Descriptor mechanism for assuring indivisible execution of AV/C

Details Descriptor mechanism for assuring indivisible execution of AV/C Descriptor mechanism for assuring indivisible execution of AV/C

1999-03-11

2000-10-17

Flynn, Nathan

Television

Special applications

Manufacturing

709210, 709217, H04N 710, G06F 1516

Patent

active

061339385

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.

REFERENCES:
patent: 5367695 (1994-11-01), Narad et al.
patent: 5659539 (1997-08-01), Porter et al.
patent: 5802017 (1998-09-01), Sato et al.
patent: 5878216 (1999-03-01), Young et al.
patent: 5973722 (1999-10-01), Wakai et al.

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