WO2018223670A1

WO2018223670A1 - Voltage acquisition method and device, and storage medium

Info

Publication number: WO2018223670A1
Application number: PCT/CN2017/118959
Authority: WO
Inventors: 陈斯帆; 李欢; 陈刚
Original assignee: 深圳市创维软件有限公司
Priority date: 2017-06-06
Filing date: 2017-12-27
Publication date: 2018-12-13
Also published as: CN107318048B; CN107318048A

Abstract

A voltage acquisition method and device, and a storage medium. The method comprises: setting a voltage value of a modulator to be a pre-set initial voltage value and sending a video stream at a pre-set frequency point value to a set top box; when it is monitored that the set top box outputs the video stream, intercepting and saving a first pre-set number of frames of pictures from the video stream; determining the current playing state of the video stream according to the pictures; adjusting the voltage value of the modulator and monitoring the next playing state in real time, and determining whether the playing state has changed; and if the playing state has not changed, cyclically executing the step of adjusting the voltage value of the modulator and monitoring the next playing state in real time, and comparing the current playing state with the next playing state to determine whether the playing state has changed, until the playing state has changed twice, and respectively recording two voltage values corresponding to the two changes as a first voltage threshold and a second voltage threshold corresponding to the pre-set frequency point value.

Description

Voltage collecting method, device and storage medium

Technical field

The present disclosure relates to the field of set top boxes, for example, to a voltage collection method, device, and storage medium.

Background technique

The set-top box tuner module is a very important part of the set-top box hardware, also known as the low-noise amplifier. The sensitivity indicator is an important indicator in the set-top box. There are two methods for collecting the voltage of the video stream signal received by the set-top box tuner module, manual test acquisition and passing the bit error rate test index.

The method of collecting voltage by manual testing has a long time period and is prone to error in the case of human fatigue. The threshold voltage collection results need to be manually input into the spreadsheet, which affects work efficiency, increases human resource consumption, and increases product development costs.

The error is tested by the bit error rate test (ie, the maximum test voltage and the minimum test voltage), and the error is unacceptable.

Summary of the invention

The present disclosure provides a voltage collection method, device, and storage medium to solve the problem of low voltage collection efficiency, large error, and high cost of signals received by the set top box high frequency head module.

A voltage collection method includes:

Setting a modulator voltage value to a preset initial voltage value and transmitting the video stream at the preset frequency point value to the set top box, wherein the initial voltage value corresponds to the preset frequency point value;

When the set top box is monitored to output the video stream, intercepting a picture of the first preset number of frames in the video stream and saving the image;

Determining, according to the picture, a current playing state of the video stream, where the playing state includes normal playing and abnormal playing;

Adjusting the voltage value of the modulator and monitoring the next playing state in real time, and comparing the current playing state with the next playing state to determine whether the playing state is changed;

If the playing state is unchanged, the voltage value of the modulator is cyclically executed and the next playing state is monitored in real time, and the current playing state and the next playing state are compared to determine whether the playing state is changed. Steps, until the playing state is changed twice and separately recording the two voltage values corresponding to the two changes to obtain a corresponding first voltage threshold and a second voltage threshold at the preset frequency value.

The voltage collection method further includes:

When a plurality of preset frequency point values are detected, respectively acquiring initial voltage values corresponding to the plurality of preset frequency point values, and the plurality of preset frequency point values and the plurality of preset frequency points The initial voltage value corresponding to the value is introduced into the modulator;

Obtaining a first threshold voltage value and a second threshold voltage value at the plurality of preset frequency point values according to the sequence of the plurality of frequency point values.

The voltage collection method, wherein the determining, according to the picture, a play status of the video includes:

Determining, according to the picture, whether the video stream is black, stuck, or has noise;

When the video stream is not black, is not stuck, and there is no noise, it is determined that the video stream playing state is normal playing;

When a black screen, a stuck or a noise occurs in the video stream, it is determined that the playing state of the video stream is a play exception.

The voltage collection method, wherein determining whether the video stream is black according to the picture comprises:

Converting the picture into a grayscale image and binarizing the grayscale image;

Counting the number of bright points in the grayscale image after binarization of the grayscale image, and comparing the number of the bright spots with a preset number threshold;

When the number of bright spots is less than the threshold number, the counter is incremented by one;

When the value of the counter is equal to the first preset number of frames, it is determined that the video stream is black.

The voltage collection method, wherein the determining, according to the picture, whether a video stream is stuck comprises:

Loading the picture in a grayscale manner and reducing the size of the picture to a preset second size;

Converting the picture of the second size into a histogram and comparing the similarity between the two pictures;

When the similarity is greater than a preset value, it is determined that the video stream is stuck.

The voltage collecting method, wherein the determining, according to the picture, whether the video stream has noise includes:

Converting the picture into a grayscale image and binarizing the grayscale image, and determining whether the binarized grayscale image has a mosaic;

Record the mosaiced picture and traverse all the images with mosaics;

When two consecutive mosaic pictures appear more than two times or three consecutive pictures have mosaics, it is determined that there is noise in the video stream.

The voltage collecting method, wherein when the set-top box is detected to output the video stream, intercepting a picture of the first preset number of frames in the video stream and saving includes:

When the set-top box is monitored to output the video stream, the second preset frame number is read by a frame of a preset size and the number of intercepted frames is recorded;

When the number of intercepted frames reaches the first preset number of frames, stop capturing and saving all the pictures.

The voltage collecting method, wherein the adjusting the voltage value of the modulator and monitoring the next playing state in real time, and comparing the current playing state with the next playing state to determine whether the playing state is changed includes:

Adjusting the voltage value of the modulator according to a preset rule and monitoring the next play state in real time;

Comparing the current play state with the next play state;

If the current playing state and the next playing state are both abnormal playback or normal playback, it is determined that the playing state does not change.

A voltage collecting device comprising:

a processor adapted to implement a plurality of instructions;

A storage device adapted to store a plurality of instructions adapted to be loaded by a processor and to perform a voltage acquisition method as described above.

A storage medium storing computer executable instructions arranged to perform a voltage collection method as described above.

A computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to execute Any of the above methods.

The voltage collection method, device and storage medium provided by the present disclosure automatically acquire the maximum voltage threshold value and the minimum voltage threshold value by monitoring whether the playback state of the video changes in real time, thereby liberating the work of manually collecting the threshold voltage and reducing the collection cost.

DRAWINGS

FIG. 1 is a flowchart of a voltage collecting method provided by this embodiment.

FIG. 2 is a flowchart of step 200 in the voltage collection method provided by this embodiment.

FIG. 3 is a flowchart of step 300 in the voltage collection method provided by this embodiment.

FIG. 4 is a flowchart of step 301 in the voltage collecting method provided by this embodiment.

FIG. 5 is a flowchart of determining a black screen of a video stream in the voltage collecting method provided in the embodiment.

FIG. 6 is a flowchart of determining a video stream jam in the voltage collection method according to the embodiment.

FIG. 7 is a flowchart of determining noise in a video stream in the voltage collecting method provided in the embodiment.

FIG. 8 is a flowchart of step 400 in the voltage collecting method provided by this embodiment.

FIG. 9 is a flowchart of another voltage collecting method provided by this embodiment.

FIG. 10 is a schematic structural diagram of a voltage collecting device according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of hardware of a voltage collecting device according to an embodiment of the present invention.

detailed description

The present disclosure will be described below by way of a description of embodiments with reference to the accompanying drawings.

Please refer to FIG. 1. FIG. 1 is a flowchart of a voltage collection method according to an embodiment. The method includes the following steps.

In step 100, the modulator voltage value is set to a preset initial voltage value and the video stream at the preset frequency point value is sent to the set top box, wherein the initial voltage value corresponds to the preset frequency point value.

Optionally, the voltage value is a voltage value of the modulator itself, the voltage value determining a signal strength of a video stream transmitted by the modulator. In the judgment of the sensitivity of the set-top box high-frequency head, the voltage value is used to determine whether the hardware of the set-top box product meets the requirements of the product specification. If the requirements are not met, the received code stream is unstable due to hardware reasons, and the voltage value is determined according to the hardware value. Set the product specifications of the set-top box. The preset frequency point value is a preset frequency point value, and the frequency point value may be one or more. The initial voltage value corresponds to the frequency point value, that is, the initial voltage values corresponding to different frequency point values may be the same or different, and the initial voltage value is set according to the product specification of the set top box to start the collecting process.

In step 200, when the set top box is monitored to output the video stream, the picture of the first preset number of frames in the video stream is intercepted and saved.

Optionally, the set top box receives the video stream data at the frequency point value sent by the modulator by using a radio frequency (RF) receiving head, and passes through a high-definition multimedia interface (HDMI). The interface outputs the video stream data to a display interface to play the video.

In this embodiment, when the set top box outputs the video stream, intercepting the picture of the first preset number of frames in the video stream and saving may include the following steps.

In step 201, when the set top box is monitored to output the video stream, a second preset frame number is read at intervals of one frame and the number of intercepted frames is recorded.

In step 202, when the number of intercepted frames reaches the first preset number of frames, the interception is stopped and all the pictures are saved in the jpg format.

Optionally, in the step 201, the interception frequency may be intercepted for each frame of data, or may be intercepted once by the second preset number of frames. Since the human eye can distinguish the video difference in 4-6 frames, in the present embodiment, the data can be intercepted once every 4 frames. In this way, when reading picture data, it is not necessary to read every frame, so as to effectively save memory space and reduce the workload of image processing. The preset size is a size (for example, width and height) of a picture to be read that is set in advance. The size of the picture data is the same as the video source width or the resolution of the set-top box settings. In this way, it can be ensured that there is no black edge compensation, because if there is a black edge, the captured picture will detect the line when the mosaic is judged, resulting in an error. The first preset frame number refers to the number of frames of the picture data to be intercepted, and the total number of pictures to be captured may be calculated according to the frame rate and time of the video.

In an actual application, when the set top box outputs the video stream, the process of reading a frame of preset frame size and recording the number of intercepted frames by the second preset frame number may be the following content.

Initializing the acquisition card installed in the test end; setting the width and height of the picture to be collected to the acquisition card; reading the frame data by 4 frames at intervals of the acquisition card and saving the read data as jpg format; collecting card cycle Read the picture data until the number of pictures read reaches the preset value; close the capture card.

In step 300, the current play state of the video stream is determined according to the picture, where the play status includes normal play and abnormal play.

Optionally, the play status refers to the image quality of video playback. The normal play means that there is no black screen, jam and noise when the video is played. The playback abnormality refers to a phenomenon in which a black screen, a card is stuck, or a noise occurs during video playback, and the video cannot be viewed normally. A black screen refers to a black screen with no video signal on the display interface. The video card dead refers to the phenomenon that the played video is frozen due to the unstable code stream, that is, the intercepted multi-frame pictures are the same. Video presence noise refers to the presence of mosaics in the pictures. Since the noise detection core algorithm determines whether the intercepted picture contains lines, if the video is not a solid color or a transition color, the detection will be misjudged. Therefore, in the present embodiment, the video stream played by the modulator is composed of pictures of a solid color or a transition color.

Exemplarily, determining the current playing state of the video stream according to the picture may include the following steps.

In step 301, it is determined whether the video stream is black, stuck, or has noise according to the picture.

In step 302, when the video stream is not black, is not stuck, and there is no noise, it is determined that the video stream playing state is normal.

In step 303, when the video stream has a black screen, a stuck or a noise, it is determined that the playing state of the video stream is a play exception.

Optionally, in the step 301, since there is a possibility that the signal is not received during the test, the received signal is displayed as a black screen, and the voltage at this time is also unsatisfactory. Therefore, it is determined whether the video is Before the card is stuck or there is noise, it also includes a process of judging whether it is a black screen. Only when the video is not black, it is judged whether it is stuck or there is noise, which can save the steps of image processing and save test resources. Therefore, as shown in FIG. 4, the step 301 can include the following steps.

In step 3011, it is determined whether the video stream is black based on the picture.

In step 3012, when the video stream is not a black screen, it is determined whether the video stream is stuck or there is noise according to the picture.

Optionally, in the step 3011, the black screen determines the number of bright pixels of the picture. If the number of bright pixels of all the pictures is less than the height (width) of the picture, the video is black. As shown in FIG. 5, the process of determining whether the video stream is a black screen may include the following steps.

In step H10, the picture is converted to a grayscale image, and the grayscale image is binarized.

In step H20, the number of bright points in the grayscale image after binarization of the grayscale image is counted, and the number of bright spots is compared with a preset number threshold.

In step H30, when the number of bright spots is less than the number threshold, the counter is incremented by one.

In step H40, when the value of the counter is equal to the first preset number of frames, it is determined that the video stream is black.

Optionally, the binarization is also called a grayscale division (Threshold), and the gray scale of the general image is divided into two gray values, that is, a gray value is set, and the gray scale of the image itself is greater than its If it is a bright spot and the gray value is lower than the set value, it will be a dark spot. The preset number threshold is a preset number of bright spots, for example, 1000. That is, when the number of bright spots is less than 1000, it is determined that the grayscale image is a black screen. When all the pictures intercepted are black screens, that is, the value of the counter is equal to the number of all pictures, it is determined that the video stream is a black screen. This shows that in this test, the set-top box has no signal output to the test terminal. When it is a black screen, it indicates that the set-top box has no signal output to the display interface, and determines that the current playing state is abnormal for playing; when it is not black, it indicates that the set-top box has a signal output to the display interface, and step 3012 is performed.

In the step 303, the possible cause of the jam is that the received code stream signal is poor under the voltage value, so that the code stream is unstable, causing the play to be abnormal. The noise directly affects the picture quality. Therefore, after determining that the set-top box has a signal output, it is determined whether the video is stuck or there is noise.

In this embodiment, as shown in FIG. 6, determining whether the video stream is stuck according to the picture may include the following steps.

In step M10, the picture is loaded in a grayscale manner, and the size of the picture is reduced to a preset second size.

In step M20, the picture of the second size is converted into a histogram, and the similarity between the two pictures is compared.

In step M30, when the similarity is greater than a preset value, it is determined that the video stream is stuck.

Optionally, the preset second size is a preset reduced size, for example, 256*256. Reducing the picture to the second size uniformly can speed up the calculation and improve the processing efficiency. The preset value is a preset similarity threshold, for example, 0.9, 0.95, and the like. Reading the picture into the memory as a grayscale image, and reducing the size of the image to the second size; calculating the histogram data of the reduced image, and comparing the histogram data of the two images; if the similarity is greater than 0.9, determining The two pictures are similar; repeat the above steps, and compare the preset frame pictures in the order of the screenshots. When all the similarities are greater than 0.9, that is, all the captured pictures are similar, the video stream card is determined. dead.

In this embodiment, as shown in FIG. 7, determining whether the video stream has noise according to the preset frame picture may include the following steps.

In step N10, the picture is converted into a grayscale image and the grayscale image is binarized, and it is determined whether the binarized grayscale image has a mosaic.

In step N20, the picture in which the mosaic exists is recorded, and all the pictures in which the mosaic exists are traversed.

In step N30, when two consecutive mosaic pictures appear more than two times or three consecutive pictures have mosaics, it is determined that there is noise in the video stream.

Optionally, in the step N10, the grayscale image is edged and binarized. If the image is a solid color or a transition color, the data will be black after the completion of the data, if there is a mosaic or other lines, There is noise. The representation of the mosaic is a color block. The color block is surrounded by lines. The color of the pixel is adjusted to a single channel 0-255 through the grayscale image, and the line is outlined as white by the edge of the image, and the non-line portion is black. In this embodiment, it is determined whether the mosaic appears by counting the number of bright spots, wherein the number of bright spots is the number of pixels of the border of the mosaic color block after the image is edged. The process of judging whether there is noise is: counting the number of bright spots. If the number of bright spots is greater than 100, it indicates that there is a mosaic, and the map is recorded. At this moment, it is not directly judged that there is noise because it is possible to capture the interframe, so multiple sheets are needed. It can be judged as noise in succession for several times.

Optionally, in the step N20, the picture counted in the N10 is traversed, and three or more consecutive pictures or two consecutive pictures are displayed for two or more times. When the picture is established, it indicates that there is noise in the test. Because the picture is captured at intervals of 4 frames, two times appear that there are two pictures in the 8 frames of the picture as mosaic, and the mosaic must be continuous multiple times. The reason why a single sheet cannot be judged is that the video is a dynamic video and consists of different pictures. When two pictures are refreshed, the acquisition card may take an interframe picture (the upper part or the left part is the previous frame picture, the lower part) Part or half of the picture is the next frame. At this time, the noise judgment will be misjudged. Therefore, by judging three or more consecutive pictures or two consecutive pictures, the accuracy of noise determination can be improved, and false positives can be avoided.

In step 400, the voltage value of the modulator is adjusted and the next play state is monitored in real time, and the current play state is compared with the next play state to determine whether the play state is changed.

Illustratively, as shown in FIG. 8, the step 400 may include the following steps.

In step 401, the voltage value of the modulator is adjusted according to a preset rule and the next play state is monitored in real time.

In step 402, the current play state and the next play state are compared.

In step 403, if the current play state and the next play state are both abnormal playback or normal playback, it is determined that the play state does not change.

Optionally, the preset rule refers to a preset rule for adjusting a voltage. For example, the voltage value can be adjusted at a certain interval, that is, 0.5V can be adjusted up/down each time, so that the voltage value of the modulator is sequentially adjusted. Of course, it can also be adjusted according to the empirical value.

The voltage collecting device monitors the next playing state of the video stream sent after the modulator voltage is adjusted in real time. After receiving the next play state, the current play state is compared with the next acquired play state. If the two are the same, the play state is determined to be unchanged; if the two are different, the play state is determined to be changed. For example, the current playing state is a play exception, and the next played state monitored is a play exception, and the second detected play state is the same, indicating that the current video stream voltage does not reach the voltage that the set box's tuner can normally process. Therefore, it is necessary to continue to adjust the voltage of the video stream input to the set top box.

In step 500, if the playing state is unchanged, the step 400 is performed cyclically until the playing state is changed twice, and the two voltage values corresponding to the two changes are respectively recorded to obtain the preset frequency point. The first voltage threshold and the second voltage threshold corresponding to the value.

Optionally, the first threshold voltage value and the second threshold voltage value are voltage values of the adjusted modulator at a certain point, and the two form a voltage interval, in which the set top box can acquire the modulator at the location The video signal at the frequency point value is output, and the noise-free video is output for playing, so the first voltage threshold and the second voltage threshold can reflect the sensitivity of the set-top box tuner module. If the playing state does not change, it indicates that the current playing state and the next playing state are both normal playing or abnormal playing, then continue to adjust the voltage value of the modulator and continuously monitor the adjusted playing state (ie, next play) State) until the first change occurs, and the corresponding adjusted voltage when the first change is recorded, that is, the first voltage threshold; continue to adjust the voltage value of the modulator until the monitored play state changes again, Then, a corresponding second voltage threshold value is recorded when the second change is made, and the first voltage threshold value and the second voltage threshold value are two voltage threshold values at the frequency point value.

Subsequently, it can be determined according to the two voltage thresholds whether the sensitivity of the high frequency head module of the set top box meets the requirements of the product specification. In this way, by automatically collecting the threshold voltage value of the video stream that can be normally played after the high-frequency head of the set-top box is processed, the purpose of liberating the tester is achieved, so that the tester of the set-top box high-frequency head sensitivity test is not very familiar, and the test set can also test the set-top box height. Frequency sensitivity indicator. And automated acquisition can cover all Digital Video Broadcasting (DVB) boxes, increasing coverage and scope, saving the cost of collecting critical voltage values.

In another embodiment, when the frequency value to be tested is a plurality of values, as shown in FIG. 9, testing the threshold voltage value at the plurality of frequency point values may include the following steps. In step M1, when a plurality of preset frequency point values are detected, the initial voltage values corresponding to the plurality of preset frequency point values are respectively acquired, and the plurality of preset frequency point values are The initial voltage value corresponding to the preset frequency point value is introduced into the modulator.

In step M2, setting a modulator set voltage value to a preset first initial voltage value and transmitting the video stream at the preset first frequency point value to the set top box, wherein the first initial voltage value and the first A frequency point value corresponds.

In step M3, when the set top box is monitored to output the video stream, the picture of the first preset number of frames in the video stream is intercepted and saved.

In step M4, the current play state of the video stream is determined according to the picture, where the play status includes normal play and abnormal play.

In step M5, the voltage value of the modulator is adjusted and the next play state is monitored in real time, and the current play state and the next play state are compared to determine whether the play state is changed.

In step M6, if the playing state is unchanged, the step M5 is cyclically executed until the playing state is changed twice, and the two voltage values corresponding to the two changes are respectively recorded to obtain the preset frequency point. The first voltage threshold and the second voltage threshold corresponding to the value.

In step M7, the steps M2-M6 are sequentially executed in sequence according to the sequence of the plurality of frequency point values to respectively acquire the first threshold voltage value and the second threshold voltage value at the plurality of preset frequency point values. .

In this embodiment, since there are a plurality of frequency points to be measured, it is necessary to control the modulator to transmit the modulated video stream signal at different frequency point values to the set top box, so setting the voltage of the modulator to the preset Before the initial voltage value is set and the video stream at the preset frequency point value is sent to the set top box, the process of importing and setting the frequency point value may also be included, the process may be: controlling the modulator to play the video stream to be sent and setting multiple a frequency point value; sending a setting command to the set top box to cause the set top box to set the frequency point value to the preset frequency point value and searching for the channel; and transmitting the video stream at the preset frequency point value according to the channel control modulator of the set top box search To the set top box. The plurality of frequency points are frequency point data set according to a product specification of the set top box, and may be stored in an Excel table and then loaded into the modulator. The setting instruction may be a frequency setting instruction sent by the collecting device to drive a set top box remote control device (for example, an infrared remote controller, a Bluetooth remote controller, etc.), or may be used to directly operate a frequency point setting instruction generated by the set top box. .

This embodiment provides a voltage collecting device. As shown in FIG. 10, the voltage collecting device includes a processor 100 and a memory 200.

The processor 100 is adapted to implement a plurality of instructions; and the memory 200 is adapted to store a plurality of instructions adapted to be loaded by the processor 100 and to perform the voltage acquisition method as described above.

Optionally, the instructions are adapted to be loaded by the processor 100 and perform the following steps.

In step H1, the modulator voltage value is set to a preset initial voltage value and the video stream at the preset frequency point value is sent to the set top box, wherein the initial voltage value corresponds to the preset frequency point value.

In step H2, when the set top box is monitored to output the video stream, the picture of the first preset number of frames in the video stream is intercepted and saved.

In step H3, the current play state of the video stream is determined according to the picture, where the play status includes normal play and abnormal play.

In step H4, the voltage value of the modulator is adjusted and the next play state is monitored in real time, and the current play state is compared with the next play state to determine whether the play state is changed.

In step H5, if the playing state is unchanged, the step H4 is performed cyclically until the playing state is changed twice, and the two voltage values corresponding to the two changes are respectively recorded to obtain the preset frequency point. The first voltage threshold and the second voltage threshold corresponding to the value.

As shown in FIG. 11, the voltage collecting device may further include: an input device 300 and an output device 400.

The processor 100, the memory 200, the input device 300, and the output device 400 in the voltage collecting device may be connected by a bus or other means, and the bus connection is taken as an example in FIG.

The input device 300 can receive input digital or character information, and the output device 400 can include a display device such as a display screen.

The memory 200 is a computer readable storage medium that can be used to store software programs, computer executable programs, and modules. The processor 100 executes a plurality of functional applications and data processing by executing software programs, instructions, and modules stored in the memory 200 to implement any of the above embodiments.

The memory 200 may include a storage program area and an storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the electronic device, and the like. Further, the memory may include volatile memory such as random access memory (RAM), and may also include non-volatile memory such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device.

Memory 200 can be a non-transitory computer storage medium or a transitory computer storage medium. The non-transitory computer storage medium, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 200 can optionally include memory remotely located relative to the processor 100, which can be connected to the voltage collection device via a network. Examples of the above networks may include the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The input device 300 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the electronic device. The output device 400 can include a display device such as a display screen.

The implementation of all or part of the processes in the foregoing embodiment may be performed by a computer program executing related hardware, and the program may be stored in a non-transitory computer readable storage medium, and the program may include, when executed, A flow of an embodiment of the method, wherein the non-transitory computer readable storage medium is a magnetic disk, an optical disk, a read only memory (ROM), or a random access memory (RAM).

The present embodiment provides a storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform a voltage acquisition method as described above.

The functions of the above described storage medium and instructions in the voltage collection device have been described in the above methods.

Industrial applicability

Claims

A voltage collection method includes:

Setting a modulator voltage value to a preset initial voltage value and transmitting the video stream at the preset frequency point value to the set top box, wherein the initial voltage value corresponds to the preset frequency point value;

When the set top box is monitored to output the video stream, intercepting a picture of the first preset number of frames in the video stream and saving the image;

Determining, according to the picture, a current playing state of the video stream, where the playing state includes normal playing and abnormal playing;

Adjusting the voltage value of the modulator and monitoring the next playing state in real time, and comparing the current playing state with the next playing state to determine whether the playing state is changed;

If the playing state is unchanged, the voltage value of the modulator is cyclically executed and the next playing state is monitored in real time, and the current playing state and the next playing state are compared to determine whether the playing state is changed. Steps, until the playing state is changed twice and separately recording the two voltage values corresponding to the two changes to obtain a corresponding first voltage threshold and a second voltage threshold at the preset frequency value.
The voltage collecting method according to claim 1, further comprising:

When a plurality of preset frequency point values are detected, respectively acquiring initial voltage values corresponding to the plurality of preset frequency point values, and the plurality of preset frequency point values and the plurality of preset frequency points The initial voltage value corresponding to the value is introduced into the modulator;

Obtaining a first threshold voltage value and a second threshold voltage value at the plurality of preset frequency point values according to the sequence of the plurality of frequency point values.
The voltage collecting method according to claim 1, wherein the determining, according to the picture, the playing status of the video stream comprises:

Determining, according to the picture, whether the video stream is black, stuck, or has noise;

When the video stream is not black, is not stuck, and there is no noise, it is determined that the video stream playing state is normal playing;

When a black screen, a stuck or a noise occurs in the video stream, it is determined that the playing state of the video stream is a play exception.
The voltage collecting method according to claim 3, wherein the determining, according to the picture, whether the video stream is black or not comprises:

Converting the picture into a grayscale image and binarizing the grayscale image;

Counting the number of bright points in the grayscale image after binarization of the grayscale image, and comparing the number of the bright spots with a preset number threshold;

When the number of bright spots is less than the threshold number, the counter is incremented by one;

When the value of the counter is equal to the first preset number of frames, it is determined that the video stream is black.
The voltage collecting method according to claim 3, wherein said determining, according to said picture, whether said video stream is stuck comprises:

Loading the picture in a grayscale manner and reducing the size of the picture to a preset second size;

Converting the picture of the second size into a histogram and comparing the similarity between the two pictures;

When the similarity is greater than a preset value, it is determined that the video stream is stuck.
The voltage collecting method according to claim 3, wherein the determining whether the video stream has noise according to the picture comprises:

Converting the picture into a grayscale image and binarizing the grayscale image, and determining whether the binarized grayscale image has a mosaic;

Record the mosaiced picture and traverse all the images with mosaics;

When two consecutive mosaic pictures appear more than two times or three consecutive pictures have mosaics, it is determined that there is noise in the video stream.
The voltage collecting method according to claim 1, wherein when the set-top box is detected to output the video stream, intercepting a picture of the first preset number of frames in the video stream and saving comprises:

When the set-top box is monitored to output the video stream, the second preset frame number is read by a frame of a preset size and the number of intercepted frames is recorded;

When the number of intercepted frames reaches the first preset number of frames, stop capturing and saving all the pictures.
The voltage collecting method according to claim 1, wherein said adjusting said voltage value of said modulator and monitoring the next playing state in real time, and comparing said current playing state with a next playing state to determine whether said playing state is changed include:

Adjusting the voltage value of the modulator according to a preset rule and monitoring the next play state in real time;

Comparing the current play state with the next play state;

If the current playing state and the next playing state are both abnormal playback or normal playback, it is determined that the playing state does not change.
A voltage collecting device comprising:

a processor adapted to implement a plurality of instructions;

A memory adapted to store a plurality of instructions adapted to be loaded by a processor and to perform the voltage acquisition method of any of claims 1-8.
A storage medium storing computer executable instructions arranged to perform the voltage collection method of any of claims 1-8.