US5161171A
Expired / Lapsed
US
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Digital data transmitting apparatus
Assignee: Sony Corp
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Filing: 1990-09-19
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Granted: 1992-11-03
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Expires: 2010-09-19
Abstract
Abstract In an apparatus for transmitting digital data which includes information data and synchronous data having a plural-byte code arranged in a plural-byte code of the information data; the top bit position of the sync code is predicted by converting the transmitted digital data into parallel data at a desired timing and then comparing each byte of the parallel data with a particular byte of the sync code; and the sync code is detected in the transmitted digital data by first extracting, from the parallel data, a length corresponding to the plural-byte sync code starting from the predicted top bit position of the sync code and then comparing the extracted parallel data with the sync code.
Inventors
- 👤 Hideto Suzuki
- 👤 Yoshikazu Kurose
- 👤 Shinji Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:31
CPC Classifications
H; H03; H03M; H03M7/00; H03M13/00; H03M13/25; H03M13/253; G; G11; G11B; G11B20/00; G11B20/10; G11B20/12; G11B20/1201; G11B20/1207; G11B20/1209; G11B20/18; G11B20/1806; G11B20/1809; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; H03M13/03; H03M13/05; H03M13/13; H03M13/15; H03M13/151; H03M13/1515; H03M13/251; H03M13/29; H03M13/2906; H03M13/2909; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
An apparatus for reproducing digital data which includes information data and synchronous data, and in which said synchronous data has a plural-byte code arranged in a plural-byte code of said information data, said apparatus comprising: serial-to-parallel converter means for converting a serial data stream of said digital data to a parallel data stream; detector means for detecting a position of a first-byte code of said synchronous data by comparing each byte of said parallel data stream with a predetermined byte of said synchronous data and providing an output signal corresponding to the detected position; extractor means for extracting a portion of said synchronous data having said plural-byte code from said parallel data stream in response to said output signal from said detector means; and comparator means for comparing the extracted portion of said synchronous data with a predetermined pattern of data having a plural-byte code so as to generate a signal when said extracted portion of said synchronous data coincides with said predetermined pattern.
Claim 2
Independent Claim
164 words
An apparatus for reproducing digital data which includes information data and synchronous data, and in which said synchronous data has a plural-byte code arranged in a plural-byte code of said information data, said apparatus comprising: serial-to-parallel converter means for converting a serial data stream of said digital data to a parallel data stream; detector means for detecting a position of a first-byte code of said synchronous data by comparing each byte of said parallel data stream with a predetermined byte of said synchronous data and providing an output signal corresponding to the detected position; extractor means for extracting a portion of said synchronous data having said plural-byte code from said parallel data stream in response to said output signal from said detector means; and comparator means for comparing the extracted portion of said synchronous data with a predetermined pattern of data having a plural-byte code so as to generate a signal when said extracted portion of said synchronous data coincides with said predetermined pattern.
Claim 3
Independent Claim
157 words
An apparatus for detecting a plurality of plural-byte sync codes in reproduced digital data which includes information data and synchronous data, in which said synchronous data has each of said plural-byte sync codes arranged in a plural-byte code of said information data, said apparatus comprising: serial-to-parallel converting means for converting a serial data stream of said digital data to a parallel data stream; detector means comparing each byte of said parallel data stream with at least one byte of predetermined data for detecting a first bit position of one of the sync codes; extracting means for extracting from said parallel data stream a predetermined length of the respective sync code starting from the detected first bit position of the sync code; and means for comparing said predetermined length of said respective sync code extracted from said parallel data stream with a predetermined pattern of data having a code so as to detect the respective plural-byte sync code.
Claim 4
Independent Claim
157 words
An apparatus for detecting a plurality of plural-byte sync codes in reproduced digital data which includes information data and synchronous data, in which said synchronous data has each of said plural-byte sync codes arranged in a plural-byte code of said information data, said apparatus comprising: serial-to-parallel converting means for converting a serial data stream of said digital data to a parallel data stream; detector means comparing each byte of said parallel data stream with at least one byte of predetermined data for detecting a first bit position of one of the sync codes; extracting means for extracting from said parallel data stream a predetermined length of the respective sync code starting from the detected first bit position of the sync code; and means for comparing said predetermined length of said respective sync code extracted from said parallel data stream with a predetermined pattern of data having a code so as to detect the respective plural-byte sync code.
Claim 5
Dependent Claim
42 words
An apparatus as in claim 2; further comprising means for utilizing one of a previously detected sync code and a subsequently detected sync code in the event of a failure to detect the respective plural-byte sync code in said reproduced digital data.
Claim 6
Dependent Claim
55 words
An apparatus as in claim 3; in which said means for utilizing uses the sync code last previously detected when said failure to detect occurs for more than a predetermined period, and said means for utilizing uses the subsequent sync code next detected when said failure to detect occurs for less than said predetermined period.
References Cited (Backward Citations)
US4984238A
Cited
US4890304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-03 | 1996-05-04 | 1996-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-03 | 2000-05-04 | 2000-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-03 | 2004-05-04 | 2004-11-03 | $7700.00 | Window Closed / Lapsed |