Apparatus for recording and reproducing temporally compressed digital information signal
US5878188A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1994 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Jun 7, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/9265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital information recording-reproducing apparatus is disclosed, in which a signal temporally compressed to 1/n and transmitted is encoded for recording by a recording encoder. The rotation speed of a rotary drum is set at R.sub.1, and the running speed of a magnetic tape at V.sub.1. The signal encoded is recorded on the magnetic tape by magnetic heads. At the time of reproduction, the rotary drum is driven at a speed m/n times faster than for recording, and the magnetic tape is run at a speed 1/n times faster than for recording. The signal reproduced by the magnetic heads is decoded and restored into the original digital information signal by a reproducing decoder. As a result, there is provided a recording-reproducing apparatus having the function of time-base expansion with a reduced recording time applied to a system for transmitting and recording the software information of video or the like through radio wave or cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.