Set top box HDMI unit test system and test method

Abstract

The invention relates to the technical field of HDMI testing, and discloses a set top box HDMI unit testing system and method, and the system comprises a signal transmitting unit, a data collection unit, a data processing unit, a result evaluation unit, and an information display unit. According to the method, evaluation coefficients in multiple aspects of voltage integrity, voltage difference, voltage fluctuation amplitude, average transmission rate and the like are comprehensively considered, and the performance condition of the HDMI unit of the set top box can be evaluated more comprehensively and objectively; one-sidedness and inaccuracy possibly caused by evaluation only depending on a single index are avoided, the conditions that the test is passed and the test is not passed are clearly divided, and a clear standard is provided for judging whether the product performance is qualified or not; and corresponding abnormal signals are generated in time, so that related personnel can quickly know and process the condition that the test is not passed, the efficiency and effect of product quality control can be improved, and the product performance is ensured to meet the requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of HDMI testing, and in particular to a set-top box HDMI unit testing system and a testing method. Background Art

[0002] With the rapid development of digital TV technology, the performance and quality assurance of set-top boxes as an important part of home entertainment systems have become extremely important. HDMI (High Definition Multimedia Interface) is a commonly used high-definition multimedia interface that plays a key role in transmitting high-quality audio and video signals in set-top boxes.

[0003] However, in actual applications, the set-top box HDMI unit may have performance problems due to various reasons, such as unstable signal transmission, abnormal voltage, insufficient transmission rate, color distortion, etc. These problems will seriously affect the user's viewing experience.

[0004] At present, the testing methods for set-top box HDMI units are often not comprehensive and accurate enough, making it difficult to accurately evaluate their performance and to discover potential problems in a timely manner. Traditional testing methods may only focus on some parameters or use simple qualitative judgments, and are unable to conduct quantitative analysis and comprehensive evaluation of the various performance indicators of HDMI units.

[0005] Therefore, in order to improve the overall quality and reliability of set-top boxes and ensure that users can enjoy high-quality audio and video services, a more comprehensive, accurate and efficient set-top box HDMI unit testing system and testing method is needed to accurately evaluate the performance of the HDMI unit and promptly discover potential problems. Summary of the invention

[0006] The purpose of the present invention is to provide a set-top box HDMI unit testing system and a testing method, which solve the technical problems raised in the background technology.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] Set-top box HDMI unit test system, including:

[0009] A signal sending unit, used for sending a specific test signal to the HDMI unit of the set-top box;

[0010] A data acquisition unit, used for acquiring relevant data corresponding to each test signal output by the HDMI unit;

[0011] A data processing unit, used for preprocessing the data collected from the data collection unit, and then transmitting the preprocessing result to the result evaluation unit;

[0012] A result evaluation unit, used to perform performance evaluation on the set-top box HDMI unit according to the preprocessing result, and determine whether it generates a performance abnormality signal;

[0013] The information display unit is used to display the performance abnormality signal to relevant personnel.

[0014] As a further solution of the present invention: the relevant data includes: the voltage value corresponding to each test signal, the transmission time of each test signal, the data size transmitted by each test signal within the transmission time, the original image corresponding to the test signal and the data image after transmission.

[0015] As a further solution of the present invention: the preprocessing method of the data processing unit is as follows:

[0016] Step D1. Obtain the voltage value corresponding to each test signal and mark it as V i , i = 1, 2, ... n, n represents the number of test signals;

[0017] Step D2, through Calculate the voltage integrity assessment coefficient VP corresponding to all test signals;

[0018] Wherein, Vb refers to the standard voltage value preset during test signal transmission;

[0019] Step D3: Calculate the absolute value of the difference between the voltage values ​​corresponding to each adjacent test signal according to the time trend, and mark it as Vc j , j = 1, 2, ... n-1;

[0020] Step D4, pass Calculate the average value CX of the absolute values ​​of the differences between the voltage values ​​corresponding to all adjacent test signals, and record it as the voltage difference evaluation coefficient CX;

[0021] Step D5, among the voltage values ​​corresponding to all the test signals, obtain the maximum and minimum voltage values, and mark them as Vmax and Vmin respectively;

[0022] Step D6, calculate the voltage fluctuation amplitude evaluation coefficient VF corresponding to the test signal through VF = Vmax-Vmin;

[0023] Step D7, obtain the transmission time and data size corresponding to each test signal, and mark them as Si and Mi respectively;

[0024] Step D8, through Calculate the average transmission rate evaluation coefficient SX corresponding to all test signals;

[0025] In the formula, Indicates the transmission rate corresponding to the test signal of the first time;

[0026] Step D9: Extract the RGB values ​​of multiple pixels in the original image and the data image, and mark them as R0 respectively. t , G0 t , B0 t 、R1 t 、G1 t 、B1 t , t=1, 2, ...g, g represents the number of the same pixel points extracted;

[0027] Among them, R0 t , G0 t , B0 t Indicates the RGB value of the same pixel in the original image, R1 t 、G1 t 、B1 t Indicates the RGB value of the same pixel in the data image;

[0028] Step D10, pass Calculate the color difference evaluation coefficient KC between the original image and the data image.

[0029] As a further embodiment of the present invention: wherein n>1.

[0030] As a further solution of the present invention: the performance evaluation method of the result evaluation unit is as follows:

[0031] Step G1, extracting voltage integrity assessment coefficient VP, voltage difference assessment coefficient CX, voltage fluctuation amplitude assessment coefficient VF, average transmission rate assessment coefficient SX, and color difference assessment coefficient KC;

[0032] Step G2, pass Calculate the performance test parameter Q of the set-top box HDMI unit;

[0033] Where α1, α2, α3, α4, and α5 are preset weight factors;

[0034] Step G3, compare the performance detection parameter Q of the set-top box HDMI unit with the preset performance test threshold Qy:

[0035] If Q>Qy, it means that the test of the set-top box HDMI unit passes and no performance abnormality signal is generated;

[0036] If Q≤Qy, it means that the test of the set-top box HDMI unit fails and a performance abnormality signal is generated.

[0037] A set-top box HDMI unit testing method is implemented by the set-top box HDMI unit testing system.

[0038] Beneficial effects of the present invention:

[0039] The present invention can send a specific test signal to the HDMI unit of the set-top box and collect output related data, including the voltage value of the test signal, the transmission time, the transmission data size, the original image and the data image after transmission, etc.

[0040] The present invention pre-processes the collected data through a data processing unit, calculates a voltage integrity assessment coefficient, a voltage difference assessment coefficient, a voltage fluctuation amplitude assessment coefficient, an average transmission rate assessment coefficient, a color difference assessment coefficient, etc., and provides accurate data support for performance evaluation.

[0041] In the present invention, the result evaluation unit calculates the performance detection parameter by a specific formula according to the preprocessing result, and compares it with the preset threshold value, so as to determine whether the test of the HDMI unit of the set-top box passes and whether a performance abnormality signal is generated.

[0042] In the present invention, the information display unit displays the performance abnormality signal to relevant personnel, so as to facilitate timely discovery and handling of problems.

[0043] In summary, the present invention can comprehensively and accurately test the performance of the HDMI unit of the set-top box and feed back the test results in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Figure 1 The present invention is a system block diagram of a set-top box HDMI unit testing system and a testing method.

[0046] Figure 2 The present invention is a flow chart of a set-top box HDMI unit testing system and a testing method. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Embodiment 1

[0049] See also Figure 1 and Figure 2 As shown, the present invention is a set-top box HDMI unit testing system, comprising:

[0050] A signal sending unit, used for sending a specific test signal to the set-top box HDMI unit, where the test signal is represented as data for testing the set-top box HDMI unit and is presented in the form of a signal;

[0051] A data acquisition unit, used for acquiring relevant data corresponding to each test signal output by the HDMI unit;

[0052] The relevant data include: the voltage value corresponding to each test signal;

[0053] A data processing unit, used for preprocessing the data collected from the data collection unit, and then transmitting the preprocessing result to the result evaluation unit;

[0054] The preprocessing method is as follows:

[0055] First, obtain the voltage value corresponding to each test signal;

[0056] Then, the square of the difference between the voltage value corresponding to each test signal and the standard voltage value is calculated; wherein the standard voltage value refers to the reference value preset when the test signal is transmitted;

[0057] Then, the squares of all the differences are summed and divided by the number of test signals to obtain the voltage integrity assessment coefficients corresponding to all the test signals;

[0058] The result evaluation unit is used to evaluate the performance of the set-top box HDMI unit based on the pre-processing results:

[0059] The performance evaluation method is as follows:

[0060] Compare the voltage integrity assessment coefficient corresponding to the set-top box HDMI unit with the preset voltage integrity assessment threshold:

[0061] If the voltage integrity assessment coefficient is greater than the voltage integrity assessment threshold, it indicates that the relevant performance test of the set-top box HDMI unit fails, and an abnormal signal 1 is generated;

[0062] If the voltage integrity assessment coefficient is less than or equal to the voltage integrity assessment threshold, it means that the relevant performance test of the set-top box HDMI unit has passed, and no abnormal signal one is generated;

[0063] The information display unit is used to display relevant abnormal signals to relevant personnel.

[0064] This embodiment evaluates the performance of the set-top box HDMI unit by calculating the voltage integrity evaluation coefficient and comparing it with a preset threshold, which can accurately determine its performance in terms of voltage stability and help to promptly discover voltage-related performance problems.

[0065] Embodiment 2

[0066] As the second embodiment of the present invention, when the present application is specifically implemented, compared with the first embodiment, the technical solution of this embodiment is different from that of the first embodiment only in that in this embodiment, the preprocessing method of the data processing unit is also as follows:

[0067] First, according to the time trend, the absolute value of the difference between the voltage values ​​corresponding to each adjacent test signal is calculated;

[0068] Then, the average of the absolute values ​​of the differences between the voltage values ​​corresponding to all adjacent test signals is calculated and recorded as the voltage difference evaluation coefficient;

[0069] The performance evaluation method of the result evaluation unit is also as follows:

[0070] Compare the voltage difference evaluation coefficient corresponding to the set-top box HDMI unit with the preset voltage difference evaluation threshold:

[0071] If the voltage difference evaluation coefficient is greater than the voltage difference evaluation threshold, it means that the relevant performance test of the set-top box HDMI unit fails, and abnormal signal 2 is generated;

[0072] If the voltage difference evaluation coefficient is less than or equal to the voltage difference evaluation threshold, it means that the relevant performance test of the set-top box HDMI unit has passed, and no abnormal signal 2 is generated;

[0073] This embodiment adds the calculation and comparison of the average absolute value of the difference between the voltage values ​​of adjacent test signals, which can more comprehensively evaluate the stability of voltage changes and improve the accuracy of performance judgment.

[0074] Embodiment 3

[0075] As the third embodiment of the present invention, when the present application is implemented, compared with the first and second embodiments, the technical solution of this embodiment is different from the first and second embodiments only in that in this embodiment, the preprocessing method of the data processing unit is also as follows:

[0076] First, among the voltage values ​​corresponding to all test signals, obtain the maximum and minimum voltage values;

[0077] Then, the voltage value with the largest corresponding value among all adjacent test signals is subtracted from the voltage value with the largest corresponding value among all adjacent test signals, and the resulting value is recorded as the voltage fluctuation amplitude assessment coefficient;

[0078] The performance evaluation method of the result evaluation unit is also as follows:

[0079] Compare the voltage fluctuation amplitude assessment coefficient corresponding to the set-top box HDMI unit with the preset voltage fluctuation amplitude assessment threshold:

[0080] If the voltage fluctuation amplitude assessment coefficient is greater than the voltage fluctuation amplitude assessment threshold, it means that the relevant performance test of the set-top box HDMI unit fails, and abnormal signal three is generated;

[0081] If the voltage fluctuation amplitude assessment coefficient is less than or equal to the voltage fluctuation amplitude assessment threshold, it indicates that the relevant performance test of the set-top box HDMI unit has passed, and abnormal signal three is not generated.

[0082] This embodiment calculates the voltage fluctuation amplitude assessment coefficient by obtaining the maximum and minimum voltage values, which can effectively measure the degree of voltage fluctuation and more accurately detect possible voltage fluctuation problems.

[0083] Embodiment 4

[0084] As the fourth embodiment of the present invention, when the present application is specifically implemented, compared with the first embodiment, the second embodiment and the third embodiment, the technical solution of this embodiment is different from the first embodiment, the second embodiment and the third embodiment only in that in this embodiment, the relevant data also includes: the transmission time of each test signal, the data size transmitted by each test signal within the transmission time;

[0085] The preprocessing method of the data processing unit is also as follows:

[0086] First, obtain the transmission time and data size corresponding to each test signal;

[0087] Then, the transmission rate corresponding to each test signal is calculated by dividing the data size by the transmission time;

[0088] Sum all transmission rates and divide by the number of test signals to obtain the average transmission rate evaluation coefficient corresponding to all test signals;

[0089] The performance evaluation method of the result evaluation unit is also as follows:

[0090] Compare the average transmission rate evaluation coefficient corresponding to the set-top box HDMI unit with the preset average transmission rate evaluation threshold:

[0091] If the average transmission rate evaluation coefficient is less than or equal to the average transmission rate evaluation threshold, it means that the relevant performance test of the set-top box HDMI unit fails, and a transmission abnormality signal is generated;

[0092] If the average transmission rate evaluation coefficient is greater than the average transmission rate evaluation threshold, it means that the relevant performance test of the set-top box HDMI unit has passed and no transmission abnormality signal is generated.

[0093] This embodiment takes into account the transmission time of the test signal and the size of the transmitted data, calculates the average transmission rate evaluation coefficient, and can evaluate the performance in terms of transmission rate to ensure the efficiency of data transmission.

[0094] Embodiment 5

[0095] As the fifth embodiment of the present invention, when the present application is specifically implemented, compared with the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, the technical solution of this embodiment is different from the first embodiment, the second embodiment, the third embodiment and the fourth embodiment only in that in this embodiment, the relevant data also includes: the original image corresponding to the test signal and the transmitted data image;

[0096] The preprocessing method of the data processing unit is also as follows:

[0097] First, extract the RGB values ​​of multiple pixels of the same pixel in the original image and the data image, and mark them as R0 and R1 respectively. t , G0 t , B0 t 、R1 t 、G1 t 、B1 t , t=1, 2, ...g, g represents the number of the same pixel points extracted;

[0098] Among them, R0 t , G0 t , B0 t Indicates the RGB value of the same pixel in the original image, R1 t 、G1 t 、B1 t Indicates the RGB value of the same pixel in the data image;

[0099] Then through Calculate the color difference evaluation coefficient KC between the original image and the data image;

[0100] The performance evaluation method of the result evaluation unit is also as follows:

[0101] Compare the color difference evaluation coefficient corresponding to the set-top box HDMI unit with the preset color difference evaluation coefficient threshold:

[0102] If the color difference evaluation coefficient is greater than the color difference evaluation coefficient threshold, it means that the relevant performance test of the set-top box HDMI unit fails, and a color abnormality signal is generated;

[0103] If the color difference evaluation coefficient is less than or equal to the color difference evaluation coefficient threshold, it means that the relevant performance test of the set-top box HDMI unit has passed and no color abnormality signal is generated.

[0104] This embodiment introduces the color difference evaluation between the original image and the transmitted data image, focuses on the color accuracy of the image transmission, and improves the evaluation capability of the image transmission quality.

[0105] Embodiment 6

[0106] As the sixth embodiment of the present invention, when the present application is specifically implemented, compared with the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment, the technical solution of this embodiment is different from the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment only in that in this embodiment, the technical solution of this embodiment is to combine the solutions of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment for implementation;

[0107] The difference between the combined implementations is that the performance evaluation method of the result evaluation unit is also as follows:

[0108] Step G1, extract the voltage integrity assessment coefficient, voltage difference assessment coefficient, voltage fluctuation amplitude assessment coefficient, and average transmission rate assessment coefficient, and mark them as VP, CX, VF, and SX respectively;

[0109] Step G2, pass Calculate the performance test parameter Q1 of the set-top box HDMI unit;

[0110] Where α1, α2, α3, and α4 are preset weight factors;

[0111] Step G3, compare the performance detection parameter Q1 of the set-top box HDMI unit with the preset performance test threshold Q1y:

[0112] If Q1≤Q1y, it means that the test of the set-top box HDMI unit fails and a performance abnormality signal is generated;

[0113] If Q1>Q1y, it means that the test of the set-top box HDMI unit has passed and no performance abnormality signal is generated.

[0114] The evaluation coefficients of voltage integrity, voltage difference, voltage fluctuation amplitude and average transmission rate are comprehensively considered, which can evaluate the performance of the set-top box HDMI unit more comprehensively and objectively. It avoids the one-sidedness and inaccuracy that may be caused by relying on a single indicator evaluation, clearly divides the test pass and fail situations, and provides a clear standard for judging whether the product performance is qualified; timely generates performance abnormality signals, which facilitates relevant personnel to quickly know and deal with the test failure situation, which helps to improve the efficiency and effectiveness of product quality control and ensure that product performance meets the requirements.

[0115] Embodiment 7

[0116] As the seventh embodiment of the present invention, when the present application is specifically implemented, compared with the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment and the sixth embodiment, the technical solution of this embodiment is different from the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment and the sixth embodiment only in that in this embodiment, the technical solution of this embodiment is to combine the solutions of the above-mentioned first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment for implementation, and the difference in the combined implementation mode is that the performance evaluation method of the result evaluation unit is also as follows:

[0117] The performance evaluation method of the result evaluation unit is also as follows:

[0118] Step G1, extract the voltage integrity assessment coefficient, voltage difference assessment coefficient, voltage fluctuation amplitude assessment coefficient, average transmission rate assessment coefficient, and color difference assessment coefficient; and mark them as VP, CX, VF, SX, and KC respectively;

[0119] Step G2, pass Calculate the performance test parameter Q of the set-top box HDMI unit;

[0120] Where α1, α2, α3, α4, and α5 are preset weight factors;

[0121] Step G3, compare the performance detection parameter Q of the set-top box HDMI unit with the preset performance test threshold Qy:

[0122] If Q>Qy, it means that the test of the set-top box HDMI unit passes and no performance abnormality signal is generated;

[0123] If Q≤Qy, it means that the test of the set-top box HDMI unit fails and a performance abnormality signal is generated;

[0124] The information display unit is also used to display performance abnormality signals to relevant personnel.

[0125] This embodiment comprehensively calculates the multiple evaluation coefficients in the above embodiments to obtain performance detection parameters, so as to more comprehensively and comprehensively evaluate the performance of the HDMI unit of the set-top box, thereby improving the accuracy and reliability of the evaluation.

[0126] The present invention also provides a set-top box HDMI unit testing method, which is implemented by the set-top box HDMI unit testing system, and the method comprises the following steps:

[0127] Step 1: Signal sending

[0128] Sending a specific test signal to the set-top box HDMI unit through the signal sending unit;

[0129] Step 2: Data Collection

[0130] The data acquisition unit collects relevant data corresponding to each test signal output by the HDMI unit;

[0131] Step 3: Data processing

[0132] Preprocessing the relevant data collected from the data collection unit by the data processing unit;

[0133] Step 4: Data Evaluation

[0134] The result evaluation unit combines the preprocessing result to evaluate the performance of the set-top box HDMI unit and determines whether it generates a corresponding abnormal signal;

[0135] Step 5: Data display

[0136] The corresponding abnormal signal is displayed to relevant personnel through the information display unit.

[0137] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters and thresholds in the formula are set by technicians in this field according to actual conditions.

[0138] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. Set-top box HDMI unit test system, characterized in that: include: A signal sending unit, used for sending a specific test signal to the HDMI unit of the set-top box; A data acquisition unit, used for acquiring relevant data corresponding to each test signal output by the HDMI unit; A data processing unit, used for preprocessing the relevant data collected from the data collection unit, and then transmitting the preprocessing result to the result evaluation unit; A result evaluation unit, used to evaluate the performance of the HDMI unit of the set-top box according to the preprocessing result, and determine whether it generates a corresponding abnormal signal; The information display unit is used to display the corresponding abnormal signal to relevant personnel.

2. The set-top box HDMI unit testing system according to claim 1, characterized in that: The relevant data include: the voltage value corresponding to each test signal, the transmission time of each test signal, and the size of data transmitted by each test signal within the transmission time.

3. The set-top box HDMI unit testing system according to claim 2, characterized in that: The preprocessing method is as follows: Step D1, obtain the voltage value corresponding to each test signal, Step D2, calculate the square of the difference between the voltage value corresponding to each test signal and the standard voltage value; wherein the standard voltage value refers to the reference value preset when the test signal is transmitted; Sum the squares of all the differences and divide them by the number of test signals to obtain voltage integrity assessment coefficients corresponding to all test signals; Step D3, according to the time trend, calculate the absolute value of the difference between the voltage values ​​corresponding to each adjacent test signal; Step D4, calculate the average of the absolute values ​​of the differences between the voltage values ​​corresponding to all adjacent test signals, and record it as the voltage difference evaluation coefficient; Step D5, among the voltage values ​​corresponding to all the test signals, obtain the maximum and minimum voltage values; Step D6, subtract the voltage value with the largest corresponding value among all adjacent test signals from the voltage value with the largest corresponding value among all adjacent test signals, and record the resulting value as the voltage fluctuation amplitude assessment coefficient; Step D7, obtain the transmission time and data size corresponding to each test signal; Step D8, calculate the transmission rate corresponding to each test signal by dividing the data size by the transmission time; Sum all transmission rates and divide them by the number of test signals to obtain the average transmission rate evaluation coefficient corresponding to all test signals.

4. The set-top box HDMI unit testing system according to claim 3, characterized in that: The performance evaluation method is as follows: Step G1, extract the voltage integrity assessment coefficient, voltage difference assessment coefficient, voltage fluctuation amplitude assessment coefficient, and average transmission rate assessment coefficient; and mark them as VP, CX, VF, and SX respectively; Step G2, pass Calculate the performance test parameter Q1 of the set-top box HDMI unit; Where α1, α2, α3, and α4 are preset weight factors; Step G3, compare the performance detection parameter Q1 of the set-top box HDMI unit with the preset performance test threshold Q1y: If Q1≤Q1y, it means that the test of the set-top box HDMI unit fails and a performance abnormality signal is generated.

5. The set-top box HDMI unit testing system according to claim 4, characterized in that: If Q1>Q1y, it means that the test of the set-top box HDMI unit has passed and no performance abnormality signal is generated.

6. The set-top box HDMI unit testing system according to claim 1, characterized in that: in, The number of test signals should not be less than 2.

7. The set-top box HDMI unit testing system according to claim 1, characterized in that: The relevant data also includes the original image corresponding to the test signal and the data image after transmission; The data processing unit is also used to preprocess the original image corresponding to the test signal and the transmitted data image, and the preprocessing method is as follows: First, extract the RGB value of the same pixel in the original image and the data image; Then, at the same pixel point of the original image and the data image, the square difference between the two groups of R values, the square difference between the two groups of G values, and the square difference between the two groups of B values ​​are calculated respectively; Then, the squares of the corresponding differences of the RGB values ​​of the same pixel are added, and the square root of the result is calculated, and the color difference value of the original image and the data image at the same pixel is obtained; Then, the color values ​​of multiple pixels are obtained in the above manner, and the average of the multiple color values ​​is calculated, and then the average is recorded as the color difference evaluation coefficient between the original image and the data image.

8. The set-top box HDMI unit testing system according to claim 7, characterized in that: The result evaluation unit also performs performance evaluation on the set-top box HDMI unit according to the color difference evaluation coefficient, in the following manner: Compare the color difference evaluation coefficient corresponding to the set-top box HDMI unit with the preset color difference evaluation coefficient threshold: If the color difference evaluation coefficient is greater than the color difference evaluation coefficient threshold, it indicates that the relevant performance test of the set-top box HDMI unit has failed, and a color abnormality signal is generated; If the color difference evaluation coefficient is less than or equal to the color difference evaluation coefficient threshold, it means that the relevant performance test of the set-top box HDMI unit has passed and no color abnormality signal is generated.

9. A method for testing a set-top box HDMI unit, characterized in that: The method is implemented by the set-top box HDMI unit testing system described in any one of claims 1-8.

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