Information signal reproduction control system
US6023551A · kind A · utility
18Cited by
3References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 12, 1997 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Nov 12, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/9135
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A synthetic information signal generated by superimposing one spreading code selected out of predetermined plural spectrum spreading codes different in a phase or a code series on a main information signal is output according to a reproduction control signal for controlling the prohibition and the allowance of recording the above main information signal on a recording medium, a reproduction control signal according to the result of detecting the spreading code in the synthetic signal is generated and the main information signal is recorded on the recording medium according to the reproduction control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.