WO2017054655A1

WO2017054655A1 - Hdmi interface test fixture and test method

Info

Publication number: WO2017054655A1
Application number: PCT/CN2016/099299
Authority: WO
Inventors: 孙焕焕; 陈远馨
Original assignee: 深圳市九洲电器有限公司
Priority date: 2015-09-29
Filing date: 2016-09-19
Publication date: 2017-04-06
Also published as: CN105163113B; CN105163113A

Abstract

An HDMI interface test fixture and a test method. An HDMI interface is independent from a television, and parameters of various brands of televisions are respectively written into a television brand parameter unit (200) via a control unit (300), so as to simulate different brands of televisions for testing, so that a plurality of brands of televisions are not needed, the test cost is greatly reduced, it is also not necessary to repeatedly pull out and plug in an HDMI line for replacing a television, and the operation is simple and convenient, which brings great convenience to testing.

Description

HDMI interface test fixture and test method

[0001] The present invention relates to the field of communications, and in particular, to an HDMI interface test fixture and a test method.

Background technique

[0002] With the popularization of high-definition digital television, the HDMI interface (high-definition media interface) with high-definition output capability has become an essential interface for high-definition set-top boxes, and the reliability requirements for HDMI interface design are also increasing.

[0003] Since the HDMI interface of the set top box needs to be connected to a television set, and the television has many brands, there are differences between different brands of television sets. The set-top box may have no output or abnormal output on the HDMI interface of a brand TV. This indicates that the HDMI interface output of the set-top box is incompatible with the brand TV, which will greatly affect the normal use of the set-top box. In order to ensure that the set-top box can be compatible with different brands of TV sets, the current practice is to use HDMI interface compatibility test by using as many brands of TV as possible, but this test method requires multiple TV sets of multiple brands. The cost is high, and it is necessary to repeatedly plug and unplug the HDMI cable to replace the TV, to see if the TV can output normally, and the operation is cumbersome and long, which brings great inconvenience to the test.

technical problem

[0004] In view of this, it is necessary to provide a HDMI interface test fixture and a test method for the above-mentioned HDMI interface test with high cost and cumbersome operation.

Problem solution

Technical solution

[0005] The present invention provides an HDMI interface test fixture, including: an HDMI interface unit, a TV brand parameter unit, and a control unit; the HDMI interface unit is connected to an HDMI interface of the set top box through an HDMI cable, and the control unit is used to The TV brand parameter unit is respectively written into the parameters of each brand TV, and the compatibility test is performed. After the HDMI interface unit is connected with the HDMI interface of the set top box, the set top box reads the TV brand parameter unit by the HDMI interface unit. The entered TV parameters are tested for compatibility. If the HDMI interface of the set-top box is compatible with the brand TV, the set-top box can control the The system sends data and the control unit can receive, if not compatible, the set top box cannot send data, and the control unit cannot receive.

[0006] In one embodiment, the HDMI interface unit includes an HPD pin, a TMDS channel, a D DC channel, and a CEC pin; and the HDMI interface unit is connected to the HDMI interface of the set top box, the HP D pin Sending the HPD signal to the set-top box to inform the set-top box that it has been connected to the HDMI interface test fixture, and the set-top box reads the TV parameter written in the TV brand parameter unit through the DDC channel for compatibility test, and if compatible, the set-top box passes the TMDS channel. Outputting data to the control unit.

[0007] In one embodiment, the HPD signal is sent to the set top box through the GPIO and the gateway; the GPIO is connected to the GPIO at the other end, and the HDMI interface is connected to the set top box at the other end, and the set top box HDMI is switched by the shackle. Interface HPD bow I pin receives the high and low state.

[0008] In one embodiment, the HDMI interface test fixture further includes a test error processing unit; the test error processing unit simulates a test abnormality, and detects whether the HDMI interface test fixture can accurately identify the location and perform processing.

[0009] In one embodiment, the television brand parameter unit uses an E2PROM.

[0010] In one embodiment, the control unit includes a single chip microcomputer and a peripheral circuit; the peripheral circuit includes a cuckoo clock circuit and a reset circuit, and the single chip device programs the E2PROM through two 10-ports, and writes The parameters of different brands of TVs to simulate different brands of TV sets.

[0011] The present invention also provides an HDMI interface test method, including the following steps:

[0012] S10: Separating the HDMI interface of the television, and providing a control unit and a TV brand parameter unit

The control unit is configured to separately write parameters of each brand television to the television brand parameter unit;

[0013] S20: connecting the independent HDMI interface to the HDMI interface of the set top box, and the set top box passes the independent H

The DMI interface reads the TV parameters written in the TV brand parameter unit for compatibility testing;

[0014] S30: If the HDMI interface of the set top box is compatible with the brand television, the set top box can send data to the control unit: and the control unit can receive; if not, the set top box cannot send data, and the control unit cannot receive.

[0015] In one embodiment, the method further includes: simulating a test abnormality, detecting whether the positioning can be accurately identified and processing.

[0016] In one embodiment, the television brand parameter unit uses an E2PROM. [0017] In one embodiment, the control unit includes a single chip microcomputer and a peripheral circuit; the peripheral circuit includes a cuckoo clock circuit and a reset circuit, and the single chip device programs the E2PROM through two 10-ports, and writes The parameters of different brands of TVs to simulate different brands of TV sets.

Advantageous effects of the invention

Beneficial effect

[0018] The HDMI interface test fixture and method of the present invention separates the HDMI interface of the television, and writes the parameters of each brand television to the brand parameter unit of the television through the control unit to simulate different brands of televisions for testing. Therefore, multiple brands of TVs are not required, the test cost is greatly reduced, and the HDMI cable is not required to be repeatedly inserted and replaced to replace the TV set, and the operation is simple and convenient, which brings great convenience to the test.

Brief description of the drawing

DRAWINGS

1 is a structural diagram of an HDMI interface test fixture in an embodiment;

2 is a flow chart of a HDMI interface test method in an embodiment.

Embodiments of the invention

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 is a structural diagram of an HDMI interface test fixture in an embodiment. As shown in FIG. 1, the test fixture includes: an HDMI interface unit 100, a TV brand (or model) parameter unit 200, and a control unit 300. The HDMI interface unit 100 is connected to the HDMI interface of the set top box through an HDMI cable. The control unit 300 is configured to separately write parameters of each brand television to the television brand parameter unit 200 for compatibility testing. After the HDMI interface unit 100 is connected to the HDMI interface of the set top box, the set top box reads the TV parameters written in the TV brand parameter unit 200 through the HDMI interface unit 100 for compatibility testing. If the HDMI interface of the set top box is compatible with the brand television, Then the set top box can send data to the control unit 300 and the control unit 300 can receive, if not compatible, the set top box cannot send data, and the control unit 300 Unable to receive. In this way, by independently outputting the HDMI interface unit 100 and writing the parameters of each brand television to the TV brand parameter unit 200 through the control unit 300, the televisions of different brands are simulated for testing, thereby eliminating the need for multiple brands of televisions. The machine greatly reduces the test cost, and does not need to repeatedly plug and unplug the HDMI cable to replace the TV. The operation is simple and convenient, which brings great convenience to the test.

[0023] In this embodiment, the HDMI interface unit 100 includes an HPD (Hot Plug Detect) pin, a TMDS (Minimized Transmit Differential Signal) channel, a DDC (Direct Digital Control) channel, and a CEC (Consumer Electronic Control) reference. foot. The HDMI interface unit 100 is connected to the HDMI interface of the set top box, and the HPD pin sends an H PD signal to the set top box to inform the set top box that it has been connected to the HDMI interface test fixture. The TV set parameters written in the TV brand parameter unit 200 are read by the set top box through the DD C channel for compatibility testing. If compatible, the set top box outputs data to the control unit 300 through the TMDS channel.

[0024] Since the HPD pin (or CEC pin) of the HDMI interface (both the set top box and the test fixture) controls the transmission of the HPD signal by the received high and low state, the HPD signal is sent to the set top box through the GPIO ( General purpose input / output) and 幵 off to achieve. One end of the switch is connected to the GPIO, and the other end is used to connect to the HDMI port of the set-top box, and the high-low state received by the HPD pin of the set-top box HDMI interface is switched by the switch. For example, if the switch is pressed, the HPD pin on the set-top box receives a high level to generate an HPD signal, which is equivalent to the state in which the HDMI cable is plugged into the set-top box. If the switch is not pressed, the HPD pin receives a low level and does not generate an HPD signal. In the state where the HDMI cable is not inserted into the set-top box, the hot plugging can be simulated by continuously switching the switch, and the CEC function is the same.

[0025] In the same way, in the traditional test, there may be problems with the set-top box or some defects in the TV set, causing the set-top box to communicate with the TV set abnormally. Incompatibility test results occur. Common HDMI abnormal conditions are available. : The short circuit of the TMDS channel and the DDC channel causes the TV to have no picture output or the color of the output picture is distorted, and the standby does not come up; the parameters of the TV are not correct for the set-top box that is not in accordance with the standard specifications, and thus the test result is erroneous. In the event of these abnormalities, in order to quickly locate and solve the HDMI interface test fixture, the HDMI interface test fixture also includes a test error processing unit. The test error processing unit simulates abnormal conditions such as channel short circuit, circuit, and TV parameter error, and detects whether the H DMI interface test fixture can accurately identify the positioning and perform processing. In this way, by testing the error processing unit, simulating various test abnormalities that may occur, and detecting whether the HDMI interface test fixture can be accurately identified, And give accurate test results to avoid abnormal conditions affecting test results.

The television brand parameter unit 200 employs E2PROM (Electrically Erasable Read Only Memory), which stores the parameters of each brand television set written by the control unit 300.

[0027] The control unit 300 includes a single chip microcomputer and peripheral circuits. The peripheral circuit includes a cuckoo clock circuit and a reset circuit to ensure that the MCU works normally. The MCU uses two 10-ports to program the E2PROM and write the parameters of different brands of TVs to simulate different brands of TVs. In this way, you don't need to find a different brand of TV to test. You only need to program the E2PROM through the MCU to simulate the use of TVs of different brands, which greatly saves the cost and is easy and convenient to operate.

[0028] The HDMI interface test fixture separates the television HDMI interface 100, and writes parameters of each brand television to the television brand parameter unit 200 through the control unit 30 to simulate different brands of televisions for testing. Therefore, it does not need multiple brands of TV sets, which greatly reduces the test cost, and does not need to repeatedly plug and unplug the HDMI cable to replace the TV set. The operation is simple and convenient, which brings great convenience to the test.

[0029] In the meantime, the present invention further provides an HDMI interface testing method. As shown in FIG. 2, the method includes the following steps:

[0030] S10: Separating the HDMI interface of the television and providing a control unit and a TV brand parameter unit

The control unit is configured to separately write parameters of each brand television to the TV brand parameter unit.

[0031] S20: connecting the independent HDMI interface to the HDMI interface of the set top box, and the set top box passes the independent H

The DMI interface reads the TV parameters written in the TV brand parameter unit for compatibility testing.

[0032] S30: If the HDMI interface of the set top box is compatible with the brand television, the set top box can send data to the control unit: and the control unit can receive; if not, the set top box cannot send data, and the control unit cannot receive.

[0033] In this way, by independently outputting the HDMI interface, and writing the parameters of each brand television to the TV brand parameter unit through the control unit, the televisions of different brands are simulated for testing, thereby eliminating the need for multiple brands of televisions. , greatly reducing the cost of testing, and does not need to repeatedly plug and unplug the HDMI cable to replace the TV, the operation is simple and convenient, bringing great convenience to the test.

[0034] Further, in the traditional test, there may be problems in the set-top box or some defects in the TV set, causing the set-top box to communicate with the TV set abnormally, and incompatible test results occur, common HD The MI abnormalities are as follows: The short circuit of the TMDS channel and the DDC channel causes the TV to have no picture output or the output picture color is distorted, and the standby does not come up; the parameters of the TV set do not cause the wrong detection of the set-top box due to the failure of the standard specification, and thus produce an erroneous test result and the like. In the event of these abnormal conditions, in order to enable the HDMI interface test fixture to be quickly located and solved, the HDMI interface test method further includes the steps of: analog channel short circuit, circuit, TV parameter error and other test abnormal conditions, whether the detection is accurate Identify and handle the location. In this way, simulate various test abnormalities that may occur, detect whether the test method can be accurately identified, and give accurate test results to avoid abnormal conditions affecting test results.

[0035] The TV brand parameter unit uses E2PROM (Electrically Erasable Read Only Memory), and the E2PROM stores the parameters of each brand TV set written by the control unit.

[0036] The control unit includes a single chip microcomputer and peripheral circuits. The peripheral circuit includes a cuckoo clock circuit and a reset circuit to ensure the normal operation of the microcontroller. The MCU uses two 10-ports to program the E2PROM and write the parameters of different brands of TVs to simulate different brands of TVs. In this way, you don't need to find a different brand of TV to test. You only need to program the E2PROM through the MCU to simulate the use of TVs of different brands, which greatly saves the cost and is easy and convenient to operate.

[0037] The HDMI interface test method separates the TV HDMI interface, and writes parameters of each brand TV to the TV brand parameter unit through the control unit to simulate different brands of televisions for testing, thereby eliminating the need for Multiple brands of TVs greatly reduce the cost of testing, and do not need to repeatedly plug and unplug the HDMI cable to replace the TV. The operation is simple and convenient, which brings great convenience to the test.

[0038] The HDMI interface test fixture and method of the present invention separates the HDMI interface of the television, and writes the parameters of each brand television to the brand parameter unit of the television through the control unit to simulate different brands of televisions for testing. Therefore, multiple brands of TVs are not required, the test cost is greatly reduced, and the HDMI cable is not required to be repeatedly inserted and replaced to replace the TV set, and the operation is simple and convenient, which brings great convenience to the test.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the present invention. Within the scope of protection.

Claims

Claim

[Claim 1] An HDMI interface test fixture, comprising: an HDMI interface unit, a TV brand parameter unit, and a control unit; the HDMI interface unit is connected to an HDMI interface of the set top box through an HDMI cable, and the control unit is shown It is used to separately write parameters of each brand television to the TV brand parameter unit, and perform compatibility test. After the HDMI interface unit is connected with the HDMI interface of the set top box, the set top box reads the TV brand parameter through the HDMI interface unit. The TV parameters written in the unit are tested for compatibility. If the HDMI interface of the set-top box is compatible with the brand TV, the set-top box can send data to the control unit and the control unit can receive. If not, the set-top box cannot send data. The control unit cannot receive.

[Claim 2] The HDMI interface test fixture according to claim 1, wherein the HDMI interface unit comprises an HPD pin, a TMDS channel, a DDC channel, and a CEC bow; in the H DMI interface unit and the set top box After the HDMI interface is connected, the HPD bow sends the HPD signal to the set-top box to inform the set-top box that the set-top box has been connected to the HDMI interface test fixture, and the set-top box reads the TV parameter written in the TV brand parameter unit through the DDC channel for compatibility test. If compatible, the set top box outputs data to the control unit through the TMDS channel.

[Claim 3] The HDMI interface test fixture according to claim 2, wherein the HPD signal is sent to the set top box through the GPIO and the switch; the switch is connected to the GPIO at one end, and the HDMI is connected to the set top box at the other end. The interface switches the high and low state received by the HPD pin of the HDMI interface of the set-top box by closing.

[Claim 4] The HDMI interface test fixture according to claim 1, wherein the HDMI interface test fixture further includes a test error processing unit; the test error processing unit simulates an abnormal test condition, and detects an HDMI interface test fixture. Can you accurately identify and carry out the location?

[Claim 5] The HDMI interface test fixture according to claim 1, wherein the TV brand parameter unit uses an E2PROM.

[Claim 6] The HDMI interface test fixture according to claim 5, wherein the control The unit includes a single chip microcomputer and a peripheral circuit; the peripheral circuit includes a chirp circuit and a reset circuit

The MCU programs the E2PROM through two 10-ports, and writes parameters of different brand TVs to simulate different brands of TV sets.

[Claim 7] A method for testing an HDMI interface, comprising the steps of:

S10: Separating the HDMI interface of the television, and providing a control unit and a TV brand parameter unit, wherein the control unit is configured to separately write parameters of each brand television to the TV brand parameter unit;

S20: Connect the independent HDMI interface to the HDMI interface of the set-top box, and the set-top box reads the TV parameters written in the TV brand parameter unit through the independent HDMI interface for compatibility test;

S30: If the HDMI interface of the set-top box is compatible with the brand TV, the set-top box can send data to the control unit: and the control unit can receive it; if it is not compatible, the set-top box cannot send data, and the control unit cannot receive.

[Claim 8] The HDMI interface testing method according to claim 7, wherein the method further comprises: simulating a test abnormality, detecting whether the positioning can be accurately identified and performing processing.

[Claim 9] The HDMI interface test method according to claim 7, wherein the TV brand parameter unit uses an E2PROM.

[Claim 10] The HDMI interface testing method according to claim 9, wherein the control unit comprises a single chip microcomputer and a peripheral circuit; the peripheral circuit comprises a cuckoo clock circuit and a reset circuit, and the single chip microcomputer passes two 10 The E2PROM is programmed to program the parameters of different brands of TVs to simulate different brands of TV sets.