# US 10,770,115 B2 · Recording medium, playback method, and playback device

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- Number: US 10,770,115 B2
- Document ID: US10770115B2
- Status: Granted
- Kind: B2
- Application number: 16/714,132
- Filed: 2019-12-13
- Published: 2020-04-16
- Granted: 2020-09-08
- Earliest claimed: 2014-11-17
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Panasonic Intellectual Property Corporation of America
- Inventors: Hiroshi Yahata; Kazuhiro Mochinaga
- Web page: https://patentgrep.com/patent/US10770115B2

## CPC

- G11B 27/102: {Programmed access in sequence to addressed parts of tracks of operating record carriers (access by moving the head G11B3/08, G11B5/54, G11B7/085, G11B21/022; by moving the record carrier G11B15/005, G11B17/005, by driving of both record carrier and head G11B15/1816)}
- G11B 20/10: Digital recording or reproducing
- G11B 27/105: {of operating discs}
- G11B 27/32: on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B 27/329: {on a disc [VTOC]}
- H04N 5/85: on discs or drums
- H04N 9/8045: {using predictive coding}
- H04N 9/8211: {the additional signal being a sound signal (H04N9/835 takes precedence)}
- H04N 9/8233: {the additional signal being a character code signal}
- H04N 9/8715: {involving the mixing of the reproduced video signal with a non-recorded signal, e.g. a text signal}
- 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 playback method of reading out and playing streams from a recording medium is provided. A stream file. including a first luminance video and a second luminance video, a playlist file, first and second combination information, elementary streams that can be played together with the first luminance video, and elementary streams that can be played together with the second luminance video are recorded in the recording medium. The playback method includes, when playing the first luminance video, reading out any one of the elementary streams listed in the first combination information of the playlist file, and playing at the same time with the first luminance video, and when playing the second luminance video, reading out any one of the elementary streams listed in the second combination information of the playlist file, and playing at the same time with the second luminance video.

## Claims

### Claim 1

A playback method of reading out and playing streams from a recording medium, in which are recorded
a stream file including a first luminance video expressed by luminance of a first dynamic range, and a second luminance video expressed by luminance of a second dynamic range that is broader than the first dynamic range, and
a playlist file for controlling playback of the stream file,
first and second combination information, representing combinations of elementary streams that each can be played at the same time in a same playback section, being described in the playlist file,
elementary streams that can be played at the same time with the first luminance video in this playback section being all listed in the first combination information, and
elementary streams that can be played at the same time with the second luminance video in this playback section being all listed in the second combination information,
wherein all of the elementary streams that can be played at the same time with the first luminance video listed in the first combination information and all of the elementary streams that can be played at the same time with the second luminance video listed in the second combination information are included in the stream files including the first luminance video and the second luminance video,
the playback method comprising:
in a case of playing the first luminance video, reading out any one of the elementary streams listed in the first combination information of the playlist file, and playing at the same time with the first luminance video; and
in a case of playing the second luminance video, reading out any one of the elementary streams listed in the second combination information of the playlist file, and playing at the same time with the second luminance video.

### Claim 2

A playback device that reads out and plays streams from a recording medium, in which are recorded
a stream file including a first luminance video expressed by luminance of a first dynamic range, and a second luminance video expressed by luminance of a second dynamic range that is broader than the first dynamic range, and
a playlist file for controlling playback of the stream file,
first and second combination information, representing combinations of elementary streams that each can be played at the same time in a same playback section, being described in the playlist file,
elementary streams that can be played at the same time with the first luminance video in this playback section being all listed in the first combination information, and
elementary streams that can be played at the same time with the second luminance video in this playback section being all listed in the second combination information,
wherein all of the elementary streams that can be played at the same time with the first luminance video listed in the first combination information, and all of the elementary streams that can be played at the same time with the second luminance video listed in the second combination information are included in the stream files including the first luminance video and the second luminance video,
the playback device comprising:
a management information processing unit that
in a case of playing the first luminance video, reads out any one of the elementary streams listed in the first combination information of the playlist file, and plays at the same time with the first luminance video; and
in a case of playing the second luminance video, reads out any one of the elementary streams listed in the second combination information of the playlist file, and plays at the same time with the second luminance video.