CN103905277B - A kind of system detecting method and device - Google Patents

A kind of system detecting method and device Download PDF

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Publication number
CN103905277B
CN103905277B CN201410123974.9A CN201410123974A CN103905277B CN 103905277 B CN103905277 B CN 103905277B CN 201410123974 A CN201410123974 A CN 201410123974A CN 103905277 B CN103905277 B CN 103905277B
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CN201410123974.9A
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CN103905277A (en
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惠卫锋
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华为技术有限公司
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Abstract

The present invention provides a kind of system detecting method and device, is related to the communications field, can carry out real-time system detection, and effectively reduces occupancy of the system to the communication resource, including:Original input signal is inputted into coding/decoding system and the original input signal is sampled, input sample signal is obtained;The primary output signal after multigroup codec unit encoding and decoding in the coding/decoding system is obtained, and the primary output signal is sampled according to position of the input sample signal in the original input signal, output sampled signal is obtained;The correlation of the input sample signal and the output sampled signal is calculated, the correlation represents the output sampled signal and the degree of correlation of the input sample signal;The quality of the coding/decoding system is determined according to the correlation.The system detecting device that the present invention is provided is used for the detection of signal codec mass of system.

Description

A kind of system detecting method and device

Technical field

The present invention relates to the communications field, more particularly to a kind of system detecting method and device.

Background technology

In the telecommunication system, input signal carries out coding and decoding by coding/decoding system and obtains output signal, encoding and decoding system The quality of system is directly connected to the quality of signal, and by taking voice call signal as an example, mass of system is estimated in the prior art Mainly there are a two class methods, a class is sampled by the subjective judgement to communication effect or objective characteristics value, based on largely counting to language The quality of message number is estimated, and the sign path of this method test result is longer, thus can not in time, accurately position failure Point;The another kind of quality for assessing coding/decoding system according to numerical analysis method by injecting test code streams in systems.So-called number Value analytic approach refers to the method for carrying out mass of system assessment using the code stream numerical value of system output signal and system input signal, this The method of kind depends on code stream numerical value, therefore can not damage coding/decoding system suitable for meeting natural destruction code stream numerical value.Also, Test code streams usually need to be transmitted using the resource section in free timeslot in the prior art, and in the peak period of communication service When, user may occupy all resource sections, and the stock number of idle gap is zero, and test code streams are without the resource that can be injected Section, just can not now be estimated to mass of system.

The content of the invention

Embodiments of the invention provide a kind of system detecting method and device, using exporting sampled signal and input sample is believed Number correlation to damaging coding/decoding system and lossless encoding/decoding system can carry out mass of system detection, and based on this profit System can be effectively reduced with the appraisal procedure for carrying out system quality evaluation of signal itself correlation to account for the communication resource With.

To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that:

First aspect there is provided a kind of system detecting method, including:

Original input signal is inputted into coding/decoding system and the original input signal is sampled, input sample is obtained Signal, the coding/decoding system includes multigroup codec unit, and the codec unit is used to enter the original input signal Row coding and decoding;

Primary output signal of the acquisition after multigroup codec unit encoding and decoding in the coding/decoding system, and according to Position of the input sample signal in the original input signal is sampled to the primary output signal, obtains output Sampled signal;

The correlation of the input sample signal and the output sampled signal is calculated, the correlation represents the output The degree of correlation of sampled signal and the input sample signal;

The quality of the coding/decoding system is determined according to the correlation.

It is described to be originally inputted letter to described with reference in a first aspect, in the first possible implementation of first aspect Number sampled, obtain input sample signal, including:

Origin identification is inserted in the original input signal;

Moment where the origin identification described in the original input signal, the input letter in preset time period is obtained Number it is used as the input sample signal;

Accordingly, the position according to the input sample signal in the original input signal is to described original defeated Go out signal to be sampled, obtain output sampled signal, including:

Determine origin identification position described in the primary output signal;

Moment where the origin identification described in the primary output signal, obtain defeated in the preset time period Go out signal as the output sampled signal.

It is described to be originally inputted letter to described with reference in a first aspect, in second of possible implementation of first aspect Number sampled, obtain input sample signal, including:

When the original input signal includes effective message segment and invalid information section, in the pre- of the original input signal If invalid information section in insert origin identification;

Since the moment where the origin identification, the signal in preset time period is obtained in the original input signal Effective information section be used as the input sample signal;

Accordingly, the position according to the input sample signal in the original input signal is to described original defeated Go out signal to be sampled, obtain output sampled signal, including:

Determine origin identification position described in the primary output signal;

Since the moment where the origin identification, obtained in the primary output signal in the preset time period The effective information section of output signal is used as the output sampled signal.

It is described to be originally inputted letter to described with reference in a first aspect, in the third possible implementation of first aspect Number sampled, obtain input sample signal, including:

N characteristic point is obtained from the original input signal and distinguishes corresponding feature and position, the n is to be more than or wait In 2 integer, the characteristic point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal Input signal in period is used as the input sample signal;

Accordingly, the position according to the input sample signal in the original input signal is to described original defeated Go out signal to be sampled, obtain output sampled signal, including:

Judge to whether there is in the primary output signal and there are individual features with the relevant position of the n characteristic point N point;

If the relevant position existed in the primary output signal with the n characteristic point has n point of individual features, Then since the moment where the 1st point of the n point, obtained in the primary output signal in the preset time period Output signal is used as the output sampled signal.

It is described to be originally inputted letter to described with reference in a first aspect, in the 4th kind of possible implementation of first aspect Number sampled, obtain input sample signal, including:

When the original input signal includes effective message segment and invalid information section, from having for the original input signal Imitate and the corresponding feature of n characteristic point difference and position are obtained in message segment, the n is the integer more than or equal to 2, the feature Point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal The effective information section of input signal in period is used as the input sample signal;

Accordingly, the position according to the input sample signal in the original input signal is to described original defeated Go out signal to be sampled, obtain output sampled signal, including:

The relevant position that whether there is in the effective information section for judging the primary output signal with the n characteristic point has There is n point of individual features;

If there is the relevant position to the n characteristic point with corresponding in the effective information section of the primary output signal N point of feature, then since the moment where the 1st point of the n point, obtain described pre- in the primary output signal If the effective information section of the output signal in the period is used as the output sampled signal.

With reference to first aspect, first aspect the first possible implementation to first aspect the 4th kind of possible reality Any one possible implementation in existing mode, in the 5th kind of possible implementation of first aspect,

The correlation that the coding/decoding system is calculated according to the input sample signal and the output sampled signal Including:

By the input sample signal restoring into Natural Sampling form input sample signal;

The output sampled signal is recovered to the output sampled signal of Natural Sampling form;

Sampled according to the output of the input sample signal of the Natural Sampling form and the corresponding Natural Sampling form Signal is calculated by relevance formula and obtains the corresponding correlation of each group codec unit, codec unit pair described in every group The relevance formula that the correlation P that answers is met is:

Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in the input sample signal { x };The yiIt is The corresponding signal value of i-th group of codec unit in the output sampled signal { y }, the n is represented in the coding/decoding system altogether There are n group codec units;

Correlation minimum in the corresponding correlation of each group codec unit is obtained as the coding/decoding system Correlation.

Second aspect, a kind of system detecting device, including:

Sampling unit, for original input signal to be inputted into coding/decoding system and adopted to the original input signal Sample, obtains input sample signal, and the coding/decoding system includes multigroup codec unit, and the codec unit is used for described Original input signal is coded and decoded;

Acquiring unit, it is original defeated after multigroup codec unit encoding and decoding in the coding/decoding system for obtaining Go out signal, and the primary output signal is carried out according to position of the input sample signal in the original input signal Sampling, obtains output sampled signal;

Computing unit, the correlation for calculating the input sample signal and the output sampled signal, the correlation Property represent it is described output sampled signal and the input sample signal degree of correlation;

Quality determination unit, the quality for determining the coding/decoding system according to the correlation.

With reference to second aspect, in the first possible implementation of second aspect,

The sampling unit specifically for:

Origin identification is inserted in the original input signal;

Moment where the origin identification described in the original input signal, the input letter in preset time period is obtained Number it is used as the input sample signal;

Accordingly, the acquiring unit specifically for:

Determine origin identification position described in the primary output signal;

Moment where the origin identification described in the primary output signal, obtain defeated in the preset time period Go out signal as the output sampled signal.

With reference to second aspect, in second of possible implementation of second aspect,

The sampling unit specifically for:

When the original input signal includes effective message segment and invalid information section, in the pre- of the original input signal If invalid information section in insert origin identification;

Since the moment where the origin identification, the signal in preset time period is obtained in the original input signal Effective information section be used as the input sample signal;

Accordingly, the acquiring unit specifically for:

Determine origin identification position described in the primary output signal;

Since the moment where the origin identification, obtained in the primary output signal in the preset time period The effective information section of output signal is used as the output sampled signal.

With reference to second aspect, in the third possible implementation of second aspect,

The sampling unit specifically for:

N characteristic point is obtained from the original input signal and distinguishes corresponding feature and position, the n is to be more than or wait In 2 integer, the characteristic point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal Input signal in period is used as the input sample signal;

Accordingly, the acquiring unit specifically for:

Judge to whether there is in the primary output signal and there are individual features with the relevant position of the n characteristic point N point;

If the relevant position existed in the primary output signal with the n characteristic point has n point of individual features, Then since the moment where the 1st point of the n point, obtained in the primary output signal in the preset time period Output signal is used as the output sampled signal.

With reference to second aspect, in the 4th kind of possible implementation of second aspect,

The sampling unit specifically for:

When the original input signal includes effective message segment and invalid information section, from having for the original input signal Imitate and the corresponding feature of n characteristic point difference and position are obtained in message segment, the n is the integer more than or equal to 2, the feature Point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal The effective information section of input signal in period is used as the input sample signal;

Accordingly, the acquiring unit specifically for:

The relevant position that whether there is in the effective information section for judging the primary output signal with the n characteristic point has There is n point of individual features;

If there is the relevant position to the n characteristic point with corresponding in the effective information section of the primary output signal N point of feature, then since the moment where the 1st point of the n point, obtain described pre- in the primary output signal If the effective information section of the output signal in the period is used as the output sampled signal.

With reference to second aspect, second aspect the first possible implementation to second aspect the 4th kind of possible reality Any one possible implementation in existing mode, in the 5th kind of possible implementation of second aspect,

The computing unit specifically for:

By the input sample signal restoring into Natural Sampling form input sample signal;

The output sampled signal is recovered to the output sampled signal of Natural Sampling form;

Sampled according to the output of the input sample signal of the Natural Sampling form and the corresponding Natural Sampling form Signal is calculated by relevance formula and obtains the corresponding correlation of each group codec unit, codec unit pair described in every group The relevance formula that the correlation P that answers is met is:

Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in the input sample signal { x };The yiIt is The corresponding signal value of i-th group of codec unit in the output sampled signal { y }, the n is represented in the coding/decoding system altogether There are n group codec units;

Correlation minimum in the corresponding correlation of each group codec unit is obtained as the coding/decoding system Correlation.

The present invention provides a kind of system detecting method and device, including:By original input signal input encoding and decoding system Unite and the original input signal is sampled, obtain input sample signal, the coding/decoding system includes multigroup encoding and decoding Unit, the codec unit is used to code and decode the original input signal;Obtain and pass through the encoding and decoding system The primary output signal after multigroup codec unit encoding and decoding in system, and according to the input sample signal described original defeated The position entered in signal is sampled to the primary output signal, obtains output sampled signal;Calculate the input sample letter Number and the output sampled signal correlation, the correlation represents the output sampled signal and input sample signal Degree of correlation;The quality of the coding/decoding system is determined according to the correlation.So, due to being obtained after over-sampling Input sample signal is taken, taking the input sample signal of less signalling path can be transmitted by management passage, without taking Service channel, even therefore can also carry out real-time mass of system detection in the traffic peaks phase, and due to this hair Bright embodiment is focused on analyzing the similarity quantitative evaluation between object using relevance algorithms, is not directly relevant to bit stream data, Therefore no matter the present invention program can be applicable for damaging coding/decoding system or lossless encoding/decoding system, finally, due to this Each encoding and decoding level that inventive embodiments are directed in coding/decoding system calculates a corresponding correlation, therefore works as system Quality can be directly targeted to when being unqualified in the minimum encoding and decoding level of correlation, so as to realize the real-time inspection of mass of system Survey.

Brief description of the drawings

In order to illustrate the technical solution of the embodiments of the present invention more clearly, being used required in being described below to embodiment Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this For the those of ordinary skill of field, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings Accompanying drawing.

Fig. 1 provides a kind of flow chart of system detecting method for the embodiment of the present invention;

Fig. 2 is a kind of structural representation of system detecting device provided in an embodiment of the present invention;

Fig. 3 is the structural representation of another system detecting device provided in an embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.

The embodiment of the present invention provides a kind of system detecting method, applied to system detecting device, as shown in figure 1, including:

Step 101, original input signal is inputted and coding/decoding system and the original input signal sampled, acquisition Input sample signal, the coding/decoding system includes multigroup codec unit, and the codec unit is used for described original defeated Enter signal to be coded and decoded.

System detecting device is sampled to original input signal, obtains input sample signal, and the coding/decoding system includes Multigroup codec unit, and coding and decoding processing is carried out to the original input signal using this multigroup codec unit, wherein Codec unit described in every group includes coding unit and decoding unit corresponding with the coding unit.Original input signal is defeated Enter the signal of the coding/decoding system, multigroup signal is included in the original input signal, multigroup signal correspondence is by above-mentioned multigroup volume Decoding unit carries out coding and decoding processing respectively.

The original output letter of step 102, acquisition after multigroup codec unit encoding and decoding in the coding/decoding system Number, and the primary output signal is adopted according to position of the input sample signal in the original input signal Sample, obtains output sampled signal.

System detecting device is according to position of the input sample signal in the original input signal to described original Output signal is sampled, and sampling herein does not really do resampling to primary output signal, is actually intended to original The output sampling letter on the correspondence position of the position with input sample signal in original input signal is found in beginning output signal Number.

Step 103, the correlation for calculating the input sample signal and the output sampled signal, the correlation are represented The degree of correlation of the output sampled signal and the input sample signal.

During concrete implementation, calculate described herein according to the input sample signal and the output sampled signal The correlation of coding/decoding system can be realized in the following way:

System detecting device can by the input sample signal restoring into Natural Sampling form input sample signal;And The output sampled signal is recovered to the output sampled signal of Natural Sampling form;So as to according to the Natural Sampling form The output sampled signal of input sample signal and the corresponding Natural Sampling form is calculated by relevance formula obtains described The corresponding correlation of each group codec unit, the correlation that the corresponding correlation P of codec unit described in every group is met is public Formula is:

Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in the input sample signal { x };The yiIt is The corresponding signal value of i-th group of codec unit in the output sampled signal { y }, the n is represented in the coding/decoding system altogether There are n group codec units, obtain correlation minimum in the corresponding correlation of each group codec unit and solved as described compile The correlation of code system.

Specifically, due to including multigroup codec unit, every group of codec unit correspondence one in described coding/decoding system Individual encoding and decoding level, the correlation that we calculate coding/decoding system is actually to calculate each encoding and decoding level in the coding/decoding system Correlation, the correlation of each encoding and decoding level is the signal that will carry out encoding and decoding through encoding and decoding level by above-mentioned formula Input state and state output terminal are reduced into Natural Sampling form, so that the signal of Natural Sampling form is put into above-mentioned formula Middle calculating obtains the correlation of the corresponding encoding and decoding level, and last each encoding and decoding level has oneself corresponding correlation, The correlation of minimum is selected in the corresponding correlation of all encoding and decoding level as the correlation of the coding/decoding system.

Step 104, the quality for determining according to the correlation coding/decoding system.

If specifically, the correlation of the system is more than or equal to the first predetermined threshold value, it is determined that the coding/decoding system The quality of encoding and decoding is good;If the correlation of the system is less than the first predetermined threshold value and more than or equal to the described second default threshold Value, it is determined that the FAQ of the encoding and decoding of the coding/decoding system;If the correlation of the system is less than the second predetermined threshold value, Then determine the coding/decoding system encoding and decoding it is off quality, what deserves to be explained is, it is defeated due to during lossy coding The code stream numerical value for entering sampled signal and output sampled signal is naturally inconsistent, so the quality of the coding/decoding system is presentation code The similarity degree between the output signal after input signal and coding and decoding before decoding determines that the correlation of system is exactly table Show the similarity degree between the input signal before coding and decoding and the output signal after coding and decoding.

In embodiments of the present invention, due to obtaining input sample signal after over-sampling, less signalling path is taken Input sample signal can be transmitted by management passage, without take service channel, even therefore in traffic peaks Phase can also carry out real-time mass of system detection, and because the embodiment of the present invention using relevance algorithms focuses on analysis pair As similarity quantitative evaluation, be not directly relevant to bit stream data, therefore no matter the present invention program is for damaging encoding and decoding system System or lossless encoding/decoding system can be applicable, finally, due to which the embodiment of the present invention is directed to each in coding/decoding system Encoding and decoding level all calculates a corresponding correlation, therefore can be directly targeted to correlation when mass of system is unqualified In minimum encoding and decoding level, so as to realize the real-time detection of mass of system.

Original input signal described in the present embodiment can be vision signal, picture signal, audio signal or other Signal, is not limited herein.Present embodiments provide 4 kinds of sides for obtaining input sample signal and corresponding output sampled signal Method, is respectively the first optional embodiment mode, second optional embodiment, the third optional embodiment and the Four kinds of optional embodiments.

In the first optional embodiment, when original input signal and primary output signal are that signal energy significantly becomes The signal of change, it is described that the original input signal is sampled, input sample signal is obtained, can be specifically included:

System detecting device can obtain the corresponding input signal of each group codec unit in the original input signal; Origin identification is inserted in the corresponding input signal of codec unit described in every group;From the corresponding input of codec unit described in every group Moment where origin identification described in signal, the input signal obtained in preset time period is believed as the input sample Number.

Accordingly, it is described that the primary output signal is sampled according to the input sample signal, obtain output and adopt Sample signal, can be specifically included:

System detecting device can obtain the corresponding output signal of each group codec unit in the primary output signal;Really Origin identification position described in the corresponding output signal of codec unit described in fixed every group;From codec unit described in every group Moment where origin identification described in corresponding output signal, the output signal obtained in the preset time period is used as institute State output sampled signal.

So, system detecting device can be by origin identification in the position of original input signal and in original output letter Number aligned in position, more easily get output sampled signal corresponding with input sample signal.

In second of optional embodiment, when original input signal and primary output signal can be divided into effective information When section and invalid information section, effective information section herein refers to the signal segment that signal energy is changed significantly;Invalid signals section is letter Number intermittent phase, the faint signal segment of signal energy.We can assume that signal can be divided into x effective information section and y nothing Message segment is imitated, wherein x and y are positive integer.

It is described that the original input signal is sampled, input sample signal is obtained, can be specifically included:

System detecting device can obtain the corresponding input signal of each group codec unit in the original input signal, institute It is the input signal for inputting coding/decoding system to state original input signal, is made up of the corresponding input signal of multigroup codec unit; When the original input signal includes effective message segment and invalid information section, in the corresponding input of codec unit described in every group Origin identification is inserted in the default invalid information section of signal, the default invalid information section can be selected artificially, as far as possible The chosen distance invalid information section nearer than multiple effective informations section of comparatively dense, and can be got effectively in preset time period Message segment;Since the moment where the origin identification, obtain pre- in the corresponding input signal of codec unit described in every group If the effective information section of the input signal in the period is used as the input sample signal.

It is described that the primary output signal is sampled according to the input sample signal, output sampled signal is obtained, It can specifically include:

System detecting device can obtain the corresponding output signal of each group codec unit in the primary output signal, institute It is that the original input signal is obtained by each group codec unit progress coding and decoding in coding/decoding system to state primary output signal The output signal arrived;Determine origin identification position described in the corresponding output signal of codec unit described in every group;From institute At the moment where stating origin identification, the preset time period is obtained in the corresponding output signal of codec unit described in every group The effective information section of interior output signal is used as the output sampled signal.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device can be by origin identification by the position of the invalid information section of original input signal and in primary output signal The aligned in position of invalid information section, more easily gets output sampled signal corresponding with input sample signal, the input is adopted Sample signal and output sampled signal be all effective information section, therefore, reduce the detection workload in system detectio.

In the third optional embodiment, when original input signal and primary output signal are that signal energy significantly becomes The signal of change, it is described that the original input signal is sampled, input sample signal is obtained, can be specifically included:

System detecting device can obtain the corresponding input signal of each group codec unit in the original input signal;From N characteristic point is obtained in the corresponding input signal of codec unit described in every group and distinguishes corresponding feature and position, the n is big In or equal to 2 integer, the characteristic point is the point with feature;From the moment where the 1st characteristic point of the n characteristic point Start, the input signal in preset time period is obtained in the corresponding input signal of codec unit described in every group as described defeated The input signal entered in sampled signal, the preset time period includes the n characteristic point.

It is described that the primary output signal is sampled according to the input sample signal, output sampled signal is obtained, It can specifically include:

System detecting device can obtain the corresponding output signal of each group codec unit in the primary output signal;Sentence It whether there is the relevant position to the n characteristic point in the corresponding output signal of codec unit described in disconnected every group with corresponding N point of feature;If there is the relevant position with the n characteristic point in the corresponding output signal of codec unit described in every group The n point with individual features, then since the moment where the 1st point of the n point, in codec unit pair described in every group The output signal in the preset time period is obtained in the output signal answered as the output sampled signal, the preset time Output signal in section includes n point for having individual features with the relevant position of the n characteristic point.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device is found with the character pair of n characteristic point in input sample signal and position one by one in primary output signal Corresponding n point, therefore so that with the one-to-one point of character pair and position of the 1st characteristic point in primary output signal Alignment, more easily gets output sampled signal corresponding with input sample signal, therefore, reduces in system detectio Workload is detected, meanwhile, this method does not change original input signal and primary output signal, reduces to original input signal With the interference of primary output signal.

In the 4th kind of optional embodiment, when original input signal and primary output signal can be divided into effective information When section and invalid information section, effective information section herein refers to the signal segment that signal energy is changed significantly;Invalid signals section is letter Number intermittent phase, the faint signal segment of signal energy, we can assume that signal can be divided into x effective information section and y nothing Message segment is imitated, wherein x and y are positive integer.

It is described that the original input signal is sampled, input sample signal is obtained, can be specifically included:

System detecting device can obtain the corresponding input signal of each group codec unit in the original input signal;When When the original input signal includes effective message segment and invalid information section, from the corresponding input letter of codec unit described in every group Number effective information section in obtain n characteristic point and distinguish corresponding feature and position, the n is the integer more than or equal to 2, institute It is the point with feature to state characteristic point;Since the moment where the 1st characteristic point of the n characteristic point, compiled described in every group The effective information section that the input signal in preset time period is obtained in the corresponding input signal of decoding unit is adopted as the input Sample signal, what deserves to be explained is, the effective information section of the input signal of the preset time period includes n characteristic point, described default The effective information section of input signal in period includes the n characteristic point.

Accordingly, it is described that the primary output signal is sampled according to the input sample signal, obtain output and adopt Sample signal, can be specifically included:

System detecting device can obtain the corresponding output signal of each group codec unit in the primary output signal;Sentence With the presence or absence of corresponding to the n characteristic point in the effective information section of the corresponding output signal of codec unit described in disconnected every group Position has n point of individual features;If existing in the effective information section of the corresponding output signal of codec unit described in every group There is n point of individual features with the relevant position of the n characteristic point, then opened from the moment where the 1st point of the n point Begin, effective letter of the output signal in the preset time period is obtained in the corresponding output signal of codec unit described in every group Section is ceased as the output sampled signal, and the effective information section of the output signal in the preset time period includes and the n The relevant position of characteristic point has n point of individual features.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device is found in primary output signal to be had with the relevant position in input sample signal with the n characteristic point N point of individual features, therefore so that the relevant position in primary output signal with the n characteristic point has individual features N point can be alignd with the n characteristic point so that more easily get it is corresponding with input sample signal output sampling Signal, the input sample signal and output sampled signal are all effective information sections, therefore, reduce the detection in system detectio Workload, meanwhile, this method does not change original input signal and primary output signal, reduces to original input signal and original The interference of beginning output signal.

The embodiment of the present invention provides a kind of system detecting method, and applied to system detecting device, the present embodiment is with original defeated Enter signal and exemplified by primary output signal is audio signal, audio signal includes effective information section and invalid information section, audio letter Number can be analog signal or data signal, if audio signal is analog signal, in order to ensure effect and the communication of communication Efficiency, before audio signal is transmitted in coding/decoding system, is encoded to audio signal;If audio signal is digital letter Number, then inputted directly as original input signal.Present embodiment assumes that the audio signal is analog signal, coding/decoding system has m Group codec unit, including:

Step 201, original input signal is inputted and coding/decoding system and the original input signal sampled, acquisition Input sample signal.

Present embodiment assumes that the sample mode that system detecting device obtains original input signal is the pcm encoder of 8 bits Mode, pcm encoder main process is to be sampled the analog signals such as speech, image at regular intervals, makes its discretization, together When by sample value by layered units round quantify, while sample value is represented into sampling pulse by one group of binary code Amplitude, what deserves to be explained is, the input time that staff can rule of thumb preset original input signal causes this original Input signal is subjected to the codec unit of each in coding/decoding system and coded and decoded.

Due to being that by taking audio signal as an example, i.e., described original input signal is audio signal herein, then this is originally inputted letter It number can be divided into effective information section and invalid information section.In order to ensure Detection results close to practical communication effect, system detectio dress Effective information section can be chosen emphatically as input sample signal by putting.

In the prior art, the transmission of original input signal is that by the way of multiplex communication, time-division multiplex technology is Different signals was interweaved within the different periods, along same transmission;Some way is used again in receiving terminal, Signal extraction in each period is come out to the communication technology for being reduced into primary signal.This technology can be in same channel Upper transmission multiple signals, original input signal be in coding/decoding system the corresponding output signal of every group of codec unit combine and Into, so detection means obtained in original input signal each group of codec unit in coding/decoding system correspond to one it is defeated Go out signal, m group codec units correspond to m output signal, and original input signal is interweaved by this m output signal Different time sections are along same transmission.

Specifically, system detecting device, which is obtained, the corresponding m input letter of m group codec units in original input signal Number.The present embodiment is by taking the corresponding input signal of pth group codec unit as an example, and 0<p<m.System detecting device can be in the correspondence Input signal prepending non-significant message segment in close to effective information section position insertion origin identification, the position of the origin identification It can artificially select, select as far as possible close to the near invalid information section of multiple effective informations section than comparatively dense, and default Effective information section can be got in period.Under normal circumstances, origin identification is pulse vector, and the pulse vector can be Pulse, high-amplitude value signal etc.;Since the moment where the origin identification, when obtaining default in the corresponding input signal Between input signal in section effective information section as input sample signal, the m input signals correspond to m input sample and believe Number.What deserves to be explained is, the corresponding input sample signal of every group of codec unit is all obtained in the same way, by m Input sample signal is used as m input sample signal.

Step 202, by input sample signal restoring into Natural Sampling form input sample signal.

The present embodiment by taking the input sample signal of pth group codec unit as an example, by input sample signal by with input The decoding process that the coded system of sampled signal is corresponding is decoded, and obtains the input sample signal of Natural Sampling form, should Natural Sampling form refers to un-encoded and decoded transform signal form, it is assumed that input sample signal is before coding and decoding It is the form of analog signal, then the input sample signal of Natural Sampling is also the form of analog signal.The present embodiment is with audio Exemplified by the pcm encoder mode for the bit of use 8 that signal is transmitted in coding/decoding system, corresponding decoding process is PCM decodings Mode.What deserves to be explained is, the input sample signal of every group of codec unit is all to be recovered to nature with identical decoding process The input sample signal of sampling.

The original output letter of step 203, acquisition after multigroup codec unit encoding and decoding in the coding/decoding system Number, and the primary output signal is adopted according to position of the input sample signal in the original input signal Sample, obtains output sampled signal.

System detecting device obtains m output signal corresponding with m group codec units in primary output signal, with pth Exemplified by the corresponding output signal of group codec unit, system detecting device determines the origin identification institute of the correspondence output signal At the moment, initial marking can be pulse, high-amplitude value signal etc.;It is corresponding at this since the moment where origin identification The output signal in the preset time period is obtained in output signal as output sampled signal.What deserves to be explained is, every group of volume The corresponding output sampled signal of decoding unit is all obtained in the same way, and the output sampled signal is adopted as output Sample signal.

Specifically, assuming that origin identification is pulse, according to the sequencing of output, it is assumed that the corresponding output signal Invalid information section has w sections, whether there is in j-th of invalid information section for judging the corresponding output signal of pth group codec unit Pulse, the j is less than or equal to w, can be true if there is pulse in j-th of invalid information section of the correspondence output signal At the time of the origin identification of fixed original output signal output, since the moment where pulse, obtain pre- in the output signal If the effective information section of the output signal of period is as output sampled signal, the preset time period and input sample it is default when Between section it is identical;If pulse is not present in j-th of invalid information section of primary output signal, continuation judges the invalid letter of jth+1 Cease section whether there is pulse, until get more than output sampled signal, use judge single pulse method obtain m groups volume solve The corresponding m output sampled signal of code unit, regard the output sampled signal as output sampled signal.What deserves to be explained is, After primary output signal is obtained, in addition it is also necessary to remove all starting marks inserted in input sample signal and primary output signal Know, to avoid interference of the origin identification to input sample signal and output sampled signal.

Step 204, sampled signal will be exported it is recovered to the output sampled signal of Natural Sampling form.

By taking the output sampled signal of pth group codec unit as an example, output sampled signal is passed through with exporting sampled signal The corresponding decoding process of coded system decoded, obtain the output sampled signal of Natural Sampling form.The present embodiment with Exemplified by the pcm encoder mode for the bit of use 8 that audio signal is transmitted in coding/decoding system, corresponding decoding process is PCM Decoding process.What deserves to be explained is, the output sampled signal of every group of codec unit is recovered to identical decoding process The output sampled signal of Natural Sampling.

Step 205, the input sample signal according to the Natural Sampling form and the corresponding Natural Sampling form Output sampled signal is calculated by relevance formula and obtains the corresponding correlation of each group codec unit.

System detecting device is according to the input sample signal and corresponding m Natural Sampling form of m Natural Sampling form Output sampled signal corresponded to and calculated respectively by relevance formula, obtain the m groups codec unit and distinguish corresponding Correlation, the corresponding correlation P of codec unit described in every group meets the relevance formula and is:

Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in input sample signal { x };The yiIt is output The corresponding signal value of i-th group of codec unit in sampled signal { y }, the n represents that n groups are had in the coding/decoding system compiles solution Code unit;Correlation minimum in the corresponding correlation of each group codec unit is obtained as the phase of the coding/decoding system Guan Xing.

Step 206, the quality for determining according to the correlation coding/decoding system.

In actual applications, the relevance values of the system can judge the system by being compared with predetermined threshold value The quality of quality, specifically, the predetermined threshold value can be including but not limited to following:First threshold is 0.85, the second threshold It is worth for 0.7.If correlation P >=0.85 of the system, it is determined that the quality of the encoding and decoding of coding/decoding system is good;If the system > P >=0.7 of correlation 0.85, it is determined that the FAQ of the encoding and decoding of coding/decoding system;If the correlation P < 0.7 of the system, Then the encoding and decoding of determination coding/decoding system is off quality.

What deserves to be explained is, if one or several correlations are less than second in the corresponding correlation of all groups of codec units Threshold value, the then codec unit that staff can go wrong quickly through correlation determination, for the codec unit Circuit repaired, so reduce the workload repaired after detection.

Special instruction, when original input signal and primary output signal are vision signals, vision signal is signal energy Measure significant changes, input sample signal is, system detecting device can in original input signal every kind of codec unit pair The optional position insertion origin identification for the input signal answered, obtains the defeated of preset time period the moment where the origin identification Enter signal;It is that system detecting device can the corresponding output of every kind of codec unit in primary output signal to export sampled signal Signal inquires about the origin identification of input sample signal, and the moment where origin identification obtains the output signal of the preset time period

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device can be by origin identification by the position of the invalid information section of original input signal and in primary output signal The aligned in position of invalid information section, gets output sampled signal corresponding with input sample signal, believes further according to input sample Number and output sampled signal correlation, determine the quality of coding/decoding system, rather than the recovery code stream in idling-resource System communication money when the bit error rate calculated with detection code flowmeter is to determine the quality of coding/decoding system, therefore reduce system detectio The occupancy in source, simultaneously because input sample signal and output sampled signal are obtained from original input signal and primary output signal Take, also ensure that the real-time for determining detection.

In embodiments of the present invention, due to obtaining input sample signal after over-sampling, less signalling path is taken Input sample signal can be transmitted by management passage, without take service channel, even therefore in traffic peaks Phase can also carry out real-time mass of system detection, and because the embodiment of the present invention using relevance algorithms focuses on analysis pair As similarity quantitative evaluation, be not directly relevant to bit stream data, therefore no matter the present invention program is for damaging encoding and decoding system System or lossless encoding/decoding system can be applicable, finally, due to which the embodiment of the present invention is directed to each in coding/decoding system Encoding and decoding level all calculates a corresponding correlation, therefore can be directly targeted to correlation when mass of system is unqualified In minimum encoding and decoding level, so as to realize the real-time detection of mass of system.

The embodiment of the present invention provides a kind of system detecting method, and applied to system detecting device, the present embodiment is with original defeated Enter signal and exemplified by primary output signal is audio signal, audio signal can be divided into effective information section and invalid information section, sound Frequency signal can be analog signal or data signal, if audio signal is analog signal, in order to ensure the effect of communication and lead to The efficiency of letter, before audio signal is transmitted in coding/decoding system, is encoded to audio signal;If audio signal is numeral Signal, then input directly as original input signal.Present embodiment assumes that the audio signal is analog signal, coding/decoding system has M group codec units, including:

Step 301, original input signal is inputted and coding/decoding system and the original input signal sampled, acquisition Input sample signal.

Present embodiment assumes that the sample mode that system detecting device obtains original input signal is the pcm encoder of 8 bits Mode, pcm encoder main process is to be sampled the analog signals such as speech, image at regular intervals, makes its discretization, together When by sample value by layered units round quantify, while sample value is represented into sampling pulse by one group of binary code Amplitude.What deserves to be explained is, the input time that staff can rule of thumb preset original input signal causes this original Input signal is subjected to the codec unit of each in coding/decoding system and coded and decoded.

Due to being that by taking audio signal as an example, i.e., described original input signal is audio signal herein, then this is originally inputted letter It number can be divided into effective information section and invalid information section, in order to ensure Detection results close to practical communication effect, system detectio dress Effective information section can be chosen emphatically as input sample signal by putting.

In the prior art, the transmission of original input signal is that by the way of multiplex communication, time-division multiplex technology is Different signals was interweaved within the different periods, along same transmission;Some way is used again in receiving terminal, Signal extraction in each period is come out to the communication technology for being reduced into primary signal.This technology can be in same channel Upper transmission multiple signals, original input signal be in coding/decoding system the corresponding input signal of every group of codec unit combine and Into, so detection means obtained in original input signal each group of codec unit in coding/decoding system correspond to one it is defeated Enter signal, m group codec units correspond to m input signal, and original input signal is interweaved by this m input signal Different time sections are along same transmission.

Specifically, system detecting device, which is obtained, the corresponding m input letter of m group codec units in original input signal Number.By taking the corresponding input signal of pth group codec unit as an example, system detecting device can be obtained arbitrarily or according to preset rules N characteristic point, which is obtained, in the effective information section for taking the corresponding input signal of pth group codec unit distinguishes corresponding feature and position Put, this feature point can be the point that certain feature is protruded in effective information section, and the corresponding feature of this feature point can be the point The size of upper corresponding signal intensity, the corresponding position of this feature point can be this position residing in input signal section Put.During concrete implementation, the n characteristic point can be expressed as the point that some features are protruded in input signal section, such as n Individual maximum point, n minimum point, the mixing of n-1 maximum and 1 minimum point etc., system detecting device can be from n At the moment where the 1st characteristic point in individual characteristic point, obtain defeated in preset time period in the corresponding input signal Enter the effective information section of signal as input sample signal, the preset time period is the time range according to where n characteristic point Determine, the effective information of the input signal in preset time period section must include n characteristic point.What deserves to be explained is, The input sample signal of every group of codec unit is obtained with the identical above method.

Step 302, by input sample signal restoring into Natural Sampling form input sample signal.

The present embodiment by taking the input sample signal of pth group codec unit as an example, by input sample signal by with input The decoding process that the coded system of sampled signal is corresponding is decoded, and obtains the input sample signal of Natural Sampling form, should Natural Sampling form refers to un-encoded and decoded transform signal form, it is assumed that input sample signal is before coding and decoding It is the form of analog signal, then the input sample signal of Natural Sampling is also the form of analog signal.The present embodiment is with audio Exemplified by the pcm encoder mode for the bit of use 8 that signal is transmitted in coding/decoding system, corresponding decoding process is PCM decodings Mode.What deserves to be explained is, the input sample signal of every group of codec unit is all to be recovered to nature with identical decoding process The input sample signal of sampling.

The original output letter of step 303, acquisition after multigroup codec unit encoding and decoding in the coding/decoding system Number, and the primary output signal is adopted according to position of the input sample signal in the original input signal Sample, obtains output sampled signal.

Assuming that there are m group codec units in coding/decoding system, there is m individual corresponding with codec unit in output sampled signal Output signal, by taking the corresponding output signal of pth group codec unit as an example, system detecting device judges every group of codec unit pair It whether there is and the n characteristic point corresponding feature of difference and the one-to-one n in position in the effective information section for the output signal answered It is individual, if existing and the n corresponding spy of characteristic point difference in the effective information section of the corresponding output signal of every group of codec unit Seek peace the one-to-one n point in position, then since the moment where the 1st point of n point, in pth group codec unit correspondence Output signal in obtain output signal in the preset time period effective information section as output sampled signal, be worth saying Bright, the output sampled signal of every group of codec unit is all that method described above is obtained.

System detecting device judges to whether there is and n in the effective information section of the corresponding output signal of every group of codec unit The method of the individual characteristic point one-to-one n point of corresponding feature and position respectively has a lot.For example, feature point feature is identical Identical method of method, characteristic point position etc..The identical method of characteristic point that the present embodiment is used.

Optionally, when method identical using feature point feature, system detecting device obtains n and n feature point feature one Corresponding point, judges whether the position of n characteristic point corresponds with the position of n point;If position and the n of n characteristic point The position of individual point is corresponded, then since the moment where the 1st point of n point, in the corresponding output of this group of codec unit In signal obtain preset time period in output signal effective information section as output sampled signal, the preset time period with it is defeated Enter the sampling time identical;If the 1st does not correspond to the position of n-th of characteristic point and the position of n second feature point, right 2nd to (n+1)th second feature point is judged, above procedure is repeated, until getting output sampled signal.It is defeated to m Go out signal and the corresponding m output sampled signal of m group codec units is obtained using the identical method of feature point feature, the output is adopted Sample signal is used as output sampled signal.

Optionally, when using characteristic point position identical method, system detecting device obtains n and a pair of characteristic point position 1 The point answered, judges whether the feature of n characteristic point corresponds with the feature of n point;If the feature of n characteristic point and n point Feature correspond, then since the 1st point of the n point place moment, in the corresponding output signal of this group of codec unit The effective information section of output signal in middle acquisition preset time period is as output sampled signal, and the preset time period is adopted with input The sample time is identical;If the 1st feature to n-th of characteristic point and the feature of n point are not corresponded, to the 2nd to (n+1)th Individual second feature point is judged, above procedure is repeated, until getting output sampled signal.M output signal is used special Levy the identical method in a position to obtain the corresponding m output sampled signal of m group codec units, using the output sampled signal as defeated Go out sampled signal.

Step 304, sampled signal will be exported it is recovered to the output sampled signal of Natural Sampling form.

By taking the output sampled signal of pth group codec unit for exporting sampled signal as an example, output sampled signal is passed through The decoding process corresponding with the coded system of input sample signal is decoded, and obtains the output sampling letter of Natural Sampling form Number.The present embodiment is corresponding in the pcm encoder mode for the bit of use 8 that audio signal is transmitted in coding/decoding system as an example Decoding process is PCM decoding processes.What deserves to be explained is, export the output sampled signal of every group of codec unit of sampled signal All it is the output sampled signal that Natural Sampling is recovered to identical decoding process.

Step 305, the input sample signal according to the Natural Sampling form and the corresponding Natural Sampling form Output sampled signal is calculated by relevance formula and obtains the corresponding correlation of each group codec unit.

System detecting device is according to the input sample signal and corresponding m Natural Sampling form of m Natural Sampling form Output sampled signal by relevance formula respectively correspond to calculated, obtain the corresponding correlation of the m groups codec unit Property, the corresponding correlation P of codec unit described in every group meets the relevance formula and is:

Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in input sample signal { x };The yiIt is output The corresponding signal value of i-th group of codec unit in sampled signal { y }, the n represents that n groups are had in the coding/decoding system compiles solution Code unit;Correlation minimum in the corresponding correlation of each group codec unit is obtained as the phase of the coding/decoding system Guan Xing.

Step 306, the quality for determining according to the correlation coding/decoding system.

In actual applications, the relevance values of the system can judge the system by being compared with predetermined threshold value The quality of quality, specifically, the predetermined threshold value can be including but not limited to following:First threshold is 0.85, the second threshold It is worth for 0.7.If correlation P >=0.85 of the system, it is determined that the quality of the encoding and decoding of coding/decoding system is good;If the system > P >=0.7 of correlation 0.85, it is determined that the FAQ of the encoding and decoding of coding/decoding system;If the correlation P < 0.7 of the system, Then the encoding and decoding of determination coding/decoding system is off quality.

What deserves to be explained is, if one or several correlations are less than second in the corresponding correlation of all groups of codec units Threshold value, the then codec unit that staff can go wrong quickly through correlation determination, for the codec unit Circuit repaired, so reduce the workload repaired after detection.

Special instruction, when original input signal and primary output signal are vision signals, vision signal is signal energy The signal of significant changes is measured, input sample signal is that system detecting device can be from the corresponding input signal of every group of codec unit It is middle to obtain the corresponding feature of n characteristic point difference and position, since the moment where the 1st characteristic point of n characteristic point, every The input signal in preset time period is obtained in the corresponding input signal of group codec unit;If it is every group of volume to export sampled signal There is the point individual with the n characteristic point corresponding feature of difference and the one-to-one n in position in the corresponding output signal of decoding unit, Then system detecting device can be corresponding in codec unit described in every group since the moment where the 1st point of the n point The output signal in the preset time period is obtained in output signal.

So, system detecting device is looked into the corresponding output signal of every group of codec unit of primary output signal Look for the one-to-one n point of the n characteristic point corresponding feature of difference and position, so as to obtain output sampled signal, further according to The correlation of input sample signal and output sampled signal, determines the quality of coding/decoding system, rather than according in idling-resource Recovery code stream and the detection code flowmeter bit error rate that calculates determine the quality of coding/decoding system, therefore when reducing system detectio The occupancy of the system communication resource, simultaneously because input sample signal and output sampled signal are all from original input signal and original What output signal was obtained, it also ensure that the real-time for determining detection.

In embodiments of the present invention, due to obtaining input sample signal after over-sampling, less signalling path is taken Input sample signal can be transmitted by management passage, without take service channel, even therefore in traffic peaks Phase can also carry out real-time mass of system detection, and because the embodiment of the present invention using relevance algorithms focuses on analysis pair As similarity quantitative evaluation, be not directly relevant to bit stream data, therefore no matter the present invention program is for damaging encoding and decoding system System or lossless encoding/decoding system can be applicable, finally, due to which the embodiment of the present invention is directed to each in coding/decoding system Encoding and decoding level all calculates a corresponding correlation, therefore can be directly targeted to correlation when mass of system is unqualified In minimum encoding and decoding level, so as to realize the real-time detection of mass of system.

The embodiment of the present invention provides a kind of system detecting device 40, as shown in Fig. 2 including:

Sampling unit 402, for original input signal to be inputted into coding/decoding system and carried out to the original input signal Sampling, obtains input sample signal, and the coding/decoding system includes multigroup codec unit, and the codec unit is used for institute Original input signal is stated to be coded and decoded.

Acquiring unit 404, for obtaining the original after multigroup codec unit encoding and decoding in the coding/decoding system Beginning output signal, and according to position of the input sample signal in the original input signal to the primary output signal Sampled, obtain output sampled signal.

Computing unit 406, the correlation for calculating the input sample signal and the output sampled signal, the phase Closing property represents the output sampled signal and the degree of correlation of the input sample signal.

Quality determination unit 408, the quality for determining the coding/decoding system according to the correlation.

The computing unit 406 can be specifically for:

By the input sample signal restoring into Natural Sampling form input sample signal;

The output sampled signal is recovered to the output sampled signal of Natural Sampling form;

Sampled according to the output of the input sample signal of the Natural Sampling form and the corresponding Natural Sampling form Signal is calculated by relevance formula and obtains the corresponding correlation of each group codec unit, codec unit pair described in every group The relevance formula that the correlation P that answers is met is:

Wherein, the xi is the corresponding signal value of i-th group of codec unit in the input sample signal { x };The yi It is the corresponding signal value of i-th group of codec unit in the output sampled signal { y }, the n is represented in the coding/decoding system Shared n group codec units;

Correlation minimum in the corresponding correlation of each group codec unit is obtained as the coding/decoding system Correlation.

In embodiments of the present invention, because sampling unit 402 obtains input sample signal after over-sampling, take compared with The input sample signal of few signalling path can be transmitted by management passage, without taking service channel, even therefore logical Communication service peak period can also carry out real-time mass of system detection, and because computing unit 406 is closed using relevance algorithms The similarity quantitative evaluation between analysis object is noted, is not directly relevant to bit stream data, therefore no matter the present invention program is for having Damaging coding/decoding system or lossless encoding/decoding system can be applicable, finally, due to which computing unit of the present invention 406 is directed to encoding and decoding Each encoding and decoding level in system calculates a corresponding correlation, therefore can be straight when mass of system is unqualified Connect and navigate in the minimum encoding and decoding level of correlation, so as to realize the real-time detection of mass of system.

Original input signal described in the present embodiment can be vision signal, picture signal, audio signal or other Signal, is not limited herein.For different signal sources, sampling unit 402 obtains input according to the characteristics of original input signal Sampled signal is also different.

Optionally, when original input signal is the signal that signal energy changes highly significant, the sampling unit 402 is specific For:

Origin identification is inserted in the original input signal;

Moment where the origin identification described in the original input signal, the input letter in preset time period is obtained Number it is used as the input sample signal;

Accordingly, the acquiring unit 404 specifically for:

Determine origin identification position described in the primary output signal;

Moment where the origin identification described in the primary output signal, obtain defeated in the preset time period Go out signal as the output sampled signal.

So, system detecting device can be by origin identification in the position of original input signal and in original output letter Number aligned in position, more easily get output sampled signal corresponding with input sample signal.

Optionally, when original input signal includes effective message segment and invalid information section, the sampling unit 402 is specifically used In:

Origin identification is inserted in the default invalid information section of the original input signal;

Since the moment where the origin identification, the signal in preset time period is obtained in the original input signal Effective information section be used as the input sample signal;

Accordingly, the acquiring unit 404 specifically for:

Determine origin identification position described in the primary output signal;

Since the moment where the origin identification, obtained in the primary output signal in the preset time period The effective information section of output signal is used as the output sampled signal.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device can be by origin identification by the position of the invalid information section of original input signal and in primary output signal The aligned in position of invalid information section, more easily gets output sampled signal corresponding with input sample signal, the input is adopted Sample signal and output sampled signal be all effective information section, therefore, reduce the detection workload in system detectio.

Optionally, when original input signal is the signal that signal energy changes highly significant, the sampling unit 402 is specific For:

N characteristic point is obtained from the original input signal and distinguishes corresponding feature and position, the n is to be more than or wait In 2 integer, the characteristic point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal Input signal in period is used as the input sample signal;

Accordingly, the acquiring unit 404 specifically for:

Judge to whether there is in the primary output signal and there are individual features with the relevant position of the n characteristic point N point;

If the relevant position existed in the primary output signal with the n characteristic point has n point of individual features, Then since the moment where the 1st point of the n point, obtained in the primary output signal in the preset time period Output signal is used as the output sampled signal.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device finds n point for having individual features with the relevant position of the n characteristic point in primary output signal, Therefore so that have in primary output signal with the relevant position of the n characteristic point individual features n point can with it is described The alignment of n characteristic point, more easily gets output sampled signal corresponding with input sample signal, therefore, reduces and is being Detection workload in system detection, meanwhile, this method does not change original input signal and primary output signal, reduces to original The interference of beginning input signal and primary output signal.

Optionally, when original input signal include effective section and invalid section, the sampling unit 402 specifically for:

N characteristic point, which is obtained, from the effective information section of the original input signal distinguishes corresponding feature and position, institute It is the integer more than or equal to 2 to state n, and the characteristic point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal The effective information section of input signal in period is used as the input sample signal;

Accordingly, the acquiring unit 404 specifically for:

The relevant position that whether there is in the effective information section for judging the primary output signal with the n characteristic point has There is n point of individual features;

If there is the relevant position to the n characteristic point with corresponding in the effective information section of the primary output signal N point of feature, then since the moment where the 1st point of the n point, obtain described pre- in the primary output signal If the effective information section of the output signal in the period is used as the output sampled signal.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device finds n point for having individual features with the relevant position of the n characteristic point in primary output signal, Therefore so that have in primary output signal with the relevant position of the n characteristic point individual features n point can with it is described The alignment of n characteristic point, more easily gets output sampled signal corresponding with input sample signal, the input sample signal and Output sampled signal is all effective information section, therefore, reduces the detection workload in system detectio, meanwhile, this method does not have There are change original input signal and primary output signal, reduce system detectio process and original input signal and original output are believed Number interference.

The embodiment of the present invention provides a kind of system detecting device 50, as shown in figure 3, including:

Processor 501, for original input signal to be inputted into coding/decoding system and adopted to the original input signal Sample, obtains input sample signal, and the coding/decoding system includes multigroup codec unit, and the codec unit is used for described Original input signal is coded and decoded.

The processor 501, is additionally operable to compile solution by multigroup codec unit in the coding/decoding system for obtaining Primary output signal after code, and according to position of the input sample signal in the original input signal to described original Output signal is sampled, and obtains output sampled signal.

The processor 501, is additionally operable to calculate the correlation of the input sample signal and the output sampled signal, institute State correlation and represent the output sampled signal and the degree of correlation of the input sample signal.

The processor 501 specifically for:

By the input sample signal restoring into Natural Sampling form input sample signal;

The output sampled signal is recovered to the output sampled signal of Natural Sampling form;

Sampled according to the output of the input sample signal of the Natural Sampling form and the corresponding Natural Sampling form Signal is calculated by relevance formula and obtains the corresponding correlation of each group codec unit, codec unit pair described in every group The relevance formula that the correlation P that answers is met is:

Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in the input sample signal { x };The yiIt is The corresponding signal value of i-th group of codec unit in the output sampled signal { y }, the n is represented in the coding/decoding system altogether There are n group codec units;

Correlation minimum in the corresponding correlation of each group codec unit is obtained as the coding/decoding system Correlation.

The processor 501, is additionally operable to determine the quality of the coding/decoding system according to the correlation.

In embodiments of the present invention, due to obtaining input sample signal after over-sampling, less signalling path is taken Input sample signal can be transmitted by management passage, without take service channel, even therefore in traffic peaks Phase can also carry out real-time mass of system detection, and because the embodiment of the present invention using relevance algorithms focuses on analysis pair As similarity quantitative evaluation, be not directly relevant to bit stream data, therefore no matter the present invention program is for damaging encoding and decoding system System or lossless encoding/decoding system can be applicable, finally, due to which the embodiment of the present invention is directed to each in coding/decoding system Encoding and decoding level all calculates a corresponding correlation, therefore can be directly targeted to correlation when mass of system is unqualified In minimum encoding and decoding level, so as to realize the real-time detection of mass of system.

Original input signal described in the present embodiment can be vision signal, picture signal, audio signal or other Signal, is not limited herein.It is also different that the processor 501, which obtains input sample signal according to the characteristics of original input signal, 's.

Optionally, when original input signal is the signal of signal energy significant changes, the processor 501 is specifically used In:

Origin identification is inserted in the original input signal;

Moment where the origin identification described in the original input signal, the input letter in preset time period is obtained Number it is used as the input sample signal;

Accordingly, the processor 501 is additionally operable to:

Determine origin identification position described in the primary output signal;

Moment where the origin identification described in the primary output signal, obtain defeated in the preset time period Go out signal as the output sampled signal.

So, system detecting device can be by origin identification in the position of original input signal and in original output letter Number aligned in position, more easily get output sampled signal corresponding with input sample signal.

Optionally, when original input signal can be divided into effective information section and invalid information section, the processor 501 has Body is used for:

Origin identification is inserted in the default invalid information section of the original input signal;

Since the moment where the origin identification, the signal in preset time period is obtained in the original input signal Effective information section be used as the input sample signal;

Accordingly, the processor 501 is additionally operable to:

Determine origin identification position described in the primary output signal;

Since the moment where the origin identification, obtained in the primary output signal in the preset time period The effective information section of output signal is used as the output sampled signal.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device can be by origin identification by the position of the invalid information section of original input signal and in primary output signal The aligned in position of invalid information section, more easily gets output sampled signal corresponding with input sample signal, the input is adopted Sample signal and output sampled signal be all effective information section, therefore, reduce the detection workload in system detectio.

Optionally, when original input signal is the signal that signal energy changes highly significant, the processor 501 is specifically used In:

N characteristic point is obtained from the original input signal and distinguishes corresponding feature and position, the n is to be more than or wait In 2 integer, the characteristic point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal Input signal in period is used as the input sample signal;

Accordingly, the processor 501 is additionally operable to:

Judge to whether there is in the primary output signal and there are individual features with the relevant position of the n characteristic point N point;

If the relevant position existed in the primary output signal with the n characteristic point has n point of individual features, Then since the moment where the 1st point of the n point, obtained in the primary output signal in the preset time period Output signal is used as the output sampled signal.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device finds n point for having individual features with the relevant position of the n characteristic point in primary output signal, Therefore so that have in primary output signal with the relevant position of the n characteristic point individual features n point can with it is described The alignment of n characteristic point, more easily gets output sampled signal corresponding with input sample signal, therefore, reduces and is being Detection workload in system detection, meanwhile, this method does not change original input signal and primary output signal, reduces to original The interference of beginning input signal and primary output signal.

Optionally, when original input signal can be divided into effective information section and invalid information section, the processor 501 has Body is used for:

N characteristic point, which is obtained, from the effective information section of the original input signal distinguishes corresponding feature and position, institute It is the integer more than or equal to 2 to state n, and the characteristic point is the point with notable feature in the original input signal;

Since the moment where the 1st characteristic point of the n characteristic point, obtain default in the original input signal The effective information section of input signal in period is used as the input sample signal;

Accordingly, the processor 501 is additionally operable to:

The relevant position that whether there is in the effective information section for judging the primary output signal with the n characteristic point has There is n point of individual features;

If there is the relevant position to the n characteristic point with corresponding in the effective information section of the primary output signal N point of feature, then since the moment where the 1st point of the n point, obtain described pre- in the primary output signal If the effective information section of the output signal in the period is used as the output sampled signal.

So, because original input signal and primary output signal are all divided into effective information section and invalid information section, System detecting device finds n point for having individual features with the relevant position of the n characteristic point in primary output signal, Therefore so that have in primary output signal with the relevant position of the n characteristic point individual features n point can with it is described The alignment of n characteristic point, more easily gets output sampled signal corresponding with input sample signal, the input sample signal and Output sampled signal is all effective information section, therefore, reduces the detection workload in system detectio, meanwhile, this method does not have There are change original input signal and primary output signal, reduce system detectio process and original input signal and original output are believed Number interference.

One of ordinary skill in the art will appreciate that:Realizing all or part of step of above method embodiment can pass through Programmed instruction related hardware is completed, and foregoing program can be stored in a computer read/write memory medium, the program Upon execution, the step of including above method embodiment is performed;And foregoing storage medium includes:ROM, RAM, magnetic disc or light Disk etc. is various can be with the medium of store program codes.

The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims (10)

1. a kind of system detecting method, it is characterised in that including:
Original input signal is inputted into coding/decoding system and the original input signal is sampled, input sample letter is obtained Number, the coding/decoding system includes multigroup codec unit, and the codec unit is used to carry out the original input signal Coding and decoding;
The primary output signal after multigroup codec unit encoding and decoding in the coding/decoding system is obtained, and according to described Position of the input sample signal in the original input signal is sampled to the primary output signal, obtains output sampling Signal;
The correlation of the input sample signal and the output sampled signal is calculated, the correlation represents the output sampling The degree of correlation of signal and the input sample signal;
The quality of the coding/decoding system is determined according to the correlation;
It is described that the original input signal is sampled, input sample signal is obtained, including:
Origin identification is inserted in the original input signal;
Moment where the origin identification described in the original input signal, the input signal obtained in preset time period is made For the input sample signal;
Accordingly, the position according to the input sample signal in the original input signal is believed the original output Number sampled, obtain output sampled signal, including:
Determine origin identification position described in the primary output signal;
Moment where the origin identification described in the primary output signal, the output letter in the preset time period is obtained Number it is used as the output sampled signal.
2. system detecting method according to claim 1, it is characterised in that described to be adopted to the original input signal Sample, obtains input sample signal, including:
When the original input signal includes effective message segment and invalid information section, in the default of the original input signal Origin identification is inserted in invalid information section;
Since the moment where the origin identification, having for the signal in preset time period is obtained in the original input signal Effect message segment is used as the input sample signal;
Accordingly, the position according to the input sample signal in the original input signal is believed the original output Number sampled, obtain output sampled signal, including:
Determine origin identification position described in the primary output signal;
Since the moment where the origin identification, the output in the preset time period is obtained in the primary output signal The effective information section of signal is used as the output sampled signal.
3. system detecting method according to claim 1, it is characterised in that described to be adopted to the original input signal Sample, obtains input sample signal, including:
N characteristic point is obtained from the original input signal and distinguishes corresponding feature and position, the n is more than or equal to 2 Integer, the characteristic point is the point in the original input signal with notable feature;
Since the moment where the 1st characteristic point of the n characteristic point, preset time is obtained in the original input signal Input signal in section is used as the input sample signal;
Accordingly, the position according to the input sample signal in the original input signal is believed the original output Number sampled, obtain output sampled signal, including:
Judge to whether there is the n that there are individual features with the relevant position of the n characteristic point in the primary output signal individual Point;
If the relevant position existed in the primary output signal with the n characteristic point has n point of individual features, from At the moment where 1st point of the n point, the output in the preset time period is obtained in the primary output signal Signal is used as the output sampled signal.
4. system detecting method according to claim 1, it is characterised in that described to be adopted to the original input signal Sample, obtains input sample signal, including:
When the original input signal includes effective message segment and invalid information section, from effective letter of the original input signal Cease and the corresponding feature of n characteristic point difference and position are obtained in section, the n is the integer more than or equal to 2, and the characteristic point is There is the point of notable feature in the original input signal;
Since the moment where the 1st characteristic point of the n characteristic point, preset time is obtained in the original input signal The effective information section of input signal in section is used as the input sample signal;
Accordingly, the position according to the input sample signal in the original input signal is believed the original output Number sampled, obtain output sampled signal, including:
The relevant position that whether there is in the effective information section for judging the primary output signal with the n characteristic point has phase Answer n point of feature;
If the relevant position existed in the effective information section of the primary output signal with the n characteristic point has individual features N point, then since the moment where the 1st point of the n point, when obtaining described default in the primary output signal Between the effective information section of output signal in section be used as the output sampled signal.
5. the system detecting method according to any one of Claims 1-4 claim, it is characterised in that described according to institute Stating the correlation of input sample signal and the output sampled signal calculating coding/decoding system includes:
By the input sample signal restoring into Natural Sampling form input sample signal;
The output sampled signal is recovered to the output sampled signal of Natural Sampling form;
According to the input sample signal of the Natural Sampling form and the output sampled signal of the corresponding Natural Sampling form Calculated by relevance formula and obtain the corresponding correlation of each group codec unit, codec unit described in every group is corresponding Correlation P meet the relevance formula be:
Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in the input sample signal { x };The yiIt is described The corresponding signal value of i-th group of codec unit in sampled signal { y } is exported, the n represents to have n groups in the coding/decoding system Codec unit;
Correlation minimum in the corresponding correlation of each group codec unit is obtained as the correlation of the coding/decoding system Property.
6. a kind of system detecting device, it is characterised in that including:
Sampling unit, for original input signal to be inputted into coding/decoding system and the original input signal is sampled, is obtained Input sample signal is taken, the coding/decoding system includes multigroup codec unit, and the codec unit is used for described original Input signal is coded and decoded;
Acquiring unit, for obtaining the letter of the original output after multigroup codec unit encoding and decoding in the coding/decoding system Number, and the primary output signal is adopted according to position of the input sample signal in the original input signal Sample, obtains output sampled signal;
Computing unit, the correlation for calculating the input sample signal and the output sampled signal, the correlation table Show the output sampled signal and the degree of correlation of the input sample signal;
Quality determination unit, the quality for determining the coding/decoding system according to the correlation;
The sampling unit specifically for:
Origin identification is inserted in the original input signal;
Moment where the origin identification described in the original input signal, the input signal obtained in preset time period is made For the input sample signal;
Accordingly, the acquiring unit specifically for:
Determine origin identification position described in the primary output signal;
Moment where the origin identification described in the primary output signal, the output letter in the preset time period is obtained Number it is used as the output sampled signal.
7. system detecting device according to claim 6, it is characterised in that the sampling unit specifically for:
When the original input signal includes effective message segment and invalid information section, in the default of the original input signal Origin identification is inserted in invalid information section;
Since the moment where the origin identification, having for the signal in preset time period is obtained in the original input signal Effect message segment is used as the input sample signal;
Accordingly, the acquiring unit specifically for:
Determine origin identification position described in the primary output signal;
Since the moment where the origin identification, the output in the preset time period is obtained in the primary output signal The effective information section of signal is used as the output sampled signal.
8. system detecting device according to claim 6, it is characterised in that the sampling unit specifically for:
N characteristic point is obtained from the original input signal and distinguishes corresponding feature and position, the n is more than or equal to 2 Integer, the characteristic point is the point in the original input signal with notable feature;
Since the moment where the 1st characteristic point of the n characteristic point, preset time is obtained in the original input signal Input signal in section is used as the input sample signal;
Accordingly, the acquiring unit specifically for:
Judge to whether there is the n that there are individual features with the relevant position of the n characteristic point in the primary output signal individual Point;
If the relevant position existed in the primary output signal with the n characteristic point has n point of individual features, from At the moment where 1st point of the n point, the output in the preset time period is obtained in the primary output signal Signal is used as the output sampled signal.
9. system detecting device according to claim 6, it is characterised in that the sampling unit specifically for:
When the original input signal includes effective message segment and invalid information section, from effective letter of the original input signal Cease and the corresponding feature of n characteristic point difference and position are obtained in section, the n is the integer more than or equal to 2, and the characteristic point is There is the point of notable feature in the original input signal;
Since the moment where the 1st characteristic point of the n characteristic point, preset time is obtained in the original input signal The effective information section of input signal in section is used as the input sample signal;
Accordingly, the acquiring unit specifically for:
The relevant position that whether there is in the effective information section for judging the primary output signal with the n characteristic point has phase Answer n point of feature;
If the relevant position existed in the effective information section of the primary output signal with the n characteristic point has individual features N point, then since the moment where the 1st point of the n point, when obtaining described default in the primary output signal Between the effective information section of output signal in section be used as the output sampled signal.
10. the system detecting device according to any one of claim 6 to 9 claim, it is characterised in that the calculating list Member specifically for:
By the input sample signal restoring into Natural Sampling form input sample signal;
The output sampled signal is recovered to the output sampled signal of Natural Sampling form;
According to the input sample signal of the Natural Sampling form and the output sampled signal of the corresponding Natural Sampling form Calculated by relevance formula and obtain the corresponding correlation of each group codec unit, codec unit described in every group is corresponding Correlation P meet the relevance formula be:
<mrow> <mi>P</mi> <mo>=</mo> <mfrac> <mrow> <mi>n</mi> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>x</mi> <mi>i</mi> </msub> <msub> <mi>y</mi> <mi>i</mi> </msub> <mo>-</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>x</mi> <mi>i</mi> </msub> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>y</mi> <mi>i</mi> </msub> </mrow> <mrow> <msqrt> <mrow> <mi>n</mi> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msubsup> <mi>x</mi> <mi>i</mi> <mn>2</mn> </msubsup> <mo>-</mo> <msup> <mrow> <mo>(</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>x</mi> <mi>i</mi> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> </mrow> </msqrt> <mo>&amp;CenterDot;</mo> <msqrt> <mrow> <mi>n</mi> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msubsup> <mi>y</mi> <mi>i</mi> <mn>2</mn> </msubsup> <mo>-</mo> <msup> <mrow> <mo>(</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>y</mi> <mi>i</mi> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> </mrow> </msqrt> </mrow> </mfrac> <mo>;</mo> </mrow>
Wherein, the xiIt is the corresponding signal value of i-th group of codec unit in the input sample signal { x };The yiIt is described The corresponding signal value of i-th group of codec unit in sampled signal { y } is exported, the n represents to have n groups in the coding/decoding system Codec unit;
Correlation minimum in the corresponding correlation of each group codec unit is obtained as the correlation of the coding/decoding system Property.
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