TW201516421A - Testing device and method for testing functions of HDMI thereof - Google Patents

Abstract

The present invention provides a testing device and a method for testing functions of HDMI thereof. The testing device is connected to an electronic product to be tested via a HDMI bus. The HDMI bus includes a CEC line, a first end portion connected to the electronic product, and a second end portion. The testing device includes a patch panel and a processor. The patch panel includes a first switching interface and an input interface. The input interface is connected to the second end portion. The input interface includes CEC pins. The first switching interface is connected to the CEC pins, thereby being connected to the CEC line via the CEC pins. The first switching is further connected to the processor and then configured to lead the CEC line to the processor. The processor detects the voltage level on the CEC line respectively before and after the electronic product receives a CEC signal. When detecting that the voltage level is an alternate high and low voltage level, it indicates that the product has a CEC function.

Description

Test device and high-definition digital multimedia interface function test method

The present invention relates to the field of signal testing, and more particularly to signal testing techniques for high definition digital multimedia interfaces.

Today, HDMI (High-definition Digital Multimedia Interface) is one of the interface technologies widely used to connect digital TVs. The CEC (Consumer Electronic Control) function is an important aspect of HDMI technology, allowing users to simultaneously control multiple electronic devices connected via HDMI to perform the same operation through a remote control.

This type of electronic device is required to test its CEC performance at the factory. The traditional test process requires the electronic device to be tested to be connected to another CEC-enabled external device via HDMI. If the remote device controls the electronic device to be tested and can also control the connected external device to perform the same operation, it indicates that the CEC function of the electronic device to be tested is normal. However, the above test method requires the operator to manually confirm whether the connected external device can be properly controlled, which is not conducive to improving the test efficiency.

In view of the above, it is necessary to provide a test device capable of testing a high-definition digital multimedia interface function, which can implement automatic test of CEC function, thereby solving the above problems.

The present invention provides a test device connected to a product to be tested through an HDMI bus, the HDMI bus including a CEC single line, a first end and a second end, the first end of the HDMI bus and the product to be tested The test device includes an adapter board and a processor, the adapter board includes a first interface and a switch input port, and the switch input port is connected to the second end of the HDMI bus. The first input interface is connected to the CEC pin through the CEC pin, and the first interface is also connected to the processor. And extracting a CEC single line to the processor; the processor is configured to detect a level signal of the CEC single line before and after receiving a CEC command, wherein the processor detects the level signal When the signals are alternately high and low, it indicates that the product to be tested has the CEC function.

The present invention also provides a high-definition digital multimedia interface function test method, which is run in a test device, and the test device is connected to a product to be tested through an HDMI bus, the HDMI bus includes a CEC single line, a first end, and a second end, the first end of the HDMI bus is connected to the product to be tested, the testing device includes an adapter board and a processor, the adapter board includes a first interface and a switch input port, Methods include:

Sending a CEC instruction to the product to be tested;

The processor detects a level signal of the CEC single line before and after receiving the CEC instruction, wherein the adapter input port of the adapter board is connected to the second end of the HDMI bus, and the transfer is performed. The input port includes a CEC pin, and the first interface is connected to the CEC pin, so that the CEC pin is connected to the CEC single line in the HDMI bus, and the first interface is also connected to the processor, and Leading the CEC single wire to the processor;

The processor determines that the product to be tested has a CEC function when detecting that the level signal is an alternating high and low level signal.

Compared with the prior art, the present invention utilizes a processor that connects a product to be tested through a single line of CEC to detect a level signal of a product to be tested on a CEC single line before and after receiving a CEC command, thereby determining whether the product to be tested has a CEC function. The test method is simple and saves manpower.

1‧‧‧Testing device

2‧‧‧HDMI bus

3‧‧‧Tested products

4‧‧‧ display device

5‧‧‧ Data Processing Unit

21‧‧‧ first end

22‧‧‧ second end

23‧‧‧Data line

24‧‧‧CEC single line

100‧‧‧Adapter plate

101‧‧‧ first interface

102‧‧‧Second interface

103‧‧‧Transfer input port

200‧‧‧ processor

300‧‧‧ alarm unit

1031‧‧‧CEC pin

1032‧‧‧Data pin

1 is a functional block diagram of a test apparatus in accordance with a preferred embodiment of the present invention.

2 is a functional block diagram of a test apparatus according to another embodiment of the present invention.

FIG. 3 is a flowchart of a method for testing a high-definition digital multimedia interface function according to a preferred embodiment of the present invention.

1 is a functional block diagram of a test apparatus 1 of the present invention. The test device 1 is connected to a product to be tested 3 through an HDMI bus 2 for testing whether the corresponding operation is performed when the product to be tested 3 receives a CEC command, thereby determining whether the product to be tested 3 has a CEC function. . The product to be tested 3 is connected to a data processing unit 5. In the embodiment, the product to be tested 3 is a DVD player, and the data processing unit 5 is a computer. The data processing unit 5 is connected to the product to be tested 3 via a USB cable (not shown) for generating the CEC command and transmitting a CEC command to the product under test 3 via the USB cable, such as CEC on/off. Command and CEC volume adjustment commands, etc. The HDMI bus 2 includes a first end 21, a second end 22, a data line 23 and a CEC single line 24, wherein the first end 21 of the HDMI bus 2 is connected to the product to be tested 3.

In the present embodiment, the testing device 1 includes an adapter board 100 and a processor 200.

The adapter board 100 includes a first interface 101, a second interface 102, and a transit input 103. The transfer input port 103 is for connecting to the second end 22 of the HDMI bus bar 2. The switch input port 103 includes a CEC pin 1031 and a data pin 1032. The first interface 101 is connected to the CEC pin 1031 so as to be connected to the CEC single line 24 in the HDMI bus 2 through the CEC pin 1031. The first interface 101 is also connected to the processor 200. The CEC single line 24 is taken to the processor 200. The second interface 102 is for connecting to the data pin 1032, and is connected to the data line 23 in the HDMI bus 2 through the data pin 1032. The second interface 102 is also used to connect to a display device 4 to connect the data line 23 to the display device 4. Therefore, the display device 4 receives the audio/video signal on the product 3 to be tested transmitted by the data line 23 and performs display playback. In the present embodiment, the display device 4 is a digital television.

If the product to be tested 3 has the CEC function, the product to be tested 3 will respond to the CEC command and receive a corresponding operation when receiving the CEC command. At this time, the product to be tested 3 will change through the HDMI stream. The level signal outputted by the CEC single line 24 in row 2, that is, before and after the corresponding product 3 performs the corresponding operation according to the CEC instruction, the signal on the CEC single line 24 in the HDMI bus 2 will change and the output alternates. High and low level signals.

The processor 200 is configured to detect a level signal on the CEC single line 24 before and after the CEC instruction is received by the product to be tested. If the processor 200 detects that the level signal is an alternating high and low level signal, it indicates that the product to be tested 3 has a CEC function; otherwise, if the processor 200 detects that the level signal is continuous When the high level signal or the continuous low level signal indicates that the product to be tested 3 does not have the CEC function. In this embodiment, the processor 200 is a central processing unit (CPU) or a microprocessor (Microcontroller).

In the present embodiment, the processor 200 is directly connected to the data processing unit 5. The data processing unit 5 is configured to obtain a detection result of the processor 200 after transmitting the CEC instruction, and then generate a test result according to the acquired detection result, and display the test result, for example, when the processor When the 200 detects that the level signal is an alternating high and low level signal, the data processing unit 5 displays "test normal".

As shown in FIG. 2, in other embodiments, the processor 200 is not connected to the data processing unit 5. In this case, the test apparatus 1 further includes an alarm unit 300 coupled to the processor 200. When detecting that the level signal is an alternating high and low level signal, the processor 200 controls the alarm unit 300 to generate an alarm signal. In the embodiment, the alarm unit 300 is a buzzer, and the processor 200 controls the buzzer to generate a beep when detecting that the level signal is an alternating high and low level signal. In other instant modes, the alarm unit 300 is an LED lamp, and the processor 200 controls the LED lamp to continuously blink when detecting that the level signal is an alternating high and low level signal.

3 is a flow chart showing a method for testing a high-definition digital multimedia interface function in a preferred embodiment of the present invention. The method is applied to the test device 1 described above. The test device 1 is connected to a product to be tested through an HDMI bus 2 . . The HDMI bus 2 includes a first end 21, a second end 22, a data line 23 and a CEC single line 24, wherein the first end 21 of the HDMI bus 2 is connected to the product to be tested 3. The test device 1 includes an adapter board 100 and a processor 200. The adapter board 100 includes a first interface 101 and a switch input 103. The method includes the following steps:

Step S31: The data processing unit 5 sends a CEC command to the product to be tested 3.

Step S32: The processor 200 detects a level signal on the CEC single line 24 before and after the CEC instruction is received by the product under test. The switch input port 103 is connected to the second end 22 of the HDMI bus bar 2. The switch input port 103 includes a CEC pin 1031. The first interface 101 is connected to the CEC pin 1031 so as to be connected to the CEC single line 24 in the HDMI bus 2 through the CEC pin 1031; the first interface 101 is also connected to the processor 200, and The CEC single line 24 is taken to the processor 200.

Step S33: After transmitting the CEC command, the data processing unit 5 acquires the detection result of the processor 200, and then generates a test result according to the acquired detection result, and displays the test result. Wherein, when the processor 200 detects that the level signal is an alternating high and low level signal, the data processing unit 5 displays "test normal".

It is to be understood by those skilled in the art that the above embodiments are only intended to illustrate the invention, and are not intended to limit the invention, as long as it is within the spirit of the invention Changes and modifications are intended to fall within the scope of the invention.

no

1‧‧‧Testing device

2‧‧‧HDMI bus

3‧‧‧Tested products

4‧‧‧ display device

5‧‧‧ Data Processing Unit

21‧‧‧ first end

22‧‧‧ second end

23‧‧‧Data line

24‧‧‧CEC single line

100‧‧‧Adapter plate

101‧‧‧ first interface

102‧‧‧Second interface

103‧‧‧Transfer input port

200‧‧‧ processor

1031‧‧‧CEC pin

1032‧‧‧Data pin

Claims (9)

A test device is connected to a product to be tested through an HDMI bus. The HDMI bus includes a CEC single line, a first end, and a second end. The first end of the HDMI bus is connected to the product to be tested. The improvement device includes an adapter board and a processor, the adapter board includes a first interface and a switch input port, and the switch input port is connected to the second end of the HDMI bus. The transit input port includes a CEC pin, and the first interface is connected to the CEC pin, so that the CEC pin is connected to the CEC single line in the HDMI bus, and the first interface is also connected to the processor. And extracting a CEC single line to the processor; the processor is configured to detect a level signal on the CEC single line before and after receiving a CEC command, wherein the processor detects the level When the signal is an alternating high and low level signal, it indicates that the product to be tested has a CEC function. The test device of claim 1, wherein the adapter board further includes a second interface, the HDMI bus further includes a data line, and the adapter input port of the adapter board further includes a data pin, the second interface is used for connecting to the data pin, so as to be connected to the data line in the HDMI bus through the data pin, the second interface is also used for connecting with a display device And connecting the data line to the display device, so that the audio/video signal on the product to be tested is simultaneously transmitted to the display device through the data line. The test apparatus of claim 1, wherein the processor is a central processing unit or a microprocessor. The test apparatus of claim 1, wherein when the processor detects that the level signal on the CEC single line is a continuous high level signal or a continuous low level signal, it indicates that the waiting is determined. The test product does not have a CEC function. The test apparatus of claim 1, wherein the processor is connected to a data processing unit for transmitting the CEC instruction, and the data processing unit is configured to acquire the processor of the processor after transmitting the CEC instruction. The test result is then generated according to the obtained detection result, and the test result is displayed. The test device of claim 1, wherein the test device further comprises an alarm unit coupled to the processor, the processor further configured to detect that the level signal is alternately high, When the signal is low, the alarm unit is controlled to generate an alarm signal. The test device of claim 6, wherein the alarm unit is a buzzer, and the processor controls the buzzer when detecting that the level signal is an alternating high and low level signal. The device produces a beep. The test device of claim 6, wherein the alarm unit is an LED lamp, and the processor controls the LED continuously when detecting that the level signal is an alternating high and low level signal. flicker. A high-definition digital multimedia interface function test method is run in a test device connected to a product to be tested through an HDMI bus, the HDMI bus including a CEC single line, a first end and a second end The first end of the HDMI bus is connected to the product to be tested. The test device includes an adapter board and a processor. The adapter board includes a first interface and a switch input. The improvement is that the Methods include:
Sending a CEC instruction to the product to be tested;
The processor detects a level signal of the CEC single line before and after receiving the CEC instruction, wherein the adapter input port of the adapter board is connected to the second end of the HDMI bus, and the transfer is performed. The input port includes a CEC pin, and the first interface is connected to the CEC pin, so that the CEC pin is connected to the CEC single line in the HDMI bus, and the first interface is also connected to the processor, and The CEC single line is led out to the processor; and the processor determines that the product to be tested has a CEC function when detecting that the level signal is an alternating high and low level signal.