Apparatus and method for synthesizing information signal and reproduction control signal and information signal recording apparatus
US5982977A · kind A · utility
44Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1996 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Nov 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91371
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A synthesis signal which was reproduced from reproducing apparatus and converted into an analog signal includes an analog information signal and a copy control code. The copy control code is modulated by a spread spectrum. A code reading unit of the recording apparatus extracts the copy control code by an inverse spread spectrum. A code changing unit changes the copy control code by a spread spectrum as necessary. An output signal of the code changing unit is converted into a digital signal. The digital signal is subjected to processes necessary for recording and is recorded to a recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.