Patent US5740306A successfully refreshed from Google Patents.
US5740306A
Expired / Lapsed
US
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Digital signal recording device and playback device
Assignee: Mitsubishi Electric Corp
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Filing: 1996-01-19
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Granted: 1998-04-14
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Expires: 2016-01-19
Abstract
Abstract In a digital signal recording and playback device, the transmission rate of input transport packets is identified. A recording mode, a rate at which data is to be recorded, is set on the basis of the identified transmission rate. Intra-frame or intra-field coded digital video data is extracted from the transport packets, and the extracted intra-frame or intra-field coded digital video data is reconstructed to generate special playback data. A recording format is generated such that the input transport packets and special playback data will be recorded at predefined positions on a track of a recording medium. The number of repetitions of the special playback data to be recorded on the recording medium or the recording format is varied depending on the recording mode. Because of the improvement in the recording rate of the fast playback data, the playback picture quality during fast playback can be improved.
Inventors
- 👤 Junko Shinohara
- 👤 Sadayuki Inoue
- 👤 Tatsuo Yamasaki
- 👤 Ken Onishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:08
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N5/00; H04N5/76; H04N5/91; H04N5/92; G; G11; G11B; G11B15/00; G11B15/02; G11B15/05; G11B15/087; G11B15/12; G11B15/125; G11B15/18; G11B15/1808; G11B15/1875; G11B15/46; G11B15/467; G11B15/4673; G11B15/4675; G11B15/4676; G11B15/4677; G11B15/4678; G11B15/52; G11B20/00; G11B20/10; G11B20/12; G11B20/1201; G11B20/1207; G11B27/00; G11B27/005; G11B2220/00; G11B2220/90; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3063; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/783; H04N9/797; H04N9/7973; H04N9/82; H04N9/8205; H04N9/8227; H04N9/87; H04N9/877
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
167 words
A digital signal recording device for recording data on a recording medium, comprising: transmission rate identifying means for receiving a data signal including a plurality of transport packets, and for identifying a transmission rate of the transport packets; recording mode setting means for setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; data extracting means for extracting intraframe or intra-field coded digital video data from the transport packets; special playback data generating means for generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data; and recording means for generating recording format such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium, for recording the transport packets and the special playback data according to the generated recording format, and for varying a number of repetitions of the special playback data based on the set recording mode.
Claim 2
Dependent Claim
167 words
A digital signal recording device for recording data on a recording medium, comprising: transmission rate identifying means for receiving a data signal including a plurality of transport packets, and for identifying a transmission rate of the transport packets; recording mode setting means for setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; data extracting means for extracting intraframe or intra-field coded digital video data from the transport packets; special playback data generating means for generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data; and recording means for generating recording format such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium, for recording the transport packets and the special playback data according to the generated recording format, and for varying a number of repetitions of the special playback data based on the set recording mode.
Claim 3
Dependent Claim
45 words
The digital signal recording device according to claim 1, wherein the recording means generates the recording format such that the special playback data is positioned along scanning traces which a head scans at a fast playback speed for one of the plurality of recording modes.
Claim 4
Dependent Claim
27 words
The digital signal recording device according to claim 1, wherein the special playback data generating means generates the special playback data in the form of transport packets.
Claim 5
Dependent Claim
27 words
The digital signal recording device according to claim 1, wherein the special playback data generating mean generates the special playback data in the form of transport packets.
Claim 6
Dependent Claim
28 words
The digital signal recording device according to claim 1, wherein the recording means records the transport packets and the special playback data in the form of sync blocks.
Claim 7
Dependent Claim
21 words
The digital signal recording device according to claim 5, wherein the recording means converts two transport packets into five sync blocks.
Claim 8
Dependent Claim
26 words
The digital signal recording device according to claim 1, wherein the recording means generates a same recording format for each of the plurality of recording modes.
Claim 9
Dependent Claim
163 words
A digital signal recording device for recording data on a recording medium, comprising: transmission rate identifying means for receiving a data signal including a plurality of transport packets, and for identifying a transmission rate of the transport packets; recording mode setting means for setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; data extracting means for extracting intraframe or intra-field coded digital video data from the transport packets; special playback data generating means for generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data ; and recording means for generating a recording format based on the set recording mode, and for recording the transport packets and the special playback data according to the generated recording format, the generated recording format being such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium.
Claim 10
Dependent Claim
163 words
A digital signal recording device for recording data on a recording medium, comprising: transmission rate identifying means for receiving a data signal including a plurality of transport packets, and for identifying a transmission rate of the transport packets; recording mode setting means for setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; data extracting means for extracting intraframe or intra-field coded digital video data from the transport packets; special playback data generating means for generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data ; and recording means for generating a recording format based on the set recording mode, and for recording the transport packets and the special playback data according to the generated recording format, the generated recording format being such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium.
Claim 11
Dependent Claim
46 words
The digital signal recording device according to claim 8, wherein the recording means generates the recording format such that the special playback data is positioned along scanning traces which a head scans at a fast playback speed for each one of the plurality of recording modes.
Claim 12
Dependent Claim
51 words
The digital signal recording device according to claim 9, wherein the recording means generates the recording format such that the special playback data is positioned along scanning traces which a head scanning a subcode area also scans at a fast playback speed for each one of the plurality of recording modes.
Claim 13
Dependent Claim
20 words
The digital signal recording device of claim 10, wherein the scanned subcode area stores data other than special playback data.
Claim 14
Dependent Claim
21 words
The digital signal recording device according to claim 8, wherein the recording means converts two transport packets into five sync blocks.
Claim 15
Dependent Claim
26 words
The digital signal recording device according to claim 8, wherein the recording means generates a same recording format for each of the plurality of recording modes.
Claim 16
Dependent Claim
26 words
The digital signal recording device according to claim 8, wherein the recording means generates a different recording format for each of the plurality of recording modes.
Claim 17
Dependent Claim
169 words
A digital signal playback device reproducing data from a recording medium comprising: playback means for reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; recording mode detecting means for detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; and recording medium travel speed control means for controlling a travel speed of the recording medium based on the detected recording mode such that when the recording medium has been recorded at a travel speed 1/K times the speed for a standard recording mode, during a fast playback, the recording medium travel speed control means sets a driving speed for the recording medium substantially at a {±K*(N+1/2)}x speed where N denotes a positive integer and 2*K*(N+1/2)≦M*K, where M denotes a number of repetitions of the special playback data corresponding to the fast playback.
Claim 18
Dependent Claim
169 words
A digital signal playback device reproducing data from a recording medium comprising: playback means for reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; recording mode detecting means for detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; and recording medium travel speed control means for controlling a travel speed of the recording medium based on the detected recording mode such that when the recording medium has been recorded at a travel speed 1/K times the speed for a standard recording mode, during a fast playback, the recording medium travel speed control means sets a driving speed for the recording medium substantially at a {±K*(N+1/2)}x speed where N denotes a positive integer and 2*K*(N+1/2)≦M*K, where M denotes a number of repetitions of the special playback data corresponding to the fast playback.
Claim 19
Dependent Claim
137 words
A digital signal playback device reproducing data from a recording medium, comprising: playback means for reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; recording mode detecting means for detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; recording medium travel speed control means for controlling a travel speed of the recording medium based on the detected recording mode; and tracking control means for controlling tracking such that a head scans a subcode area during fast playback at a predefined fast playback speed for the detected recording mode, the scanned subcode area storing data other than special playback data.
Claim 20
Dependent Claim
137 words
A digital signal playback device reproducing data from a recording medium, comprising: playback means for reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; recording mode detecting means for detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; recording medium travel speed control means for controlling a travel speed of the recording medium based on the detected recording mode; and tracking control means for controlling tracking such that a head scans a subcode area during fast playback at a predefined fast playback speed for the detected recording mode, the scanned subcode area storing data other than special playback data.
Claim 21
Independent Claim
141 words
A method of recording digital data on a recording medium, comprising: receiving a data signal including a plurality of transport packets; identifying a transmission rate of the transport packets; setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; extracting intra-frame or intra-field coded digital video data from the transport packets; generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data; generating a recording format such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium; and recording the transport packets and the special playback data according to the generated recording format such that a number of repetitions of the special playback data are varied based on the set recording mode.
Claim 22
Independent Claim
141 words
A method of recording digital data on a recording medium, comprising: receiving a data signal including a plurality of transport packets; identifying a transmission rate of the transport packets; setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; extracting intra-frame or intra-field coded digital video data from the transport packets; generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data; generating a recording format such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium; and recording the transport packets and the special playback data according to the generated recording format such that a number of repetitions of the special playback data are varied based on the set recording mode.
Claim 23
Independent Claim
133 words
A method of recording digital data on a recording medium, comprising: receiving a data signal including a plurality of transport packets; identifying a transmission rate of the transport packets; setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; extracting intra-frame or intra-field coded digital video data from the transport packets; generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data; generating a recording format based on the set recording mode; and recording the transport packets and the special playback data according to the generated recording format, the generated recording format being such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium.
Claim 24
Independent Claim
133 words
A method of recording digital data on a recording medium, comprising: receiving a data signal including a plurality of transport packets; identifying a transmission rate of the transport packets; setting a recording mode based on the identified transmission rate, the recording mode being a rate at which to record data on the recording medium; extracting intra-frame or intra-field coded digital video data from the transport packets; generating special playback data by reconstructing the extracted intra-frame or intra-field coded digital video data; generating a recording format based on the set recording mode; and recording the transport packets and the special playback data according to the generated recording format, the generated recording format being such that the transport packets and the special playback data are recorded at predefined positions on tracks of the recording medium.
Claim 25
Independent Claim
147 words
A method of reproducing digital data from a recording medium, comprising: reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; and controlling a travel speed of the recording medium based on the detected recording mode such that when the recording medium has been recorded at a travel speed 1/K times the speed for a standard recording mode, during a fast playback, a driving speed for the recording medium is set substantially at a {+K*(N+1/2)}x speed, where N denotes a positive integer and 2*K*(N+1/2)≦M*K, where M denotes a number of repetitions of the special playback data corresponding to the fast playback.
Claim 26
Independent Claim
147 words
A method of reproducing digital data from a recording medium, comprising: reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; and controlling a travel speed of the recording medium based on the detected recording mode such that when the recording medium has been recorded at a travel speed 1/K times the speed for a standard recording mode, during a fast playback, a driving speed for the recording medium is set substantially at a {+K*(N+1/2)}x speed, where N denotes a positive integer and 2*K*(N+1/2)≦M*K, where M denotes a number of repetitions of the special playback data corresponding to the fast playback.
Claim 27
Independent Claim
117 words
A method of reproducing digital data from a recording medium, comprising: reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; controlling a travel speed of the recording medium based on the detected recording mode; and controlling tracking such that a head scans a subcode area during fast playback at a predefined fast playback speed for the detected recording mode, the scanned subcode area storing data other than special playback data.
Claim 28
Independent Claim
117 words
A method of reproducing digital data from a recording medium, comprising: reproducing data from the recording medium to generate a playback signal, the data including special playback data recorded in predetermined areas repeatedly a plurality of times on tracks of the recording medium; detecting a recording mode from the playback signal, the recording mode being a rate at which the data was recorded on the recording medium; controlling a travel speed of the recording medium based on the detected recording mode; and controlling tracking such that a head scans a subcode area during fast playback at a predefined fast playback speed for the detected recording mode, the scanned subcode area storing data other than special playback data.
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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) | 2001-04-13 | 2001-10-13 | 2002-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-13 | 2005-10-13 | 2006-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-13 | 2009-10-13 | 2010-04-14 | $7700.00 | Window Closed / Lapsed |