Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Kazuhiko Kouno

Masayuki Kozuka

Yoshihiro Mori

Yoshiichiro Kashiwagi

Hiroshi Yahata

Masaya Yamamoto

Toshiroh Nishio

Takeshi Hirota

Yasushi Uesaka

Toshiyuki Fukushima

Hideki Fukuda

Shigeo Sakaue

Atsushi Ito

Toshiya Noritake

Hiroki Inagaki

Makoto Kawaharada

Kiyoaki Watanabe

An image processing device includes an acquisition section configured to acquire still image data obtained by imaging, a generator configured to generate, from the still image data acquired by the acquisition section, a logically single data unit including first still image data and second still image data different from each other in luminance dynamic range and reproducible independently from each other, and an output section configured to output the data unit generated by the generator.

Image processing device, reproduction device, image processing method, and reproduction method

A video display apparatus includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-dependent change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-dependent change in the maximum luminance of the video.

Video display apparatus and video display method

A video display system includes: a tone mapping processor; a display; and a metadata processor that generates first dynamic metadata that indicates a maximum luminance that is constant over a plurality of time intervals by using static metadata. The video display system switches between: a first operation of (i) generating the first dynamic metadata by using the static metadata, performed by the metadata processor and (ii) performing the tone mapping process by using the first dynamic metadata, performed by the tone mapping processor; and a second operation of performing the tone mapping process by using second dynamic metadata in which the maximum luminance varies over the plurality of time intervals, performed by the tone mapping processor.

Video display system and video display method

A video processing system includes: an acquirer that acquires video data including a main video; a format acquirer that acquires a display format that indicates a luminance dynamic range format displayable by a video display apparatus; a generator that generates first characteristics information that indicates first dynamic luminance characteristics that correspond to the display format by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from the display format, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video; and a video transmitter that outputs the first characteristics information generated by the generator.

Video processing system and video processing method

A video display system includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-depend change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-depend change in the maximum luminance of the video. When the tone mapping process used is switched from the second tone mapping process to the first tone mapping process, the conversion characteristics used is changed gradually or stepwise from the constant conversion characteristics to dynamically changing conversion characteristics over a plurality of frames.

A video display system includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-dependent change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-dependent change in the maximum luminance of the video.

A video display apparatus includes: a tone mapping processor that converts, by using dynamic metadata indicating a maximum luminance of a video in each of a plurality of time intervals included in a predetermined period, a luminance of the video in each time interval based on conversion characteristics according to the maximum luminance of the video in the time interval; and a display. The tone mapping processor switches between: a first operation of performing the tone mapping process by using first dynamic metadata that indicates the maximum luminance that is constant over the plurality of time intervals, the first dynamic metadata being generated by using static metadata that indicates a maximum luminance of the video in the predetermined period; and a second operation of performing the tone mapping process by using second dynamic metadata in which the maximum luminance varies over the plurality of time intervals.

A video display apparatus includes: a video receiver that acquires video data including a main video; a generator that generates first characteristics information that indicates first dynamic luminance characteristics by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from a display format that indicates a luminance dynamic range format displayable by the video display apparatus, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video and correspond to the display format; a tone mapping processor that performs a tone mapping process of converting a luminance of the main video based on conversion characteristics according to the first dynamic luminance characteristics indicated by the first characteristics information generated by the generator; and a display that displays the main video that has undergone the tone mapping process.

Video display apparatus and video display method for luminance conversion

A video display apparatus includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-depend change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-depend change in the maximum luminance of the video. When the tone mapping process used is switched from the second tone mapping process to the first tone mapping process, the conversion characteristics used is changed gradually or stepwise from the constant conversion characteristics to dynamically changing conversion characteristics over a plurality of frames.

A reproducing method includes: an obtaining step of obtaining a high quality image and a first low quality image that are still images showing an identical scene, and conversion determination information; a first determining step of determining whether or not the display device can display the high quality image; a first reproducing step of reproducing the high quality image when the display device can display the high quality image; a second determining step of determining whether or not to generate a second low quality image by using the conversion determination information when the display device cannot display the high quality image; a second reproducing step of reproducing the first low quality image when it is determined not to generate the second low quality image; and a third reproducing step of generating the second low quality image from the high quality image and reproducing the second low quality image when it is determined to generate the second low quality image.

Reproduction method, creation method, reproduction device, creation device, and recording medium

To encode a moving picture in real time in as high quality as possible, no matter whether a target bit rate for encoding the moving picture is high or low. An encoder performs motion compensated inter-picture predictive coding on moving picture data in a selected one of prediction modes. The encoder includes: a detecting section for detecting an accumulated error and a motion vector of a block, included in a picture to be encoded, by reference to a block in a reference picture to be used for each prediction mode; an estimating section for calculating an estimated value by adding a product of each accumulated error and a predetermined first coefficient and that of a predicted vector associated with each motion vector and a second coefficient; a determining section for selecting one of the prediction modes according to the estimated value; a coefficient updating section for updating a proportionality factor using at least a quantization scale used when the block to be encoded is quantized; and an encoding section for encoding the data of the block to be encoded in the prediction mode selected.

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Osaka, Japan

Kazuhiko Kouno