Communication system for encrypted data and apparatus for selectively recording and reproducing received analog signal and received digital signal
US6363210B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A communication system has an analog signal broadcasting station for transmitting an analog signal, a digital signal broadcasting station for transmitting a digital signal and a receiving unit for receiving the analog signal from the analog signal broadcasting station and the digital signal from the digital signal broadcasting station. The receiving unit has a recording and reproducing unit for selectively recording one of received analog and digital signals. The recording and reproducing unit has heads for analog signal each having a predetermined azimuth angle and operative to record an analog signal and heads for digital signal each having an azimuth angle larger than that of the analog signal head and operative to record a digital signal, and performs selective recording and reproduction of the analog signal and the digital signal on and from a recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.