Panasonic Intellectual Property Corporation of America

Panasonic Intellectual Property Management Co., Ltd.

Sun Patent Trust

Panasonic Corporation

Intellectual Property Corporation of America

Virginie Drugeon

Takahiro Nishi

Tadamasa Toma

Kiyofumi Abe

Yusuke Kato

Hisao Sasai

Youji Shibahara

Ryuichi Kanoh

Thomas Wedi

Matthias Narroschke

Kyoko Tanikawa

Toshiyasu Sugio

Steffen Wittmann

Torsten Palfner

Hisao c/o Panasonic Corporation Sasai

Toshiyasu c/o Panasonic Corporation Sugio

Youji c/o Panasonic Corporation Shibahara

Takahiro c/o Panasonic Corporation Nishi

An encoder includes memory and circuitry coupled to the memory. The circuitry stores a total number of temporal sub-layers in a bitstream Into either a picture timing supplemental enhancement information (SEI) message or a buffering period SEI message, and encodes the total number of the temporal sub-layers.

Encoder, decoder, encoding method, and decoding method

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

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 encoder includes circuitry and memory coupled to the circuitry. In operation, in the case where a video parameter set is used for encoding a video, the circuitry writes a first parameter into the video parameter set. The first parameter indicates the maximum number of one or more temporal sublayers in a layer set unit. The circuitry writes a second parameter into a sequence parameter set. The second parameter indicates the maximum number of one or more temporal sublayers in a sequence unit. In the case where the video parameter set is used for encoding the video, the second parameter is limited to less than or equal to the first parameter. In the case where the video parameter set is not used for encoding the video, the second parameter is limited to less than or equal to a fixed value.

A data generation method is for generating video data that covers a second luminance dynamic range wider than a first luminance dynamic range and has reproduction compatibility with a first device that does not support reproduction of video having the second luminance dynamic range and supports reproduction of video having the first luminance dynamic range, and includes: generating a video signal to be included in the video data using a second OETF; storing, into VUI in the video data, first transfer function information for identifying a first OETF to be referred to by the first device when the first device decodes the video data; and storing, into SEI in the video data, second transfer function information for identifying a second OETF to be referred to by a second device supporting reproduction of video having the second luminance dynamic range when the second device decodes the video data.

Data generation method, data reproduction method, data generation device and data reproduction device

An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry: writes, into a sequence parameter set which is header information of a sequence, video usability information syntax which is information for realizing an additional function in display of an image, and syntax different from the video usability information syntax. The syntax includes at least one parameter related to display timing of the image.

An encoder includes memory and circuitry coupled to the memory. The circuitry, for each of temporal sub-layers for temporal scalability different from spatial scalability, stores first parameters into buffering period supplemental enhancement information (SEI) and encodes the first parameters. The first parameters present initial delays in timing to extract data from a coded picture buffer (CPB). The circuitry stores a second parameter into the buffering period SEI and encodes the second parameter. The second parameter indicates a total number of the temporal sub-layers. A value of the second parameter is equal to a value of a third parameter that is encoded into a sequence parameter set and indicates a total number of the temporal sub-layers.

A decoding method includes: decoding, from a bitstream, cropping information indicating an amount of cropping corresponding to an amount of padding of a first subpicture that is a subpicture (i) which is among a plurality of subpictures constituting a picture, (ii) in which at least one end of the subpicture is included in at least one end of the picture, (iii) to which at least one subpicture is adjacent on a side opposite to the at least one end of the subpicture, and (iv) which is padded so that a size of the subpicture reaches an integer multiple of a preconfigured coding unit size in at least one direction; decoding the first subpicture from the bitstream; and cropping the first subpicture according to the amount of cropping.

Decoding method, encoding method, decoder, and encoder

A data generation method is for generating video data that covers a second luminance dynamic range wider than a first luminance dynamic range and has reproduction compatibility with a first device that does not support reproduction of video having the second luminance dynamic range and supports reproduction of video having the first luminance dynamic range, and includes: generating a video signal to be included in the video data using a second OETF; storing, into VUI in the video data, first transfer function information for identifying a first OETF to be referred 10 to by the first device when the first device decodes the video data; and storing, into SEI in the video data, second transfer function information for identifying a second OETF to be referred to by a second device supporting reproduction of video having the second luminance dynamic range when the second device decodes the video data.

An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry encodes, per temporal sub-layer, one or more hypothetical reference decoder (HRD) parameters into an HRD-related supplemental enhancement information (SEI) message, the one or more HRD parameters being one or more parameters for an HRD, the one or more parameters being related to a decoding unit, the HRD-related SEI message being an SEI message related to the HRD.

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Darmstadt, Germany

Virginie Drugeon