Patent ID: 8374483
Filing Date: 2013-02-12
Classification: G11B,H04N

Abstract:
1. A digital video recorder (DVR), being connected with a controller and an image distributor, the DVR comprising: at least one processor; a storage device for storing image data; and a channel test unit stored in the storage device and being executable by the at least one processor, the channel test unit comprising: a command generation module operable to generate a selection command, and send the selection command to the controller for controlling the image distributor to select a signal channel to be tested from a plurality of signal channels of the DVR, wherein the image distributor comprises a first input port, a second input port, and a plurality of output ports, the first input port is switched to each of the output ports that connects to the selected signal channel, and the controller controls the image distributor through the second input port; a signal generation module operable to obtain the image data from the storage device, convert the image data to a video signal, and send the video signal to the selected signal channel through the image distributor; and a display module operable to display an ID number of the selected signal channel on a display device when the DVR does not receive the video signal from the selected signal channel.