# US 2010/0165083 A1 · Recording medium, playback device, and integrated circuit

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- Number: US 2010/0165083 A1
- Document ID: US20100165083A1
- Status: Published application
- Kind: A1
- Application number: 12/648,519
- Filed: 2009-12-29
- Published: 2010-07-01
- Earliest claimed: 2008-12-29
- Inventors: Taiji Sasaki; Hiroshi Yahata
- Web page: https://patentgrep.com/patent/US20100165083A1

## CPC

- H04N 5/85: on discs or drums
- G11B 20/10527: {Audio or video recording; Data buffering arrangements (G11B20/12 - G11B20/18 take precedence)}
- G11B 20/1217: {on discs}
- G11B 27/105: {of operating discs}
- H04N 9/8205: {involving the multiplexing of an additional signal and the colour video signal}
- H04N 21/42646: {for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM}
- H04N 21/4325: {by playing back content from the storage medium (reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79)}
- G11B 2020/10814: {involving specific measures to prevent a buffer underrun}
- G11B 2020/1224: {extent, i.e. a set of sectors which numbers form a continuous ascending sequence}
- G11B 2220/2541: Blu-ray discs; Blue laser DVR discs
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- 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)

## Abstract

On a recording medium according to the present invention, extents for a base-view and a dependent-view are arranged alternately. The lower limit of the size of the base-view extents is the larger of a first lower limit value and a second lower limit value. The lower limit of the size of the dependent-view extent is a third lower limit value. The first lower limit value is determined so that, in monoscopic video playback, buffer underflow does not occur during jump periods between base-view extents. The second lower limit value is determined so that, in stereoscopic video playback, buffer underflow does not occur during read periods from each base-view extent to a next dependent-view extent. The third lower limit value is determined so that, in stereoscopic video playback, buffer underflow does not occur during read periods from each dependent-view extent to a next base-view extent.

## Claims

### Claim 1

A recording medium on which a base-view stream file used for monoscopic video playback and a dependent-view stream file used for stereoscopic video playback in combination with the base-view stream file are recorded,
the recording medium comprising a contiguous area in which a plurality of base-view extents belonging to the base-view stream file and a plurality of dependent-view extents belonging to the dependent-view stream file are arranged in an interleaved manner, wherein
a lower limit of a size of each base-view extent is a larger one of a first lower limit value and a second lower limit value,
the first lower limit value is determined so that, in monoscopic video playback, buffer underflow does not occur in a playback device during a jump period from each base-view extent to a next base-view extent,
the second lower limit value is determined so that, in stereoscopic video playback, buffer underflow does not occur in a playback device during a read period of a next dependent-view extent after each base-view extent,
a lower limit of a size of each dependent-view extent is a third lower limit value, and
the third lower limit value is determined so that, in stereoscopic video playback, buffer underflow does not occur in a playback device during a read period of a next base-view extent after each dependent-view extent.

### Claim 2 (depends on 1)

The recording medium in claim 1, wherein
a dependent-view extent is arranged at the head of the contiguous area,
an nth base-view extent has a size Sext1[n], where an integer n is larger than one,
during monoscopic video playback by a first playback device that includes a first read buffer and a first decoder, when (i) a jump time Tjump-2D(n) from the nth base-view extent to an (n+1)th base-view extent is required, (ii) each base-view extent is read into the first read buffer at a rate Rid-2D, and (iii) the base-view stream file is transferred from the first read buffer to the first decoder at a mean rate Rext1-2D, then the first lower limit value is expressed by the right-hand side of the following equation,
S
ext
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n
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ext
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,
an (n+1)th dependent-view extent located next after the nth base-view extent has a size Sext2[n+1],
during stereoscopic video playback by a second playback device that includes a second read buffer, a third read buffer, and a second decoder, when (i) each base-view extent is read into the second read buffer at a rate Rud-3D, (ii) each dependent-view extent is read into the third read buffer at a rate Rud-3D, and (iii) the base-view stream file is transferred from the second read buffer to the second decoder at a mean rate Rext1-3D, then the second lower limit value is expressed by the right-hand side of the following equation,
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,
and
during the stereoscopic video playback, when the dependent-view stream file is transferred from the third read buffer to the second decoder at a mean rate Rext2-3D, then the third lower limit value is expressed by the right-hand side of the following equation,
S
ext
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2
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[
n
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.

### Claim 3

A playback device for playing back video images from a recording medium, the playback device comprising:
a reading unit operable to read, from the recording medium, a base-view stream file used for monoscopic video playback and a dependent-view stream file used for stereoscopic video playback in combination with the base-view stream file;
a separation unit operable to separate extents from the read base-view stream file and the read dependent-view stream file;
a first read buffer storing, from among separated extents, base-view extents belonging to the base-view stream file;
a second read buffer storing, from among separated extents, dependent-view extents belonging to the dependent-view stream file; and
a decoder operable to receive, from each read buffer, compressed pictures included in each extent and to decode the compressed pictures,
the recording medium comprising a contiguous area in which a plurality of base-view extents and a plurality of dependent-view extents are arranged in an interleaved manner, wherein
a lower limit of a size of each base-view extent is a larger one of a first lower limit value and a second lower limit value,
the first lower limit value is determined so that, in monoscopic video playback, underflow does not occur in the first read buffer during a jump period from each base-view extent to a next base-view extent,
the second lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the first read buffer during a read period of a next dependent-view extent after each base-view extent,
a lower limit of a size of each dependent-view extent is a third lower limit value, and
the third lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the second read buffer during a read period of a next base-view extent after each dependent-view extent.

### Claim 4

An integrated circuit loaded on a playback device for playing back video images from a recording medium, the playback device comprising:
a reading unit operable to read, from the recording medium, a base-view stream file used for monoscopic video playback and a dependent-view stream file used for stereoscopic video playback in combination with the base-view stream file;
a separation unit operable to separate extents from the read base-view stream file and the read dependent-view stream file;
a first read buffer storing, from among separated extents, base-view extents belonging to the base-view stream file; and
a second read buffer storing, from among separated extents, dependent-view extents belonging to the dependent-view stream file,
the integrated circuit comprising:
a decoder operable to receive, from each read buffer, compressed pictures included in each extent and to decode the compressed pictures; and
a control unit operable to control provision of compressed pictures from each read buffer to the decoder,
the recording medium comprising a contiguous area in which a plurality of base-view extents and a plurality of dependent-view extents are arranged in an interleaved manner, wherein
a lower limit of a size of each base-view extent is a larger one of a first lower limit value and a second lower limit value,
the first lower limit value is determined so that, in monoscopic video playback, underflow does not occur in the first read buffer during a jump period from each base-view extent to a next base-view extent,
the second lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the first read buffer during a read period of a next dependent-view extent after each base-view extent,
a lower limit of a size of each dependent-view extent is a third lower limit value, and
the third lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the second read buffer during read period of a next base-view extent after each dependent-view extent