Apparatus and method for testing signal channels of digital video recorder

• US 8,428,424 B2
• Filed: 11/26/2010
• Issued: 04/23/2013
• Est. Priority Date: 11/01/2010
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Hsu, Ming-Yuan
• Primary Examiner(s): Shibru, Helen
• Application Number:
  US12/954,692
• Publication Number:
  US 20120106928A1
• Time in Patent Office: 879 Days
• Field of Search: 386/231, 386/230, 386/239, 386/326, 725/80, 725/81, 725/115, 725/74
• US Class Current: 386/231
• CPC Class Codes: H04N 17/06 for recorders
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

A channel test unit of a digital video recorder (DVR) includes a command generation module generating a selection signal to a controller. The controller outputs control signals to a multiplexer to select an output terminal of the multiplexer to switch to a signal channel. A signal generation module obtains a format voice data and converts to an analog voice signal and sends to the multiplexer. The multiplexer sends the analog voice signal to the selected signal channel after the signal channel is selected. A voice detection module defines an identification (ID) number for each of the signal channels in sequence and detects whether the DVR receives an analog voice signal, and determines whether all of the signal channels have been tested. A display module displays an ID number of the selected signal channel on a display device when the DVR does not receive the analog voice signal.

Claims

1. A digital video recorder (DVR), being connected with a controller and a multiplexer, the DVR comprising:

a processor;

a command output interface;

a signal output interface;

a storage unit to store different voice data formats; and

a channel test unit stored in the storage unit and being executable by the processor, the channel test unit comprising;

a command generation module to generate a selection signal and send the selection signal to the controller through the command output interface, the controller to output control signals to address input terminals of the multiplexer according to the selection signal, to select an output terminal of the multiplexer to switch to a signal channel to be tested from the signal channels;

a signal generation module to obtain a format voice data from the storage unit and convert the voice data to an analog voice signal, and send the analog voice signal to the input terminal of the multiplexer through the signal output interface, the multiplexer to send the analog voice signal to the selected signal channel after the signal channel is selected;

a voice detection module to define an identification (ID) number for each of the signal channels of the DVR in sequence, and detect whether the DVR receives an analog voice signal from the selected signal channel, and determine whether all of the signal channels have been tested according to the ID numbers; and

a display module to display an ID number of the selected signal channel on a display device when the DVR does not receive the analog voice signal from the selected signal channel.

2. The DVR according to claim 1, wherein the signal output interface is an Electronic Industry Association recommended standard-232 (EIA-RS-232) interface.

3. The DVR according to claim 1, wherein the command output interface is a universal serial bus (USB) interface.

4. The DVR according to claim 1, wherein the storage unit stores the voice data having a wave audio files (WAV) format or a windows media audio (WMA) format.

5. A method for testing signal channels of a digital video recorder (DVR), the method comprising:

defining an identification (ID) number for each of the signal channels of the DVR in sequence;

obtaining a formatformat voice data from a storage unit, and converting the voice data to an analog voice signal, and outputting the analog voice signal to input terminals of a multiplexer through a signal output interface of the DVR;

generating a selection signal and sending the selection signal to a controller through a command output interface of the DVR;

outputting control signals to address input terminals of the multiplexer according to the selection signal and selecting an output terminal of the multiplexer to switch to a signal channel to be tested from the signal channels according to the control signals, and sending the received analog voice signal to the selected signal channel after the signal channel is selected;

detecting whether the DVR receives the analog voice signal from the selected signal channel;

displaying the ID number of the selected signal channel on the display device in responding to not receiving the analog voice signal from the selected signal channel;

determining whether all of the signal channels have been tested by the format voice data according to the ID numbers in responding to the DVR receives the analog voice signal from the selected signal channel, and returning to “

generating a selection signal and sending the selection signal to a controller through a command output interface of the DVR”

in responding to any signal channel has not been tested by the format voice data; and

determining whether all of the signal channels have been tested by all of the format voice data stored in the storage unit in responding to all of the signal channels have been tested by the format voice data, and returning to “

obtaining a format voice data from a storage unit, and converting the voice data to an analog voice signal, and outputting the analog voice signal to input terminals of a multiplexer through a signal output interface of the DVR”

in responding to any signal channel has not been tested by all of the format voice data, the flow ending in responding to all of the signal channels have been tested by all of the format voice data.

6. The method according to claim 5, wherein the signal output interface is an Electronic Industry Association recommended standard-232 (EIA-RS-232) interface.

7. The method according to claim 5, wherein the command output interface is a universal serial bus (USB) interface.

8. The method according to claim 5, wherein the storage unit stores the voice data having a wave audio files (WAV) format or a windows media audio (WMA) format.