EP0554967A2
Expired / Lapsed
EP
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Digital video signal transmission apparatus
Assignee: Canon Inc
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Filing: 1988-08-09
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Granted: —
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Expires: 2008-08-09
Abstract
Abstract A digital signal transmission apparatus for transmitting digital video signal and digital audio signal, in which the number of data of an audio synchronizing block containing audio data and synchronizing data is selected equal to the number of data of a video synchronizing block containing video data and synchronizing data, and these data are transmitted on time division basis.
Inventors
- 👤 Katsuji c/o Canon Kabushiki Kaisha Yoshimura
- 👤 Kenichi c/o Canon Kabushiki Kaisha Nagasawa
- 👤 Motokazu c/o Canon Kabushiki Kaisha Kashida
- 👤 Akihiro C/O Canon Kabushiki Kaisha Shikakura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/87; H04N9/88; H04N9/888; G; G11; G11B; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3036; G11B27/3063; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/78266; H04N9/80; H04N9/804; H04N9/8042; H04N9/806; H04N9/8063; H04N9/8066; H04N9/808; H04N9/8081; H04N9/8085; H04N9/8087; H04N9/8088; H04N9/82; H04N9/8205; H04N9/8211; H04N9/8216
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
91 words
A digital signal transmitting apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) third means for forming video synchronizing blocks containing said digital video data and synchronizing data and audio synchronizing blocks containing said digital audio data and synchronizing data, wherein the number of data in said video synchronizing block is same as the number of data in said audio synchronizing block; and (d) transmission means for transmitting said video synchronizing blocks and said audio synchronizing blocks on time division basis.
Claim 2
Dependent Claim
37 words
An apparatus according to claim 1, wherein said transmission means comprises digital modulation means for effecting digital modulation on a data sequence containing said video synchronizing blocks and said audio synchronizing blocks in time division multiplex basis.
Claim 3
Dependent Claim
54 words
An apparatus according to claim 1, wherein said third means comprises time division multiplexing means for time-divided multiplexing of said digital video data and said digital audio data by the unit of a predetermined number of data and synchronization addition means for adding synchronising data to the output data of said time-division multiplexing means.
Claim 4
Dependent Claim
44 words
An apparatus according to claim 1, furhter comprising a first error check code encoder for adding a first error check code to said digital video data, and a second error check code for adding a second error check code to said digital audio data.
Claim 5
Dependent Claim
28 words
An apparatus according to claim 4, wherein said video synchronizing block contain said first error check code, and said audio synchronizing block contains said second error check code.
Claim 6
Dependent Claim
71 words
An apparatus according to claim 5, wherein said third means comprises time division multiplexing means for time-divided multiplexing of the digital video data with said first error check code added thereto and the digital audio data with said second error check code added thereto by the unit of a predetermined number of data, and synchronization addition means for adding synchronizing data to the output data of said time division multiplexing means.
Claim 7
Dependent Claim
29 words
An apparatus according to claim 1, wherein said audio synchronizing block contains subcode data other than said digital audio data, said synchronizing data and said second error check code.
Claim 8
Dependent Claim
14 words
An apparatus according to claim 7, wherein said subcode data contains a time code.
Claim 9
Dependent Claim
36 words
An apparatus according to claim 1, wherein, in the data sequence containing said video synchronizing blocks and said audio synchronizing blocks on time division multiplex basis, plural audio synchronizing blocks do not appear in consecutive manner.
Claim 10
Dependent Claim
22 words
An apparatus according to claim 9, wherein said transmission means comprises recording means for recording said data sequence on a recording medium.
Claim 11
Dependent Claim
47 words
An apparatus according to claim 1, wherein said transmission means comprises means for changing the order of transmission of said video synchronizing blocks and said audio synchronizing blocks in the data sequence containing said video synchronizing blocks and said audio synchronizing blocks in time division multiplex basis.
Claim 12
Dependent Claim
69 words
A digital signal processing device, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) time division multiplexing means for time division multiplexing of said digital video data and said digital audio data in the unit of a predetermined number of data; and (d) synchronization addition means for adding synchronizing data to the output data of said time division multiplexing means.
Claim 13
Dependent Claim
29 words
A device according to claim 12, further comprising modulation means for digital modulation of the data sequence to which synchronizing data have been added by said synchronization addition means.
Claim 14
Dependent Claim
43 words
A device according to claim 12, further comprising a first error check encoder for adding a first error check code to said digital video data, and a second error check encoder for adding a second error check code to said digital audio data.
Claim 15
Dependent Claim
59 words
A device according to claim 14, wherein said time-division multiplexing means effects time division multiplexing of the digital video data with said first error check code added thereto and the digital audio data with said second error check code added thereto, and said synchronization addition means adds synchronizing data to the output data of said time division multiplexing means.
Claim 16
Dependent Claim
98 words
A digital signal recording apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) third means for forming video synchronizing blocks containing said digital video data and synchronizing data, and audio synchronizing blocks containing said digital audio data and synchronizing data; and (d) recording means for recording said video synchronizing blocks and said audio synchronizing blocks on time division basis, wherein said audio synchronizing blocks are positioned in dispersed manner in the data sequence containing said video synchronizing blocks and said audio synchronizing blocks on time division multiplex basis.
Claim 17
Dependent Claim
28 words
An apparatus according to claim 16, wherein the number of data of said video synchronizing block is same as the number of data in said audio synchronizing block.
Claim 18
Dependent Claim
36 words
An apparatus according to claim 17, wherein, in the data sequence containing said video synchronizing blocks and said audio synchronizing blocks on time division multiplex basis, plural audio synchronizing blocks do not appear in consecutive manner.
Claim 19
Dependent Claim
52 words
An apparatus according to claim 16, wherein said recording medium is a tape-form recording medium, and said recording means is adapted to record the data sequence containing said video synchronizing blocks and said audio synchronizing blocks on time division multiplex basis, by successively forming plural parallel tracks on said tape-form recording medium.
Claim 20
Dependent Claim
31 words
An apparatus according to claim 19, wherein said recording means functions in such a manner as to disperse said audio synchronizing blocks in the longitudinal direction of said tape-form recording medium.
Claim 21
Dependent Claim
37 words
An apparatus according to claim 20, wherein said recording means functions in such a manner that said audio synchronizing blocks are not aligned in the mutually neighboring tracks, in the longitudinal direction of said tape-form recording medium.
Claim 22
Dependent Claim
103 words
A signal recording apparatus, comprising: (a) first input means for entering video signal; (b) second input means for entering audio signal; (c) time division multiplexing means for time-division multiplexing of said video signal and said audio signal; and (d) means for recording signals time-divided multiplexed by said time division multiplexing means by successively forming plural parallel tracks on a tape-form recording medium, wherein said recording means is adapted to function in such a manner that the recorded areas of said audio signal do not align, in the neighboring tracks in said plural parallel tracks, in the longitudinal direction of the tape-form recording medium.
Claim 23
Dependent Claim
26 words
A digital signal transmitting or recording method or device in which blocks of digital video data and blocks of digital audio data are time division multiplexed.
References Cited (Backward Citations)
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