Camera utilizing variable audio film frame for optical encoding of audio information
US5363157A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Aug 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera system is disclosed that optically records audio information on a photographic film containing corresponding image information. The camera system includes a user interface coupled to a camera control processor, a recording circuit coupled to the camera control processor and a microphone, an optical encoding circuit having an input coupled to the output of the recording circuit and an output coupled to an optical write head, a shutter mechanism, and a transport mechanism for advancing film past the shutter mechanism and the optical write head. In operation, the camera control processor, in response to command signals received from the user interface, controls the operation of the recording circuit, the optical encoding circuit, the optical write head, the shutter mechanism and the transport mechanism, to record audio segments of variable duration and to encode the audio segments as audio film frames of variable lengths adjacent to corresponding picture film frames when the transport mechanism advances film past the optical write head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.