Sharp Kabushiki Kaisha Corporation

Huawei Technologies Co., Limited

Dolby International Ab

Velos Media, LLC

Tomoyuki Yamamoto

Tomohiro Ikai

Yukinobu Yasugi

Takeshi Tsukuba

Takanori Yamazaki

Sachin G Deshpande

Tomoko Aono

Yasuaki Tokumo

Maki Takahashi

Norio Itoh

A reference picture information decoding unit () omits decoding of a reference list sorting presence or absence flag and/or a reference list sorting order based on the number of current picture referable pictures.

Image decoding device and image coding device

An adaptive offset filter () adds an offset to the pixel value of each pixel forming an input image. The adaptive offset filter () refers to offset-type specifying information, sets offset attributes for a subject unit area of the input image, decodes an offset having a bit width corresponding to an offset value range included in the set offset attributes, and adds the offset to the pixel value of each pixel forming the input image.

Offset decoding device, offset coding device, image filtering device

To improve a coding efficiency. There are included a PU level search unit configured to search for a motion vector for each prediction block by using a matching process. and a sub-block level search unit configured to search for a motion vector of each of sub-blocks in the prediction block, wherein a precision of a local search by the PU level search unit is lower than a precision of a local search by the sub-block level search unit.

Motion vector generation device, a video decoding device and a video coding device

To achieve a reduction in the amount of coding taken in the use of an asymmetric partition and to implement efficient encoding/decoding processes exploiting the characteristics of the asymmetric partition. In a case that a CU information decoding unit decodes information for specifying an asymmetric partition (AMP; Asymmetric Motion Partition) as a partition type, an arithmetic decoding unit is configured to decode binary values by switching between arithmetic decoding that uses contexts and arithmetic decoding that does not use contexts in accordance with the position of the binary values.

Video decoding device

Memory required during decoding is reduced. A video image decoding device () is equipped with main direction deriving means (A) that references a prediction mode definition DEFPM(), and from a prediction mode number, derives a main direction of a prediction direction corresponding to a prediction mode, and a gradient deriver (B) that references a gradient definition table DEFANG(), and derives a gradient of the prediction direction.

Image decoding device, image encoding device, and image decoding method

To achieve a reduction in the amount of coding taken in the use of an asymmetric partition and to implement efficient encoding/decoding processes exploiting the characteristics of the asymmetric partition. An image decoding device includes a motion compensation parameter derivation unit configured to derive a motion compensation parameter indicating either a uni-prediction scheme or a bi-prediction scheme. In a case that a prediction unit has a size less than or equal to a predetermined value, the motion compensation parameter derivation unit is configured to derive the motion compensation parameter by switching between the prediction schemes.

Image decoding device and image decoding method

In a conventional art, an output layer set having no output layer is sometimes defined. Consequently, even if the decoder decodes a bit stream to obtain each layer in the output layer set without the output layer, there is no picture to be outputted. There is a possibility that such coded data causes the decoder expecting an output to operate unexpectedly. Output layer sets having the same configuration may be defined. Consequently, the amount of code pertaining to the output layer sets defined in an overlapping manner is redundant. According to an aspect of the present disclosure, a specification of a bit stream conformance pertaining to the output layer set prevents occurrence of an output layer set without an output layer and a redundant output layer set.

Image decoding apparatus

At least one of a vector candidate derivation unit and a merge candidate derivation unit derives a motion vector of each of multiple sub-blocks contained in a decoding target block by referring to motion vectors at multiple control points including two points at an interval which is longer than one side of the target block, and a prediction image generation unit refers to the motion vector of each sub-block to generate a prediction image.

Image decoding device, image encoding device, and method for decoding coded image

Motion vector generation device, a prediction image generation device, a video decoding device and a video coding device

Prediction image generation device

To apply a filter to input image data in accordance with an image characteristic. A CNN filter includes a neural network configured to receive an input of one or multiple first type input image data and one or multiple second type input image data, and output one or multiple first type output image data, the one or multiple first type input image data each having a pixel value of a luminance or chrominance, the one or multiple second type input image data each having a pixel value of a value corresponding to a reference parameter for generating a prediction image and a differential image, the one or multiple first type output image data each having a pixel value of a luminance or chrominance.

Growing community of inventors

Osaka, Japan

Tomoyuki Yamamoto