Reproduction device, recording medium, program, and reproduction method
First Claim
1. A non-transitory computer-readable recording medium having recorded thereon a subtitle stream to be played back in synchronization with a video stream and PlayList information, whereinthe PlayList information includes main playback section information and sub playback section information,the main playback section information includes information that indicates a playback start point and a playback end point of the video stream, and a stream number table,the sub playback section information includes information that indicates a playback start point and a playback end point of a subtitle stream and synchronization information that indicates a synchronization time at which the subtitle stream synchronizes with the video stream,the stream number table includes an entry arrangement of a plurality of entries corresponding one-to-one to the subtitle streams including a graphics subtitle stream that is multiplexed with the video stream or one of a graphics subtitle stream and a text subtitle stream that is not multiplexed with the video stream,the entries are arranged in accordance with a priority order of the subtitle streams corresponding one-to-one to the entries,the text subtitle stream includes a text code, and is playable by converting the text code to a bitmap image using a font, andif a plurality of subtitle streams from among the subtitle streams satisfy a condition on “
- whether playable by the playback apparatus”
, the priority order is used as a criterion for preferentially selecting one subtitle stream from among the plurality of subtitle streams.
2 Assignments
0 Petitions
Accused Products
Abstract
When reading an AV Clip which is formed by multiplexing a plurality of elementary streams from a BD-ROM and playing back the AV Clip, an STN_table that lists an entry of each elementary stream is acquired from PlayList information on the BD-ROM. For each elementary stream shown in the STN_table, a judgment is made as to whether the elementary stream satisfies a predetermined condition. Of all elementary streams judged as satisfying the predetermined condition, an elementary stream having a highest entry in the STN_table is selected and played back.
10 Citations
8 Claims
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1. A non-transitory computer-readable recording medium having recorded thereon a subtitle stream to be played back in synchronization with a video stream and PlayList information, wherein
the PlayList information includes main playback section information and sub playback section information, the main playback section information includes information that indicates a playback start point and a playback end point of the video stream, and a stream number table, the sub playback section information includes information that indicates a playback start point and a playback end point of a subtitle stream and synchronization information that indicates a synchronization time at which the subtitle stream synchronizes with the video stream, the stream number table includes an entry arrangement of a plurality of entries corresponding one-to-one to the subtitle streams including a graphics subtitle stream that is multiplexed with the video stream or one of a graphics subtitle stream and a text subtitle stream that is not multiplexed with the video stream, the entries are arranged in accordance with a priority order of the subtitle streams corresponding one-to-one to the entries, the text subtitle stream includes a text code, and is playable by converting the text code to a bitmap image using a font, and if a plurality of subtitle streams from among the subtitle streams satisfy a condition on “ - whether playable by the playback apparatus”
, the priority order is used as a criterion for preferentially selecting one subtitle stream from among the plurality of subtitle streams. - View Dependent Claims (2, 3)
- whether playable by the playback apparatus”
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4. A playback apparatus for selecting one subtitle stream from among a plurality of subtitle streams recorded on a recording medium, and playing back the selected subtitle stream in synchronization with a video stream, wherein
the recording medium stores thereon PlayList information that includes main playback section information and sub playback section information, the main playback section information includes information that indicates a playback start point and a playback end point of the video stream, and a stream number table, the sub playback section information includes information that indicates a playback start point and a playback end point of a subtitle stream and synchronization information that indicates a synchronization time at which the subtitle stream synchronizes with the video stream, the stream number table includes an entry arrangement of a plurality of entries corresponding one-to-one to the subtitle streams including a graphics subtitle stream that is multiplexed with the video stream or one of a graphics subtitle stream and a text subtitle stream that is not multiplexed with the video stream, the entries are arranged in accordance with a priority order of the subtitle streams corresponding one-to-one to the entries, the playback apparatus comprises: -
a selection unit operable to judge whether each of the subtitle streams satisfies a condition on “
whether playable by the playback apparatus”
, and select, as a subtitle stream to be played back in synchronization with the video stream, one subtitle stream that at least satisfies the condition from among the subtitle streams;a graphics decoder operable to decode the graphics subtitle stream; and a generator operable to convert a text code included in the text subtitle stream to a bitmap image using a font for display, and if a plurality of subtitle streams from among the subtitle streams satisfy the condition on “
whether playable by the playback apparatus”
, the selection unit selects one subtitle stream from among the plurality of subtitle streams that satisfy the condition, as a subtitle stream to be played back in synchronization with the video stream, in accordance with the priority order. - View Dependent Claims (5, 6)
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7. A recording method for recording, on a recording medium, a subtitle stream to be played back in synchronization with a video stream and PlayList information, wherein
the PlayList information includes main playback section information and sub playback section information, the main playback section information includes information that indicates a playback start point and a playback end point of the video stream, and a stream number table, the sub playback section information includes information that indicates a playback start point and a playback end point of a subtitle stream and synchronization information that indicates a synchronization time at which the subtitle stream synchronizes with the video stream, the stream number table includes an entry arrangement of a plurality of entries corresponding one-to-one to the subtitle streams including a graphics subtitle stream that is multiplexed with the video stream or one of a graphics subtitle stream and a text subtitle stream that is not multiplexed with the video stream, the entries are arranged in accordance with a priority order of the subtitle streams corresponding one-to-one to the entries, the text subtitle stream includes a text code, and is able to be played back by converting the text code to a bitmap image using a font, and if a plurality of subtitle streams from among the subtitle streams satisfy a condition on “ - whether playable by the playback apparatus”
, the priority order of the subtitle streams is used for preferentially selecting a subtitle stream from among the plurality of subtitle streams that satisfy the condition.
- whether playable by the playback apparatus”
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8. A playback method for selecting one subtitle stream from among a plurality of subtitle streams recorded on a recording medium, and playing back the selected subtitle stream in synchronization with a video stream, wherein
the recording medium stores thereon PlayList information that includes main playback section information and sub playback section information, the main playback section information includes information that indicates a playback start point and a playback end point of the video stream, and a stream number table, the sub playback section information includes information that indicates a playback start point and a playback end point of a subtitle stream and synchronization information that indicates a synchronization time at which the subtitle stream synchronizes with the video stream, the stream number table includes an entry arrangement of a plurality of entries corresponding one-to-one to the subtitle streams including a graphics subtitle stream that is multiplexed with the video stream or one of a graphics subtitle stream and a text subtitle stream that is not multiplexed with the video stream, the entries are arranged in accordance with a priority order of the subtitle streams corresponding one-to-one to the entries, the playback method comprises: -
a selection step for judging whether each of the subtitle streams satisfies a condition on “
whether playable by a playback apparatus”
, and selecting, as a subtitle stream to be played back in synchronization with the video stream, one subtitle stream that at least satisfies the condition from among the subtitle streams;a graphics decoding step for decoding the graphics subtitle stream; and a generating step for converting a text code included in the text subtitle stream to a bitmap image using a font for display, and if a plurality of subtitle streams from among the subtitle streams satisfy the condition on “
whether playable by the playback apparatus”
, the selection step selects one subtitle stream from among the plurality of subtitle streams that satisfy the condition, as a subtitle stream to be played back in synchronization with the video stream, in accordance with the priority order.
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Specification