CN101656640B - Method and equipment for determining testing data - Google Patents
Method and equipment for determining testing data Download PDFInfo
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- CN101656640B CN101656640B CN2009101718865A CN200910171886A CN101656640B CN 101656640 B CN101656640 B CN 101656640B CN 2009101718865 A CN2009101718865 A CN 2009101718865A CN 200910171886 A CN200910171886 A CN 200910171886A CN 101656640 B CN101656640 B CN 101656640B
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Abstract
The invention relates to method and equipment for determining testing data, which belong to the field of multimedia processing and are used for obtaining the testing data for determining the performance of the equipment to be tested, thereby ensuring a conference television system works stably and efficiently. The method comprises the steps: transmitting first multimedia data packets to the equipment to be tested; receiving second multimedia data packets from the equipment to be tested and using the number of the received first multimedia data packets and the received second multimedia data packets as the testing data for determining the performance of the equipment to be tested, wherein the first multimedia data packets are RTP data packets which use data frames obtained from multimedia files as loads and the second multimedia data packets are generated according to multimedia data obtained by processing the first multimedia data packets by the equipment to be tested. The method can ensure that the conference television system works stably and efficiently and enhance testing efficiency.
Description
Technical field
The present invention relates to the multimedia process field, particularly a kind of method and apparatus of definite test data.
Background technology
Along with the continuous development of the Internet, network has become the part in people's work and the life.The appearance of video conferencing brings great convenience to people's work.
Video conferencing is to utilize TV and special equipment, by communication, computer network, the meeting room in two places or a plurality of places is coupled together, and holds a kind of communication technology real-time, two-way, interactively video conferencing with TV mode.
The capacity of the media channel that the multimedia processing apparatus in the TV conference system can be supported and the QoS of audio frequency and video (Quality of Service, quality of service) guarantee that TV conference system can be stablized, an important technology index of efficient operation
Continuous development along with network technology.TV conference system towards jumbo direction fast development, is to guarantee that TV conference system is stable, the prerequisite of efficient operation so test for the multimedia processing apparatus in the TV conference system also.
Owing to also do not have a kind of scheme that multimedia processing apparatus is tested at present, the tester can't obtain the test data to multimedia processing apparatus.
Summary of the invention
The invention provides a kind of method and apparatus of definite test data, in order to obtaining to determine the test data of Devices to test performance, thereby guarantee that TV conference system is stable, work efficiently.
The invention provides a kind of method of definite test data, this method comprises:
Send the first multi-medium data bag to Devices to test, the described first multi-medium data bag is with the Frame that obtains in the multimedia file real time transport protocol RTP packet as load;
Reception is from the second multi-medium data bag of described Devices to test, the wherein said second multi-medium data bag is that described Devices to test carries out data processing to the described first multi-medium data bag and obtains multi-medium data, and the multi-medium data bag that generates according to described multi-medium data;
With the quantity of the described second multi-medium data bag of the quantity of the described first multi-medium data bag that sends and reception test data as definite Devices to test performance;
Wherein, the described first multi-medium data bag constitutes according to the following step:
Cycle is read the Frame of preseting length from multimedia file;
The Frame that will read from multimedia file is as load, and adds the RTP head before load;
Loadtype, Frame sequence number and time stamp in the described RTP head are set, obtain the RTP packet.
The present invention also provides a kind of equipment of definite test data, and this equipment comprises:
Sending module is used for sending the first multi-medium data bag to Devices to test, and the described first multi-medium data bag is with the Frame that obtains in the multimedia file real time transport protocol RTP packet as load;
Receiver module, be used to receive the second multi-medium data bag from described Devices to test, the wherein said second multi-medium data bag is that described Devices to test carries out data processing to the described first multi-medium data bag and obtains multi-medium data, and the multi-medium data bag that generates according to described multi-medium data;
Processing module is used for the cycle to read the Frame of preseting length from multimedia file; The Frame that will read from multimedia file is as load, and adds the RTP head before load; Loadtype, Frame sequence number and time stamp in the described RTP head are set, obtain the RTP packet, and the first multi-medium data bag that the RTP packet that obtains is sent to Devices to test as described sending module; With the quantity of the described second multi-medium data bag of the quantity of the described first multi-medium data bag that sends and reception test data as definite Devices to test performance.
The present invention sends as the first multi-medium data bag Frame that obtains in multimedia file RTP (Real-time Transport Protocol, the real time transport protocol) packet as load to Devices to test; Behind the second multi-medium data bag that receives from Devices to test, with the quantity of the second multi-medium data bag of the quantity of the first multi-medium data bag that sends and reception test data as definite Devices to test performance.Because the present invention can obtain to determine the test data of Devices to test performance, thereby guarantee that TV conference system is stable, work efficiently, and improved testing efficiency.
Description of drawings
Fig. 1 determines the device structure schematic diagram of test data for the present invention;
Fig. 2 determines the system configuration schematic diagram of test data for the present invention;
Fig. 3 determines the method flow schematic diagram of test data for the present invention;
Fig. 4 tests the method flow schematic diagram of multimedia processing apparatus for the present invention;
The method flow schematic diagram of Fig. 5 normal multi-medium data bag for the present invention constructs;
Fig. 6 is the method flow schematic diagram of structural anomaly multi-medium data bag of the present invention;
Fig. 7 sends the method flow schematic diagram of multi-medium data bag to Devices to test for the present invention.
Embodiment
The present invention sends as the first multi-medium data bag Frame that obtains in the multimedia file RTP packet as load to Devices to test; Behind the second multi-medium data bag that receives from Devices to test, with the quantity of the second multi-medium data bag of the quantity of the first multi-medium data bag that sends and reception test data as definite Devices to test performance.Because the present invention can obtain to determine the test data of Devices to test performance, thereby guarantee that TV conference system is stable, work efficiently, and improved testing efficiency.
Below in conjunction with Figure of description the present invention is described in further detail.
As shown in Figure 1, the present invention determines that the equipment of test data comprises: sending module 100, receiver module 110 and processing module 120.
120 cycles of processing module are read the data of preseting length from multimedia file, the Frame that will read from multimedia file is as load, and add the RTP head before load; Loadtype, Frame sequence number and time stamp in the RTP head are set, obtain the RTP packet, and the first multi-medium data bag that the RTP packet that obtains is sent to Devices to test as sending module 100.
Multimedia file of the present invention can be that the video multimedia file can be the audio frequency multimedia file also, and the data that read also can be video data frame or audio data frame.
The length and the read cycle of concrete read data frame can be decided as required.
In specific implementation process, processing module 120 can move on to the Frame that reads in the buffering area to be sent, and with the content in the frame data buffer district as load.
Content in the RTP head of the present invention includes but not limited to loadtype, Frame sequence number and time stamp.
The first multi-medium data bag of processing module 120 structures can be normal multi-medium data bag, also can be unusual multi-medium data bag.
If construct normal multi-medium data bag, then processing module 120 is provided with the loadtype in the RTP head, Frame sequence number and time stamp correctly.
Correct load class is meant: the actual type of load coupling in the loadtype of setting and this multi-medium data bag is an audio frame such as the actual type of load, and then the loadtype of She Zhiing also is an audio frame.
Correct Frame sequence number is meant: the Frame numeric order of setting is arranged, and is that order increases progressively such as general sequence number, and promptly the sequence number of first Frame is that the sequence number of 1, second Frame is 2, and the like.
Correct Frame sequence number is meant: the time stamp of setting is identical with the time stamp of the time correspondence that sends this multi-medium data bag, such as the time stamp that sends first multi-medium data bag is 0, the time stamp that sends second multi-medium data bag is 3600, the time stamp that sends the 3rd multi-medium data bag is 7200, and the like.
If construct normal multi-medium data bag, at least a mistake that is provided with during then processing module 120 is provided with the loadtype in the RTP head, Frame sequence number and time stamp.
The load class of mistake is meant: the actual type of load does not match in the loadtype of setting and this multi-medium data bag, is audio frame such as the actual type of load, and then the loadtype of She Zhiing is not audio frame (such as being arranged to frame of video).
The Frame sequence number of mistake is meant: the Frame sequence number of setting is not a sequence arrangement, is that order increases progressively such as general sequence number, and the Frame sequence number that then can be arranged to is that out of order arrangement, repeated arrangement or saltus step are arranged.
The Frame sequence number of mistake is meant: the time stamp of the time correspondence of the time stamp of setting and this multi-medium data bag of transmission is inequality, differ 3600 such as the time stamp that sends adjacent multi-medium data bag, the time stamp that then sends second multi-medium data bag should be 3600, can be arranged to 7200.
Sending module 100 can be normal multi-medium data bag to the first multi-medium data bag that Devices to test sends, and also can be unusual multi-medium data bag, can also be that normal data packet and abnormal data bag mix transmission.
Sending module 100 can send the first multi-medium data bag by a plurality of ports of IP address binding.
Sending module 100 sends the first multi-medium data bag according to the transmission rate of the multi-medium data bag of setting from the port of determining; Wherein, transmission rate is fixed rate or rate of change.
Fixed rate can be set as required, such as 60KB/s.
Rate of change also can be set as required, such as can equal time at interval in, a period of time does not send the first multi-medium data bag or sends a small amount of multi-medium data bag, a period of time sends a large amount of multi-medium data bags, can send the first multi-medium data bag with 60KB/s in the 10ms, down not send the first multi-medium data bag in the 10ms or to send the first multi-medium data bag according to 20KB/s.
The second multi-medium data bag that receiving equipment 110 is received is that Devices to test carries out data processing to the first multi-medium data bag and obtains multi-medium data, and the multi-medium data bag that generates according to multi-medium data.
Different Devices to tests, also inequality to the processing of the first multi-medium data bag received, be multimedia processing apparatus in the TV conference system such as Devices to test, then the processing mode of multimedia processing apparatus is as follows:
1, after data source has taken place to switch,, beats the sequence number and the time stamp of rtp bag again in order when sending, not to be reflected to output;
2, for there being rtp load inside that additional payload (load) head is arranged, need to resolve the payload head of media data packet;
3, need separate TS and decoding for TS stream (transmitting stream);
4, need carry out I frame detection etc. for video data.
The quantity of definite first multi-medium data that sends of 120 cycles of processing module and the quantity of receiving multimedia data bag; Quantity according to first multi-medium data that sends, determine the par of first multi-medium data of the transmission of per second in this cycle, and, determine the par of second multi-medium data that per second receives in this cycle according to the quantity of second multi-medium data that receives; With the par of the second multi-medium data bag of the par of first multi-medium data of the transmission determined in the same cycle and reception test data as this cycle correspondence.
The par of first multi-medium data that the tester receives according to per second in each cycle, and the difference between the par of second multi-medium data that per second receives in each cycle just can be tested the capacity of testing data or error correcting capability etc.
Many such as normal multi-medium data bag, and difference can determine then that less than first threshold value Devices to test can bear current data volume, can improve the data volume of transmission then, up to difference greater than first threshold value;
Unusual multi-medium data bag is many, and difference is less than second threshold value, can determine that then the error correcting capability of Devices to test can bear current abnormal data bag situation, can improve the quantity of unusual multi-medium data bag then, up to difference greater than second threshold value.
First threshold value and second threshold value can be set as required.
The process of above-mentioned analysis can also be carried out by processing module 120, it is the par that processing module 120 is determined first multi-medium data that per second receives in each cycle, and the difference between the par of second multi-medium data that per second receives in each cycle, and the performance of measuring as required, determine with first threshold value still to be that second threshold value compares, improve the unusual multi-medium data bag of fixed rate or increase fixed qty then at every turn.
In order better Devices to test to be detected, can also there be the equipment of a plurality of definite test datas to link to each other with Devices to test, send the first multi-medium data bag to Devices to test simultaneously, specifically can be referring to Fig. 2.
As shown in Figure 3, the present invention determines that the method for test data comprises the following steps:
The quantity of the quantity of step 303, the first multi-medium data bag that will send and the second multi-medium data bag of reception is as the test data of determining the Devices to test performance.
Can further include before the step 301:
Step 300, basis read the data of preseting length from multimedia file, constitute the first multi-medium data bag.
Cycle is read the data of preseting length from multimedia file, the Frame that will read from multimedia file is as load, and adds the RTP head before load; Loadtype, Frame sequence number and time stamp in the RTP head are set, obtain the RTP packet.
Multimedia file of the present invention can be that the video multimedia file can be the audio frequency multimedia file also, and the data that read also can be video data frame or audio data frame.
The length and the read cycle of concrete read data frame can be decided as required.
In the step 300, the Frame that reads can be moved on in the buffering area to be sent, and with the content in the frame data buffer district as load.
Content in the RTP head of the present invention includes but not limited to loadtype, Frame sequence number and time stamp.
The first multi-medium data bag of structure can be normal multi-medium data bag in the step 300, also can be unusual multi-medium data bag.
If construct normal multi-medium data bag, then the loadtype in the RTP head, Frame sequence number and time stamp are provided with correctly.
Correct load class is meant: the actual type of load coupling in the loadtype of setting and this multi-medium data bag is an audio frame such as the actual type of load, and then the loadtype of She Zhiing also is an audio frame.
Correct Frame sequence number is meant: the Frame numeric order of setting is arranged, and is that order increases progressively such as general sequence number, and promptly the sequence number of first Frame is that the sequence number of 1, second Frame is 2, and the like.
Correct Frame sequence number is meant: the time stamp of setting is identical with the time stamp of the time correspondence that sends this multi-medium data bag, such as the time stamp that sends first multi-medium data bag is 0, the time stamp that sends second multi-medium data bag is 3600, the time stamp that sends the 3rd multi-medium data bag is 7200, and the like.
If construct normal multi-medium data bag, at least a mistake that is provided with in then the loadtype in the RTP head, Frame sequence number and time stamp being provided with.
The load class of mistake is meant: the actual type of load does not match in the loadtype of setting and this multi-medium data bag, is audio frame such as the actual type of load, and then the loadtype of She Zhiing is not audio frame (such as being arranged to frame of video).
The Frame sequence number of mistake is meant: the Frame sequence number of setting is not a sequence arrangement, is that order increases progressively such as general sequence number, and the Frame sequence number that then can be arranged to is that out of order arrangement, repeated arrangement or saltus step are arranged.
The Frame sequence number of mistake is meant: the time stamp of the time correspondence of the time stamp of setting and this multi-medium data bag of transmission is inequality, differ 3600 such as the time stamp that sends adjacent multi-medium data bag, the time stamp that then sends second multi-medium data bag should be 3600, can be arranged to 7200.
The first multi-medium data bag that sends to Devices to test in the step 301 can be normal multi-medium data bag, also can be unusual multi-medium data bag, can also be that normal data packet and abnormal data bag mix transmission.
Can send the first multi-medium data bag by a plurality of ports of IP address binding in the step 301.
Such as, according to the corresponding relation of predefined IP address and port, determine the IP address corresponding port of Devices to test, send the first multi-medium data bag from the port of determining.
Can also send the first multi-medium data bag from the port of determining according to the transmission rate of the multi-medium data bag of setting in the step 301; Wherein, transmission rate is fixed rate or rate of change.
Fixed rate can be set as required, such as 60KB/s.
Rate of change also can be set as required, such as can equal time at interval in, a period of time does not send the first multi-medium data bag or sends a small amount of multi-medium data bag, a period of time sends a large amount of multi-medium data bags, can send the first multi-medium data bag with 60KB/s in the 10ms, down not send the first multi-medium data bag in the 10ms or to send the first multi-medium data bag according to 20KB/s.
In the step 302, the second multi-medium data bag of receiving is that Devices to test carries out data processing to the first multi-medium data bag and obtains multi-medium data, and the multi-medium data bag that generates according to multi-medium data.
Different Devices to tests, also inequality to the processing of the first multi-medium data bag received
In the step 303, the quantity of definite first multi-medium data that sends of cycle and the quantity of receiving multimedia data bag; Quantity according to first multi-medium data that sends, determine the par of first multi-medium data of the transmission of per second in this cycle, and, determine the par of second multi-medium data that per second receives in this cycle according to the quantity of second multi-medium data that receives; With the par of the second multi-medium data bag of the par of first multi-medium data of the transmission determined in the same cycle and reception test data as this cycle correspondence.
The par that can show first multi-medium data that per second receives in each cycle in the step 302, and the par of second multi-medium data that per second receives in each cycle.
Can also print the par of first multi-medium data that per second receives in each cycle in the step 302 every set time (such as 2S), and the par of second multi-medium data that per second receives in each cycle.
The par of first multi-medium data that the tester receives according to per second in each cycle, and the difference between the par of second multi-medium data that per second receives in each cycle just can be tested the capacity of testing data or error correcting capability etc.
Many such as normal multi-medium data bag, and difference can determine then that less than first threshold value Devices to test can bear current data volume, can improve the data volume of transmission then, up to difference greater than first threshold value;
Unusual multi-medium data bag is many, and difference is less than second threshold value, can determine that then the error correcting capability of Devices to test can bear current abnormal data bag situation, can improve the quantity of unusual multi-medium data bag then, up to difference greater than second threshold value.
First threshold value and second threshold value can be set as required.
As shown in Figure 4, the present invention's method of testing multimedia processing apparatus comprises the following steps:
As shown in Figure 5, the present invention's method of constructing normal multi-medium data bag comprises the following steps:
The data that regular length is read in step 501, testing equipment (promptly determining the equipment of test data) circulation in audio frequency or the video media file are put into buffering area to be sent.
As shown in Figure 6, the method for structural anomaly multi-medium data bag of the present invention comprises the following steps:
The data that regular length is read in step 601, testing equipment (promptly determining the equipment of test data) circulation in audio frequency or the video media file are put into buffering area to be sent.
The actual type of load does not match in the loadtype that is provided with and this multi-medium data bag;
The Frame sequence number that is provided with is not a sequence arrangement;
The time stamp of the time correspondence of the time stamp that is provided with and this multi-medium data bag of transmission is inequality.
As shown in Figure 7, the present invention comprises the following steps: to the method that Devices to test sends the multi-medium data bag
Wherein, transmission rate is fixed rate or rate of change.
Multi-medium data bag after step 703, testing equipment are handled by the port reception multimedia processing apparatus of determining.
From above-mentioned as can be seen: the present invention sends the first multi-medium data bag to Devices to test, and the first multi-medium data bag is with the Frame that obtains in the multimedia file real time transport protocol RTP packet as load; Reception is from the second multi-medium data bag of Devices to test, and the second multi-medium data bag is that Devices to test carries out data processing to the first multi-medium data bag and obtains multi-medium data, and the multi-medium data bag that generates according to multi-medium data; With the quantity of the second multi-medium data bag of the quantity of the first multi-medium data bag that sends and reception test data as definite Devices to test performance.
Because the present invention can obtain to determine the test data of Devices to test performance, thereby guarantee that TV conference system is stable, work efficiently, and improved testing efficiency.
Further, testing cost of the present invention is low, and test input data consistency is good, and the testing time is controlled, makes the repeatability of test process be improved.
In addition, the present invention can be undertaken fault-tolerant and the error-correcting performance test by constructing wrong medium bag, has improved the comprehensive of test, can convenient-to-running capacity and the performance that the video conferencing medium are handled test.
The present invention can also the test terminal fault freedom, comprise that terminal is to one the tunnel or the fault-tolerant ability of multi-path media data.
The solution of the present invention can be tested MCU (the Multipoint Control Unit in the Devices to test, multipoint control unit) medium are handled capacity, also can test the error-correcting performance of FEC (Forward ErrorCorrection, the forward error correction) module in the Devices to test.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the method for a definite test data is characterized in that, this method comprises:
Send the first multi-medium data bag to Devices to test, the described first multi-medium data bag is with the Frame that obtains in the multimedia file real time transport protocol RTP packet as load;
Reception is from the second multi-medium data bag of described Devices to test, the wherein said second multi-medium data bag is that described Devices to test carries out data processing to the described first multi-medium data bag and obtains multi-medium data, and the multi-medium data bag that generates according to described multi-medium data;
With the quantity of the described second multi-medium data bag of the quantity of the described first multi-medium data bag that sends and reception test data as definite Devices to test performance;
Wherein, the described first multi-medium data bag constitutes according to the following step:
Cycle is read the Frame of preseting length from multimedia file;
The Frame that will read from multimedia file is as load, and adds the RTP head before load;
Loadtype, Frame sequence number and time stamp in the described RTP head are set, obtain the RTP packet.
2. the method for claim 1 is characterized in that, describedly sends the first multi-medium data bag to described Devices to test and comprises normal multi-medium data bag and/or unusual multi-medium data bag;
The time stamp that the actual type of load coupling in the loadtype that is provided with in the described normal multi-medium data bag and this multi-medium data bag, the Frame numeric order that is provided with are arranged, are provided with is identical with the time stamp of the time correspondence that sends this multi-medium data bag;
There is at least a in the following situation in the described unusual multi-medium data bag:
The Frame sequence number that the actual type of load does not match, is provided with in the loadtype that is provided with and this multi-medium data bag not sequence arrangement, setting time stamp and to send the time stamp of time correspondence of this multi-medium data bag inequality.
3. the method for claim 1 is characterized in that, describedly sends the first multi-medium data bag to Devices to test and comprises:
According to the corresponding relation of predefined IP address and port, determine the IP address corresponding port of Devices to test;
Send the described first multi-medium data bag from the port of determining.
4. method as claimed in claim 3 is characterized in that, according to the transmission rate of the multi-medium data bag of setting, sends the described first multi-medium data bag from the port of determining;
Wherein, described transmission rate is fixed rate or rate of change.
5. the method for claim 1 is characterized in that, the quantity of the described second multi-medium data bag of the quantity of the described described first multi-medium data bag that will send and reception comprises as the test data of determining the Devices to test performance:
The quantity of definite described first multi-medium data bag that sends of cycle and the quantity of receiving multimedia data bag; Quantity according to the described first multi-medium data bag that sends, determine the par of the described first multi-medium data bag of the transmission of per second in this cycle, and, determine the par of the described second multi-medium data bag that per second receives in this cycle according to the quantity of the described second multi-medium data bag that receives;
With the par of the described second multi-medium data bag of the par of the described first multi-medium data bag of the transmission determined in the same cycle and reception test data as this cycle correspondence.
6. the equipment of a definite test data is characterized in that, this equipment comprises:
Sending module is used for sending the first multi-medium data bag to Devices to test, and the described first multi-medium data bag is with the Frame that obtains in the multimedia file real time transport protocol RTP packet as load;
Receiver module, be used to receive the second multi-medium data bag from described Devices to test, the wherein said second multi-medium data bag is that described Devices to test carries out data processing to the described first multi-medium data bag and obtains multi-medium data, and the multi-medium data bag that generates according to described multi-medium data;
Processing module is used for the cycle to read the Frame of preseting length from multimedia file; The Frame that will read from multimedia file is as load, and adds the RTP head before load; Loadtype, Frame sequence number and time stamp in the described RTP head are set, obtain the RTP packet, and the first multi-medium data bag that the RTP packet that obtains is sent to Devices to test as described sending module; With the quantity of the described second multi-medium data bag of the quantity of the described first multi-medium data bag that sends and reception test data as definite Devices to test performance.
7. equipment as claimed in claim 6 is characterized in that, the described first multi-medium data bag that described sending module sends to described Devices to test comprises normal multi-medium data bag and/or unusual multi-medium data bag;
The time stamp that the actual type of load coupling in the loadtype that is provided with in the described normal multi-medium data bag and this multi-medium data bag, the Frame numeric order that is provided with are arranged, are provided with is identical with the time stamp of the time correspondence that sends this multi-medium data bag;
There is at least a in the following situation in the described unusual multi-medium data bag:
The Frame sequence number that the actual type of load does not match, is provided with in the loadtype that is provided with and this multi-medium data bag not sequence arrangement, setting time stamp and to send the time stamp of time correspondence of this multi-medium data bag inequality.
8. equipment as claimed in claim 6 is characterized in that, described sending module also is used for:
According to the corresponding relation of predefined IP address and port, determine the IP address corresponding port of Devices to test; Send the described first multi-medium data bag from the port of determining.
9. equipment as claimed in claim 8 is characterized in that, described sending module also is used for:
According to the transmission rate of the multi-medium data bag of setting, send the described first multi-medium data bag from the port of determining;
Wherein, described transmission rate is fixed rate or rate of change.
10. equipment as claimed in claim 6 is characterized in that, described processing module also is used for:
The quantity of definite described first multi-medium data bag that sends of cycle and the quantity of receiving multimedia data bag; Quantity according to the described first multi-medium data bag that sends, determine the par of the described first multi-medium data bag of the transmission of per second in this cycle, and, determine the par of the described second multi-medium data bag that per second receives in this cycle according to the quantity of the described second multi-medium data bag that receives; With the par of the described second multi-medium data bag of the par of the described first multi-medium data bag of the transmission determined in the same cycle and reception test data as this cycle correspondence.
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| CN109309831A (en) * | 2018-12-13 | 2019-02-05 | 苏州科达科技股份有限公司 | The test method and device of video delay in video conference |
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