CN110581988B - Signal quality detection method and device, electronic equipment and storage medium - Google Patents
Signal quality detection method and device, electronic equipment and storage medium Download PDFInfo
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- CN110581988B CN110581988B CN201810580762.1A CN201810580762A CN110581988B CN 110581988 B CN110581988 B CN 110581988B CN 201810580762 A CN201810580762 A CN 201810580762A CN 110581988 B CN110581988 B CN 110581988B
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- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
The embodiment of the invention provides a signal quality detection method, a signal quality detection device, electronic equipment and a storage medium, wherein the method comprises the following steps: determining the characteristics of an input signal of a signal processing device aiming at the signal processing device to be detected; adjusting parameters of a preset template signal according to the characteristics to obtain a sample signal; inputting the sample signal into a signal processing device; receiving an output signal output by the signal processing equipment; the signal quality of the output signal is detected by comparing the sample signal with the output signal. When the signal processing equipment is detected, the image information actually shot does not need to be acquired through additional shooting equipment to be used as a sample, so that the cost is reduced, the defect of the adoption of the actual image information as the sample is avoided, and the detection result is more accurate.
Description
Technical Field
The invention relates to the technical field of security equipment, in particular to a signal quality detection method and device, electronic equipment and a storage medium.
Background
Along with the progress of the technology, more and more novel equipment is presented in the field of video monitoring so as to meet the higher and higher requirements of people on security monitoring. The signal processing device is a device that performs functions of storing and processing the acquired audio and video data or signals, and may be various hard disk video recorders, such as a network hard disk video recorder, a digital hard disk video recorder, and an audio and video processing server. The signal processing device has wide application due to better storage performance and signal processing performance.
The signal processing device can acquire image information acquired by shooting devices such as a camera and a network camera through a network or other transmission modes. The acquired image information can be saved and the saved image information can also be output, for example, the image information is output to a display through a data line and played through the display. Therefore, the image information stored in the signal processing equipment can be conveniently called and checked at any time.
When the signal processing equipment is subjected to factory detection and debugging and maintenance in the using process, the output signal of the signal processing equipment is often required to be detected, so that the signal processing equipment is ensured to be in a normal working state, and the quality of the output image information meets the requirement.
In the prior art, when a signal processing device is detected, image information of a monitoring scene actually acquired by an actual shooting device, such as a network camera, needs to be input into the signal processing device as a sample for detection, however, the quality, the fineness, and the like of the image information acquired by the actual shooting device are greatly affected by an actual environment and cannot be artificially controlled, so that when the signal processing device is detected through the actual image information, the accuracy of detection is insufficient, and a detection error may occur. Moreover, when the signal processing equipment is detected, shooting equipment is required to be matched, and the detection cost is increased.
Disclosure of Invention
Embodiments of the present invention provide a signal quality detection method, a signal quality detection device, an electronic apparatus, and a storage medium, so as to improve detection accuracy and reduce detection cost. The specific technical scheme is as follows:
the embodiment of the invention provides a signal quality detection method, which comprises the following steps:
determining characteristics of an input signal of a signal processing device to be detected for the signal processing device;
adjusting parameters of a preset template signal according to the characteristics to obtain a sample signal;
inputting the sample signal into the signal processing device;
receiving an output signal output by the signal processing device, wherein the output signal is a signal output by the signal processing device from the sample signal;
and detecting the signal quality of the output signal by comparing the sample signal with the output signal.
Optionally, the sample signal includes: a video sample signal and an audio sample signal;
the output signal includes: a video output signal and an audio output signal;
the detecting the signal quality of the output signal by comparing the sample signal with the output signal comprises:
detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal;
and detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal.
Optionally, the detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal includes:
determining whether the video output signal and the video sample signal are corresponding signals by comparing the video output signal and the video sample signal;
if the video output signal and the video sample signal are corresponding signals, determining a color cast value between the video output signal and the video sample signal, and if the color cast value is smaller than a first preset threshold value, the signal quality of the video output signal meets the requirement;
the detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal comprises:
determining a volume of the audio output signal;
determining whether the audio output signal and the audio sample signal are corresponding signals by comparing the audio output signal and the audio sample signal;
and if the audio output signal and the audio sample signal are corresponding signals, determining a deviation value between the audio output signal and the audio sample signal, and if the volume is consistent with the output volume of the signal processing equipment and the deviation value is smaller than a second preset threshold value, the signal quality of the audio output signal meets the requirement.
Optionally, the characteristics of the input signal include:
a video resolution supported by the signal processing apparatus, and a signal type supported by the signal processing apparatus;
adjusting parameters of a preset template signal according to the characteristics to obtain a sample signal, comprising:
and adjusting the resolution and the signal type of the preset template signal according to the video resolution and the signal type to obtain the sample signal.
Optionally, the characteristics of the input signal further include: the number of input channels supported by the signal processing device;
the inputting the sample signal into the signal processing apparatus includes:
dividing the sample signals into a plurality of paths of sample signals according to the number of the input channels;
and respectively inputting the multipath sample signals into the signal processing equipment through each input channel of the signal processing equipment.
Optionally, the receiving the output signal output by the signal processing device includes:
inputting a screen splitting instruction to the signal processing equipment, wherein the screen splitting instruction is used for determining the number of signals output by the signal processing equipment;
receiving a plurality of paths of output signals output by the signal processing equipment according to the screen splitting instruction;
the detecting the signal quality of the output signal by comparing the sample signal with the output signal comprises:
and respectively comparing the sample signal with each output signal in the multi-path output signals to detect the signal quality of each output signal.
Optionally, when a plurality of sample signals are input to the signal processing device through a plurality of the input channels, the method further includes:
detecting whether crosstalk exists between the sample signals of the plurality of paths of the plurality of input channels.
Optionally, the signal processing device is a hard disk video recorder.
An embodiment of the present invention further provides a signal quality detection apparatus, including:
the device comprises an acquisition module, a detection module and a processing module, wherein the acquisition module is used for determining the characteristics of an input signal of signal processing equipment to be detected aiming at the signal processing equipment;
the signal generation module is used for adjusting the parameters of the preset template signal according to the characteristics to obtain a sample signal;
the signal transmitting module is used for inputting the sample signal into the signal processing equipment;
the signal receiving module is used for receiving an output signal output by the signal processing equipment, wherein the output signal is a signal output by the signal processing equipment from the sample signal;
and the signal comparison module is used for detecting the signal quality of the output signal by comparing the sample signal with the output signal.
Optionally, the sample signal in the apparatus includes: a video sample signal and an audio sample signal;
the output signal in the apparatus comprises: a video output signal and an audio output signal;
the signal comparison module is specifically configured to:
detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal; and detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal.
Optionally, the signal comparison module is specifically configured to:
determining whether the video output signal and the video sample signal are corresponding signals by comparing the video output signal and the video sample signal; if the video output signal and the video sample signal are corresponding signals, determining a color cast value between the video output signal and the video sample signal, and if the color cast value is smaller than a first preset threshold value, the signal quality of the video output signal meets the requirement;
determining a volume of the audio output signal; determining whether the audio output signal and the audio sample signal are corresponding signals by comparing the audio output signal and the audio sample signal; and if the audio output signal and the audio sample signal are corresponding signals, determining a deviation value between the audio output signal and the audio sample signal, and if the volume is consistent with the output volume of the signal processing equipment and the deviation value is smaller than a second preset threshold value, the signal quality of the audio output signal meets the requirement.
Optionally, the characteristics of the input signal in the apparatus include: a video resolution supported by the signal processing apparatus, and a signal type supported by the signal processing apparatus;
the signal generation module is specifically configured to:
and adjusting the resolution and the signal type of the preset template signal according to the video resolution and the signal type to obtain the sample signal.
Optionally, the characteristics of the input signal in the apparatus further include: the number of input channels supported by the signal processing device;
the signal transmitting module is specifically configured to:
dividing the sample signals into a plurality of paths of sample signals according to the number of the input channels;
and respectively inputting the multipath sample signals into the signal processing equipment through each input channel of the signal processing equipment.
Optionally, the signal receiving module is specifically configured to:
inputting a screen splitting instruction to the signal processing equipment, wherein the screen splitting instruction is used for determining the number of signals output by the signal processing equipment; receiving a plurality of paths of output signals output by the signal processing equipment according to the screen splitting instruction;
the signal comparison module is specifically configured to:
and respectively comparing the sample signal with each output signal in the multi-path output signals to detect the signal quality of each output signal.
Optionally, when a plurality of sample signals are input to the signal processing device through a plurality of the input channels, the apparatus further includes:
and the crosstalk detection module is used for detecting whether crosstalk exists among the multipath sample signals of the plurality of input channels.
Optionally, the signal processing device is a hard disk video recorder.
The embodiment of the invention also provides electronic equipment which comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
a memory for storing a computer program;
and a processor for implementing any of the above-described signal quality detection methods when executing the program stored in the memory.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements any of the signal quality detection methods described above.
Embodiments of the present invention also provide a computer program product containing instructions, which when run on a computer, cause the computer to perform any of the above-mentioned signal quality detection methods.
The signal quality detection method, the signal quality detection device, the electronic equipment and the storage medium provided by the embodiment of the invention can determine the characteristics of the input signal of the signal processing equipment aiming at the signal processing equipment to be detected; and adjusting the parameters of the preset template signal according to the characteristics to obtain a sample signal, inputting the sample signal into the signal processing equipment, and then receiving an output signal output by the signal processing equipment. The signal quality of the output signal of the signal processing device is detected by comparing the sample signal with the output signal. When the signal processing equipment is detected, the actually shot image information does not need to be obtained through additional shooting equipment to serve as a sample, and therefore cost is reduced. In the embodiment of the invention, the required sample signal is generated directly according to the characteristics of the input signal of the signal processing equipment to be detected, and the sample signal is used for detecting the signal processing equipment, so that the defects of using actual image information as a sample are avoided, and the detection result is more accurate. Of course, it is not necessary for any product or method of practicing the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a signal quality detection method according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a default template signal according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a multiplexed output signal provided by an embodiment of the present invention;
fig. 4 is a structural diagram of a signal quality detection apparatus according to an embodiment of the present invention;
fig. 5 is a structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a signal quality detection method according to an embodiment of the present invention, including:
The embodiment of the present invention can be applied to an electronic device with data processing capability, such as a notebook computer, a computer, and the like, and the electronic device can execute each step of the signal quality detection method provided by the embodiment of the present invention in a software, hardware, or a combination of software and hardware, thereby detecting the signal quality of the signal processing device to be detected.
The signal processing device may include various devices such as a hard disk video recorder and an audio/video processing server. In the embodiment of the present invention, a hard disk recorder is mainly taken as an example for description, that is, in the embodiment of the present invention, the signal processing device may be understood as a hard disk recorder. Of course, those skilled in the art can apply the signal quality detection method provided by the embodiment of the present invention to other devices having the same or similar functions as the hard disk video recorder.
Specifically, the hard disk Recorder may include multiple forms of hard disk recorders such as a Network Video Recorder (NVR) and a Digital Video Recorder (DVR).
Signal processing devices have input signals that are of a number of different types or models, and the characteristics of the input signals that can be supported by the different types or models of signal processing devices may differ. The characteristics of the input signal may include many aspects, for example, the characteristics of the input signal may include the signal type of the input that the signal processing device is capable of supporting, the strength of the signal, the resolution of the video signal, the frame rate of the video signal, the format of the audio signal, and so on.
The electronic device may obtain the characteristics of the input signal of the signal processing device in various ways, for example, by means of human input; the characteristics of the input signal can also be automatically obtained through the electronic device through interaction with the signal processing device, for example, a communication module is added in the signal processing device, the electronic device is connected with and interacts with the communication module through a network or a data line, the characteristics of the input signal of the signal processing device can be stored in the communication module, and the electronic device obtains the characteristics of the input signal of the signal processing device through data interaction. Or, the electronic device may obtain the identifier such as the model or the hardware identification code of the signal processing device through interaction with the signal processing device. The characteristics of the input signal of the signal processing device are then obtained by means of a look-up table, or by means of a query in a database.
By automatically acquiring the signal parameters, the automation degree of the signal quality detection method provided by the embodiment of the invention can be further improved, so that the detection efficiency is improved.
And 102, adjusting parameters of a preset template signal according to the characteristics of the input signal of the signal processing equipment to obtain a sample signal.
In the electronic device, a preset template signal may be preset, and the preset template signal may be one or more signals of a standard specially used for signal quality detection of the signal processing device.
The preset template signal may be of various types, so that different aspects of the hard disk video can be detected, for example, when detecting whether there are problems of image color cast, snowflake, video signal, image distortion, etc. in the video signal output by the hard disk video, the preset template signal may be an image in the form of a color palette as shown in fig. 2.
Each of the bar-shaped regions in fig. 2 has a different color, and the preset template signal may be image information having a plurality of colors. With the multi-color image, it can be better detected whether the signal processing device can perform corresponding processing for various colors in the subsequent steps without color deviation. In the prior art, it is difficult to obtain a large number of images with different colors in an actual scene, so that more accurate detection of the signal processing device cannot be performed.
When detecting whether the video signal output by the signal processing device has noise and other problems, the preset template signal may be an image of pure red or pure blue and other colors.
When detecting an audio signal output from the signal processing device, the preset template signal may be a signal of audio.
Of course, the preset template signal may take into account various parameters such as color, pattern, resolution, and the like, so as to obtain image information and sound information that cannot be obtained in an actual scene. More accurate detection of the signal processing equipment can be realized.
The electronic device may store a plurality of preset template signals, which may be called as needed, for example, the electronic device at least includes a preset video template signal for video signal detection and a preset audio template signal for audio detection.
After the electronic device determines the characteristics of the input signal of the signal processing device, each parameter of the preset template signal may be adjusted according to the characteristics of the input signal, for example, the type of the preset template signal is converted, so that the preset template signal is converted into the type of the signal that can be input by the signal processing device.
Through adjusting each parameter of the preset template signal, the preset template signal can be converted into a signal which can be supported by the signal processing equipment, and the adjusted preset template signal is used as a sample signal.
The sample signal, which may contain image information and audio information, can be transmitted by various means such as a cable, a data bus, or a network cable.
When the sample signal is generated, the electronic device may input the sample signal to the signal processing device to be detected through the input channel of the signal processing device. The sample signal can be transmitted by a code stream mode, and can be transmitted by other modes such as an analog or digital signal.
For example, for an NVR hard disk recorder, the sample signal may be sent to the NVR hard disk recorder over a network. The sample signals can be transmitted to the NVR through a network interface in the form of video code streams. The sample signal can be transmitted to the DVR hard disk video recorder through a video audio line or other data lines.
After the signal processing device acquires the sample signal, the input sample signal may be processed according to normal processing logic, for example, the processes of encoding compression, format conversion, storage, and the like may be performed.
The signal processing device can output the processed sample signal through an output channel. The output signal is a signal which can be directly displayed or played by a display device such as a display or an audio playing device. For example, the Signal processing apparatus may output the processed sample Signal as an output Signal through a VGA Interface (Video Graphics Array), a High Definition Multimedia Interface (HDMI), a Composite Video Broadcast Signal (CVBS) Interface, or the like.
And 104, receiving an output signal output by the signal processing equipment, wherein the output signal is a signal output by the signal processing equipment from the sample signal.
The electronic device may receive the output signal output by the signal processing device, for example, the output signal of the signal processing device may be directly accessed through a VGA interface or an HDMI interface. Also, since the signal processing apparatus may have a plurality of output channels, for example, the signal processing apparatus may have a plurality of HDMI interfaces at the same time, output signals of the plurality of output channels may be accessed at the same time.
In addition, the output signal output by the signal processing equipment can be connected to display equipment such as a display, so that related personnel can directly observe the output signal in the detection process.
After the electronic device obtains the output signal, the obtained output signal can be compared with the originally generated sample signal. Therefore, the signal quality of the output signal can be judged according to the similarity degree of the output signal and the sample signal. For example, when the error of the similarity between the output signal and the sample signal can be within a preset range, it indicates that the quality of the output signal is satisfactory.
By obtaining the sample signal and comparing the sample signal, various image quality results such as image color cast, snowflake, video signal, image distortion, noise and the like can be judged. For example, by determining whether the output signal can be received, the presence or absence of a video signal can be determined; whether color cast exists can be judged by comparing the colors of the sample signal and the output signal; by comparing the images of the sample signal and the output signal, whether snowflakes, image distortion, noise points and the like exist can be judged.
The comparison and judgment process can be automatically executed by electronic equipment in a software, hardware or software and hardware combination mode, the comparison and judgment process does not need related personnel to operate, and the electronic equipment can directly record and output the comparison result. For example, the parameter values of the color cast, the presence or absence of data or information such as snowflakes, distortion, etc., are recorded in a database and transmitted to the relevant person through a preset program. Thereby enabling automatic detection of the signal processing device.
In the embodiment of the invention, the characteristics of the input signal of the signal processing equipment are determined aiming at the signal processing equipment to be detected; and adjusting the parameters of the preset template signal according to the characteristics to obtain a sample signal, inputting the sample signal into the signal processing equipment, and then receiving an output signal output by the signal processing equipment. The signal quality of the output signal of the signal processing device is detected by comparing the sample signal with the output signal. When the signal processing equipment is detected, the actually shot image information does not need to be obtained through additional shooting equipment to serve as a sample, and therefore cost is reduced. In the embodiment of the invention, the required sample signal is generated directly according to the characteristics of the input signal of the signal processing equipment to be detected, and the sample signal is used for detecting the signal processing equipment, so that the defects of actual image information serving as a sample are avoided, and the detection result is more accurate. In addition, the detection process can be automatically carried out without manual intervention, so that the monitoring efficiency of the signal processing equipment can be improved, and the human resources are saved.
With reference to the above embodiments, in the signal quality detection method provided by the embodiments of the present invention, the sample signal may include: a video sample signal and an audio sample signal.
Also, the output signal may include: a video output signal and an audio output signal.
In order to further detect the output signal of the signal processing device, the detection may be performed separately for the video and audio output by the signal processing device. Therefore, when the sample signal is generated, the preset video template signal in the preset template signal can be respectively adjusted according to the characteristics of the input signal of the signal processing equipment to obtain the video sample signal; and adjusting the preset audio template signal in the preset template signal to generate an audio sample signal.
The video sample signal contains information of a video image, which can be obtained by adjusting various parameters such as color, pattern, resolution, and the like, and is the most suitable video sample signal for the signal processing apparatus.
The audio sample signal may contain audio information, for example, the audio signal may be obtained by superimposing a plurality of sine waves, and by controlling parameters related to the sine waves, a suitable audio sample signal can be obtained.
In the embodiment of the present invention, the input channels corresponding to the video sample signal and the audio sample signal respectively may be input into the signal processing device to be detected, and the signal processing device may process the video sample signal and the audio sample signal according to a normal processing logic or processing flow.
The processed video sample signal and audio sample signal can be output as a video output signal and an audio output signal, respectively. When the output is performed, the video output signal and the audio output signal can be output through the corresponding output channels.
Accordingly, in the signal quality detecting method provided in the embodiment of the present invention, the step 105 of detecting the signal quality of the output signal by comparing the sample signal with the output signal may include:
step 105a, detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal.
Step 105b, detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal.
The detection may be performed separately for the video output signal and the audio output signal. The electronic device may obtain the video output signal and the audio output signal output by the signal processing device, respectively, and then compare the video output signal and the audio output signal with the video sample signal and the audio sample signal generated by the electronic device, respectively.
Through comparing respectively, can detect the signal quality of video output signal and audio output signal respectively for signal processing equipment's signal detection is more comprehensive.
Specifically, the step 105a of detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal may include:
the first step is to determine whether the video output signal and the video sample signal are corresponding signals by comparing the video output signal and the video sample signal.
The video output signal is a signal output by the signal processing apparatus based on the video sample signal, and should be substantially identical to the original video signal in terms of the structure, type, etc. of the image without major changes, and thus can be regarded as a corresponding signal.
The video output signal does not correspond to the sample video signal if an image of the video output signal is distorted or distorted, snowflakes appear in the image, or no image is present.
If the video output signal and the video sample signal are not corresponding signals, it indicates that a fault may occur inside the signal processing device, which causes an abnormality in the video output signal, and subsequent detection is not necessary, and the signal abnormality of the signal processing device to be detected can be directly determined.
And secondly, if the video output signal and the video sample signal are corresponding signals, determining a color cast value between the video output signal and the video sample signal, and if the color cast value is smaller than a first preset threshold value, the signal quality of the video output signal meets the requirement.
If the video output signal and the video sample signal are corresponding signals, a color cast value between the video output signal and the video sample signal can be continuously determined, wherein the color cast value refers to the deviation degree of the color of the image in the video output signal and the color of the image in the video sample signal, and the lower the color cast value is, the closer the video output signal is to the color of the video sample signal is, so that the quality of the video output signal is higher. Therefore, if the color cast value is smaller than the first preset threshold, the signal quality of the video output signal meets the requirement. The first preset threshold may be set as needed, and is not limited herein.
Also, in the embodiment of the present invention, when step 105a is executed, the signal type of the video output signal may also be determined. Since the electronic device can input sample Video signals of a plurality of signal types to the signal processing device, for example, a plurality of signal types such as AHD (Analog High Definition Interface), TVI (Transfer Video Interface), CVI (Composite Video Interface), CVBS, and the like. So that the video output signal can also be of a number of different signal types. The different signal types may have different first preset thresholds. Therefore, the signal type of the video output signal is determined, the color difference value can be compared by adopting the corresponding first preset threshold value, and the signal type and the obtained color cast value are used as a comparison result to be stored or output.
Also, in the embodiment of the present invention, the step 105b of detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal may include:
in a first step, the volume of the audio output signal is determined. In detecting the audio output signal, first, the volume of the audio output signal actually output may be detected. And, by comparing the actually detected volume with the output volume set on the signal processing apparatus, it can be determined whether the control and processing functions of the signal processing apparatus for the volume of the audio are normal.
And secondly, determining whether the audio output signal and the audio sample signal are corresponding signals by comparing the audio output signal and the audio sample signal.
Similar to the video output signal, the audio output signal is obtained by processing the audio sample signal, and audio distortion and deformation, such as phase change or missing of a sine wave constituting the audio, should not occur. The audio output signal may be considered too different from the audio sample signal to be the corresponding signal. Therefore, it is possible to directly determine the occurrence of a failure of the signal processing apparatus without performing the subsequent steps.
And thirdly, if the audio output signal and the audio sample signal are corresponding signals, determining a deviation value between the audio output signal and the audio sample signal, and if the volume is consistent with the output volume of the signal processing equipment and the deviation value is smaller than a second preset threshold value, the signal quality of the audio output signal meets the requirement.
If the audio output signal and the audio sample signal are corresponding signals, a deviation value between the audio output signal and the audio sample signal can be continuously determined, and the deviation value can reflect the difference degree between the two signals. When the deviation value is smaller, it means that the two signals are closer, and thus the signal quality of the audio output signal is higher. Therefore, when the deviation value is smaller than the second preset threshold value and the detected actual volume corresponds to the set output volume of the signal processing device, it indicates that the signal quality of the audio output signal meets the requirement.
In the embodiment of the invention, whether the video output and the audio output of the signal processing equipment have faults can be detected more accurately by respectively detecting the video output signal and the audio output signal. The detection precision of the signal processing equipment can be further improved by setting parameters such as the first preset threshold value, the second preset threshold value and the like, and the detection standard can be flexibly adjusted by adjusting the parameters, so that the detection process is more flexible.
In combination with the above embodiments, in order to be able to generate a sample signal more suitable for the signal processing device to be detected, thereby further improving the detection effect. In the signal quality detection method provided by the embodiment of the present invention, the characteristics of the input signal of the signal processing device may include: the video resolution supported by the signal processing device, and the signal type supported by the signal processing device.
Correspondingly, step 102, adjusting parameters of the preset template signal according to characteristics of the input signal to obtain a sample signal, may include:
and adjusting the resolution and the signal type of the preset template signal according to the video resolution and the signal type to obtain a sample signal.
In practical applications, there may be multiple specifications or types of signal processing devices, and the functions and processing performances supported by the signal processing devices of different specifications or types are different. The most different of which is the video resolution that can be supported and the type of signal that can be supported by different signal processing devices. Therefore, the aim is to perform targeted detection on signal processing equipment with different specifications or types. The characteristics of the input signal of the signal processing device acquired by the electronic device may include video resolution that can be supported by the signal processing device and signal types that can be supported by the signal processing device. The signal types may include: AHD, TVI, CVI, CVBS, etc.
After obtaining the characteristics of the input signal, the electronic device may adjust the resolution and the signal type of the preset template signal according to the characteristics of the input signal.
Specifically, the signal type of the preset template signal may be first converted into a type corresponding to the signal type in the features of the input signal; the resolution of the preset template signal is then adjusted according to the video resolution in the features of the input signal. The adjusted sample signal can thus be adapted to the video resolution in the characteristics of the input signal, as well as to the type of signal.
The obtained sample signal can be directly input into the signal processing device, and the signal processing device can directly carry out normal processing on the sample signal. The detection error caused by the fact that the signal type of the sample signal cannot be supported is avoided, and the wrong detection result caused by the fact that the resolution ratio is not supported is also avoided.
In combination with the above embodiments, in order to more comprehensively detect the signal processing device, the detection effect is further improved. In the signal quality detection method provided by the embodiment of the present invention, the characteristics of the input signal of the signal processing device may include: the number of input channels supported by the signal processing device. The number of input channels is the number of paths of signals which can be simultaneously input into the signal processing device.
Accordingly, step 103, inputting the sample signal into the signal processing device, may include:
step 103a, dividing the sample signal into multiple paths of sample signals according to the number of input channels.
In the embodiment of the present invention, in order to be able to detect the signal input by each input channel of the signal processing device, the number of input channels that can be supported by the signal processing device may be used. The sample signal is divided into as many multipath signals as the number of input channels.
Specifically, the division of the sample signal into multiple paths may be implemented by a device such as a screen splitter, for example, a screen splitter is installed inside the electronic device, so that the generated sample signal may be copied into multiple paths of sample signals. The resulting multiplexed sample signal is identical to the original sample signal.
And 103b, respectively inputting the multipath sample signals into the signal processing equipment through each input channel of the signal processing equipment.
In practical application, the signal processing device can receive signals from a plurality of shooting devices through a plurality of input channels simultaneously and respectively perform processing such as storage. Therefore, in order to comprehensively detect the signal processing device, the generated multi-path sample signals can be input into the signal processing device through the input channels respectively. And enabling the signal processing device to respectively process the signals received by each input channel and respectively output the signals.
After the signal processing device inputs the multiple paths of sample signals, the signal processing device can correspondingly generate multiple paths of output signals after processing.
Therefore, in the signal quality detection method provided by the embodiment of the present invention, step 104, receiving the output signal output by the signal processing device, may include:
and 104a, inputting a screen splitting instruction to the signal processing equipment, wherein the screen splitting instruction is used for determining the number of signals output by the signal processing equipment.
The signal processing device can have more input channels and can input multiple sample signals simultaneously. However, the number of output signals may be determined by a screen division instruction when outputting the corresponding output signals. For example, the input channel of the signal processing device is 16, and 16 sample signals can be received simultaneously. Then, the screen splitting instruction can determine how many output signals are output simultaneously, for example, when 2 screens are split, two output signals can be output. When the screen is divided into 9 screens, 9 output signals can be output.
Therefore, when the signal processing device is detected, a screen splitting instruction needs to be input to the signal processing device, so as to control the number of output signals of the signal processing device.
Particularly, in some cases, the signal processing apparatus cannot output all of the input signals at the same time. Therefore, all output signals can be detected in batches through the split-screen instruction, for example, when 16 sample signals are input, 8 output signals are detected for the first time and the remaining 8 output signals are detected for the second time through the split-screen instruction of 8 split-screens, so that all output signals are detected.
And 104b, receiving a plurality of output signals output by the signal processing equipment according to the screen splitting instruction.
When the signal processing device outputs the output signals according to the screen splitting instruction, the electronic device can receive the multiple output signals respectively. As shown in fig. 3, fig. 3 is a schematic diagram of 9 received output signals when the signal processing device 9 is split. Wherein a 1-a 9 are images of each output signal respectively.
Accordingly, step 105, detecting the signal quality of the output signal by comparing the sample signal with the output signal, may include:
and respectively comparing the sample signal with each output signal in the multi-path output signals to detect the signal quality of each output signal.
Because each path of sample signal processing equipment input to the signal processing equipment can independently perform corresponding processing, each path of corresponding output signal needs to be independently detected, and therefore, the condition that each path of signal processing of the hard disk video recorder has no fault is ensured.
Therefore, the received output signal of each channel needs to be compared with the sample signal. That is, the output video signal and the output audio signal in each output signal need to be compared with the video sample signal and the audio sample signal, respectively. The specific comparison method is the same as that described in the previous embodiment, and is not repeated herein. In the embodiment of the invention, the detection of the signal processing equipment is more comprehensive and complete by detecting the multi-path output signals, and the detection effect is further improved.
In connection with the above embodiments, since the signal processing device may have a plurality of input channels, each input channel may be an independent physical interface. When a signal processing device fails, crosstalk may occur between the respective interfaces.
Therefore, when inputting multiple paths of sample signals to the signal processing device through multiple input channels, the signal quality detection method provided by the embodiment of the invention further includes:
and 106, detecting whether crosstalk exists among the multipath sample signals of the multiple input channels.
The crosstalk is detected, that is, whether one input channel interferes with another input channel is detected, and when one input channel does not transmit, whether a sample signal input by an adjacent input channel affects the input channel is detected.
Specifically, the detection modes for the video sample signal and the audio sample signal are slightly different.
For the video sample signals, the output channel corresponding to each input channel is connected in the display device, so that one input channel does not transmit the corresponding video sample signal, and the video sample signal is transmitted in the adjacent input channel. In the display device, if the output channel corresponding to the input channel which does not transmit the video sample signal does not generate a corresponding image, and the output channel corresponding to the input channel which transmits the video sample signal generates a corresponding image, it indicates that there is no crosstalk. Otherwise, it indicates that crosstalk exists.
For the audio sample signal, the audio sample signal is input into one of the input channels of the multiple audios, and whether the audio sample signal is output due to sound in the output channel corresponding to each input channel is detected. If the sound can be detected in the output channel corresponding to the input channel of the input audio sample signal, and the sound cannot be detected in the adjacent output channel, the crosstalk does not exist between the input channels, otherwise, the crosstalk exists.
In the embodiment of the invention, the detection of the signal processing equipment is further perfected by detecting the crosstalk of the input channel, and the detection effect is improved.
Referring to fig. 4, fig. 4 is a structural diagram of a signal quality detecting apparatus according to an embodiment of the present invention, including:
an obtaining module 401, configured to determine, for a signal processing device to be detected, characteristics of an input signal of the signal processing device;
a signal generating module 402, configured to adjust parameters of a preset template signal according to the characteristics to obtain a sample signal;
a signal transmitting module 403, configured to input the sample signal into the signal processing apparatus;
a signal receiving module 404, configured to receive an output signal output by the signal processing apparatus, where the output signal is a signal output by the signal processing apparatus from the sample signal;
a signal comparison module 405, configured to detect the signal quality of the output signal by comparing the sample signal with the output signal.
In the embodiment of the invention, the characteristics of the input signal of the signal processing equipment are determined aiming at the signal processing equipment to be detected; and adjusting the parameters of the preset template signal according to the characteristics to obtain a sample signal, inputting the sample signal into the signal processing equipment, and then receiving an output signal output by the signal processing equipment. The signal quality of the output signal of the signal processing device is detected by comparing the sample signal with the output signal. When the signal processing equipment is detected, the actually shot image information does not need to be obtained through additional shooting equipment to serve as a sample, and therefore cost is reduced. In the embodiment of the invention, the required sample signal is generated directly according to the characteristics of the input signal of the signal processing equipment to be detected, and the sample signal is used for detecting the signal processing equipment, so that the defects of actual image information are avoided, and the detection result is more accurate. In addition, the detection process can be automatically carried out without manual intervention, so that the monitoring efficiency of the signal processing equipment can be improved, and the human resources are saved.
Optionally, in the signal quality detection apparatus provided in the embodiment of the present invention, the sample signal in the apparatus includes: a video sample signal and an audio sample signal;
the output signal in the apparatus comprises: a video output signal and an audio output signal;
the signal comparison 405 module is specifically configured to:
detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal; and detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal.
Optionally, in the signal quality detection apparatus provided in the embodiment of the present invention, the signal comparison module 405 is specifically configured to:
determining whether the video output signal and the video sample signal are corresponding signals by comparing the video output signal and the video sample signal; if the video output signal and the video sample signal are corresponding signals, determining a color cast value between the video output signal and the video sample signal, and if the color cast value is smaller than a first preset threshold value, the signal quality of the video output signal meets the requirement;
determining a volume of the audio output signal; determining whether the audio output signal and the audio sample signal are corresponding signals by comparing the audio output signal and the audio sample signal; and if the audio output signal and the audio sample signal are corresponding signals, determining a deviation value between the audio output signal and the audio sample signal, and if the volume is consistent with the output volume of the signal processing equipment and the deviation value is smaller than a second preset threshold value, the signal quality of the audio output signal meets the requirement.
Optionally, in the signal quality detection apparatus provided in the embodiment of the present invention, the characteristics of the input signal include: a video resolution supported by the signal processing apparatus, and a signal type supported by the signal processing apparatus;
the signal generating module 402 is specifically configured to:
and adjusting the resolution and the signal type of the preset template signal according to the video resolution and the signal type to obtain the sample signal.
Optionally, in the signal quality detection apparatus provided in the embodiment of the present invention, the characteristics of the input signal in the apparatus further include: the number of input channels supported by the signal processing device;
the signal transmitting module 403 is specifically configured to:
dividing the sample signals into a plurality of paths of sample signals according to the number of the input channels; and respectively inputting the multipath sample signals into the signal processing equipment through each input channel of the signal processing equipment.
Optionally, in the signal quality detection apparatus provided in the embodiment of the present invention, the signal receiving module 404 is specifically configured to:
inputting a screen splitting instruction to the signal processing equipment, wherein the screen splitting instruction is used for determining the number of signals output by the signal processing equipment; receiving a plurality of paths of output signals output by the signal processing equipment according to the screen splitting instruction;
the signal comparison module 405 is specifically configured to:
and respectively comparing the sample signal with each output signal in the multi-path output signals to detect the signal quality of each output signal.
Optionally, in the signal quality detection apparatus provided in the embodiment of the present invention, when a plurality of sample signals are input to the signal processing device through a plurality of the input channels, the apparatus further includes:
and the crosstalk detection module is used for detecting whether crosstalk exists among the multipath sample signals of the plurality of input channels.
Optionally, in the signal quality detection apparatus provided in the embodiment of the present invention, the signal processing device is a hard disk video recorder.
An embodiment of the present invention further provides an electronic device, as shown in fig. 5, which includes a processor 501, a communication interface 502, a memory 503 and a communication bus 504, where the processor 501, the communication interface 502 and the memory 503 complete mutual communication through the communication bus 504,
a memory 503 for storing a computer program;
the processor 501, when executing the program stored in the memory 503, implements the following steps:
determining characteristics of an input signal of a signal processing device to be detected for the signal processing device;
adjusting parameters of a preset template signal according to the characteristics to obtain a sample signal;
inputting the sample signal into the signal processing device;
receiving an output signal output by the signal processing device, wherein the output signal is a signal output by the signal processing device from the sample signal;
and detecting the signal quality of the output signal by comparing the sample signal with the output signal.
The communication bus mentioned in the electronic device may be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a RAM (Random Access Memory) or an NVM (Non-Volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
In yet another embodiment of the present invention, a computer-readable storage medium is further provided, which stores instructions that, when executed on a computer, cause the computer to execute the signal quality detection method described in any of the above embodiments.
In yet another embodiment, a computer program product containing instructions is provided, which when run on a computer causes the computer to perform the signal quality detection method of any of the above embodiments.
As for the embodiments of the signal quality detection apparatus, the computer-readable storage medium and the computer program product, since the contents of the related methods are substantially similar to the foregoing method embodiments, the description is relatively simple, and the related points can be referred to the partial description of the method embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (14)
1. A signal quality detection method, comprising:
determining the characteristics of an input signal of a signal processing device to be detected, wherein the characteristics of the input signal comprise video resolution supported by the signal processing device, signal types supported by the signal processing device and the number of input channels supported by the signal processing device;
adjusting the resolution and the signal type of a preset template signal according to the video resolution and the signal type to obtain a sample signal;
dividing the sample signals into a plurality of paths of sample signals according to the number of the input channels;
respectively inputting the multipath sample signals into the signal processing equipment through each input channel of the signal processing equipment;
receiving an output signal output by the signal processing device, wherein the output signal is a signal output by the signal processing device from the sample signal;
and detecting the signal quality of the output signal by comparing the sample signal with the output signal.
2. The method of claim 1, wherein the sample signal comprises: a video sample signal and an audio sample signal;
the output signal includes: a video output signal and an audio output signal;
the detecting the signal quality of the output signal by comparing the sample signal with the output signal comprises:
detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal;
and detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal.
3. The method of claim 2, wherein the detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal comprises:
determining whether the video output signal and the video sample signal are corresponding signals by comparing the video output signal and the video sample signal;
if the video output signal and the video sample signal are corresponding signals, determining a color cast value between the video output signal and the video sample signal, and if the color cast value is smaller than a first preset threshold value, the signal quality of the video output signal meets the requirement;
the detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal comprises:
determining a volume of the audio output signal;
determining whether the audio output signal and the audio sample signal are corresponding signals by comparing the audio output signal and the audio sample signal;
and if the audio output signal and the audio sample signal are corresponding signals, determining a deviation value between the audio output signal and the audio sample signal, and if the volume is consistent with the output volume of the signal processing equipment and the deviation value is smaller than a second preset threshold value, the signal quality of the audio output signal meets the requirement.
4. The method of claim 1, wherein said receiving the output signal output by the signal processing device comprises:
inputting a screen splitting instruction to the signal processing equipment, wherein the screen splitting instruction is used for determining the number of signals output by the signal processing equipment;
receiving a plurality of paths of output signals output by the signal processing equipment according to the screen splitting instruction;
the detecting the signal quality of the output signal by comparing the sample signal with the output signal comprises:
and respectively comparing the sample signal with each output signal in the multi-path output signals to detect the signal quality of each output signal.
5. The method according to claim 1, wherein when inputting a plurality of sample signals to the signal processing apparatus through a plurality of the input channels, the method further comprises:
detecting whether crosstalk exists between the sample signals of the plurality of paths of the input channels.
6. The method of claim 1, wherein the signal processing device is a hard disk video recorder.
7. A signal quality detection apparatus, comprising:
an obtaining module, configured to determine, for a signal processing device to be detected, characteristics of an input signal of the signal processing device, where the characteristics of the input signal include a video resolution supported by the signal processing device, a signal type supported by the signal processing device, and a number of input channels supported by the signal processing device;
the signal generation module is used for adjusting the resolution and the signal type of a preset template signal according to the video resolution and the signal type to obtain a sample signal;
the signal transmitting module is used for dividing the sample signals into a plurality of paths of sample signals according to the number of the input channels; respectively inputting the multipath sample signals into the signal processing equipment through each input channel of the signal processing equipment;
the signal receiving module is used for receiving an output signal output by the signal processing equipment, wherein the output signal is a signal output by the signal processing equipment from the sample signal;
and the signal comparison module is used for detecting the signal quality of the output signal by comparing the sample signal with the output signal.
8. The apparatus of claim 7, wherein the sample signal in the apparatus comprises: a video sample signal and an audio sample signal;
the output signal in the apparatus comprises: a video output signal and an audio output signal;
the signal comparison module is specifically configured to:
detecting the signal quality of the video output signal by comparing the video sample signal with the video output signal; and detecting the signal quality of the audio output signal by comparing the audio sample signal with the audio output signal.
9. The apparatus of claim 8, wherein the signal comparison module is specifically configured to:
determining whether the video output signal and the video sample signal are corresponding signals by comparing the video output signal and the video sample signal; if the video output signal and the video sample signal are corresponding signals, determining a color cast value between the video output signal and the video sample signal, and if the color cast value is smaller than a first preset threshold value, the signal quality of the video output signal meets the requirement;
determining a volume of the audio output signal; determining whether the audio output signal and the audio sample signal are corresponding signals by comparing the audio output signal and the audio sample signal; and if the audio output signal and the audio sample signal are corresponding signals, determining a deviation value between the audio output signal and the audio sample signal, and if the volume is consistent with the output volume of the signal processing equipment and the deviation value is smaller than a second preset threshold value, the signal quality of the audio output signal meets the requirement.
10. The apparatus of claim 7, wherein the signal receiving module is specifically configured to:
inputting a screen splitting instruction to the signal processing equipment, wherein the screen splitting instruction is used for determining the number of signals output by the signal processing equipment; receiving a plurality of paths of output signals output by the signal processing equipment according to the screen splitting instruction;
the signal comparison module is specifically configured to:
and respectively comparing the sample signal with each output signal in the multi-path output signals to detect the signal quality of each output signal.
11. The apparatus of claim 7, wherein when a plurality of sample signals are input to the signal processing device through a plurality of the input channels, the apparatus further comprises:
and the crosstalk detection module is used for detecting whether crosstalk exists among the multipath sample signals of the plurality of input channels.
12. The apparatus of claim 7, wherein the signal processing device is a hard disk video recorder.
13. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of claims 1-6 when executing a program stored in the memory.
14. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of claims 1 to 6.
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