High speed optical information system and method
US5469269A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1991 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Nov 13, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/783
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high speed optical information search system, comprising a scanning device means for scanning along the vertical lines on the optical magnetic tape, a pick-up device for sensing and accumulating data of the tape and for shift-transmitting and outputting the accumulated data in accordance with a shift clock, a memory circuit for writing and reading digital data information outputted from the pick-up device, a clock for generating clock signals corresponding to a transmission bit speed and to a speed of 5 times of a data transmission bit speed, a reading address counter for counting in accordance with a clock signal corresponding to the data transmission bit speed outputted from the clock during high and normal speed regeneration, a writing address counter for counting according to a clock signal corresponding to predetermined times of the transmission bit speed outputted from the clock during the high speed search, a writing address control circuit for controlling the output signals from the pick-up device to be written in the memory circuit in accordance with the address counted by the writing address counter during a predetermined time span of the frame period under the high spe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.