Descriptor mechanism for assuring indivisible execution of AV/C operations
US6133938A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/775
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for implementing indivisible command execution in an AV/C home audio video network of connected network devices. A network bus operable for conveying commands among a plurality of coupled devices is coupled to each of the devices. A controller device is coupled to the network bus operable for generating a command sequence, the command sequence including a plurality of AV/C commands. A target device is coupled to the network bus, the target device operable for implementing AV/C operations by receiving and executing the command sequence. The target device is configured to identify the command sequence received from the controller via the network bus by reading a group tag field and a command status included in each AV/C command. The group tag field and the command status allow the target device to detect an interruption of the command sequence, such that the target device can avoid a partial execution of the command sequence by ensuring the entire command sequence either completes entirely or fails entirely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.