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

Intellectual Property Corporation of America

Velos Media International Limited

Takahiro Nishi

Tadamasa Toma

Toshiyasu Sugio

Hisao Sasai

Youji Shibahara

Toru Matsunobu

Kiyofumi Abe

Kyoko Tanikawa

Chong Soon Lim

Kengo Terada

Hai Wei Sun

Ryuichi Kanoh

Han Boon Teo

Jing Ya Li

Viktor Wahadaniah

Ru Ling Liao

Yusuke Kato

Sue Mon Thet Naing

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

Xuan Jing

Kyaw Kyaw Win

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

Haiwei Sun

Teo Han Boon

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

Yuka Ozawa

Toru Kawaguchi

Jun Takahashi

Hidekatsu Ozeki

Kyoko Uchibayashi

Yui Koashi

Katsuki Urano

Takanori Ishida

Youji Sibahara

Vikto Wahadaniah

Sue Mon Naing

Victor Wahadaniah

An encoder including circuitry and memory coupled to the circuitry. In a second type of residual coding among a first type of residual coding where an orthogonal transform is applied to a current block and the second type of residual coding where the orthogonal transform is skipped for the current block, wherein a first syntax used for the first type of residual coding is different from a second syntax used for the second type of residual coding, the circuitry: in a first loop process, derives a context index by using at least one of a plurality of surrounding coefficients; and encodes a plurality of coefficient information flags by CABAC with the derived context index; and in a second loop process of the plurality of loop processes, encodes a plurality of absolute value flags by CABAC with another context index.

Encoder for encoding a plurality of coefficient information flags and encoding a plurality of absolute value flags

An encoder includes circuitry, and memory coupled to the circuitry. The circuitry, in operation, for each of a plurality of sub-bitstreams having mutually different frame rates, encodes identification information into a header of a bitstream including the plurality of sub-bitstreams, the identification information indicating a temporal ID that is an identifier of a temporal layer related to a temporal scalability and corresponds to the sub-bitstream, and encodes level information indicating a conformance level of the sub-bitstream.

Encoder for encoding information of sub-bitstreams having mutually different frame rates

An encoder that switches whether or not to store a first parameter included in hypothetical reference decoder (HRD) parameters related to a decoding unit into a buffering period supplemental enhancement information (SEI) message according to a second flag stored into the buffering period SEI message. The second flag indicates whether or not the HRD parameters related to the decoding unit are present, and a value of the second flag being equal to a value of a first flag stored in a sequence parameter set. The first flag indicates whether or not the HRD parameters are present.

Encoder that switches whether or not to store a first parameter into a buffering period supplemental enhancement information message according to a flag

Provided is an encoder including: circuitry; and memory coupled to the circuitry, in which the circuitry: derives a prediction residual indicating a difference between a current block and a prediction image of the current block; performs primary transform on the prediction residual, and performs secondary transform on a result of the primary transform; performs quantization on a result of the secondary transform; and encodes a result of the quantization. In the performing of the secondary transform, when a matrix weighted intra prediction included in intra prediction and having prediction modes is used, the circuitry uses, as a transform set for the secondary transform, a common transform set shared among the prediction modes. The matrix weighted intra prediction generates the prediction image by performing matrix calculation on a pixel sequence obtained from pixel values of surrounding pixels of the current block.

Encoder, decoder, encoding method, and decoding method

An encoder includes memory and circuitry. The circuitry: derives a first motion vector in a unit of a prediction block using a first inter frame prediction mode that uses a degree of matching between two reconstructed images of two regions in two difference pictures, the prediction block being obtained by splitting an image included in a video; and performs, in the unit of the prediction block, a first motion compensation process that generates a prediction image by referring to a spatial gradient of luminance in an image generated by performing motion compensation using the first motion vector derived.

An encoder includes circuitry and memory. The circuitry, in operation, generates a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to a first reconstructed image sample of a luma component. The circuitry generates a second coefficient value by applying an ALF (adaptive loop filtering) process to a second reconstructed image sample of a chroma component. The circuitry generates a third coefficient value by adding the first coefficient value to the second coefficient value, and encodes a third reconstructed image sample of the chroma component using the third coefficient value. In the CCALF process, in response to a coordinate of the second reconstructed image sample being (x, y), coordinates of the first reconstructed image samples are (2x, 2y−1), (2x−1, 2y), (2x, 2y), (2x+1, 2y), (2x−1, 2y+1), (2x, 2y+1), (2x+1, 2y+1), and (2x, 2y+2).

System and method for video coding

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.

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

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Nara, Japan

Takahiro Nishi