CN108156453A - Judge whether occur the determining method and device of failed point in receiver demodulating process - Google Patents
Judge whether occur the determining method and device of failed point in receiver demodulating process Download PDFInfo
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- CN108156453A CN108156453A CN201711431065.1A CN201711431065A CN108156453A CN 108156453 A CN108156453 A CN 108156453A CN 201711431065 A CN201711431065 A CN 201711431065A CN 108156453 A CN108156453 A CN 108156453A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N2017/006—Diagnosis, testing or measuring for television systems or their details for television sound
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Abstract
The invention discloses a kind of determining method and device for judging whether to occur failed point in receiver demodulating process, this method includes：Test is modulated into radiofrequency signal with audio code stream, wherein, test has fixed frequency or cyclically-varying frequency with audio code stream；In the case where radiofrequency signal is sent to receiver to meet the signal power that receiver normally demodulates, the first audio signal that acquisition receiver demodulates, the parameter of the first audio signal is obtained, and using the parameter of the first audio signal as the parameter of standard audio signal；In the case where radiofrequency signal is exported with specific rule to receiver, the second audio signal that receiver demodulates is acquired, and obtain the parameter of the second audio signal；The parameter of second audio signal with the parameter of standard audio signal is compared, according to comparison result, determines whether failed point occur in receiver demodulating process.
Description
Technical field
The present invention relates to ground digital television signal technical fields, demodulated more particularly, to a kind of judgement receiver
Whether the determining method and device of failed point is occurred in journey.
Background technology
In August, 2006, China promulgate terrestrial DTV transmission standard GB/T 20600-2006 (Digital
Television Terrestrial Multimedia Broadcasting, abbreviation DTMB).In December, 2011, DTMB are formal
International Telecommunication Association's ITU-R BT.1306 recommendations are included in, become global 4th terrestrial DTV international standard.The global first generation
Terrestrial digital TV standard includes：DTMB, the DTMB-A in China, ATSC (the Advanced Television Systems in the U.S.
Committee), European DVB-T (Digital Video Broadcasting-Terrestria) and the ISDB-T of Japan
(Integrated Services Digital Broadcasting)。
For terrestrial DTV receiving device, the test method and test index of its radio-frequency performance defined in national standard.
The basic composition of test system as shown in Figure 1, test system include signal source, DTT signal generators, splitter, interference source, can
Adjusted band-pass filter, adjustable attenuator, combiner, frequency spectrograph, DTT receivers etc..Receiver can be by the image harmony after demodulation
Sound signal is output on TV.Surveyed radio-frequency performance index be by judging that receiver " critical point " obtains, it is " critical
For point " i.e. after certain interference is applied to receiver or after reducing available signal power, receiver can just normal play program
State, useful signal and the power of interference signal will be recorded at this time, and the radio frequencies such as carrier-to-noise ratio, sensitivity are obtained by calculation
Index.There are mainly two types of the determination methods of " critical point ", i.e.,：Bit error rate method (Symbol Error Rate, abbreviation BER) and master
See judge method.
Bit error rate method is the source code flow and the code stream after receiver demodulating and decoding sent out by comparison signal source, then through system
It counts, the bit error rate is calculated.Fig. 2 shows the flow diagrams of bit error rate method in the prior art.Referring to Fig. 2, first, code stream point
Analyzer exports source code flow, and then, source code flow is modulated into radiofrequency signal by radio-frequency signal source, and then, receiver is to the radio frequency
Signal is demodulated, and obtains the code stream after demodulating and decoding, and the code stream after demodulating and decoding is back to Transport Stream Analyzer, finally,
Transport Stream Analyzer is compared the code stream after source code flow and demodulating and decoding, counts, calculates, and finally obtains the bit error rate.When into
When row RF index is tested, such as sensitivity：It can be required according to standard, by gradually adjusting signal power and the bit error rate being carried out real
When monitor, it is possible to determine that whether reached " critical point ", reached rear corresponding signal power, that is, be denoted as the sensitive of the frequency point
Degree.Bit error rate method needs the specific code stream output interface of receiver opening to be judged for Transport Stream Analyzer, at present, more in the market
Number home receiver does not have the interface.
Subjective judgement method is to be output to image on TV as judging basis using DTMB receivers, and this method only needs
One section of dynamic image is played, observer is by judging it is different whether the picture in playing process mosaic, interim card, striped etc. occurs
There is the signal that this state is considered as after receiver demodulation and error code occurs in normal state.It can be required according to standard, by gradually adjusting
Signal power simultaneously carries out observation judgement to the broadcast state of image, can also obtain " critical point " of receiver.But subjective judgement
Method needs tester to watch screen for a long time to be judged, can not carry out automatic test.
Invention content
It is an object of the present invention to provide a kind of determining sides for judging whether to occur failed point in receiver demodulating process
The new solution of method and device.
According to the first aspect of the invention, it provides and a kind of judges failed point whether occur really in receiver demodulating process
Determine method, including：
Test is modulated into radiofrequency signal with audio code stream, wherein, the test with audio code stream have fixed frequency or
Person's cyclically-varying frequency；
In the case where the radiofrequency signal is sent to the receiver to meet the signal power that receiver normally demodulates,
The first audio signal that the receiver demodulates is acquired, obtains the parameter of first audio signal, and by described first
Parameter of the parameter of audio signal as standard audio signal；
In the case where the radiofrequency signal is exported with specific rule to the receiver, acquire the receiver and demodulate
The second audio signal arrived, and obtain the parameter of the second audio signal；
The parameter of second audio signal with the parameter of the standard audio signal is compared, is tied according to comparing
Fruit determines whether failed point occur in the receiver demodulating process.
Optionally, according to comparison result, determine whether failed point occur in the receiver demodulating process, including：
In the case where the parameter of second audio signal and the parameter of the standard audio signal are inconsistent, institute is determined
It states in receiver demodulating process and failed point occurs；
Under the parameter of second audio signal and the parameter unanimous circumstances of the standard audio signal, determine described
Receiver demodulating process is normal.
Optionally,
The specific rule is the output power that the radiofrequency signal is normally demodulated according to receiver is met, and with the first work(
The signal power that rate stepping is successively decreased is sent to the receiver,
After whether there is failed point in determining the receiver demodulating process, the method further includes：
Determine first, second audio signal inconsistent with the parameter of the standard audio signal；
By the radiofrequency signal according to signal power corresponding more than first second audio signal and with the second work(
The signal power of rate step increments is sent to the receiver, wherein, the second power stepping is walked less than first power
Into；
Multiple third audio signals that the receiver demodulates are acquired in real time, and obtain the third audio signal
Parameter；
Parameter of the parameter of each third audio signal respectively with the standard audio signal is compared, determines first
Third audio signal a, consistent with the parameter of the standard audio signal, and first third audio signal is corresponded to
Radiofrequency signal signal power, the sensitivity as the receiver.
Optionally, the parameter of the standard audio signal, the parameter of second audio signal and third audio letter
Number parameter include audio frequency and power.
Optionally, in the inconsistent situation of the parameter of the parameter of other audio signals and the standard audio signal
Under, determine failed point occur in the receiver demodulating process, including：
In the inconsistent situation of the audio frequency of other audio signals and the audio frequency of the standard audio signal
Under, alternatively, in the case where the power of other audio signals and the power of the standard audio signal are inconsistent, alternatively,
It is inconsistent in the audio frequency of the audio frequency and the standard audio signal of other audio signals, and other described audios
In the case that the power of the power of signal and the standard audio signal is inconsistent, it is judged to going out in the receiver demodulating process
Existing failed point.
Optionally, before test is modulated into radiofrequency signal with audio code stream, the method further includes：Make the survey
Audio code stream on probation.
According to the second aspect of the invention, a kind of dress for judging whether to occur failed point in receiver demodulating process is provided
It puts, including：Emit equipment, receiver, audio analyzer and control computer, wherein,
The transmitting equipment is used to test being modulated into radiofrequency signal with audio code stream, and the radiofrequency signal is sent to
The receiver, wherein, the test has fixed frequency or cyclically-varying frequency with audio code stream；
The receiver be used for the radiofrequency signal with meet the signal power that receiver normally demodulates be sent to it is described
In the case of receiver, demodulation obtains the first audio signal；
The audio analyzer is used to acquire first audio signal, obtains the parameter of first audio signal, and
The parameter of first audio signal is sent to the control computer as the parameter of standard audio signal；
The receiver is additionally operable in the case where the radiofrequency signal is exported with specific rule to the receiver, in real time
Demodulation obtains the second audio signal；
The audio analyzer obtains the ginseng of second audio signal for acquiring second audio signal in real time
Number, and the parameter of second audio signal is sent to the control computer；
The control computer be used for by the parameter of the parameter of second audio signal and the standard audio signal into
Row compares, and according to comparison result, determines whether failed point occur in the receiver demodulating process.
Optionally, the control computer is additionally operable to the parameter in second audio signal and the standard audio signal
Parameter it is inconsistent in the case of, determine failed point occur in the receiver demodulating process；
Under the parameter of second audio signal and the parameter unanimous circumstances of the standard audio signal, determine described
Receiver demodulating process is normal.
Optionally, the specific rule is the output power that the radiofrequency signal is normally demodulated according to receiver is met, and
The receiver is sent to the signal power that the first power stepping is successively decreased,
The control computer is additionally operable to determine after whether there is failed point in determining the receiver demodulating process
Go out first, second audio signal inconsistent with the parameter of the standard audio signal；
The transmitting equipment is additionally operable to the radiofrequency signal according to corresponding more than first second audio signal
Signal power and the receiver is sent to the signal power of the second power step increments, wherein, the second power stepping
Less than the first power stepping；
The audio analyzer is additionally operable to acquire multiple third audio signals that the receiver demodulates in real time, and
To the parameter of the third audio signal；
The control computer is additionally operable to the parameter of each third audio signal ginseng with the standard audio signal respectively
Number is compared, and determines first, the third audio signal consistent with the parameter of the standard audio signal, and by described the
Sensitivity of the signal power of the corresponding radiofrequency signal of one third audio signal as the receiver.
Optionally, the parameter of the standard audio signal, the parameter of second audio signal and third audio letter
Number parameter include audio frequency and power.
According to one embodiment of present invention, realize to whether occurring the automation of failed point in receiver demodulating process
Judge, improve testing efficiency and accuracy.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
It is combined in the description and the attached drawing of a part for constitution instruction shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 shows the structure diagram for testing system in the prior art.
Fig. 2 shows the flow diagrams of bit error rate method in the prior art.
Fig. 3, which is shown, according to an embodiment of the invention judges failed point whether occur really in receiver demodulating process
Determine the process chart of method.
Fig. 4 shows the product process signal of the corresponding code stream of test audio signal according to an embodiment of the invention
Figure.
Fig. 5, which is shown, according to an embodiment of the invention judges failed point whether occur really in receiver demodulating process
Determine the structure diagram of device.
Fig. 6, which is shown, according to an embodiment of the invention judges failed point whether occur really in receiver demodulating process
Determine another structure diagram of device.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should be noted that：Unless in addition have
Body illustrates that the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to the present invention
And its application or any restrictions that use.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, technology, method and apparatus should be considered as part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need to that it is further discussed.
An embodiment provides the determining method of failed point whether occur in a kind of receiver demodulating process.
Fig. 3 shows the processing for whether occurring the determining method of failed point in receiver demodulating process according to an embodiment of the invention
Flow chart.Referring to Fig. 3, this method includes at least following steps S301 to step S304.
Test is modulated into radiofrequency signal by step S301 with audio code stream, wherein, test audio code stream has fixed frequency
Rate or cyclically-varying frequency；
Step S302, in radiofrequency signal to meet the situation that the signal power that receiver normally demodulates is sent to receiver
Under, the first audio signal for demodulating of acquisition receiver obtains the parameter of the first audio signal, and by the first audio signal
Parameter of the parameter as standard audio signal；
Step S303, in the case where radiofrequency signal is exported with specific rule to receiver, acquisition receiver demodulates to obtain
The second audio signal, and obtain the parameter of the second audio signal；
The parameter of second audio signal is compared step S304 with the parameter of standard audio signal, is tied according to comparing
Fruit determines whether failed point occur in receiver demodulating process.
The method provided in an embodiment of the present invention for judging whether to occur failed point in receiver demodulating process, realizes docking
Whether receipts machine demodulating process there is the automatization judgement of failed point, improves testing efficiency and accuracy.
In one embodiment of the present of invention, the parameter of standard audio signal includes the audio frequency and work(of the first audio signal
Rate, the parameter of the second audio signal include the audio frequency and power of the second audio signal.
It is inconsistent in the parameter of the second audio signal and the parameter of standard audio signal in one embodiment of the present of invention
In the case of, determine failed point occur in receiver demodulating process；In the parameter of the second audio signal and the ginseng of standard audio signal
Under number unanimous circumstances, determine that receiver demodulating process is normal.
In one embodiment of the present of invention, by the audio frequency of the second audio signal and the audio frequency of standard audio signal
It is compared, the power of the second audio signal is compared with the power of standard audio signal, in the sound of the second audio signal
In the case that the audio frequency of frequent rate and standard audio signal is inconsistent, alternatively, in the power and standard of the second audio signal
In the case that the power of audio signal is inconsistent, alternatively, in the audio frequency of the second audio signal and the sound of standard audio signal
In the case that frequent rate is inconsistent, and the power of the second audio signal and the power of standard audio signal are inconsistent, it is judged to connecing
There is failed point in receipts machine demodulating process.In the audio frequency of the second audio signal and the audio frequency one of standard audio signal
It causes, and under the power unanimous circumstances of the power of the second audio signal and standard audio signal, is determining receiver demodulating process just
Often.
Fig. 4 shows the product process signal of the corresponding code stream of test audio signal according to an embodiment of the invention
Figure.Referring to Fig. 4, first, audio signal source exports test audio signal to encoder, then, survey of the encoder to receiving
Audio signal on probation is encoded, and obtains the corresponding code stream of test audio signal.
In one embodiment of the present of invention, it is sent to meet the signal power that receiver normally demodulates and is connect in radiofrequency signal
In the case of receipts machine, the first audio signal that receiver demodulates is that do not occur abnormal audio signal, that is to say, that is received
Not the problems such as the first audio signal that machine demodulates does not occur modified tone, interim card or is disappeared during broadcasting.
It should be noted that radiofrequency signal not is a fixed letter to meet the signal power that receiver normally demodulates
Number performance number, it is a value range to meet the signal power that receiver normally demodulates.Meet the signal work(that receiver normally demodulates
Rate can be depending on the concrete type of receiver, by taking terrestrial digital receivers as an example, letter that terrestrial digital receivers normally demodulate
Number power is generally in the range of -60~0dBm.In the embodiment of the present invention, from the signal power range for meeting receiver and normally demodulating
One signal power of middle selection, then, radiofrequency signal is sent to receiver according to the signal power selected.
In one embodiment of the present of invention, the testing procedure of the parameter of standard audio signal specifically includes：By test sound
The corresponding code stream of frequency signal is modulated into radiofrequency signal, and the radiofrequency signal is sent out with meeting the signal power that receiver normally demodulates
It send to receiver；After receiver receives the radiofrequency signal, it is demodulated, obtains the first audio signal；Acquire receiver
Demodulate the first obtained audio signal；First audio signal is handled, obtains the parameter of the first audio signal, by the first sound
Parameter of the parameter of frequency signal as standard audio signal.First audio signal is handled, obtains the first audio signal
Parameter can be completed by audio analyzer, and the first audio signal obtained after will demodulating is input to audio analyzer, audio analysis
Instrument handles to obtain the audio frequency and power of the first audio signal by analysis.
In one embodiment of the present of invention, the testing procedure of the parameter of the second audio signal specifically includes：By test sound
The corresponding code stream of frequency signal is modulated into radiofrequency signal, and the radiofrequency signal is sent to receiver with other signal powers, wherein,
Other signal powers are the signal powers for meeting receiver and normally demodulating being different from involved in above-mentioned steps S302；Receiver
After receiving the radiofrequency signal, it is demodulated, obtains the second audio signal；The second audio that acquisition receiver demodulates
Signal；Second audio signal is handled, obtains the parameter of the second audio signal.Second audio signal is handled, is obtained
Parameter to the second audio signal can be completed by audio analyzer, and the second audio signal obtained after will demodulating is input to audio
Analyzer, audio analyzer handle to obtain the audio frequency and power of the second audio signal by analysis.
In one embodiment of the present of invention, test code streams are in addition to including the corresponding code stream of above-mentioned test audio signal, also
Including the corresponding code stream of test vision signal.For including the test code streams of vision signal and audio signal, work as receiver
When signal after demodulation plays out, the image shown on screen will appear damage, such as mosaic, interim card, while sound
Will appear interruption, interim card, modified tone phenomena such as, this just illustrate the receiver determined using vision signal critical radio frequency parameter and
The critical radio frequency parameter of receiver determined using audio signal is with uniformity.
It is provided by the invention to judge that the determining method for whether occurring failed point in receiver demodulating process can be used for determining to connect
The sensitivity of receipts machine or carrier-to-noise ratio.
For determining the sensitivity of receiver, the specific rule that is referred in above-mentioned steps S103 is radiofrequency signal according to full
The output power that sufficient receiver normally demodulates, and receiver is sent to the signal power that the first power stepping is successively decreased.Above-mentioned step
In rapid S103, multiple second audio signals that receiver demodulates are acquired, and obtain the parameter of each second audio signal.It is above-mentioned
In step S104, the parameter of the second audio signal with the parameter of standard audio signal is compared, according to comparison result, is determined
Whether there is failed point in receiver demodulating process.Then, control computer can determine that first, with standard audio signal
The second inconsistent audio signal of parameter.Then, emit equipment by radiofrequency signal according to more than first the second audio signal pair
The signal power answered and receiver is sent to the signal power of the second power step increments, wherein, the second power stepping is less than
First power stepping.Then, audio analyzer acquires multiple third audio signals that receiver demodulates in real time, and obtains
The parameter of three audio signals, and the parameter of third audio signal is sent to control computer.Control computer is by each third sound
The parameter of frequency signal is compared respectively with the parameter of standard audio signal, determines first, the ginseng with standard audio signal
The consistent third audio signal of number, and using the signal power of the corresponding radiofrequency signal of first third audio signal as receiver
Sensitivity.In the embodiment of the present invention, the parameter of third audio signal includes the audio frequency and power of third audio signal.
For determining the carrier-to-noise ratio of receiver, after the parameter of standard audio signal is obtained, radiofrequency signal is to meet
Signal power that receiver normally demodulates, interference source are sent to receiver with the signal power of a certain power step increments.It receives
After machine receives each radiofrequency signal, Real-time demodulation is carried out to it, obtains multiple audio signals.Audio analyzer can be acquired and be connect in real time
Multiple audio signals that receipts machine demodulates, and obtain the parameter of each audio signal.Then, control computer is by each audio signal
Parameter be compared respectively with the parameter of standard audio signal, determine first, differ with the parameter of standard audio signal
The audio signal of cause.Interference source be less than above-mentioned first, it is corresponding with the audio signal that the parameter of standard audio signal is inconsistent
Signal power, and receiver is sent to the signal power that a certain power stepping is successively decreased, until control computer determines the
One, the audio signal consistent with the parameter of standard audio signal, and by first, it is consistent with the parameter of standard audio signal
The ratio of the signal power of the corresponding radiofrequency signal of audio signal and the signal power of interference source, the carrier-to-noise ratio as receiver.
Based on same inventive concept, one embodiment of the invention provide it is a kind of judge receiver demodulation after signal whether
There is the device of error code.Fig. 5 shows whether the signal according to an embodiment of the invention judged after receiver demodulation occurs
The structure diagram of the device of error code.Referring to Fig. 5, which includes at least：Emit equipment 510, receiver 520, audio analysis
Instrument 530 and control computer 540.
Transmitting equipment 510 is used to test being modulated into radiofrequency signal with audio code stream, and radiofrequency signal is sent to reception
Machine, wherein, test has fixed frequency or cyclically-varying frequency with audio code stream.
Receiver 520 is used in radiofrequency signal meet the feelings that the signal power that receiver normally demodulates is sent to receiver
Under condition, demodulation obtains the first audio signal.
Audio analyzer 530 obtains the parameter of the first audio signal for acquiring the first audio signal, and by the first audio
The parameter of signal is sent to control computer as the parameter of standard audio signal.
Receiver 520 is additionally operable in the case where radiofrequency signal is sent to receiver with specific rule, and Real-time demodulation obtains
Second audio signal.
Audio analyzer 530 is used to acquire second audio signal in real time, obtains the parameter of the second audio signal, and will
The parameter of second audio signal is sent to control computer.
Control computer 540 is for the parameter of the second audio signal to be compared with standard parameter, according to comparison result,
Determine whether failed point occur in the receiver demodulating process.
In one embodiment of the present of invention, control computer 540 is additionally operable to control transmitting equipment 510, so that transmitting equipment
Radiofrequency signal is sent to receiver 520 by 510 with different signal powers.
In one embodiment of the present of invention, control computer 540 is additionally operable to the running parameter of control audio analyzer 530.
The running parameter of audio analyzer 530 includes impedance, scan frequency, resolution bandwidth, sweep time.
In one embodiment of the present of invention, the parameter of standard audio signal includes the audio frequency and work(of the first audio signal
Rate, the parameter of the second audio signal include the audio frequency and power of the second audio signal.
In one embodiment of the present of invention, control computer 540 is additionally operable to：By the audio frequency of the second audio signal and
The audio frequency of one audio signal is compared, and the power of the second audio signal and the power of the first audio signal are compared
It is right；In the case where the audio frequency of the second audio signal and the audio frequency of the first audio signal are inconsistent, alternatively, second
In the case that the power of audio signal and the power of the first audio signal are inconsistent, alternatively, in the audio frequency of the second audio signal
The audio frequency of rate and the first audio signal is inconsistent, and the power of the second audio signal and the power of the first audio signal differ
In the case of cause, determine failed point occur in receiver demodulating process.In the audio frequency and standard audio of the second audio signal
The audio frequency of signal is consistent, and under the power unanimous circumstances of the power of the second audio signal and standard audio signal, determines
Receiver demodulating process is normal.
Referring to Fig. 6, which further includes：Audio signal generator 550, transcoder 560 and code stream recorder 570.
Audio signal generator 550 has the audio signal of fixed frequency or cyclically-varying frequency for generating, and
Audio signal is sent to transcoder 560.
Transcoder 560 is used to convert audio signals into audio coding.
Code stream recorder 570 is recorded into audio code stream, and by audio code stream for audio coding and is sent to transmitting equipment.
In one embodiment of the present of invention, in the sensitivity for determining receiver, receiver 520 is used to press in radiofrequency signal
According to the output power for meeting receiver and normally demodulating, and it is sent to the signal power that the first power stepping is successively decreased the feelings of receiver
Under condition, Real-time demodulation obtains each second audio signal.Audio analyzer 530 acquires multiple second audios that receiver demodulates
Signal, and the parameter of each second audio signal is obtained, and the parameter of each second audio signal is sent to control computer 540.
The parameter of second audio signal is compared control computer 540 with the parameter of standard audio signal, according to comparison result, really
Determine whether failed point occur in receiver demodulating process.Then, control computer 540 can determine that first and standard audio
The second inconsistent audio signal of the parameter of signal.Then, the control of control computer 540 transmitting equipment 510, so that transmitting equipment
The radiofrequency signal of 510 transmittings is passed according to the corresponding signal power of more than first the second audio signal and with the second power stepping
The signal power of increasing is sent to receiver 520, wherein, the second power stepping is less than the first power stepping.Then, audio analyzer
530 multiple third audio signals that the demodulation of acquisition receiver 520 obtains in real time, and the parameter of third audio signal is obtained, and will
The parameter of third audio signal is sent to control computer 540.Control computer 540 distinguishes the parameter of each third audio signal
It is compared with the parameter of standard audio signal, determines first, the third audio consistent with the parameter of standard audio signal
Signal, and using the signal power of the corresponding radiofrequency signal of first third audio signal as the sensitivity of receiver.
In one embodiment of the present of invention, in the carrier-to-noise ratio for determining receiver, which further includes interference source.It is obtaining
After the parameter of standard audio signal, radiofrequency signal is to meet signal power, interference source that receiver normally demodulates with a certain work(
The signal power of rate step increments is sent to receiver 520.After receiver 520 receives each radiofrequency signal, it is carried out in real time
Demodulation, obtains multiple audio signals.Audio analyzer 530 can acquire multiple audio signals that receiver demodulates in real time, and
Obtain the parameter of each audio signal.Then, control computer 540 by the parameter of each audio signal respectively with standard audio signal
Parameter is compared, and determines first, the audio signal inconsistent with the parameter of standard audio signal.Then, interference source with
Less than above-mentioned first, signal power corresponding with the audio signal that the parameter of standard audio signal is inconsistent, and with a certain work(
The signal power that rate stepping is successively decreased is sent to receiver 520, until control computer 540 determines first and standard audio
The consistent audio signal of the parameter of signal, and by first, the audio signal consistent with the parameter of standard audio signal it is corresponding
Carrier-to-noise ratio of the ratio of the signal power of radiofrequency signal and the signal power of interference source as receiver.
The present invention can be system, method and/or computer program product.Computer program product can include computer
Readable storage medium storing program for executing, containing for make processor realize various aspects of the invention computer-readable program instructions.
Computer readable storage medium can keep and store to perform the tangible of the instruction that uses of equipment by instruction
Equipment.Computer readable storage medium for example can be-- but be not limited to-- storage device electric, magnetic storage apparatus, optical storage
Equipment, electromagnetism storage device, semiconductor memory apparatus or above-mentioned any appropriate combination.Computer readable storage medium
More specific example (non exhaustive list) includes：Portable computer diskette, random access memory (RAM), read-only is deposited hard disk
It is reservoir (ROM), erasable programmable read only memory (EPROM or flash memory), static RAM (SRAM), portable
Compact disk read-only memory (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanical coding equipment, for example thereon
It is stored with the punch card of instruction or groove internal projection structure and above-mentioned any appropriate combination.Calculating used herein above
Machine readable storage medium storing program for executing is not interpreted instantaneous signal in itself, and the electromagnetic wave of such as radio wave or other Free propagations leads to
It crosses the electromagnetic wave (for example, the light pulse for passing through fiber optic cables) of waveguide or the propagation of other transmission mediums or is transmitted by electric wire
Electric signal.
Computer-readable program instructions as described herein can be downloaded to from computer readable storage medium it is each calculate/
Processing equipment downloads to outer computer or outer by network, such as internet, LAN, wide area network and/or wireless network
Portion's storage device.Network can include copper transmission cable, optical fiber transmission, wireless transmission, router, fire wall, interchanger, gateway
Computer and/or Edge Server.Adapter or network interface in each calculating/processing equipment are received from network to be counted
Calculation machine readable program instructions, and the computer-readable program instructions are forwarded, for the meter being stored in each calculating/processing equipment
In calculation machine readable storage medium storing program for executing.
For perform the computer program instructions that operate of the present invention can be assembly instruction, instruction set architecture (ISA) instruction,
Machine instruction, machine-dependent instructions, microcode, firmware instructions, condition setup data or with one or more programming languages
Arbitrarily combine the source code or object code write, programming language include object-oriented programming language-such as Smalltalk,
Procedural programming languages-such as " C " language or similar programming language of C++ etc. and routine.Computer-readable program refers to
Order can be performed fully, partly performed on the user computer, the software package independent as one on the user computer
Perform, part on the user computer part on the remote computer perform or completely on a remote computer or server
It performs.In situations involving remote computers, remote computer can pass through the network of any kind-include LAN
(LAN) or wide area network (WAN)-be connected to subscriber computer or, it may be connected to outer computer (such as utilizes internet
Service provider passes through Internet connection).In some embodiments, believe by using the state of computer-readable program instructions
Breath comes personalized customization electronic circuit, such as programmable logic circuit, field programmable gate array (FPGA) or programmable logic
Array (PLA), which can perform computer-readable program instructions, so as to fulfill various aspects of the invention.
Referring herein to according to the method for the embodiment of the present invention, the flow chart of device (system) and computer program product and/
Or block diagram describes various aspects of the invention.It should be appreciated that each box and flow chart of flow chart and/or block diagram and/
Or in block diagram each box combination, can be realized by computer-readable program instructions.
These computer-readable program instructions can be supplied to all-purpose computer, special purpose computer or other programmable datas
The processor of processing unit, so as to produce a kind of machine so that these instructions are passing through computer or other programmable datas
When the processor of processing unit performs, produce and realize work(specified in one or more of flow chart and/or block diagram box
The device of energy/action.These computer-readable program instructions can also be stored in a computer-readable storage medium, these refer to
It enables so that computer, programmable data processing unit and/or other equipment work in a specific way, so as to be stored with instruction
Computer-readable medium then includes a manufacture, including realizing in one or more of flow chart and/or block diagram box
The instruction of the various aspects of defined function/action.
Computer-readable program instructions can also be loaded into computer, other programmable data processing units or other
In equipment so that series of operation steps are performed on computer, other programmable data processing units or miscellaneous equipment, with production
Raw computer implemented process, so that performed on computer, other programmable data processing units or miscellaneous equipment
Function/action specified in one or more of flow chart and/or block diagram box is realized in instruction.
Flow chart and block diagram in attached drawing show the system, method and computer journey of multiple embodiments according to the present invention
Architectural framework in the cards, function and the operation of sequence product.In this regard, each box in flow chart or block diagram can generation
One module of table, program segment or a part for instruction, module, program segment or a part for instruction include one or more for real
The executable instruction of logic function as defined in existing.In some implementations as replacements, the function of being marked in box can also
To be different from the sequence marked in attached drawing generation.For example, two continuous boxes can essentially perform substantially in parallel, it
Can also perform in the opposite order sometimes, this is depended on the functions involved.It is also noted that block diagram and/or flow
The combination of each box in figure and the box in block diagram and/or flow chart can use function or action as defined in performing
Dedicated hardware based system is realized or can be realized with the combination of specialized hardware and computer instruction.For this
It is well known that, realized for field technology personnel by hardware mode, realized by software mode and pass through software and hardware
With reference to mode realize it is all of equal value.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.The selection of term used herein, purport
Best explain each embodiment principle, practical application or to the technological improvement in market or make the art its
Its those of ordinary skill is understood that each embodiment disclosed herein.The scope of the present invention is defined by the appended claims.
Claims (10)
- A kind of 1. determining method for judging whether to occur failed point in receiver demodulating process, which is characterized in that including：Test is modulated into radiofrequency signal with audio code stream, wherein, the test has fixed frequency or week with audio code stream Phase property change frequency；In the case where the radiofrequency signal is sent to the receiver to meet the signal power that receiver normally demodulates, acquisition The first audio signal that the receiver demodulates, obtains the parameter of first audio signal, and by first audio Parameter of the parameter of signal as standard audio signal；In the case where the radiofrequency signal is exported with specific rule to the receiver, acquire what the receiver demodulated Second audio signal, and obtain the parameter of the second audio signal；The parameter of second audio signal is compared with the parameter of the standard audio signal, according to comparison result, really Whether there is failed point in the fixed receiver demodulating process.
- 2. according to the method described in claim 1, it is characterized in that, according to comparison result, the receiver demodulating process is determined In whether there is failed point, including：In the case where the parameter of second audio signal and the parameter of the standard audio signal are inconsistent, described connect is determined There is failed point in receipts machine demodulating process；Under the parameter of second audio signal and the parameter unanimous circumstances of the standard audio signal, the reception is determined Machine demodulating process is normal.
- 3. according to the method described in claim 1, it is characterized in that, the specific rule connects for the radiofrequency signal according to satisfaction The output power that receipts machine normally demodulates, and the receiver is sent to the signal power that the first power stepping is successively decreased,After whether there is failed point in determining the receiver demodulating process, the method further includes：Determine first, second audio signal inconsistent with the parameter of the standard audio signal；It is walked by the radiofrequency signal according to signal power corresponding more than first second audio signal and with the second power The receiver is sent into incremental signal power, wherein, the second power stepping is less than the first power stepping；Multiple third audio signals that the receiver demodulates are acquired in real time, and obtain the ginseng of the third audio signal Number；Parameter of the parameter of each third audio signal respectively with the standard audio signal is compared, determine first, The third audio signal consistent with the parameter of the standard audio signal, and penetrate first third audio signal is corresponding Sensitivity of the signal power of frequency signal as the receiver.
- 4. according to the method described in claim 3, it is characterized in that, the parameter of the standard audio signal, second audio The parameter of the parameter of signal and the third audio signal includes audio frequency and power.
- 5. according to the method described in claim 4, it is characterized in that, second audio signal parameter and the standard pronunciation In the case that the parameter of frequency signal is inconsistent, determine failed point occur in the receiver demodulating process, including：In the case where the audio frequency of other audio signals and the audio frequency of the standard audio signal are inconsistent or Person, in the case where the power of other audio signals and the power of the standard audio signal are inconsistent, alternatively, described The audio frequency of other audio signals and the audio frequency of the standard audio signal are inconsistent, and other audio signals In the case that the power of power and the standard audio signal is inconsistent, it is judged to failing in the receiver demodulating process Point.
- 6. according to the method any in claim 1-5, which is characterized in that test is being modulated into radio frequency with audio code stream Before signal, the method further includes：Make the test audio code stream.
- 7. a kind of device for judging whether to occur failed point in receiver demodulating process, which is characterized in that including：Transmitting equipment, Receiver, audio analyzer and control computer, wherein,The transmitting equipment is used to test being modulated into radiofrequency signal with audio code stream, and the radiofrequency signal is sent to described Receiver, wherein, the test has fixed frequency or cyclically-varying frequency with audio code stream；The receiver is used to be sent to the reception in the radiofrequency signal to meet the signal power that receiver normally demodulates In the case of machine, demodulation obtains the first audio signal；The audio analyzer obtains the parameter of first audio signal for acquiring first audio signal, and by institute The parameter for stating the first audio signal is sent to the control computer as the parameter of standard audio signal；The receiver is additionally operable in the case where the radiofrequency signal is exported with specific rule to the receiver, Real-time demodulation Obtain the second audio signal；The audio analyzer is used to acquire second audio signal in real time, obtains the parameter of second audio signal, and The parameter of second audio signal is sent to the control computer；The control computer is used to compare the parameter of second audio signal and the parameter of the standard audio signal It is right, according to comparison result, determine whether failed point occur in the receiver demodulating process.
- 8. device according to claim 7, which is characterized in that the control computer is additionally operable to believe in second audio Number parameter and the standard audio signal parameter it is inconsistent in the case of, determine to lose in the receiver demodulating process It loses a little；Under the parameter of second audio signal and the parameter unanimous circumstances of the standard audio signal, the reception is determined Machine demodulating process is normal.
- 9. device according to claim 7, which is characterized in that the specific rule connects for the radiofrequency signal according to satisfaction The output power that receipts machine normally demodulates, and the receiver is sent to the signal power that the first power stepping is successively decreased,The control computer is additionally operable to determine after whether there is failed point in determining the receiver demodulating process One, second audio signal inconsistent with the parameter of the standard audio signal；The transmitting equipment is additionally operable to the radiofrequency signal according to signal corresponding more than first second audio signal Power and the receiver is sent to the signal power of the second power step increments, wherein, the second power stepping is less than The first power stepping；The audio analyzer is additionally operable to acquire multiple third audio signals that the receiver demodulates in real time, and obtain institute State the parameter of third audio signal；The control computer be additionally operable to by the parameter of each third audio signal respectively with the parameter of the standard audio signal into Row compares, and determines first, the third audio signal consistent with the parameter of the standard audio signal, and by described first Sensitivity of the signal power of the corresponding radiofrequency signal of third audio signal as the receiver.
- 10. device according to claim 9, which is characterized in that the parameter of the standard audio signal, second audio The parameter of the parameter of signal and the third audio signal includes audio frequency and power.
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| CN112449347A (en) * | 2019-09-03 | 2021-03-05 | 国际商业机器公司 | Secure transmission of wireless local area network access codes |
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