Apparatus and method for recording or reproducing digital data using speed information
USRE41611E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | May 11, 2007 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | May 11, 2027 |
Classification
- Technology area (CPC —)General
Abstract
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 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 of travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatibility 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 reproduct…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.