WO2017193772A1

WO2017193772A1 - System and method for automatically testing performance of dtmb

Info

Publication number: WO2017193772A1
Application number: PCT/CN2017/080926
Authority: WO
Inventors: 李刚; 牛进; 戎世杰
Original assignee: 晶晨半导体(上海)有限公司
Priority date: 2016-05-11
Filing date: 2017-04-18
Publication date: 2017-11-16
Also published as: CN105933701A

Abstract

The present invention relates to the technical field of computers, in particular a system and method for automatically testing the performance of a DTMB. The method comprising: by arranging a control processing device in bidirectional communication with a test device and a tested device, respectively, and comparing a pre-set error code variation value with a real-time error variation value of audio and video data output by an adjusted test device and broadcast by the tested device; and according to the comparing result, outputting a test result of the performance of the DTMB. Thus, the problems of small mosaic omissions and not being able to test without stopping in 24 hours caused by manual observation for images are avoided; and the present invention has a stable and reliable test result, with each test mistake being less than 0.1 dB, and the test efficiency is improved significantly.

Description

System and method for automatically testing DTMB performance

Technical field

The present invention relates to the field of DTMB technology, and in particular, to a system and method for automatically testing DTMB performance.

Background technique

At present, in the process of testing the performance of DTMB (Digital Television Terrestrial Multimedia Broadcasting), the quality of DTMB images is mainly determined by human eyes, and when mosaics are found or cannot be locked, they are generally manually Modify the channel condition and observe the image again until the image is modified and the image is not displayed for 1 to 2 minutes.

However, human eye observation is not only easy to cause image omissions, such as small mosaics are not easily found by the human eye, and manual viewing of video can not be long-term (such as 24 hours) non-stop testing, which will cause the current DTMB The test results are unstable and the test efficiency is low, which in turn seriously affects the verification progress of DTMB products, which are unwilling to be seen by those skilled in the art.

Summary of the invention

In view of the above problems, the present invention discloses a system for automatically testing DTMB performance, including:

A test device connected to the DTMB [also referred to as a DTMB transmission test device (for example, a single family unit, SFU for short)];

a device under test (DUT) connected to the test device to receive and play audio and video data of the DTMB broadcast through the test device;

Controlling processing devices, respectively, in two-way communication connection with the test device and the device under test;

The control processing device includes a data storage unit and a determining unit, and the data storage unit stores a plurality of operating parameters and a preset error (Packet Error Rate (PER) change value);

The control processing device adjusts operation of the test device by retrieving and transmitting the operating parameter to the test device;

The determining unit acquires a real-time error change value of the audio and video data output by the tested device by the measured device, and the determining unit retrieves and compares the preset error code according to the preset error value The real-time error change value is compared. If the real-time error change value is smaller than the preset error change value, the control processing device adjusts the operation of the test device by adjusting the operation parameter.

The system for automatically testing the performance of the DTMB, wherein the preset error change value is an error value of the first time when the audio and video data output by the tested device is played by the device under test. .

The above system for automatically testing DTMB performance, wherein the preset error change value is greater than one.

The above system for automatically testing DTMB performance, wherein if the real-time error is changed If the value is greater than or equal to the preset error change value, the test result that the control parameter is last retrieved is the test result of the DTMB performance.

The above system for automatically testing DTMB performance, wherein the device under test is connected to the test device via an audio and video cable.

The above system for automatically testing DTMB performance, wherein the control processing device is a computer.

The above described system for automatically testing DTMB performance, wherein the test device is connected to the computer via a network interface.

The above system for automatically testing DTMB performance, wherein the device under test is connected to the computer through a serial port.

The above system for automatically testing DTMB performance, wherein the error change value is a register change value.

The present invention also discloses a method for automatically testing DTMB performance, including the above system for automatically testing DTMB performance, the method comprising:

Receiving and playing the audio and video data of the DTMB broadcast by the device under test through the test device;

The determining unit acquires a real-time error change value of the audio and video data output by the tested device by using the adjusted test device, and retrieves the real-time error code according to the preset error change value. The change value is compared. If the real-time error change value is smaller than the preset error change value, the control processing device adjusts by adjusting the operation parameter. The operation of the test device; if the real-time error change value is greater than or equal to the preset error change value, outputting the last run of the control processing device to the DTMB performance test result.

The above invention has the following advantages or advantageous effects:

The invention discloses a system and a method for automatically testing the performance of a DTMB, by setting a control processing device which is respectively connected with a test device and a device under test in two-way communication, to play the adjusted device on the device under test according to a preset error value. The real-time error value of the audio and video data outputted by the test device is compared, and the test result of the DTMB performance is output according to the comparison result; thereby avoiding the problem of small mosaic omission caused by manual observation of the image and the inability to test 24 hours a day, Moreover, the test result of the invention is stable and reliable, and the test error is less than 0.1 dB each time, which greatly improves the test efficiency.

DRAWINGS

The invention and its features, aspects and advantages will become more apparent from the detailed description of the accompanying drawings. The same reference numerals are used throughout the drawings to refer to the same parts. The drawings are not drawn to scale and the emphasis is on the subject matter of the invention.

1 is a schematic structural diagram of a system for automatically testing DTMB performance in an embodiment of the present invention;

2 is a flow chart of a method for automatically testing DTMB performance in an embodiment of the present invention.

detailed description

The invention is further illustrated by the following figures and specific examples, but is not to be construed as limiting.

Embodiment 1:

As shown in FIG. 1, the present invention discloses a system for automatically testing the performance of a DTMB. Specifically, the system includes: a test device (also referred to as a DTMB transmission test device) connected to the DTMB, and connected to the test device, a device under test that receives and plays audio and video data of the DTMB broadcast through the test device, and a control processing device that is bidirectionally communicatively coupled to the test device and the device under test; wherein the control processing device includes a data storage unit and a determination unit, and the data storage The unit stores a plurality of operating parameters and preset error change values; and the control processing device adjusts the operation of the test device by retrieving and transmitting the operating parameters to the test device; the determining unit acquires the tested device by playing the tested device. The real-time error value of the output audio and video data changes, and the judging unit retrieves and compares the real-time error change value according to the preset error change value, and if the real-time error change value is smaller than the preset error change value, The control processing device adjusts the operation of the test device by adjusting the operating parameters.

In a preferred embodiment of the present invention, the preset error change value is an error change value when the audio and video data output by the tested device is played by the device under test for the first time when the mosaic occurs.

In a preferred embodiment of the invention, the preset error change value is greater than one.

In a preferred embodiment of the present invention, if the real-time error change value is greater than or equal to the preset error change value, the output control parameter that is output by the control processing device is the test result of the DTMB performance.

In a preferred embodiment of the present invention, the device under test is tested by an audio and video cable connection. device.

In a preferred embodiment of the invention, the control processing device is a computer.

In a preferred embodiment of the invention, the test device is coupled to the computer via a network interface.

In a preferred embodiment of the invention, the device under test is connected to the computer via a serial port.

In a preferred embodiment of the invention, the error change value is a register change value.

Specifically, in the embodiment of the present invention, the control processing device is a computer, and the specific purposes include: first, verifying that the SCPI (Standard Commands for Programmable Instruments) syntax format of the control test device is correct; and second, providing a dynamic of controlling the test device. Link library, which is used by automated testing software. In the embodiment of the present invention, the error code is a main flag for judging whether each test index passes, and the error rate is actually a register value, and the amplitude of the error directly causes a mosaic to appear. The judging unit in the control processing device reads the register value in real time. If the value changes little (phase difference: 0 to 1), the mosaic does not generally appear on the play screen, indicating that the current running parameter satisfies the test index, and the control processing device continues. Automatically adjust the operating parameters (that is, adjust and send different operating parameters to the test equipment to adjust the operation of the test equipment), and then obtain the error value until the error value changes greatly. At this time, the human eye sees a mosaic. Then the last adjustment value of the current running parameter is the performance limit, and the last running parameter is the final DTMB performance test result.

The invention adopts a UI user interface, provides a human-computer interaction environment, acquires a project of a specified test for testing, and the final test result is recorded in a log file.

Embodiment 2:

As shown in FIG. 2, the embodiment relates to a method for automatically testing DTMB performance, which includes the above system for automatically testing DTMB performance. Specifically, the method includes:

Step S1, the device under test receives and plays the audio and video data of the DTMB broadcast through the test device;

Step S2, the control processing device adjusts the operation of the test device by calling and sending the operation parameter to the test device;

Step S3: The determining unit acquires a real-time error change value of the audio and video data output by the tested device by playing the adjusted test device, and retrieves and compares the real-time error change value according to the preset error change value, if If the real-time error change value is smaller than the preset error change value, the control processing device adjusts the operation of the test device by adjusting the operation parameter (ie, the control processing device re-sends another operation parameter from the data storage unit to the test device), that is, Returning to step S2; if the real-time error change value is greater than or equal to the preset error change value, the output control parameter that the control processing device last retrieved is the test result of the DTMB performance.

It is not difficult to find that this embodiment is an embodiment of the method corresponding to the above embodiment of the system for automatically testing DTMB performance. This embodiment can be implemented in cooperation with the above-described embodiment of the system for automatically testing DTMB performance. The related technical details mentioned in the above embodiments of the system for automatically testing DTMB performance are still effective in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related art details mentioned in this embodiment can also be applied to the above-described embodiment of the system for automatically testing DTMB performance.

In summary, the present invention discloses a system and method for automatically testing the performance of a DTMB, by setting a control processing device that is bidirectionally connected to the test device and the device under test, The real-time error value of the audio and video data output by the device under test is compared according to the preset error change value, and the test result of the DTMB performance is output according to the comparison result. This avoids the problem of manual observation of images resulting in small mosaic omissions and the inability to test 24 hours a day. Moreover, the test results of the system are stable and reliable, each test error is less than 0.1 dB, and the manual requires 5 days of test time. The invention only needs 10 hours, thereby greatly improving the test efficiency.

A person skilled in the art should understand that variations may be implemented by those skilled in the art in combination with the prior art and the foregoing embodiments, and no further details are provided herein. Such variations do not affect the substance of the present invention and will not be described herein.

The preferred embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, and that the device and structure are not described in detail. Many variations and modifications of the technical solutions of the present invention can be made, or modified to equivalent variations, without departing from the spirit and scope of the invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments in accordance with the technical spirit of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

A system for automatically testing DTMB performance, comprising:

Test equipment connected to DTMB;

a device under test connected to the test device to receive and play audio and video data of the DTMB broadcast through the test device;

Controlling processing devices, respectively, in two-way communication connection with the test device and the device under test;

The control processing device includes a data storage unit and a determination unit, and the data storage unit stores a plurality of operation parameters and preset error change values;

The control processing device adjusts operation of the test device by retrieving and transmitting the operating parameter to the test device;

The determining unit acquires a real-time error change value of the audio and video data output by the tested device by the measured device, and the determining unit retrieves and compares the preset error code according to the preset error value The real-time error change value is compared. If the real-time error change value is smaller than the preset error change value, the control processing device adjusts the operation of the test device by adjusting the operation parameter.
The system for automatically testing DTMB performance according to claim 1, wherein the preset error change value is the first occurrence of audio and video data output by the tested device after the adjusted test device is played. The error value of the mosaic.
The system for automatically testing DTMB performance according to claim 2, wherein said preset error change value is greater than one.
The system for automatically testing DTMB performance according to claim 1, wherein if the real-time error change value is greater than or equal to the preset error change value, outputting the last time the control processing device retrieves The operating parameter is a test result of DTMB performance.
The system for automatically testing DTMB performance according to claim 1, wherein said device under test is connected to said test device via an audio and video cable.
The system for automatically testing DTMB performance of claim 1 wherein said control processing device is a computer.
A system for automatically testing DTMB performance as recited in claim 6 wherein said test device is coupled to said computer via a network interface.
A system for automatically testing DTMB performance as claimed in claim 6 wherein said device under test is coupled to said computer via a serial port.
A system for automatically testing DTMB performance as recited in claim 1, wherein said error change value is a register change value.
A method for automatically testing DTMB performance, characterized by The system for automatically testing DTMB performance according to any one of claims 1 to 9, the method comprising:

Receiving and playing the audio and video data of the DTMB broadcast by the device under test through the test device;

The control processing device adjusts operation of the test device by retrieving and transmitting the operating parameter to the test device;

The determining unit acquires a real-time error change value of the audio and video data output by the tested device by using the adjusted test device, and retrieves the real-time error code according to the preset error change value. The change value is compared. If the real-time error change value is smaller than the preset error change value, the control processing device adjusts the operation of the test device by adjusting the operation parameter; if the real-time error occurs If the change value is greater than or equal to the preset error change value, the test result that the control parameter is last retrieved is the test result of the DTMB performance.