Baseband video/audio/data transceiver
US5796440A · kind A · utility
Inventors
Key dates
| Filing date | Feb 29, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Feb 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/148
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The BASEBAND VIDEO/AUDIO/DATA TRANSCEIVER invention simultaneously transmits and receives baseband video signals, audio signals, and associated digital data and control signals within a single continuous signal over a single physical transmission line. The device is a single cohesive module, best embodied as an integrated circuit. The audio signals are sampled, and subsequently reconstructed. Audio samples and digital signals are multiplexed, then fed to a multirate elastic buffer. The multiplexed signals are extracted from the elastic buffer coincidentally with the video signal horizontal synchronization pulses and applied to these same pulses, then placed on a channel having a similar transceiver at the other end. The transceiver invention separates the received signals from the transmission line by canceling out its own transmitted signal. The received audio and digital data bursts are culled and reshaped. The video signal horizontal synchronization pulses are simultaneously restored to the received baseband video signal. The culled bursts are fed to a second multirate elastic buffer in synchronism with received video signal horizontal synchronization pulses. The culled multiple…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.