Optical disk apparatus for selectively recording and reproducing signals having different bit rates
US5379120A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1993 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | May 24, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/9261
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical apparatus digitizes a first signal, reproduce or records and reproduce the digital information compressed in a band up to a specified bit rate A1 at a specified rotating speed K or specified linear velocity V, digitizes a second signal, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A2 at a rotating speed of about K.times.A2/A1, or a linear velocity of about V.times.A2/A1, and thereby reproduce or records and reproduces information of plural signals, or reproduces or records and reproduces information of plural compression rates by using only one apparatus. It also digitizes a first signal, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A1 in n optical channels, digitizes a second piece of information, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A2 in about n.times.A2/A1 optical channels, and thereby reproduces or records and reproduces information of plural signals, or reproduces or records and reproduces information of plural compression rates using only one apparatus without notably…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.