# US 10,482,923 B2 · Recording medium, playback device, and playback method

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- Number: US 10,482,923 B2
- Document ID: US10482923B2
- Status: Granted
- Kind: B2
- Application number: 15/683,053
- Filed: 2017-08-22
- Published: 2017-12-07
- Granted: 2019-11-19
- Earliest claimed: 2014-09-12
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Panasonic Intellectual Property Corporation of America
- Inventors: Hiroshi Yahata; Tadamasa Toma
- Web page: https://patentgrep.com/patent/US10482923B2

## 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 27/105: {of operating discs}
- G11B 27/329: {on a disc [VTOC]}
- 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}
- G11B 2220/2541: Blu-ray discs; Blue laser DVR discs
- G11B 2220/2562: DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
- 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

At least one video stream that is encoded video information, and a management information file indicating attributes relating to the entire recording medium, are recorded in a recording medium. The management information file includes attribute information indicating whether the dynamic range of luminance of an initial video stream, which is played first out of the at least one video stream when the recording medium is inserted into a playback device, is a first dynamic range, or a second dynamic range that is broader than the first dynamic range.

## Claims

### Claim 1

A non-transitory computer-readable medium, in which are recorded
a base video stream that is encoded video information,
an enhanced video stream that is encoded video information, for enhancing luminance of the base video stream by being played synchronously with the base video stream, and
a management information file in which is described a playback path of the base video stream,
wherein a playback path of the enhanced video stream is further described in the management information file so that the enhanced video stream is played synchronously with the base video stream,
wherein the base video stream includes High Dynamic Range (HDR), and
wherein the enhanced video stream, by being played synchronously with the base video stream, realizes a higher luminance than the base video stream.

### Claim 2 (depends on 1)

The non-transitory computer-readable medium according to claim 1,
wherein the base video stream and the enhanced video stream are multiplexed in the same transport stream.

### Claim 3 (depends on 1)

The non-transitory computer-readable medium according to claim 1,
wherein a first section included in the playback path of the base video stream, and a second section included in the playback path of the enhanced video stream, are described in the management information file in a mutually correlated manner,
and wherein playback time of the first section and the second section is the same.

### Claim 4 (depends on 3)

The non-transitory computer-readable medium according to claim 3,
wherein a playback start time of the first section, and a playback start time of the second section, that are the same time as each other, are described in the management information file.

### Claim 5 (depends on 4)

The non-transitory computer-readable medium according to claim 4,
wherein a playback end time of the first section, and a playback end time of the second section, that are the same time as each other, are described in the management information file.

### Claim 6 (depends on 3)

The non-transitory computer-readable medium according to claim 3,
wherein a playback end time of the first section, and a playback end time of the second section, that are the same time as each other, are described in the management information file.

### Claim 7 (depends on 1)

The non-transitory computer-readable medium according to claim 1,
wherein the base video stream is independently playable as an HDR video stream.