Transmitting common mode control data over audio return channel
US10931722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2017 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Jun 15, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/439
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A source device and a sink device may be connected using an interface cable comprising at least first and second physical channels. The first physical channel may be used to transmit video data unidirectionally from the source device to the sink device. In addition, the second physical channel may comprise an audio return channel wherein audio data can be transmitted unidirectionally from the sink device to the source device at a first rate. In addition, the second physical channel may also transmit bidirectional control data between the source and sink devices at a second rate slower than the first rate. The audio data may be overlaid on the control data, wherein the audio data is transmitted using differential signaling, while the control data is transmitted using common mode signaling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.