CN101888278B - Interference detection method and system based on mobile communication terminal - Google Patents
Interference detection method and system based on mobile communication terminal Download PDFInfo
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- CN101888278B CN101888278B CN2010102086282A CN201010208628A CN101888278B CN 101888278 B CN101888278 B CN 101888278B CN 2010102086282 A CN2010102086282 A CN 2010102086282A CN 201010208628 A CN201010208628 A CN 201010208628A CN 101888278 B CN101888278 B CN 101888278B
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Abstract
The invention provides interference detection method and system based on a mobile communication terminal. The method comprises the following steps of: establishing wireless connection between the mobile communication terminal and a video signal source, and displaying a video on the mobile communication terminal; establishing talking connection between the mobile communication terminal and a wireless comprehensive test instrument; acquiring the video from the mobile communication terminal; analyzing the number of frames with mosaic, no sound and no image occurring in the acquired video; and comparing the frame number with a subjective quality performance criterion, and outputting the comparison result. The interference detection method and system based on the mobile communication terminal can be used for accurately detecting the interference of a communication module in a TV module and comparing the interference condition with the subjective quality performance criterion, and thus, TV programs can be normally watched when a user talks on the mobile communication terminal.
Description
Technical field
The present invention is about interference detection technique, particularly about a kind of interference detection method and system of movement-based communication terminal.
Background technology
Along with popularizing of mobile communication terminal, the function of mobile communication terminal is also more and more, present having developed has the mobile communication terminal that can watch TV programme, and people both can converse with such mobile communication terminal, can watch TV programme again.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: the variation of the function of mobile communication terminal can be satisfied people's needs really, but there is not the testing mobile phone communication module in the prior art to the interference of mobile TV module, if the mobile communication module is excessive to the interference of mobile TV module, the interference that people just may be conversed when watching TV programme flower screen, mosaic, voiceless sound occur and/or without situations such as videos such as television video picture.
Summary of the invention
The object of the invention is to provide a kind of interference detection method and system of movement-based communication terminal, to detect in the mobile communication terminal mobile communication module to the interference of mobile TV module.
To achieve these goals, the invention provides a kind of interference detection method of movement-based communication terminal, described method comprises: set up the wireless connections between described mobile communication terminal and the video signal source, and on described mobile communication terminal display video; Reduce gradually the power of described video signal source, test the static sensitivity of television module in the described mobile communication terminal; Increase gradually the power of described video signal source, so that the sensitivity of described television module increases adB, a 〉=1; Setting up described mobile communication terminal is connected with the conversation of wireless composite tester; Obtain described video from described mobile communication terminal; Mosaic in the described video that analysis is obtained, voiceless sound and/or without the frame number of image; Described frame number and subjective quality performance criterion are compared, and the output comparative result.
To achieve these goals, the present invention also provides a kind of Interference Detection system of movement-based communication terminal, described system comprises: video display unit, be used for setting up the wireless connections between described mobile communication terminal and the video signal source, and on described mobile communication terminal display video; The static sensitivity test cell is used for the static sensitivity of testing described mobile communication terminal television module; The sensitivity setup unit increases the power of described video signal source gradually, so that the sensitivity of described television module increases adB, a 〉=1; The unit is set up in conversation, is used for setting up described mobile communication terminal and is connected with the conversation of wireless composite tester; The video acquisition unit is used for obtaining described video from described mobile communication terminal; The described video mosaic that obtains, voiceless sound be used for to be analyzed and/or without the frame number of image in the video analysis unit; The analysis result comparing unit is used for described frame number and subjective quality performance criterion are compared, and the output comparative result.
The useful technique effect of the embodiment of the invention: the interference detection method of mobile communication terminal of the present invention and system can detect in the mobile communication terminal communication module accurately to the interference of television module, and disturbed condition and subjective quality performance criterion compared, guaranteed that mobile communication terminal can watch TV programme normally when conversation.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the composition schematic diagram of embodiment of the invention EMI test equipment;
Fig. 2 is the structural representation of the Interference Detection system of a kind of movement-based communication terminal of the embodiment of the invention;
Fig. 3 is the interference detection method flow chart of embodiment of the invention movement-based communication terminal;
Fig. 4 is the video channel schematic diagram of embodiment of the invention TD-SCDMA/CMMB multi-media broadcast terminal;
Fig. 5 is the talk channel schematic diagram of embodiment of the invention TD-SCDMA/CMMB multi-media broadcast terminal;
Fig. 6 is the schematic diagram that video was obtained and analyzed to the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the composition schematic diagram of embodiment of the invention EMI test equipment; As shown in Figure 1, mobile communication terminal 101 is placed in the microwave dark room, and to mask the interference of outer signals, mobile communication terminal can be mobile phone, PDA etc.Wireless composite tester 103 is positioned over outside the microwave dark room, and antenna 106 is placed in the microwave dark room, and wireless composite tester 103 communicates by antenna 106 and mobile communication terminal 101.The position relationship of mobile communication terminal 101 and antenna 106 as shown in Figure 1, mobile communication terminal 101 fronts or the back side are towards antenna 106, with line and the horizontal direction miter angle of antenna 106, can also with mobile communication terminal 101 along continuous straight runs 90-degree rotations, make its side towards antenna 106.Wireless composite tester 103 can communicate by anolog base station, can establish a communications link with mobile communication terminal 101, and carry out conversing without charging.Video signal source 105 is placed on outside the microwave dark room, and antenna 107 is placed on outside the microwave dark room, and video signal source 105 communicates by antenna 107 mobile communication terminals 101.Video signal source 105 provides vision signal to mobile communication terminal 101, and the television module of mobile communication terminal 101 can receiving video signals and displaying video.
Before test mobile communication terminal 101 and the impact of conversation wireless composite tester 103 on mobile communication terminal 101 displaying videos, need to calibrate and compensate link load, concrete calibration and compensation method are as follows:
Input port with antenna 106 cableport (not shown in figure 1) access network analyzers, the output port of the path 1 access network analyzer of wireless comprehensive test instrument 103 ports, power splitter 1 port 3 terminations 50 Ohmic resistances, measure the loss between network analyzer input port and the output port, be recorded as L1.Antenna factor is AF1.With the numerical value of total loss L1+AF1, compensate the RF output port to wireless comprehensive test instrument 103.
Input port with antenna 107 cableport (not shown in figure 1) access network analyzers, the output port of the path 1 access network analyzer of vision signal source port, port 3 terminations 50 Ohmic resistances of power splitter 2, measure the loss between network analyzer input port and the output port, be recorded as L2.Antenna factor is AF2.With the numerical value of total loss L2+AF2, compensate the RF output port to video signal source 105.
The signal of wireless composite tester 103 and video signal source 105 enters frequency spectrograph 109 through power splitter 3, frequency spectrograph 109 can monitor frequency and the power of wireless composite tester 103 and video signal source 105, judges whether wireless composite tester 103 and video signal source 105 work.
1) channel parameter of multi-media broadcast terminal CMMB:
Frequency range: 470MHz～798MHz(UHF), 2635MHz～2660MHz(S wave band);
Signal bandwidth: 8MHz;
Modulation parameter: BPSK, QPSK, 16QAM;
Sub-carrier number: 4096;
RS coding: (240,176), (240,192), (240,224), (240,240);
LDPC coding: 1/2,3/4;
Pattern interweaves outward: pattern 1, pattern 2, mode 3.
2) channel parameter of multi-media broadcast terminal T-MMB:
Frequency range: wave band III, UHF, L-band and S-band;
Signal bandwidth: 1.536MHz (working method 1.7MHz), 7.712MHz(working method 8MHz);
Channel bandwidth: 1.712MHz (working method 1.7MHz), 8MHz(working method 8MHz);
Modulation system: 8DPSK;
Sub-carrier number: 2048,1024,512 and 256, the corresponding transmission mode I of difference, IV, II and III
Chnnel coding: 1/2LDPC;
Transmission mode: transmission mode I, IV, II and III;
Circulating prefix-length: 246 μ s, 123 μ s, 63 μ s and 31 μ s, respectively corresponding transmission mode I, IV, II and III;
Interleave depth: grade I, IV, II and III;
Payload data rate: 1.728Mbps (working method 1.7MHz), 8.64Mbps(working method 8MHz).
The below describes embodiments of the invention in detail as an example of multi-media broadcast terminal CMMB example.
Fig. 2 is the structural representation of the Interference Detection system of a kind of movement-based communication terminal of the embodiment of the invention, as shown in Figure 2, described system comprises: video display unit 201, and unit 202 is set up in conversation, video acquisition unit 203, video analysis unit 204 and analysis result comparing unit 205.
Conversation is set up unit 202 and is set up described mobile communication terminal 101 by antenna 106 and be connected with the conversation of wireless composite tester 103.Conversation is set up unit 202 and is set up described mobile communication terminal 101 according to the channel of described mobile communication terminal 101 and be connected with the conversation of wireless composite tester, and the power level control of described mobile communication terminal 101 is made as maximum.The embodiment of the invention is selected channel to set up conversation to connect each time, all channels that detect multi-media broadcast terminal CMMB when conversation to the interference of video playback.
Alternatively, the front of mobile communication terminal 101 or side are towards antenna 106, and mobile communication terminal 101 keeps 45 degree with the line of antenna 106 and the angle of horizontal direction.
The described video mosaic that obtains, voiceless sound be used for to be analyzed and/or without the frame number of image in video analysis unit 204; Specifically refer to: analyze frame by frame the described video that obtains in the certain hour; Record and occur mosaic, voiceless sound in the frame of described video and/or without the frame number of image.
Analysis result comparing unit 205 compares described analysis result and subjective quality performance criterion, and the output comparative result.Described subjective quality performance criterion comprises: allow to occur mosaic in the frame of described video in described certain hour, without image and/or asonant frame number, suppose to allow to occur mosaic in 30 minutes, be n without image and/or asonant frame number.The certain hour here is the time of choosing wantonly, can be 10 minutes, also can be 30 minutes.Suppose that video analysis unit 204 record occurs mosaic in 30 minutes, is m without the frame number of image and asonant frame, analysis result comparing unit 205 is the relation of m and n relatively, and exports comparative result.If m is greater than n, then the explanation interference is excessive, is not allowing interference range, disturbs in allowed band if m less than n, illustrates.
Above-mentionedly tested the interference of 101 1 talk channels of mobile communication terminal to a video channel video playback, the embodiment of the invention need to be measured all talk channels to the interference of all video playback channels, and method of testing repeats no more with top identical.
Before setting up mobile communication terminal 101 and the conversation of wireless composite tester 103 being connected, the static sensitivity that also needs to test television module in the mobile communication terminal.Described system can also comprise: static sensitivity test cell and sensitivity setup unit.The static sensitivity test cell is for the static sensitivity of testing described mobile communication terminal television module; Reduce gradually the transmitting power of video signal source, obtain video from mobile communication terminal simultaneously, utilize Video processing analyze frame by frame appearance mosaic in the video, without image and/or asonant frame number, until mosaic appears, without image and/or asonant frame number and the frame number n that equals subjective quality performance criterion regulation.If the static sensitivity that measures is bdB.Utilize the sensitivity setup unit, increase gradually the power of described video signal source, so that the sensitivity of described television module increases adB, this moment, the sensitivity of television module was (a+b) dB, the value of a is decided according to concrete test case, and for example a can be 6, and the present invention is not limited according to this.
Fig. 3 is the interference detection method flow chart of embodiment of the invention movement-based communication terminal, and described method comprises:
Step S301: set up the wireless connections between described mobile communication terminal 101 and the video signal source 105, and on described mobile communication terminal 101 display video; Mobile communication terminal 101 is set up wireless connections with video signal source 105 by antenna 107.
Take a TD-SCDMA/CMMB multi-media broadcast terminal as example, selection high-frequency point 794HZ sets up the wireless connections between mobile communication terminal 101 and the video signal source 105, receiving video signals.The video channel of TD-SCDMA/CMMB multi-media broadcast terminal comprises basic, normal, high three Frequency point channels as shown in Figure 4.
Step S302: reduce gradually the power of described video signal source, test the static sensitivity of television module in the described mobile communication terminal; Increase gradually the power of described video signal source, so that the sensitivity of described television module increases adB, a 〉=1.
Reduce gradually the transmitting power of video signal source, obtain video from mobile communication terminal simultaneously, utilize Video processing analyze frame by frame appearance mosaic in the video, without image and/or asonant frame number, until mosaic appears, without image and/or asonant frame number and the frame number n that equals subjective quality performance criterion regulation.If the static sensitivity that measures is bdB.Utilize the sensitivity setup unit, increase gradually the power of described video signal source, so that the sensitivity of described television module increases adB, this moment, the sensitivity of television module was (a+b) dB, the value of a is decided according to concrete test case, and for example a can be 6, and the present invention is not as limit.
Step S303: set up described mobile communication terminal 101 and be connected with the conversation of wireless composite tester; Mobile communication terminal 101 is set up wireless connections with video signal source 105 by antenna 106, make first mobile communication terminal 101 just towards antenna 106, the line of mobile communication terminal 101 and antenna 106 keeps 45 to spend with the angle of horizontal direction.
Setting up described mobile communication terminal 101 is connected with the conversation of wireless composite tester, need to select the channel of mobile communication terminal 101, the communication channel of TD-SCDMA/CMMB multi-media broadcast terminal comprises basic, normal, high three Frequency point communication channels as shown in Figure 5.For example at first selective channel number is 2010.8HZ for the 10054(Frequency point) high-frequency point channel set up conversation and connect.
Step S304: obtain described video from described mobile communication terminal; Can take with high definition video camera 601 video of mobile communication terminal 101, the invention is not restricted to this, can also obtain the video that mobile communication terminal 101 is play by alternate manner.
Step S305: analyze that mosaic, voiceless sound appear in the described video obtain and/or without the frame number of image; To take by the high definition video camera video of mobile communication terminal 101, be transferred in the computer 602, and utilize Video processing software that video is analyzed frame by frame, analyze frame by frame the described video that obtains in the certain hour; Record and occur mosaic, voiceless sound in the frame of described video and/or without the frame number of image.Fig. 6 is the schematic diagram that video was obtained and analyzed to the embodiment of the invention.
Step S306: described analysis result and subjective quality performance criterion are compared, and the output comparative result.Described subjective quality performance criterion comprises: allow to occur mosaic in the frame of described video in described certain hour, without image and/or asonant frame number, suppose to allow to occur mosaic in 30 minutes, be n without image and/or asonant frame number.The certain hour here is the time of choosing wantonly, can be 10 minutes, also can be 30 minutes.Suppose that video analysis unit 204 record occurs mosaic in 30 minutes, is m without the frame number of image and asonant frame, analysis result comparing unit 205 is the relation of m and n relatively, and exports comparative result.If m is greater than n, then the explanation interference is excessive, is not allowing interference range, disturbs in allowed band if m less than n, illustrates.
It is conversing to the interference of video playback with the wireless composite tester of 10054 low frequency point channels by channel number that step S303 has tested mobile communication terminal 101 to step S306.Afterwards, other channel that also will be in selecting Fig. 5, repeating step S303 has tested the interference of mobile communication terminal 101 conversations to video playback to step S306, and the present invention is not giving unnecessary details.
After the Interference Detection of all channels is finished, make the side of mobile communication terminal 101 towards antenna 106, mobile communication terminal 101 keeps 45 degree with the line of antenna 106 and the angle of horizontal direction.Repeating step S303 is to step S306, detect successively at mobile communication terminal 101 and the line of antenna 106 and the angle of horizontal direction and keep in the situation of 45 degree, every channel is set up the conversation connection to the interference of video playback, method of measurement is similar to step S306 to step S303, and the present invention repeats no more.
The useful technique effect of the embodiment of the invention: the interference detection method of mobile communication terminal of the present invention and system can detect in the mobile communication terminal communication module accurately to the interference of television module, and disturbed condition and subjective quality performance criterion compared, guaranteed that mobile communication terminal can watch TV programme normally when conversation.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, can come the relevant hardware of instruction to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process such as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or store-memory body (Random Access Memory, RAM) etc. at random.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; the protection range that is not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the interference detection method of a movement-based communication terminal is characterized in that, described method comprises:
Set up the wireless connections between described mobile communication terminal and the video signal source, and on described mobile communication terminal display video;
Reduce gradually the power of described video signal source, test the static sensitivity of television module in the described mobile communication terminal;
Increase gradually the power of described video signal source, so that the sensitivity of described television module increases adB, a 〉=1;
Setting up described mobile communication terminal is connected with the conversation of wireless composite tester;
Obtain described video from described mobile communication terminal;
Mosaic, voiceless sound appear in the described video that analysis is obtained and/or without the frame number of image;
Described frame number and subjective quality performance criterion are compared, and the output comparative result.
2. the method for claim 1, it is characterized in that, setting up described mobile communication terminal is connected with the conversation of wireless composite tester and comprises: select the channel of described mobile communication terminal to set up described mobile communication terminal and be connected with the conversation of wireless composite tester, and the power level control of described mobile communication terminal is made as maximum.
3. the method for claim 1 is characterized in that, analyzes to occur mosaic, voiceless sound in the described video obtain and comprise without the frame number of image:
Analyze frame by frame the described video that obtains in the certain hour;
Record and occur mosaic, voiceless sound in the frame of described video and/or without the frame number of image.
4. method as claimed in claim 3 is characterized in that, described subjective quality performance criterion comprises:
In described certain hour, allow to occur mosaic in the frame of described video, without image and/or asonant frame number.
5. the Interference Detection system of a movement-based communication terminal is characterized in that, described system comprises:
Video display unit is used for setting up the wireless connections between described mobile communication terminal and the video signal source, and on described mobile communication terminal display video;
The static sensitivity test cell is used for the static sensitivity of testing described mobile communication terminal television module;
The sensitivity setup unit increases the power of described video signal source gradually, so that the sensitivity of described television module increases adB, a 〉=1;
The unit is set up in conversation, is used for setting up described mobile communication terminal and is connected with the conversation of wireless composite tester;
The video acquisition unit is used for obtaining described video from described mobile communication terminal;
The video analysis unit be used for to analyze that mosaic, voiceless sound appear in the described video that obtains and/or without the frame number of image;
The analysis result comparing unit is used for described frame number and subjective quality performance criterion are compared, and the output comparative result.
6. system as claimed in claim 5 is characterized in that,
Described conversation is set up channel that the unit specifically is used for selecting described mobile communication terminal and is set up described mobile communication terminal and be connected with the conversation of wireless composite tester, and the power level control of described mobile communication terminal is made as maximum.
7. system as claimed in claim 5 is characterized in that,
Described video analysis unit, concrete for analyzing frame by frame the described video that obtains in the certain hour; Record and occur mosaic, voiceless sound in the frame of described video and/or without the frame number of image.
8. system as claimed in claim 7 is characterized in that, described subjective quality performance criterion comprises: allow to occur mosaic in the frame of described video in described certain hour, without image and/or asonant frame number.
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| CN102075271B (en) * | 2011-01-11 | 2013-06-26 | 工业和信息化部通信计量中心 | Subjective testing system for evaluating aerial receptivity of mobile phone television terminal |
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