US5101274A
Expired / Lapsed
US
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Digital signal recording apparatus time-division multiplexing video and audio signals
Assignee: Canon Inc
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Filing: 1991-01-24
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Granted: 1992-03-31
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Expires: 2011-01-24
Abstract
Abstract A digital signal recording apparatus includes first circuitry for forming digital video data, and second circuitry for forming digital audio data. Third circuitry is provided for forming (a) video synchronizing blocks each of which comprises a predetermined number of digital video data and synchronizing data, and (b) audio synchronizing blocks each of which comprises a predetermined number of digital audio data and synchronizing data. Recording circuitry is provided for recording the video synchronizing blocks and the audio synchronizing blocks in tracks formed on a recording medium, the tracks being generally aligned in the direction of travel in the recording medium. The recording circuitry includes time-division multiplexing circuitry for time-division multiplexing a predetermined number of video synchronizing blocks and a predetermined number of audio synchronizing blocks to produce a data sequence for each of the tracks. The time-divison multiplexing circuitry produces different data sequences for neighboring tracks.
Inventors
- 👤 Katsuji Yoshimura
- 👤 Kenichi Nagasawa
- 👤 Motokazu Kashida
- 👤 Akihiro Shikakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:26
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; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N21/2368; H04N21/40; H04N21/43; H04N21/433; H04N21/4334; H04N21/434; H04N21/4341; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; 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: 17
Claim 1
Independent Claim
170 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 (1) video synchronizing blocks each of which comprises synchronizing data at a block start and a predetermined number of digital video data, and (2) audio synchronizing blocks each of which comprises synchronizing data at a block start and a predetermined number of digital audio data, the number of data of each of the video synchronizing blocks being the same as the number of data of each of the audio synchronizing blocks, and the number of digital video data of each of the video synchronizing blocks being larger than the number of digital audio data of each of the video synchronizing blocks; (d) time-division multiplexing means for time-division multiplexing a predetermined number of said video synchronizing blocks and a predetermined number of said audio synchronizing blocks to produce a data sequence; and (e) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 2
Dependent Claim
170 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 (1) video synchronizing blocks each of which comprises synchronizing data at a block start and a predetermined number of digital video data, and (2) audio synchronizing blocks each of which comprises synchronizing data at a block start and a predetermined number of digital audio data, the number of data of each of the video synchronizing blocks being the same as the number of data of each of the audio synchronizing blocks, and the number of digital video data of each of the video synchronizing blocks being larger than the number of digital audio data of each of the video synchronizing blocks; (d) time-division multiplexing means for time-division multiplexing a predetermined number of said video synchronizing blocks and a predetermined number of said audio synchronizing blocks to produce a data sequence; and (e) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 3
Dependent Claim
53 words
An apparatus according to claim 1, further comprising: first error correction coding means for forming first error correction codes which include first error check data and the digital video data; and second error correction coding means for forming second error correction codes which include second error check data and the digital audio data.
Claim 4
Dependent Claim
40 words
An apparatus according to claim 2, wherein the number of first error check data included in each of the video synchronizing blocks is smaller than the number of second error check data included in each of the audio synchronizing blocks.
Claim 5
Dependent Claim
59 words
An apparatus according to claim 3, wherein the sum of the number of the first error check data and the digital video data included in each of the video synchronizing blocks is the same as the sum of the number of the second error check data and the digital audio data included in each of the audio synchronizing blocks.
Claim 6
Dependent Claim
73 words
An apparatus according to claim 2, wherein each of the video synchronizing blocks includes a predetermined number of video data units each of which includes the first error check data at a unit end and the digital video data, and wherein each of the audio synchronizing blocks includes a predetermined number of audio data units each of which includes the second error check data at a unit end and the digital audio data.
Claim 7
Dependent Claim
51 words
An apparatus according to claim 5, wherein the number of the audio data units included in each of the audio synchronizing blocks is n times the number of the video data units included in each of the video synchronizing blocks, where n is an integer greater than or equal to 2.
Claim 8
Dependent Claim
43 words
An apparatus according to claim 5, wherein the number of data of each of the video data units is n times the number of data of each of the audio data units, where n is an integer greater than or equal to 2.
Claim 9
Dependent Claim
42 words
An apparatus according to claim 7, wherein the number of the first error check data included in each of video data units is the same as the number of the second error check data included in each of the audio data units.
Claim 10
Dependent Claim
246 words
A digital signal transmitting apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) first error correction coding means for forming first error correction codes which include first error check data and the digital video data; (d) second error correction coding means for forming second error correction codes which include second error check data and the digital audio data; (e) third means for forming (1) video synchronizing blocks each of which includes synchronizing data at a block start and a predetermined number of video data units, and (2) audio synchronizing blocks each of which includes synchronizing data at a block start and a predetermined number of audio data units, each of the video data units including the first error check data at a unit end and the digital video data, each of the audio data units including the second error check data at a unit end and the digital audio data, the number of the audio data units included in each of the audio synchronizing blocks being n times the number of the video data units included in each of the video synchronizing blocks, when n is an integer greater than or equal to 2; (f) time-division multiplexing means for time-division multiplexing a predetermined number of said video synchronizing blocks and a predetermined number of said audio synchronizing blocks to produce a data sequence; and (g) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 11
Dependent Claim
246 words
A digital signal transmitting apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) first error correction coding means for forming first error correction codes which include first error check data and the digital video data; (d) second error correction coding means for forming second error correction codes which include second error check data and the digital audio data; (e) third means for forming (1) video synchronizing blocks each of which includes synchronizing data at a block start and a predetermined number of video data units, and (2) audio synchronizing blocks each of which includes synchronizing data at a block start and a predetermined number of audio data units, each of the video data units including the first error check data at a unit end and the digital video data, each of the audio data units including the second error check data at a unit end and the digital audio data, the number of the audio data units included in each of the audio synchronizing blocks being n times the number of the video data units included in each of the video synchronizing blocks, when n is an integer greater than or equal to 2; (f) time-division multiplexing means for time-division multiplexing a predetermined number of said video synchronizing blocks and a predetermined number of said audio synchronizing blocks to produce a data sequence; and (g) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 12
Dependent Claim
43 words
An apparatus according to claim 9, wherein the number of the first error check data included in each of the video data units is the same as the number of the second error check data included in each of the audio data units.
Claim 13
Dependent Claim
196 words
A digital signal transmitting apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) first error correction coding means for forming first error correction code which include first error check data and the digital video data; (d) second error correction coding means for forming second error correction codes which include second error check data and the digital audio data; (e) third means for forming (1) video data units each of which includes the first error check data at a unit end and the digital video data, and (2) audio data units each of which includes the second error check data at a unit end and the digital audio data, the number of data of each of the video data units being n times the number of data of each of the audio data units, where n is the integer greater than or equal to 2; (f) time-division multiplexing means for time-division multiplexing a predetermined number of said video data units and a predetermined number of said audio data units to produce a data sequence; and (g) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 14
Dependent Claim
196 words
A digital signal transmitting apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) first error correction coding means for forming first error correction code which include first error check data and the digital video data; (d) second error correction coding means for forming second error correction codes which include second error check data and the digital audio data; (e) third means for forming (1) video data units each of which includes the first error check data at a unit end and the digital video data, and (2) audio data units each of which includes the second error check data at a unit end and the digital audio data, the number of data of each of the video data units being n times the number of data of each of the audio data units, where n is the integer greater than or equal to 2; (f) time-division multiplexing means for time-division multiplexing a predetermined number of said video data units and a predetermined number of said audio data units to produce a data sequence; and (g) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 15
Dependent Claim
215 words
A digital signal transmitting apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) first error correction coding means for forming first error correction codes which include first error check data and the digital video data; (d) second error correction coding means for forming second error correction codes which include second error check data and the digital audio data; (e) third means for forming (1) video synchronizing blocks each of which includes synchronizing data at a block start, a predetermined number of the first error check data, and a predetermined number of the digital video data, and (2) audio synchronizing blocks each of which includes synchronizing data at a block start, a predetermined number of the second error check data, and a predetermined number of the digital audio data, the number of the first error check data included in each of the video synchronizing blocks being smaller than the number of the second error check data included in each of the audio synchronizing blocks; (f) time-division multiplexing means for time-division multiplexing a predetermined number of said video synchronizing blocks and a predetermined number of said audio synchronizing blocks to produce a data sequence; and (g) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 16
Dependent Claim
215 words
A digital signal transmitting apparatus, comprising: (a) first means for forming digital video data; (b) second means for forming digital audio data; (c) first error correction coding means for forming first error correction codes which include first error check data and the digital video data; (d) second error correction coding means for forming second error correction codes which include second error check data and the digital audio data; (e) third means for forming (1) video synchronizing blocks each of which includes synchronizing data at a block start, a predetermined number of the first error check data, and a predetermined number of the digital video data, and (2) audio synchronizing blocks each of which includes synchronizing data at a block start, a predetermined number of the second error check data, and a predetermined number of the digital audio data, the number of the first error check data included in each of the video synchronizing blocks being smaller than the number of the second error check data included in each of the audio synchronizing blocks; (f) time-division multiplexing means for time-division multiplexing a predetermined number of said video synchronizing blocks and a predetermined number of said audio synchronizing blocks to produce a data sequence; and (g) transmitting means for transmitting said data sequence to a transmitting medium.
Claim 17
Dependent Claim
33 words
An apparatus according to claim 12, wherein the number of data of each of the video synchronizing blocks is the same as the number of data of each of the audio synchronizing blocks.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |