Portable device video signal analysis system and method based on multi-protocol interface

Abstract

The application discloses a portable device video signal analysis system and method based on a multi-protocol interface, relates to the technical field of video signal protocol conversion management, and is characterized in that the application analyzes the differences in conversion conditions and the deviations in conversion time length by means of protocol conversion records generated by a portable device with a multi-protocol interface under different protocol conversion modes, and evaluates the performance stability of the portable device in the process of executing video signal protocol conversion by means of finding other historical protocol conversion execution records that can verify the change of conversion time length and conform to the working performance law of the portable device, so that potential problems existing in the process of executing protocol conversion by the portable device can be found and solved in time, the stability and reliability of video signal transmission processing are improved, and the risk of transmission conversion collapse or abnormality is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of video signal protocol conversion management, in particular to a portable device video signal analysis system and method based on a multi-protocol interface. BACKGROUND

[0002] A portable device with a multi-protocol interface refers to a device that is easy to carry between use locations, supports multiple network communication protocols, can achieve seamless connection with different operating systems and devices, and ensures the stability and reliability of data transmission. It usually has the characteristics of small size, easy operation, and easy portability. In addition to laptops, portable devices with multi-protocol interfaces also include other types of devices such as all-in-one computers, which also have multi-protocol interfaces and belong to the category of portable computers.

[0003] Portable devices with multi-protocol interfaces are often compatible with multiple video sources and are not limited by device type or brand. They can also process video data in real time, providing flexibility, compatibility, and intelligence.

[0004] Because the portable device often needs to communicate with multiple different systems and services in the actual working environment, performance monitoring can ensure the compatibility and interoperability of the device under different protocols, prevent data loss, errors, or inconsistencies, and ensure the normal operation of the system. Through performance monitoring, potential problems in converting video signals under different protocols can be discovered and solved in a timely manner, improving the stability and reliability of video signal transmission and processing, which helps to reduce the risk of system crashes or abnormal behavior and ensures stable operation of the system in various environments. SUMMARY

[0005] The present application aims to provide a portable device video signal analysis system and method based on a multi-protocol interface to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a portable device video signal analysis method based on a multi-protocol interface, the method comprising:

[0007] Step S1: Collecting historical protocol conversion execution records of a portable device with a multi-communication protocol interface; based on the different actual protocol conversion modes, classifying the historical protocol conversion execution records and analyzing the working performance characteristics of the portable device in each historical protocol conversion execution record;

[0008] Step S2: Comparing the deviation of the conversion time taken to complete video protocol conversion and the deviation of the working performance characteristics of the portable device when executing the same protocol conversion mode;

[0009] Step S3: combing the change rule of the conversion time length spent by the portable device in completing the corresponding video protocol conversion when performing different protocol conversion modes, capturing the feature conversion time length interval and the conversion time length fluctuation interval;

[0010] Step S4: calculating the performance fluctuation index presented by the portable device in the video protocol conversion process, and determining whether to send a warning prompt message to the management terminal according to the performance fluctuation index.

[0011] Preferably, step S1 comprises:

[0012] Step S1-1: obtaining the protocol conversion mode selected and called by the portable device in each historical protocol conversion execution record; collecting the historical protocol conversion execution records with the same selected and called protocol conversion mode to obtain a plurality of target record sets;

[0013] Step S1-2: respectively extracting the parameter values of each feature condition parameter item affecting the video conversion performance of the portable device from each historical protocol conversion execution record, wherein the feature condition parameter items include: the total time length, resolution, bit rate and frame rate of the video to be converted, and the CPU utilization and system resource occupancy ratio of the portable device when starting to perform protocol conversion based on the selected and called corresponding protocol conversion mode;

[0014] The longer the video length, the longer the conversion time required, because the conversion process needs to process each frame, the longer the length, the more frames to process, so the conversion time will also be correspondingly extended; the higher the video resolution, the longer the conversion time required. High resolution means longer processing time for each pixel, so the overall conversion time will increase; the higher the bit rate, the larger the video data volume, and the longer the conversion time required. High bit rate means more data transmitted per second, which requires more processing time; the higher the frame rate, the more frames processed per second, and the conversion time will also be correspondingly extended. High frame rate video requires more computing resources to process the details of each frame; at the same time, the coded video occupies a lot of system resources.

[0015] Preferably, step S2 comprises:

[0016] Step S2-1: extracting the conversion time length spent by the portable device in completing the corresponding video protocol conversion in each historical protocol conversion execution record in each target record set; extracting any two different historical protocol conversion execution records whose conversion time length difference satisfies the time length difference threshold value, and constructing a plurality of feature record groups;

[0017] Step S2-2: Extract all feature condition parameter items showing parameter value deviation in the corresponding two different historical protocol conversion execution records for each feature record group, and set as the target condition parameter items of the feature record group;

[0018] Step S2-3: If the conversion duration Ta>Tb is met in the feature record group composed of the historical protocol conversion execution record a and the historical protocol conversion execution record b, wherein Ta and Tb are the conversion durations extracted from the historical protocol conversion execution records a and b respectively; set the parameter value extracted from the historical protocol conversion execution record b for the corresponding each target condition parameter item as the reference value X, and set the parameter value extracted from the historical protocol conversion execution record a for the corresponding each target condition parameter item as the reference change value Y;

[0019] Step S2-4: Calculate the reference change rate β = |X-Y| / X for each target condition parameter item in each feature record group, and sort all corresponding target condition parameter items in descending order of the corresponding reference change rate to obtain the feature target condition parameter item sequence of the corresponding each feature record group;

[0020] The arrangement in the feature target condition parameter item sequence reflects the contribution degree arrangement of the corresponding target condition parameter item in the process of affecting the conversion duration showing a growth trend to some extent. If the ordering value of a target condition parameter item in the feature target condition parameter item sequence is earlier, it means that the parameter value change on the target condition parameter item is more likely to be a variable factor causing the conversion duration of the portable device to increase.

[0021] Preferably, step S3 comprises:

[0022] Step S3-1: In each target record set, collect the feature record groups in which all the extracted target condition parameter items are completely the same and the extracted feature target condition parameter item sequences are also completely the same, to obtain a plurality of feature record group sets, and set the feature record group set containing the number of feature record groups greater than the number threshold as the target set;

[0023] Step S3-2: Extract the longest conversion duration Tmax and the shortest conversion duration Tmin spent by the portable device to complete the corresponding video protocol conversion in each target set in turn, and extract one feature conversion duration interval [Tmin, Tmax] for each target set;

[0024] Step S3-3: If it is found that there are N feature conversion duration intervals overlapping in a certain time interval, set the certain time interval as the conversion duration fluctuation interval of the portable device, and set the fluctuation coefficient value corresponding to the certain time interval as N, wherein N≧2.

[0025] Preferably, the step S4 comprises:

[0026] Step S4-1: all historical protocol conversion execution records covered in each target set are set as first target conversion records, and other historical protocol conversion execution records are set as second target conversion records; all historical protocol conversion execution records are arranged in chronological order according to record generation time, the interval duration between each adjacent two second target conversion records is captured, and the average interval duration Tf is obtained;

[0027] Since the historical protocol conversion execution records belonging to the first target conversion records are all historical protocol conversion execution records that can be mutually verified with other conversion duration changes, which are consistent with the working performance rules of the portable device when performing video protocol conversion, in the present scheme, the historical protocol conversion execution records belonging to the first target conversion records are by default records presenting normal working performance, and vice versa, the historical protocol conversion execution records belonging to the second target conversion records are by default records presenting abnormal working performance;

[0028] Step S4-2: the conversion duration of the portable device for completing corresponding video protocol conversion in each second target conversion record is traversed; if the conversion duration extracted from a certain second target conversion record is in a certain conversion duration fluctuation interval, the fluctuation coefficient value corresponding to the certain conversion duration fluctuation interval is set as the abnormal weight value of the certain second target conversion record, and the average abnormal weight value G of all second target conversion records is obtained;

[0029] Step S4-3: the total number Q of the second target conversion records is accumulated, and the performance fluctuation index δ of the portable device in the process of performing video protocol conversion is calculated as δ=(1 / Tf)×G×Q; when the performance fluctuation index is greater than an index threshold value, a warning prompt information is sent to the management terminal.

[0030] In order to better realize the above method, a portable device video signal analysis system is also proposed, which comprises: a protocol conversion execution data management module, a protocol conversion record data comparison module, a feature execution data extraction module, and a performance warning prompt management module.

[0031] The protocol conversion execution data management module is used for collecting historical protocol conversion execution records of the portable device with multiple communication protocol interfaces; the historical protocol conversion execution records are classified based on different actual protocol conversion modes, and the working performance characteristics of the portable device in each historical protocol conversion execution record are sorted out.

[0032] The protocol conversion record data comparison module is configured to compare the deviation of the conversion time length taken by the portable device to complete the video protocol conversion and the deviation of the performance characteristics when the portable device performs the same protocol conversion mode.

[0033] The characteristic execution data extraction module is configured to analyze the change rule of the conversion time length taken by the portable device to complete the corresponding video protocol conversion when the portable device performs different protocol conversion modes, and capture the characteristic conversion time length interval and the conversion time length fluctuation interval.

[0034] The performance early warning prompt management module is configured to calculate the performance fluctuation index of the portable device during the video protocol conversion process, and determine whether to send the early warning prompt information to the management terminal according to the performance fluctuation index.

[0035] Preferably, the protocol conversion execution data management module comprises a historical record classification management unit and a characteristic data analysis unit.

[0036] The historical record classification management unit is configured to collect historical protocol conversion execution records of the portable device with multiple communication protocol interfaces, and classify the historical protocol conversion execution records according to different actually performed protocol conversion modes.

[0037] The characteristic data analysis unit is configured to analyze the performance characteristics of the portable device in each historical protocol conversion execution record.

[0038] Preferably, the characteristic execution data extraction module comprises a characteristic conversion time length interval extraction unit and a conversion time length fluctuation interval extraction unit.

[0039] The characteristic conversion time length interval extraction unit is configured to analyze the change rule of the conversion time length taken by the portable device to complete the corresponding video protocol conversion when the portable device performs different protocol conversion modes, and capture the characteristic conversion time length interval.

[0040] The conversion time length fluctuation interval extraction unit receives data in the characteristic conversion time length interval extraction unit, and captures the conversion time length fluctuation interval of the portable device.

[0041] Compared with the prior art, the application has the beneficial effects that: by analyzing the differences in conversion conditions and the deviations in conversion time length of the protocol conversion records generated by the portable device with a multi-protocol interface in different protocol conversion modes, for each historical protocol conversion record, by finding other historical protocol conversion execution records that can verify the change of the conversion time length, the performance stability of the portable device in the video signal protocol conversion process is evaluated, potential problems existing in the protocol conversion of the portable device are found and solved in time, the stability and reliability of video signal transmission processing are improved, and the risk of transmission conversion collapse or abnormality is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0042] Fig. 1 A flowchart of a video signal analysis method for a portable device with a multi-protocol interface according to the present application is shown.

[0043] Fig. 2 A structural diagram of a video signal analysis system for a portable device with a multi-protocol interface according to the present application is shown. DETAILED DESCRIPTION

[0044] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0045] Embodiment: As shown in the accompanying drawings, the present application provides a technical solution, a video signal analysis method for a portable device with a multi-protocol interface, which comprises: Figs. 1-2

[0046] Step S1: Collecting historical protocol conversion execution records of a portable device with a multi-communication protocol interface; based on the different protocol conversion modes actually executed, classifying the historical protocol conversion execution records and analyzing the working performance characteristics of the portable device in each historical protocol conversion execution record;

[0047] The selection and calling of a specific video conversion mode by the multi-protocol interface device mainly depends on the packaging format and encoding format of the device; the structure of a video file is usually composed of file information and audio / video data, different packaging formats (such as MP4, AVI, FLV, etc.) determine the structure of the video file and the size of the audio / video data block, and the selection of the packaging format will affect the compatibility and transmission efficiency of the video file;

[0048] Step S1 comprises:

[0049] ​Step S1-1: obtaining the protocol conversion mode selected by the portable device in each historical protocol conversion execution record; collecting the historical protocol conversion execution records with the same selected protocol conversion mode, to obtain a plurality of target record sets;

[0050] Step S1-2: extracting the parameter values of each characteristic condition parameter item affecting the video conversion performance of the portable device from each historical protocol conversion execution record, wherein the characteristic condition parameter items include: total length, resolution, bit rate and frame rate of the video to be converted, and CPU utilization and system resource occupancy ratio of the portable device when starting to perform protocol conversion based on the selected corresponding protocol conversion mode;

[0051] Step S2: comparing the deviation of the conversion time taken to complete video protocol conversion and the deviation of the working performance characteristics of the portable device when performing the same protocol conversion mode;

[0052] Step S2 includes:

[0053] Step S2-1: extracting the conversion time taken by the portable device to complete the corresponding video protocol conversion in each historical protocol conversion execution record in each target record set; extracting any two different historical protocol conversion execution records with a conversion time difference greater than a length difference threshold, to obtain a plurality of feature record groups;

[0054] Step S2-2: extracting all characteristic condition parameter items showing parameter value deviation in the corresponding two different historical protocol conversion execution records for each feature record group, and setting them as target condition parameter items of each feature record group;

[0055] Step S2-3: if the conversion time Ta>Tb in the feature record group composed of historical protocol conversion execution record a and historical protocol conversion execution record b, wherein Ta and Tb are the conversion times extracted from historical protocol conversion execution records a and b respectively; setting the parameter values of each target condition parameter item extracted from historical protocol conversion execution record b as the reference value X, and setting the parameter values of each target condition parameter item extracted from historical protocol conversion execution record a as the reference change value Y;

[0056] For example, in historical protocol conversion execution record a, the conversion time taken to complete the corresponding protocol conversion is 14 minutes, and in historical protocol conversion execution record b, the conversion time taken to complete the corresponding protocol conversion is 8 minutes; if the target condition parameter items of this feature record group include total length, resolution, frame rate and CPU utilization;

[0057] Because 14min>8min, and as can be known from the above, the parameter values of the total time length, resolution, frame rate and CPU utilization rate specifically extracted from the historical protocol conversion execution record b are set as the corresponding reference values, and the parameter values of the total time length, resolution, frame rate and CPU utilization rate specifically extracted from the historical protocol conversion execution record a are set as the reference change values;

[0058] Step S2-4: calculate the reference change rate β = |X-Y| / X for each target condition parameter item in each feature record group, respectively, and sort all corresponding target condition parameter items in descending order of the corresponding reference change rate to obtain a feature target condition parameter item sequence corresponding to each feature record group;

[0059] Step S3: analyze the change rule of the conversion time length spent by the portable device in completing the corresponding video protocol conversion when executing different protocol conversion modes, capture the feature conversion time length interval and the conversion time length fluctuation interval;

[0060] Step S3 includes:

[0061] Step S3-1: in each target record set, collect feature record groups with all corresponding extracted target condition parameter items being completely identical and the feature target condition parameter item sequence being completely identical, to obtain a plurality of feature record group sets, and set a feature record group set containing a number of feature record groups greater than the number threshold as a target set;

[0062] Step S3-2: extract the longest conversion time length Tmax and the shortest conversion time length Tmin spent by the portable device in completing the corresponding video protocol conversion in each target set in sequence, and extract one feature conversion time length interval [Tmin, Tmax] corresponding to one target set;

[0063] Step S3-3: if it is found through traversal that there are N feature conversion time length intervals that overlap in a certain time interval, set the certain time interval as the conversion time length fluctuation interval of the portable device, and set the fluctuation coefficient value corresponding to the certain time interval as N, where N≧2;

[0064] Step S4: calculate the performance fluctuation index of the portable device in the process of executing the video protocol conversion, and determine whether to send a warning prompt message to the management terminal according to the performance fluctuation index;

[0065] Step S4 includes:

[0066] Step S4-1: all historical protocol conversion execution records covered in each target set are converted into first target conversion records, and other historical protocol conversion execution records are converted into second target conversion records; all historical protocol conversion execution records are arranged in chronological order according to record generation time, the interval length between each adjacent two second target conversion records is captured, and the average interval length Tf is obtained;

[0067] Step S4-2: the conversion time taken by the portable device to complete the corresponding video protocol conversion is traversed in each second target conversion record; if the conversion time extracted from a certain second target conversion record is in a certain conversion time fluctuation interval, the fluctuation coefficient value corresponding to the certain conversion time fluctuation interval is set as the abnormal weight value of the certain second target conversion record, and the average abnormal weight value G of all second target conversion records is obtained.

[0068] Step S4-3: the total number Q of second target conversion records is accumulated, and the performance fluctuation index δ of the portable device in the process of executing video protocol conversion is calculated = (1 / Tf) × G × Q; when the performance fluctuation index is greater than the index threshold value, a warning prompt information is sent to the management terminal.

[0069] In order to better realize the above method, a portable device video signal analysis system is also proposed, which comprises: a protocol conversion execution data management module, a protocol conversion record data comparison module, a feature execution data extraction module, and a performance warning prompt management module.

[0070] The protocol conversion execution data management module is used to collect historical protocol conversion execution records of the portable device with multiple communication protocol interfaces; the historical protocol conversion execution records are classified based on different actual protocol conversion modes, and the working performance characteristics of the portable device in each historical protocol conversion execution record are sorted out.

[0071] The protocol conversion execution data management module comprises a historical record classification management unit and a feature data sorting unit.

[0072] The historical record classification management unit is used to collect historical protocol conversion execution records of the portable device with multiple communication protocol interfaces; the historical protocol conversion execution records are classified based on different actual protocol conversion modes.

[0073] The feature data sorting unit is used to sort out the working performance characteristics of the portable device in each historical protocol conversion execution record.

[0074] The protocol conversion record data comparison module is used to compare the deviation of the conversion time taken by the portable device to complete the video protocol conversion and the deviation of the working performance characteristics when the same protocol conversion mode is executed.

[0075] The feature execution data extraction module is used to sort out the change rule of the conversion time length of the portable device when performing different protocol conversion modes, and capture the feature conversion time length interval and the conversion time length fluctuation interval.

[0076] The feature execution data extraction module includes a feature conversion time length interval extraction unit and a conversion time length fluctuation interval extraction unit.

[0077] The feature conversion time length interval extraction unit is used to sort out the change rule of the conversion time length of the portable device when performing different protocol conversion modes, and capture the feature conversion time length interval.

[0078] The conversion time length fluctuation interval extraction unit receives the data in the feature conversion time length interval extraction unit, and captures the conversion time length fluctuation interval of the portable device.

[0079] The performance early warning prompt management module is used to calculate the performance fluctuation index of the portable device during the video protocol conversion process, and determine whether to send the early warning prompt information to the management terminal according to the performance fluctuation index.

[0080] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A method for video signal analysis of a portable device based on a multi-protocol interface, characterized by: The method comprises: Step S1: collecting historical protocol conversion execution records of a portable device with a multi-communication protocol interface; classifying the historical protocol conversion execution records based on different actual protocol conversion modes performed; and combing the working performance characteristics of the portable device in each historical protocol conversion execution record; Step S2: comparing the deviation of the conversion time length taken by the portable device to complete video protocol conversion and the deviation of the working performance characteristics when the portable device performs the same protocol conversion mode; The step S2 comprises: Step S2-1: extracting the conversion time length taken by the portable device to complete corresponding video protocol conversion in each historical protocol conversion execution record in each target record set; and extracting any two different historical protocol conversion execution records whose conversion time length difference satisfies a time length difference threshold value to construct a plurality of feature record groups; Step S2-2: extracting all characteristic condition parameter items that exhibit parameter value deviation in the corresponding two different historical protocol conversion execution records for each feature record group, and setting the corresponding characteristic condition parameter items as target condition parameter items of the feature record group; Step S2-3: if the conversion time length Ta>Tb is satisfied in the feature record group composed of historical protocol conversion execution record a and historical protocol conversion execution record b, wherein Ta and Tb are the conversion time lengths extracted from the historical protocol conversion execution records a and b, respectively; setting the parameter values extracted from the historical protocol conversion execution record b for the corresponding target condition parameter items as reference values X, and setting the parameter values extracted from the historical protocol conversion execution record a for the corresponding target condition parameter items as reference change values Y; Step S2-4: calculating the reference change rate β = |X-Y| / X for each target condition parameter item in each feature record group, and sorting all target condition parameter items in descending order of the corresponding reference change rate to obtain a feature target condition parameter item sequence corresponding to each feature record group; Step S3: combing the change rule of the conversion time length taken by the portable device to complete corresponding video protocol conversion when the portable device performs different protocol conversion modes, capturing a feature conversion time length interval and a conversion time length fluctuation interval; The step S3 comprises: Step S3-1: collecting the feature record groups in which all target condition parameter items extracted correspondingly are completely identical and the feature target condition parameter item sequences extracted correspondingly are also completely identical in each target record set to obtain a plurality of feature record group sets, and setting the feature record group set containing a number of feature record groups greater than a number threshold value as a target set; Step S3-2: extracting the longest conversion time length Tmax and the shortest conversion time length Tmin taken by the portable device to complete corresponding video protocol conversion in each target set in sequence, and extracting a feature conversion time length interval [Tmin, Tmax] corresponding to one target set. Step S3-3: If it is found that there is overlap between the N feature conversion duration intervals in a certain time interval, the certain time interval is set as the conversion duration fluctuation interval of the portable device, and the fluctuation coefficient value corresponding to the certain time interval is set as N, where N≧2; Step S4: Calculate the performance fluctuation index of the portable device in the process of performing video protocol conversion, and determine whether to send a warning prompt message to the management terminal according to the performance fluctuation index; Step S4-1: Set all historical protocol conversion execution records covered in each target set as first target conversion records, and set other historical protocol conversion execution records as second target conversion records; arrange all historical protocol conversion execution records in chronological order according to the record generation time, capture the interval duration between each adjacent two second target conversion records, and obtain the average interval duration Tf; Step S4-2: Traverse the conversion duration of the portable device for completing corresponding video protocol conversion in each second target conversion record; if the conversion duration extracted from a certain second target conversion record is in a certain conversion duration fluctuation interval, set the fluctuation coefficient value corresponding to the certain conversion duration fluctuation interval as the abnormal weight value of the certain second target conversion record, and obtain the average abnormal weight value G of all second target conversion records; Step S4-3: Accumulate the total number Q of second target conversion records, calculate the performance fluctuation index δ of the portable device in the process of performing video protocol conversion, and send a warning prompt message to the management terminal when the performance fluctuation index is greater than the index threshold value.

2. The method of claim 1, wherein the multi-protocol interface based portable device video signal analysis method is characterized by: The step S1 includes: Step S1-1: Obtain the protocol conversion mode selected and called by the portable device in each historical protocol conversion execution record; collect historical protocol conversion execution records with the same selected and called protocol conversion mode to obtain a plurality of target record sets; Step S1-2: Extract parameter values of each feature condition parameter item affecting the video conversion performance of the portable device from each historical protocol conversion execution record, where the feature condition parameter items include: total duration, resolution, bit rate and frame rate of the video to be converted, and CPU utilization and system resource occupancy ratio of the portable device when starting to perform protocol conversion based on the selected and called corresponding protocol conversion mode.

3. A portable device video signal analysis system for performing the portable device video signal analysis method based on a multi-protocol interface according to any one of claims 1-2, characterized by: The system includes: a protocol conversion execution data management module, a protocol conversion record data comparison module, a feature execution data extraction module, and a performance warning prompt management module; The protocol conversion execution data management module is configured to collect historical protocol conversion execution records of the portable device with multiple communication protocol interfaces; classify the historical protocol conversion execution records based on different actually performed protocol conversion modes, and analyze the working performance characteristics of the portable device in each historical protocol conversion execution record. The protocol conversion record data comparison module is configured to compare the deviation of conversion time length taken by the portable device to complete video protocol conversion when performing the same protocol conversion mode and the deviation of performance characteristics. The characteristic execution data extraction module is configured to sort the change rule of conversion time length taken by the portable device to complete corresponding video protocol conversion when performing different protocol conversion modes, and capture the characteristic conversion time length interval and conversion time length fluctuation interval. The performance early warning prompt management module is configured to calculate the performance fluctuation index of the portable device in the process of performing video protocol conversion, and determine whether to send early warning prompt information to the management terminal according to the performance fluctuation index.

4. A portable device video signal analysis system according to claim 3, wherein: The protocol conversion execution data management module includes a historical record classification management unit and a characteristic data sorting unit. The historical record classification management unit is configured to collect historical protocol conversion execution records of the portable device with multiple communication protocol interfaces. The historical protocol conversion execution records are classified based on different actually performed protocol conversion modes. The characteristic data sorting unit is configured to sort the performance characteristics of the portable device in each historical protocol conversion execution record.

5. A portable device video signal analysis system according to claim 4, wherein: The characteristic execution data extraction module includes a characteristic conversion time length interval extraction unit and a conversion time length fluctuation interval extraction unit. The characteristic conversion time length interval extraction unit is configured to sort the change rule of conversion time length taken by the portable device to complete corresponding video protocol conversion when performing different protocol conversion modes, and capture the characteristic conversion time length interval. The conversion time length fluctuation interval extraction unit receives data in the characteristic conversion time length interval extraction unit, and captures the conversion time length fluctuation interval of the portable device.

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