Encoding of audio and digital signals in a video signal
US4875096A · kind A · utility
47Cited by
20References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1989 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Aug 20, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Audio signals and digital commands are encoded into a standard raster format television signal recorded on a casette for play by a home video cassette unit. The audio signals are encoded in the displayable video as modulated carrier pulses separated by return to median intervals with the audio waveforms being tapered near discontinuities. The digital commands are recorded as binary level pulses, one such pulse occupying substantially an entire video line to permit accurate decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.