An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal speed and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatability of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction. Apparatus and method for controlling recording and/or reproduction of digital signals to and/or from a digital storage medium, are discussed. According to an embodiment, the method includes receiving digital data, the digital data including video data compressed as at least one of intra-frame and predictive frame, stuffing data, synchronous signals, and relative position information associated with an i-frame; detecting the synchronous signals for decoding the video data; obtaining the video data from the digital data by removing the stuffing data based on stuffing code information; determining a position associated with the i-frame by using the relative position information; determining whether a speed-varied reproduction mode is selected for reproduction of the video data in a varied speed; and reproducing the video data based on the determined position associated with the i-frame, the synchronous signals, and a result of the step of determining whether the speed-varied reproduction mode is selected.
|
0. 23. A method for processing a digital signal stored on a digital storage medium, the method performed by at least one device and comprising:
receiving digital data,
wherein the digital data includes video data compressed as at least one of intra-frame and predictive frame, stuffing data capable of being detected and removed, synchronous signals, and at least one relative position information associated with an i-frame, wherein the relative position information indicates position information associated with the i-frame relative to position information associated with a current frame;
detecting the synchronous signals for decoding the video data;
obtaining the video data from the digital data by removing the stuffing data based on stuffing code information;
determining a position associated with the i-frame by using the relative position information;
determining whether a speed-varied reproduction mode is selected for reproduction of the video data in a varied speed; and
reproducing the video data based on the determined position associated with the i-frame, the synchronous signals, and a result of the step of determining whether the speed-varied reproduction mode is selected.
0. 1. An apparatus for controlling recording and reproducing in a video cassette tape recorder comprising:
frame extracting means for buffering compressed digital data input thereto, and extracting specific data for a speed-varied reproduction from said compressed digital data;
frame recording position controlling means for calculating a number of tracks for recording the compressed digital data and selectively outputting a buffered output, said extracted specific data from said frame extracting means, and a multiplexing timing signal;
frame position information recording means for recording position information of specific tracks for the speed-varied reproduction and index information on a magnetic tape, based on said multiplexing timing signal;
digital recording means for recording digital signals including said digital data and said index information on said magnetic tape;
digital reproduction means for reproducing the digital signals recorded on the magnetic tape;
frame position information detecting means for detecting said position information of the specific tracks for the speed-varied reproducing and said index information;
tape speed controlling means for controlling the speed of a capstan motor, based on said detected index information and said position information of the specific tracks; and
frame removing means for receiving an output from the digital reproduction means and removing unnecessary bit streams from the specific data.
0. 2. An apparatus in accordance with
an interface for receiving said compressed digital data;
a buffer for buffering an output of said interface for a predetermined period;
a frame detector for detecting said specific data from said output of the interface and outputting a write enable signal; and
a frame memory for selecting and storing the detected specific data, based on said write enable signal.
0. 3. An apparatus in accordance with
0. 4. An apparatus in accordance with
a track number calculator for calculating an average bit rate of said compressed digital data, the size of the specific data, a number of tracks for recording said specific data and a number of tracks present between said specific tracks;
a multiplexing timing generator for receiving an output from said track number calculator and outputting a switching signal for positioning the specific data on said specific tracks in accordance with a head switching signal;
a multiplexer for selecting an output from said frame extracting means, based on an output from said multiplexing timing generator and sending said selected output to said digital recording means; and
a bit stuffing circuit for filling insufficient data with bit streams or dummy bits when said selected output of the frame extracting means is at an underflow state.
0. 5. An apparatus in accordance with
a frame position recorder for receiving an output from said frame recording position controlling means and outputting position discrimination information to said digital recording means so as to record position information of a next specific track on an initial synchronous block of a track having said specific data recorded thereon; and
an index signal recorder for recording position information of said track having said specific data recorded thereon on a control track of said magnetic tape by an index head.
0. 6. An apparatus in accordance with
an index signal detector for detecting index information recorded on a control track of said magnetic tape, said index information indicating whether tracks recorded with said specific data are present;
a recording position-synchronized block detector for detecting an output from said digital reproduction means and detecting recording position-synchronized blocks recorded with codes indicative of relative position information of said tracks recorded with said specific data; and
a recording position decoder for decoding an output of said recording position-synchronized block detector, based on a number of different tape speeds, and thereby outputting a signal for calculating a capstan servo speed.
0. 7. An apparatus in accordance with
a capstan servo speed calculator for calculating a capstan servo speed for repeating a normal speed travel on said specific tracks and a high speed travel on tracks between adjacent specific tracks in a speed-varied reproduction by using the position information of the specific track from said frame position information detecting means based on a number of different tape speeds; and
a capstan servo drive signal generator for controlling driving of said capstan motor, based on an output of said capstan servo speed calculator.
0. 8. An apparatus in accordance with
a deformatter for converting an output of said digital reproduction means to a signal form prior to recording;
a stuffing bit-detecting and removing circuit for outputting a bit removing signal to said deformatter and removing stuffing bits or dummy bits added for preventing generation of an underflow of said frame extracting means in the speed-varied reproduction; and
a frame removal timing generator for receiving said position information of the specific tracks from said frame position information detecting means and outputting a frame removing signal to the deformatter, based on a head switching signal, thereby preventing outputting of said specific data in a normal-speed reproduction.
0. 9. An apparatus in accordance with
0. 10. An apparatus in accordance with
0. 11. An apparatus for controlling recording in a video cassette tape recorder comprising:
frame extracting means for receiving compressed digital data input thereto and extracting specific data for a speed-varied reproduction from said compressed digital data;
frame recording position controlling means for generating a multiplexing timing signal and multiplexing said compressed digital data and said extracted specific data from said frame extracting means based on said multiplexing timing signal;
frame position information recording means for recording index information and position information of specific tracks for recording said specific data for the speed-varied reproduction on a magnetic tape based on said multiplexing timing signal; and
digital recording means for recording digital signals including said digital data and specific data from said frame recording position controlling means on the magnetic tape.
0. 12. An apparatus in accordance with
an interface for receiving said compressed digital data;
a buffer for buffering an output of said interface for a predetermined period;
a frame detector for detecting said specific data from said output of the interface and outputting a write enable signal; and
a frame memory for selecting and storing said specific data based on said write enable signal.
0. 13. An apparatus in accordance with
0. 14. An apparatus in accordance with
a track number calculator for calculating a number of said specific tracks for recording said specific data and a number of tracks present between said specific tracks;
a multiplexing timing generator for generating said multiplexing timing signal based on an output from said track number calculator; and
a multiplexer for selecting an output from said frame extracting means based on said generated multiplexing timing signal.
0. 15. An apparatus in accordance with
0. 16. An apparatus in accordance with
a frame position recorder for receiving an output from said frame recording position controlling means and outputting position discrimination information to said digital recording means so as to record said position information of said specific tracks; and
an index signal recorder for recording said index information on a control track of the magnetic tape, said index information including information indicating whether said specific tracks for said specific data are present.
0. 17. An apparatus in accordance with
0. 18. An apparatus in accordance with
0. 19. A method for controlling recording and reproduction in a video cassette tape recorder, comprising the steps of:
extracting specific data for a speed varied reproduction from compressed digital data;
calculating a number of tracks for recording said digital data and outputting a multiplexing timing signal based on said calculated number of tracks;
recording position information of specific tracks for the speed varied reproduction and index information on a magnetic tape based on said multiplexing timing signal;
recording digital signals including said digital data and said index information on the magnetic tape;
reproducing said digital signals recorded on the magnetic tape;
detecting said position information of the specific tracks for the speed varied reproduction and said index information;
controlling the speed of a capstan motor based on said detected index information and position information of the specific tracks; and
removing unnecessary bit streams from said specific data.
0. 20. A method in accordance with
0. 21. A method of controlling recording in a video cassette tape recorder, comprising the steps of:
extracting specific data for a speed-varied reproduction from compressed digital data;
generating a multiplexing timing signal and multiplexing said compressed digital data and said extracted specific data based on said multiplexing timing signal;
recording index information and position information of specific tracks for recording said specific data for the speed-varied reproduction on a magnetic tape based on said multiplexing timing signal; and
recording digital signals including said multiplexed digital data and specific data on the magnetic tape.
0. 22. A method in accordance with
0. 24. The method of claim 23, wherein the digital data further includes index information indicating that the video data includes an i-frame, and the current frame includes video information and header information.
0. 25. The method of claim 23, wherein the relative position information indicates a position difference between an area associated with the current frame and an area associated with the i-frame.
0. 26. The method of claim 23, wherein the reproducing step reproduces the video data in a varied speed based on speed information when the speed-varied reproduction mode is selected, the speed-varied reproduction mode being associated with the speed information.
0. 27. The method of claim 23, further comprising:
reproducing the video data in a normal speed if the determining step determines that the speed-varied reproduction mode is not selected.
|
VCRto and from a digital storage medium 26 from the storage medium Therefore, the embodiments of the present invention provide an apparatus and method for controlling recording and reproduction of digital data to and from a digital storage medium, which allow a speed-varied reproduction of the digital data in an effective manner using one or more of various information, for example, multiplexing timing information, synchronization information, varied speed information, index information, frame position information, etc.
Accordingly, the present invention provides a repeatability of reproduced video at a varied speed without any deterioration in picture quality in that it enables recording of specific data for speed-varied reproduction on a digital storage medium in an effective manner and continuous detection of the specific data in the speed-varied reproduction from the digital storage medium.
Although the preferred embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. For example, the teachings of the present invention are equally applicable to other suitable digital recording/reproducing devices and digital storage mediums, and are not limited to the examples discussed above.
Yang, Tae Seok, Lee, Je Hyung, Kim, Soo Kyung, Woo, Sang Joon
Patent | Priority | Assignee | Title |
Patent | Priority | Assignee | Title |
3944728, | Sep 29 1972 | Bell & Howell Company | Video information recording and reproduction |
4163993, | Mar 23 1978 | Ampex Corporation | Continuous slow motion automatic tracking system |
4185305, | Mar 04 1974 | BELL & HOWELL COMPANY A DE CORP | Video information recording and reproducing methods and apparatus |
4293880, | Oct 16 1978 | Victor Company of Japan, Ltd. | Apparatus for recording and reproducing video signals at selectable different tape traveling speeds from a plurality of pairs of video heads |
4323930, | Oct 06 1980 | Recortec, Inc. | Slow moving video tape reproduction |
4353129, | Mar 10 1980 | Nippon Electric Co., Ltd. | Digital data transmission system |
4428004, | May 09 1980 | Matsushita Electric Industrial Co., Ltd. | Magnetic tape system for optimally reproducing still and slow motion video pictures |
4568986, | Jul 30 1982 | Hitachi, Ltd. | Variable speed playback controller for a video tape recorder |
4581658, | Jun 04 1982 | Hitachi, Ltd. | Variable speed picture reproducing apparatus for video tape recorder |
4651227, | Aug 20 1982 | Olympus Optical Co., Ltd. | Video signal recording apparatus with A/D conversion |
4663673, | Feb 16 1983 | Sanyo Electric Co., Ltd. | Apparatus for discriminating the recording mode of one of a plurality of recording modes and for reproducing the magnetically recorded video signal |
4761694, | Mar 01 1984 | Victor Company of Japan, Ltd. | Apparatus for recording/reproducing a composite video signal with a rotary recording medium and circuit arrangement therefor |
4802019, | Jan 11 1982 | Picture processing system for selective display | |
4849832, | Apr 03 1986 | Canon Kabushiki Kaisha | Reproducing apparatus with erasing device and erasing function based on frequency multiplexed and/or DPSK coded signal |
4910613, | Oct 01 1984 | Canon Kabushiki Kaisha | Signal reproducing apparatus having means for intermittently moving tape-shaped record bearing medium |
5057949, | Oct 17 1988 | Hitachi, Ltd. | Digital magnetic reproducing apparatus with variable tape speed |
5065258, | Sep 12 1986 | Rank Video Services America; RANK VIDEO SERVICES AMERICA, 720 LANDWEHR RD , NORTHBROOK, IL 60062, A ILLINOIS PARTNERSHIP | Transmitting information from producer to end users through slant-track tape-to-tape copying at higher-than-standard signal transmission |
5070419, | Oct 07 1988 | Sharp Kabushiki Kaisha | Method and apparatus for recording and reproducing of a recording medium |
5097364, | Dec 12 1988 | MITSUBISHI DENKI KABUSHIKI KAISHA, | Magnetic recording and reproducing apparatus and method of recording and reproducing |
5103317, | Apr 25 1988 | Pioneer Electronic Corporation; Pioneer Video Corporation | Apparatus for playing recording medium having a selective special reproduction playback mode |
5122886, | Jun 19 1989 | Pioneer Electronic Corporation | Selective information playback from recording medium based on user input content codes |
5126852, | Apr 27 1990 | Matsushita Electric Industrial Co., Ltd. | Compressed video signal recording/variable-speed reproduction apparatus |
5150210, | Dec 26 1988 | Canon Kabushiki Kaisha | Image signal restoring apparatus |
5157509, | Nov 30 1988 | Canon Kabushiki Kaisha | Information signal recording apparatus performing a cueing function |
5191433, | Mar 24 1989 | Matsushita Electric Industrial Co., Ltd. | Controlling the phase of a frequency-modulated wave so as to be in a predetermined phase relationship with a video signal |
5239418, | Oct 17 1989 | Eastman Kodak Company | Single split frame mode for a fast frame recorder |
5239429, | Feb 21 1989 | Canon Kabushiki Kaisha | Video signal reproducing apparatus |
5247400, | Feb 19 1991 | Sony Corporation | Tape reproducing direction detecting apparatus for a digital VTR |
5251074, | Apr 14 1989 | Hitachi, Ltd. | Method and apparatus for controlling a video signal print system |
5335125, | Nov 01 1991 | Matsushita Electric Industrial Co., Ltd. | Video signal magnetic recording and reproducing apparatus |
5406382, | Apr 06 1990 | Sharp Kabushiki Kaisha | Video signal recordding-reproduction apparatus for wide band video signals |
5428393, | May 24 1991 | Canon Kabushiki Kaisha | Moving image processing method and apparatus |
5438458, | Mar 15 1993 | Sony Corporation | Data reproducing apparatus that detects positional shifts of a control head |
5450209, | Sep 30 1991 | Kabushiki Kaisha Toshiba | Band-compressed signal processing apparatus |
5488409, | Aug 19 1991 | Rovi Guides, Inc | Apparatus and method for tracking the playing of VCR programs |
5504585, | Sep 22 1992 | Sony Corporation | Apparatus and method for providing plural pictures while searching a recording medium whereon a compressed picture signal is recorded |
5507949, | Mar 20 1992 | SPECTRUM LABORATORIES, INC | Supported liquid membrane and separation process employing same |
5535008, | Mar 16 1993 | JVC Kenwood Corporation | Method for jump-reproducing video data of moving picture coded with high efficiency |
5587789, | Apr 16 1993 | Goldstar Co. Ltd. | Apparatus and method for controlling recording and reproduction in digital video cassette tape recorder |
5589993, | Feb 23 1993 | Panasonic Corporation of North America | Digital high definition television video recorder with trick-play features |
5745641, | Jun 05 1990 | U.S. Philips Corporation | Full-motion video disc with reference information for slow-motion or freeze playback |
5907446, | Jan 21 1990 | Sony Corporation | Video tape recorder for recording management data on video tape |
6006007, | Apr 18 1991 | Matsushita Electric Industrial Co., Ltd. | Optical disk apparatus for recording and reproducing compression encoded video signal |
DE3437182, | |||
DE3831277, | |||
DE4037178, | |||
EP461649, | |||
EP505985, | |||
EP513744, | |||
JP4318375, | |||
WO9407332, |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Mar 25 2009 | LG Electronics Inc. | (assignment on the face of the patent) | / |
Date | Maintenance Fee Events |
Feb 02 2012 | ASPN: Payor Number Assigned. |
Date | Maintenance Schedule |
Sep 06 2014 | 4 years fee payment window open |
Mar 06 2015 | 6 months grace period start (w surcharge) |
Sep 06 2015 | patent expiry (for year 4) |
Sep 06 2017 | 2 years to revive unintentionally abandoned end. (for year 4) |
Sep 06 2018 | 8 years fee payment window open |
Mar 06 2019 | 6 months grace period start (w surcharge) |
Sep 06 2019 | patent expiry (for year 8) |
Sep 06 2021 | 2 years to revive unintentionally abandoned end. (for year 8) |
Sep 06 2022 | 12 years fee payment window open |
Mar 06 2023 | 6 months grace period start (w surcharge) |
Sep 06 2023 | patent expiry (for year 12) |
Sep 06 2025 | 2 years to revive unintentionally abandoned end. (for year 12) |