Jing Ya Li

Viktor Wahadaniah

Ru Ling Liao

Sue Mon Thet Naing

Yusuke Kato

Sughosh Pavan Shashidhar

Virginie Drugeon

Masayuki Kozuka

Noritaka Iguchi

Chu Tong Wang

Che Wei Kuo

Takashi Hashimoto

Che-Wei Kuo

Masato Ohkawa

Hisaya Katou

Hideo Saitou

Hiroshi Yahata

Satoshi Yoshikawa

Daisaku Komiya

Tatsuya Koyama

Kyaw Kyaw Win

Xuan Jing

Shinya Kadono Kadono

Choong Seng Boon

Satoshi Kondo

Masayasu Iguchi

Taiji Sasaki

Hiroaki Toida

Pongsak Lasang

Luca Rigazio

Masayoshi Tojima

Alec Hodgkinson

Tomoki Ogawa

Toshiya Takahashi

Yuki Maruyama

David Michael Duffy

Christopher John Wright

Min Li

Jin Li

Bernadette Elliott Bowman

Wataru Ikeda

Tomokazu Ishikawa

Aki Yoneda

Chi Wang

Kazuya Takagi

Chung Dean Han

Keng Liang Loi

Shintarou Nakatani

Rohith Mars

Zheng Wu

Teo Han Boon

Haiwei Sun

Kyoto Tanikawa

Makoto Hagai

Tao Chen

Hiroshi Arakawa

Sheng Mei Shen

Yoshiichiro Kashiwagi

Hideyuki Ohgose

Kazuki Funase

Yoshinori Matsui

Satoshi Takahashi

Toshiroh Nishio

Koji Arimura

Akihiko Inoue

Naoshi Usuki

Hiroto Tomita

Steffen Wittmann

Toru Kawaguchi

Yuka Ozawa

Jun Takahashi

Hidekatsu Ozeki

Kyoko Uchibayashi

Yui Koashi

Takanori Ishida

Katsuki Urano

Vikto Wahadaniah

Youji Sibahara

Shinya Kadono

A video transmission method according to the present disclosure includes: generating a transmission signal including, in a time series, first video data having a first luminance dynamic range and second video data having a second luminance dynamic range wider than the first luminance dynamic range; and transmitting the transmission signal generated. In the generating of the transmission signal, a signal level corresponding to a luminance value is limited to a value lower than a limit value that is predetermined, in a transition period provided for switching from one of the first video data and the second video data to the other.

Video transmission method, video reception method, video transmission apparatus, and video reception apparatus

An image coding method includes: adding, to a candidate list, a first adjacent motion vector as a candidate for a predicted motion vector to be used for coding the current motion vector; selecting the predicted motion vector from the candidate list; and coding the current motion vector, wherein in the adding, the first adjacent motion vector indicating a position in a first reference picture included in a first reference picture list is added to the candidate list for the current motion vector indicating a position in a second reference picture included in a second reference picture list.

Image coding method, image decoding method, image coding apparatus, image decoding apparatus, and image coding and decoding apparatus

An encoder that encodes a current block to be encoded in an image is provided. The encoder includes: processor; and memory coupled to the processor, in which, in operation, the processor: generates a first prediction image based on a motion vector, the first prediction image being an image with full-pel precision; generates a second prediction image using an interpolation filter by interpolating a value at a fractional-pel position between full-pel positions included in the first prediction image; and encodes the current block based on the second prediction image, and in the using of the interpolation filter, the interpolation filter is switched between a first interpolation filter and a second interpolation filter differing in a total number of taps from the first interpolation filter.

Method of transmitting a bitstream including an encoded signal and syntax information to which a decoder performs a decoding method of decoding a current block based on a prediction image generated using an interpolation filter

A three-dimensional data encoding method includes: encoding, for each of second units, information about positions of three-dimensional points included in a first unit, to generate encoded data items, the second units being smaller than the first unit that is an encoding unit; and outputting the encoded data items. Each of the encoded data items includes no individual additional information. The encoded data items include common additional information. The common additional information includes first information indicating a size of a first encoded data item included in the encoded data items.

Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

A decoder includes circuitry and memory. Using the memory, the circuitry, in a first operating mode, derives first motion vectors for a first block obtained by splitting a picture, using a first inter prediction scheme, and generates a prediction image corresponding to the first block, by referring to spatial gradients of luminance generated based on the first motion vectors. Using the memory, the circuitry, in a second operating mode, derives second motion vectors for a sub-block obtained by splitting a second block, using a second inter prediction scheme different from the first inter prediction scheme, the second block being obtained by splitting the picture, and generates a prediction image corresponding to the sub-block without referring to spatial gradients of luminance.

Encoder, decoder, encoding method, and decoding method

An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry determines whether a determined relationship between a total number of one or more layer groups and a total number of one or more parameters is satisfied. The one or more layer groups each include at least one output layer, and the one or more parameters each indicate a performance requirement for a decoder. When the determined relationship is satisfied, the circuitry determines, using a determined method, a correspondence relationship for associating any of the one or more parameters with each of the one or more layer groups, and omits storing information indicating the correspondence relationship in a common header shared between layers in the one or more layer groups.

An encoding method for encoding three-dimensional points each having a position represented by a distance and an angle, the encoding method comprising: identifying three-dimensional points that belong to a second processing unit and have been encoded, for inter prediction of a first three-dimensional point belonging to a first processing unit; and selecting a reference three-dimensional point from the three-dimensional points identified to calculate an inter predicted value of the first three-dimensional point. The three-dimensional points identified include a second three-dimensional point and a third three-dimensional point, the second three-dimensional point having a second angle corresponding to a first angle of the first three-dimensional point, the third three-dimensional point having a third angle greater than the second angle.

Encoding method, decoding method, encoding device, and decoding device

A three-dimensional data encoding method includes: obtaining second attribute information obtained by transforming first attribute information of a three-dimensional point in at least one frame among frames, the frames constituting a sequence; and encoding the second attribute information to generate a bitstream. The transforming is different from quantization, and the bitstream further includes: at least one first parameter provided for the sequence for the transforming; and at least one second parameter provided for each of the at least one frame for the transforming.

An encoder partitions into blocks using a set of block partition modes. The set of block partition modes includes a first partition mode for partitioning a first block, and a second block partition mode for partitioning a second block which is one of blocks obtained after the first block is partitioned. When the number of partitions of the first block partition mode is three, the second block is a center block among the blocks obtained after partitioning the first block, and the partition direction of the second block partition mode is same as the partition direction of the first block partition mode, the second block partition mode indicates that the number of partitions is only three. A parameter for identifying the second block partition mode includes a first flag indicating a horizontal or vertical partition direction, and does not include a second flag indicating the number of partitions.

Encoder, decoder, encoding method, decoding method, and recording medium

An image coding method includes: determining a maximum number of merging candidates; deriving first merging candidates based on blocks spatially or temporally neighboring a current block; determining whether or not a total number of the first merging candidates is smaller than the maximum number; deriving, by making a combination out of the derived first merging candidates, a second merging candidate for bi-directional prediction when it is determined that the total number of the first merging candidates is smaller than the maximum number; selecting a merging candidate to be used for the coding of the current block from the first merging candidates and the second merging candidate; and coding, using the determined maximum number, an index for identifying the selected merging candidate, and attaching the coded index to the bitstream.

Image decoding method and image decoding apparatus using candidate motion vectors

For a location displaced by four samples in a vertical direction or a horizontal direction from a current location, the encoder performs a first determination of determining only whether the location displaced by four samples is a TU boundary, where the current location is a sample location of a current sub-block boundary on which the determination process is to be performed. In the first determination, when it is determined that the location displaced by four samples is a TU boundary, the encoder sets a maximum filter length to a first value, and in the case otherwise, the encoder performs a second determination of determining whether a location displaced by eight samples in the vertical direction or the horizontal direction from the current location is a TU boundary.

Various embodiments provide an encoder that generates a plurality of quantization matrix elements for a current block; generates a quantization matrix using the plurality of quantization matrix elements; and quantizes, using the quantization matrix, transform coefficients of the current block. The quantization matrix includes only a subset of quantization matrix elements of the plurality of quantization matrix elements. Each of the subset of quantization matrix elements has an x-coordinate value less than a threshold x-coordinate value, a y-coordinate value less than a threshold y-coordinate value, or an x-coordinate value less than the threshold x-coordinate value and a y-coordinate value less than the threshold y-coordinate value.

Encoder, decoder, and related non-transitory computer readable medium

An encoder includes memory and circuitry which: (i) encodes an image block; (ii) when encoding the image block: binarizes coefficient information indicating coefficients of the image block; and controls whether to apply arithmetic encoding to a binary data string obtained by binarizing the coefficient information; and (iii) when binarizing the coefficient information: binarizes the coefficient information according to a first syntax structure when arithmetic encoding is applied to the data string and a predetermined condition is not satisfied; binarizes the coefficient information according to a second syntax structure when arithmetic encoding is applied to the data string and the predetermined condition is satisfied; binarizes the coefficient information according to the second syntax structure when no arithmetic encoding is applied to the data string; and subtracts 1 from a value of an initial non-zero coefficient when no arithmetic encoding is applied to the data string when encoding the image block.

An encoder includes: circuitry; and memory coupled to the circuitry. In operation, the circuitry: controls whether to change a resolution of a picture from a resolution of a previous picture preceding the picture in one of display order and encoding order, according to a constraint that allows the changing only when the picture is a random access picture among one or more random access pictures; and when a resolution of a reference picture to be used in encoding of an inter-predicted picture is different from a resolution of the inter-predicted picture, resamples a reference image in the reference picture according to a difference between the resolution of the reference picture and the resolution of the inter-predicted picture, and encodes an image in the inter-predicted picture using the reference image resampled.

An image encoder is provided including circuitry and a memory coupled to the circuitry. The circuitry, in operation, responds to a size of a block satisfying a size condition by generating a prediction image using a prediction mode selected from a plurality of prediction modes. The plurality of prediction modes include a first prediction mode in which a prediction process uses a motion vector and a reference block in a same picture as the block. The circuitry encodes the block using the prediction image.

Image encoder, image decoder, image encoding method, and image decoding method

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Nara, Japan

Takahiro Nishi