Apparatus for selectively recording analog and digital data on an optical disc
US5195073A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1990 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Dec 7, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8227
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical disc device including an optical disc, a device for selectively processing and recording on the optical disc analog and digital input signals includes analog modulation circuitry for receiving analog input signals and producing modulated analog output signals, block forming circuitry for receiving digital input signals, partitioning the digital input signals into sectors containing sector data, adding error code data to each sector, and producing sector data signals, and digital modulation circuitry for receiving the sector data signals, digitally modulating the sector data signals to suppress low-frequency components, encoding the sector data signals, and producing encoded modulated digital output signals. Selection circuitry receives an external signal indicative of whether the input signals are analog or digital input signals, selects one of the modulated analog output signals and the encoded modulated digital output signals based on the external signal, and produces a selection signal indicating which of the output signals is selected. Recording circuitry receives and amplifies the output signal selected by the selection circuitry, receives the selection signal fr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.