Extended play radio vision cassette recorder system and method of operating same
US6249642A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1997 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | May 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/782
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An extended play radio video cassette recorder (EPRVCR) capable of receiving and recording audio and video signals transmitted over a radio frequency channel is provided. The EPRVCR includes a videocassette recorder (VCR) and a tuner capable of receiving of radio frequency signals and television frequency signals electrically connected to the VCR. Method for broadcasting and receiving a composite video and audio signal over a radio frequency for subsequent recording by an extended play radio video cassette recorder is also provided. The method includes the steps of providing a VCR having a tuner capable of receiving radio frequency signals; broadcasting audio on a preselected baseband radio frequency; broadcasting a visual image on a subcarrier sideband of the preselected baseband frequency; and receiving the audio and visual image using the tuner of the VCR. The VCR is also capable of recording the audio and video image simultaneously onto a single video cassette. The EPRVCR is also capable of playing the audio and visual image through the VCR for display on a monitor. In an embodiment, the tuner is a direct digital frequency synthesis tuner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.