# US 11,908,492 B2 · Playback device, playback method, and recording medium

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- Number: US 11,908,492 B2
- Document ID: US11908492B2
- Status: Granted
- Kind: B2
- Application number: 17/556,241
- Filed: 2021-12-20
- Published: 2022-04-14
- Granted: 2024-02-20
- Earliest claimed: 2014-08-07
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Panasonic Intellectual Property Corporation of America
- Inventors: Hiroshi Yahata; Tadamasa Toma; Tomoki Ogawa
- Web page: https://patentgrep.com/patent/US11908492B2

## CPC

- G11B 27/28: by using information signals recorded by the same method as the main recording {(G11B27/22 takes precedence)}
- G11B 20/10: Digital recording or reproducing
- G11B 20/10527: {Audio or video recording; Data buffering arrangements (G11B20/12 - G11B20/18 take precedence)}
- G11B 27/105: {of operating discs}
- G11B 27/329: {on a disc [VTOC]}
- H04N 5/84: using optical recording (H04N5/80, H04N5/89, H04N5/91 take precedence)
- H04N 5/85: on discs or drums
- H04N 7/015: High-definition television systems
- H04N 9/8042: {involving data reduction}
- H04N 9/8205: {involving the multiplexing of an additional signal and the colour video signal}
- H04N 9/8233: {the additional signal being a character code signal}
- G11B 2220/2541: Blu-ray discs; Blue laser DVR discs
- G11B 2220/2562: DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
- H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence)
- H04N 19/98: Adaptive-dynamic-range coding [ADRC]
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A decoding method of a video stream, which is encoded video information. The video stream includes a base video stream, and an enhanced video stream, which is a video stream to enhance luminance of the base video stream, and a describer that contains the combination information of the base video stream and the enhanced video stream. The decoding method includes acquiring the describer, and identifying the combination of the base video steam and the enhanced video stream. The decoding method also includes generating base video information by decoding the base video stream, generating enhanced video information by decoding the enhanced video stream, generating decoded video information based on the base video stream and the enhanced video stream, and outputting the decoded video information.

## Claims

### Claim 1

A decoding method of a video stream, which is encoded video information,
included in the video stream are
a base video stream having a second dynamic range of luminance that is wider than a first dynamic range, and an enhanced video stream being a video stream to enhance luminance of the base video stream, and
a describer that specifies a pair of the base video stream and the enhanced video stream,
the method comprising:
acquiring the describer, and identifying the pair of the base video steam and the enhanced video stream;
generating base video information by decoding the base video stream;
generating enhanced video information by decoding the enhanced video stream;
generating decoded video information based on the base video stream and the enhanced video stream; and
outputting the decoded video information.

### Claim 2

A decoding system that decodes a video stream, which is encoded video information,
included in the video stream are
a base video stream having a second dynamic range of luminance that is wider than a first dynamic range, and an enhanced video stream being a video stream to enhance luminance of the base video stream, and
a describer that specifies a pair of the base video stream and the enhanced video stream,
the system comprising:
a decoder that acquires the describer, and identifies the pair of the base video steam and the enhanced video stream, generates base video information by decoding the base video stream, generates enhanced video information by decoding the enhanced video stream, generates decoded video information based on the base video stream and the enhanced video stream, and
an outputter that outputs the decoded video information.