Network karaoke system of broadcast type having supplementary communication channel
US5689081A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | May 1, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/37
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a network karaoke system, a center station transmits song data, and a plurality of karaoke terminals communicate with the center station to receive therefrom the song data so that each karaoke terminal can provide a karaoke service based on the received song data. The center station has a first transmitter that broadcasts the song data to transmit the same simultaneously to all of the karaoke terminals, and a second transmitter that responds to a request from each karaoke terminal to individually transmit the song data to each karaoke terminal. Each karaoke terminal has a first receiver that is capable of receiving the song data broadcasted by the center station, a detector that detects when the first receiver has failed to receive the broadcasted song data for communicating with the center station to notify thereto the request for re-transmission of the song data, and a second receiver that receives the song data re-transmitted from the second transmitter of the center station in response to the request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.