Remote control video modulator

摘要

A video modulator is presented. The modulator includes a video input interface, a video modulation circuit, a video output interface, a communication interface, and control circuitry. The video input interface is configured to receive a video signal to be modulated, the video modulation circuit is configured to modulate the video signal, and the video output interface is configured to transmit the modulated video signal. The communication interface is configured to receive a command via a communication link to control the video modulator. The control circuitry is configured to receive the command from the communication interface and to control at least one of the video input interface, the video modulation circuit, and the video output interface based on the command.

主权项

1. A video modulator, comprising:
a video input interface configured to receive from a discrete output device a video signal to be modulated; a video modulation circuit configured to modulate the video signal; a video output interface configured to transmit the modulated video signal; a communication interface configured to:
receive one of first command and a second command via a communication link to control the video modulator,communicate a status obtained from at least one of the video input interface, the video modulation circuit, and the video output interface to a communication node that is concurrently controlling a plurality of like video modulators of a network that are each configured to receive the video signal; and control circuitry configured to:
obtain the status that indicates operating status of at least one of the video input interface, the video modulation circuit, and the video output interface, andreceive the first command and the second command from the communication interface and to control at least one of the video input interface, the video modulation circuit, and the video output interface based on the received first command and the second command, wherein the second command received from the communication node comprises an indication that the video modulator is to be disabled so that the transmission of the modulated video signal ends, and wherein a selected one of the plurality of other like video modulators is enabled to provide the modulated video signal to an external device that was previously receiving the modulated video signal from the video modulator.