CA2473171A1 - Digital vcr with non-standard speed playback - Google Patents
Digital vcr with non-standard speed playbackInfo
- Publication number
- CA2473171A1 CA2473171A1 CA002473171A CA2473171A CA2473171A1 CA 2473171 A1 CA2473171 A1 CA 2473171A1 CA 002473171 A CA002473171 A CA 002473171A CA 2473171 A CA2473171 A CA 2473171A CA 2473171 A1 CA2473171 A1 CA 2473171A1
- Authority
- CA
- Canada
- Prior art keywords
- trick play
- reproduction
- advanced television
- reproduced
- recorded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007704 transition Effects 0.000 abstract 2
Landscapes
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
A digital video cassette recorder records a high definition signal having an MPEG compatible structure, such as a proposed Grand Alliance signal. In the recorded format an advanced television frame occupies ten recorded tracks.
Reproduction at speeds other than the recorded speed is termed "Trick Play". Reproduction in a "Trick Play" mode necessitates a reproducing head crossing a plurality of recorded tracks.
However, since the advanced television signal is structured as groups of pictures comprising one interframe coded frame and a plurality of predicted frames, many of the recorded tracks contain data representing predicted frames. Thus an advanced television signal reproduced in "Trick Play" may represent a jumble of unrelated data segments. Operation in "Trick Play" may be facilitated by the selection of predetermined replay speeds and the allocation of specific locations within each track from which data may be reproduced. These specific track locations are utilized during recording to place advanced television image data for reproduction during "Trick Play" operation. The "Trick Play"
image data is also reproduced during normal playback but may not be utilized. The specific track locations are selected to facilitate "Trick Play" operation at a plurality of speeds in both forward and reverse directions. Since the advanced television signal comprises a plurality of predicted frames, transition from "Trick Play" to normal speed replay requires a control function which is responsive to the reproduction, at normal replay speed, of an interframe coded frame. Various methods of reproduced image transition are disclosed for selecting both to and from "Trick Play" reproduction.
Reproduction at speeds other than the recorded speed is termed "Trick Play". Reproduction in a "Trick Play" mode necessitates a reproducing head crossing a plurality of recorded tracks.
However, since the advanced television signal is structured as groups of pictures comprising one interframe coded frame and a plurality of predicted frames, many of the recorded tracks contain data representing predicted frames. Thus an advanced television signal reproduced in "Trick Play" may represent a jumble of unrelated data segments. Operation in "Trick Play" may be facilitated by the selection of predetermined replay speeds and the allocation of specific locations within each track from which data may be reproduced. These specific track locations are utilized during recording to place advanced television image data for reproduction during "Trick Play" operation. The "Trick Play"
image data is also reproduced during normal playback but may not be utilized. The specific track locations are selected to facilitate "Trick Play" operation at a plurality of speeds in both forward and reverse directions. Since the advanced television signal comprises a plurality of predicted frames, transition from "Trick Play" to normal speed replay requires a control function which is responsive to the reproduction, at normal replay speed, of an interframe coded frame. Various methods of reproduced image transition are disclosed for selecting both to and from "Trick Play" reproduction.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9407287.3 | 1994-04-13 | ||
GB9407283A GB9407283D0 (en) | 1994-04-13 | 1994-04-13 | Trick play in atv digital vcr system |
GB9407283.2 | 1994-04-13 | ||
GB9407287A GB9407287D0 (en) | 1994-04-13 | 1994-04-13 | Picture compensation in moving from trick mode to normal mode |
GB9410309.0 | 1994-05-23 | ||
GB9410309A GB9410309D0 (en) | 1994-05-23 | 1994-05-23 | Trick play in an atv digital vcr sync block allocation |
CA002186583A CA2186583C (en) | 1994-04-13 | 1995-04-03 | Digital vcr with non-standard speed playback |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002186583A Division CA2186583C (en) | 1994-04-13 | 1995-04-03 | Digital vcr with non-standard speed playback |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2473171A1 true CA2473171A1 (en) | 1995-10-26 |
CA2473171C CA2473171C (en) | 2005-08-09 |
Family
ID=27427298
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002473171A Expired - Fee Related CA2473171C (en) | 1994-04-13 | 1995-04-03 | Digital vcr with non-standard speed playback |
CA002387418A Expired - Fee Related CA2387418C (en) | 1994-04-13 | 1995-04-03 | Digital vcr with non-standard speed playback |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002387418A Expired - Fee Related CA2387418C (en) | 1994-04-13 | 1995-04-03 | Digital vcr with non-standard speed playback |
Country Status (1)
Country | Link |
---|---|
CA (2) | CA2473171C (en) |
-
1995
- 1995-04-03 CA CA002473171A patent/CA2473171C/en not_active Expired - Fee Related
- 1995-04-03 CA CA002387418A patent/CA2387418C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2473171C (en) | 2005-08-09 |
CA2387418C (en) | 2007-02-06 |
CA2387418A1 (en) | 1995-10-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MY121938A (en) | Digital vcr with non-standard speed playback | |
EP1230795B1 (en) | Eliminating picture format artifacts in mpeg trick modes | |
CA2201707A1 (en) | Digital vcr with hdtv trick play stream derivation | |
CA2153885A1 (en) | Digital video tape recorder for digital hdtv | |
EP0689364A3 (en) | Recording and reproducing digital video signals | |
JP3251321B2 (en) | Recording and playback method of video data | |
US20030081940A1 (en) | Changing a playback speed for video presentation recorded in a modified film format | |
ATE244487T1 (en) | PLAYBACK OF TELEVISION SIGNALS | |
CA2159693A1 (en) | Method for recording and/or reproducing data onto a digital video tape | |
JP3281742B2 (en) | Disc player | |
EP1024671B1 (en) | Video signal recording apparatus | |
CA2387418A1 (en) | Digital vcr with non-standard speed playback | |
MY113786A (en) | Digital vcr with trick play image control | |
KR0124159B1 (en) | Head assembly for digital vcr and trick mode playback method using the same | |
JP3197772B2 (en) | Digital data recording method | |
KR950005250B1 (en) | Digital/analog double use recording & playing method and system | |
KR0185800B1 (en) | Method for recording digital data | |
JP2689981B2 (en) | Playback device | |
Chang et al. | A transparent recording method of ATV data with shuttle mode capability on consumer digital VCR | |
JPH07162799A (en) | Digital video signal recording and reproducing device | |
JP2001069447A (en) | Digital signal recorder and reproducing device | |
KR19980030709A (en) | How to dub tapes from VC | |
TW285737B (en) | ||
JPH06205358A (en) | Recording and reproducing device for muse signal having still picture discrimination information | |
TH22886A (en) | Digital VCR with non-standard playback speed. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |