CN107846691B - MOS (Metal oxide semiconductor) measuring method and device and analyzer - Google Patents
MOS (Metal oxide semiconductor) measuring method and device and analyzer Download PDFInfo
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- CN107846691B CN107846691B CN201610826199.2A CN201610826199A CN107846691B CN 107846691 B CN107846691 B CN 107846691B CN 201610826199 A CN201610826199 A CN 201610826199A CN 107846691 B CN107846691 B CN 107846691B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention discloses a MOS measuring method, a device and an analyzer, wherein the method comprises the following steps: the mean opinion value MOS analyzer sends original test voice; the MOS analyzer receives a distortion test voice which is subjected to at least voice degradation simulation processing on the original test voice; and the MOS analyzer performs MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value. The invention can avoid the error introduced by the mobile phone during the MOS test.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a Mean Opinion Score (MOS) measurement method, device, and analyzer.
Background
Fig. 1 is a schematic diagram of a conventional MOS measurement method provided in the prior art, fig. 2 is a connection block diagram of a conventional MOS measurement provided in the prior art, and as shown in fig. 1 and fig. 2, a general MOS measurement system completes MOS measurement work by using an external MOS analyzer (i.e., an MOS test hardware system in cooperation with MOS test software). The external MOS measuring system collects and processes the voice signals of a calling party and a called party, the standard voice signal (namely PCM voice 1) is converted into an analog voice signal by an MOS analyzer hardware system through D/A, and then the analog voice signal is sent to the mobile phone 1 as the calling party through a microphone (Mic, M)/Earphone (Earp, E), the PCM voice (namely PCM voice 3) is encoded into PCM voice after being sampled by A/D and encoded by PCM in the mobile phone 1, the PCM voice is received by the mobile phone 2 as a called party after being transmitted wirelessly, the PCM voice (namely PCM voice 4) of the mobile phone 2 is converted into an analog voice signal by D/A and then is transmitted to an MOS analyzer by M/E, and then is restored into a PCM voice signal (namely PCM voice 2) by A/D, and the restored PCM voice signal (namely PCM voice 2) and the original PCM standard voice (namely PCM voice 1) are subjected to MOS calculation together.
As can be seen from fig. 1 and 2, this approach substantially completely simulates the process of a call between two people, which is required in practical measurements and can completely examine all factors affecting voice quality including a mobile phone/network. However, the additional hardware system and the resulting MOS difference are difficult to control, for example, the hardware difference between different handsets may cause the difference of MOS value, and the same handset may cause the difference of MOS value at different time periods or in different physical environments. In the actual measurement process, wireless operators and equipment manufacturers pay more attention to the influence of the network on the voice quality, but do not pay more attention to the influence of M/E, A/D and D/A of the mobile phones on the MOS value, so that the influence of M/E, A/D and D/A processes which may introduce errors on the MOS value is expected to be kept constant.
Some existing solutions directly load standard voice signals to a terminal for measurement without passing through a/D, D/a and MIC, and this way, because MOS values at some time are abnormally large or small due to the fact that a/D, D/a and MIC are not passed through, such measurement results are not approved by operators and the like.
Disclosure of Invention
The technical problem solved by the technical scheme provided by the embodiment of the invention is how to overcome MOS calculation difference caused by difference among mobile phones, environment difference and difference caused by mobile phone change (such as Mic abrasion) during MOS measurement of a large number of users.
The MOS measuring method provided by the embodiment of the invention comprises the following steps:
sending an original test voice;
receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
and performing MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value.
Preferably, the voice degradation simulation process includes a terminal voice transmission simulation process, and the transmitting of the original test speech includes:
and sending the original test voice to a first filter with a first transfer coefficient f1, so that the first filter performs terminal voice transmission simulation processing on the original test voice to obtain a first test voice with f1, and sending the first test voice to a wireless network with a second transfer coefficient f2 through a sending terminal.
Preferably, said receiving a distorted test speech having undergone at least a speech degradation simulation process on said original test speech comprises:
receiving, via a receiving terminal, a second test voice having f1 and f2, which is obtained by transmitting the first test voice by the wireless network, and treating the second test voice as a distorted test voice.
The voice degradation simulation processing further comprises terminal voice reception simulation processing, and the receiving of the distorted test speech on which at least the voice degradation simulation processing has been performed on the original test speech comprises:
after receiving, via a receiving terminal, a second test voice having f1 and f2 resulting from transmission of the first test voice by the wireless network, a third test voice having f1, f2, and f3, which has been subjected to terminal voicing simulation processing on the second test voice, is acquired from a second filter having a third transfer coefficient f3, and the third test voice is taken as a distorted test voice.
Preferably, the sending the original test voice comprises:
the original test speech is transmitted to a wireless network having a second transfer coefficient f2 via a transmitting terminal.
Preferably, the voice degradation simulation process includes a terminal voice reception simulation process, and the receiving of the distorted test speech on which at least the voice degradation simulation process has been performed on the original test speech includes:
after receiving, via a receiving terminal, a fourth test voice having f2 resulting from transmission of the original test voice by the wireless network, fifth test voice having f2 and f3, which has been subjected to terminal voicing simulation processing on the fourth test voice, is acquired from a second filter having a third transfer coefficient f3, and is taken as a distorted test voice.
According to an embodiment of the present invention, there is provided a storage medium storing a program for implementing the MOS measurement method described above.
According to an embodiment of the present invention, there is provided an analyzer including:
a voice transmitter for transmitting an original test voice;
a speech receiver for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
and the voice processor is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value.
Preferably, the voice degradation simulation process includes a terminal voice delivery simulation process, and the voice transmitter transmits the original test voice to a first filter with a first transfer coefficient f1, so that the first filter performs the terminal voice delivery simulation process on the original test voice to obtain a first test voice with f1, and transmits the first test voice to a wireless network with a second transfer coefficient f2 via a transmitting terminal.
Preferably, the voice receiver receives a second test voice having f1 and f2, which is obtained by transmitting the first test voice by the wireless network, via a receiving terminal, and treats the second test voice as a distorted test voice.
Preferably, the voice degradation simulation process further includes a terminal voicing simulation process, and after receiving, via a receiving terminal, a second test voice having f1 and f2 resulting from transmission of the first test voice by the wireless network, the voice receiver acquires, from a second filter having a third transfer coefficient f3, a third test voice having f1, f2, and f3, which has been subjected to the terminal voicing simulation process on the second test voice, and treats the third test voice as a distorted test voice.
Preferably, the voice transmitter transmits the original test voice to a wireless network having a second transfer coefficient f2 via a transmitting terminal.
Preferably, the voice degradation simulation process includes a terminal voice reception simulation process, and after receiving a fourth test voice having f2 by transmitting the original test voice by the wireless network via a receiving terminal, the voice receiver acquires, from a second filter having a third transfer coefficient f3, a fifth test voice having f2 and f3, which has been subjected to the terminal voice reception simulation process on the fourth test voice, and takes the fifth test voice as a distorted test voice.
According to an embodiment of the present invention, a MOS measurement apparatus includes:
the sending module is used for sending original test voice;
a receiving module for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
and the measurement module is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value.
Preferably, the voice degradation simulation process includes a terminal voice transmission simulation process, and the sending module sends the original test voice to a first filter with a first transfer coefficient f1, so that the first filter performs the terminal voice transmission simulation process on the original test voice to obtain a first test voice with f1, and sends the first test voice to a wireless network with a second transfer coefficient f2 via a sending terminal, or sends the original test voice to the wireless network with f2 via the sending terminal.
Preferably, the voice degradation simulation process further includes a terminal voiced speech simulation process, and the receiving module receives, as the distorted test speech, the second test speech having f1 and f2 resulting from transmission of the first test speech by the wireless network via the receiving terminal, or acquires, as the distorted test speech, the third test speech having f1, f2, and f3 having undergone the terminal voiced speech simulation process on the second test speech from the second filter having a third transfer coefficient f3, or acquires, as the distorted test speech, the fifth test speech having f2 and f3 having undergone the terminal voiced speech simulation process on the fourth test speech from the second filter having f3 after receiving, via the receiving terminal, the fourth test speech having f2 resulting from transmission of the original test speech by the wireless network.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the embodiment of the invention can avoid MOS calculation difference caused by difference among mobile phones, environment difference and/or difference caused by mobile phone change (such as mic abrasion) and the like, and particularly has more obvious advantage in the large-capacity MOS test scheme for avoiding the error introduced by the mobile phone when a large number of mobile phone users simultaneously carry out MOS test.
Drawings
FIG. 1 is a diagram illustrating a conventional MOS measurement method provided by the prior art;
FIG. 2 is a block diagram of a conventional MOS measurement connection provided by the prior art;
FIG. 3 is a block diagram of a MOS measurement method provided by an embodiment of the invention;
FIG. 4 is a block diagram of a MOS measurement system provided by an embodiment of the invention;
FIG. 5 is a flowchart of the MOS measurement provided by the embodiment of the invention;
FIG. 6 is a theoretical block diagram of a MOS test provided by an embodiment of the invention;
fig. 7 is a block diagram of a MOS test for avoiding an error introduced by a mobile phone according to a first embodiment of the present invention;
FIG. 8 is a block diagram of a MOS test for avoiding errors introduced by a mobile phone according to a second embodiment of the present invention;
FIG. 9 is a block diagram of a MOS test for avoiding errors introduced by a mobile phone according to a third embodiment of the present invention;
fig. 10 is a theoretical block diagram of a positioning handset differential segmentation isolation analysis method according to a fourth embodiment of the present invention;
fig. 11 is a theoretical block diagram of a positioning handset difference segmentation isolation analysis method according to a fifth embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 3 is a block diagram of a MOS measurement method provided in an embodiment of the present invention, and as shown in fig. 3, the steps include:
step S101: during the MOS analyzer transmits the test voice via the transmitting terminal and the wireless network having the second transfer coefficient f2, the receiving terminal receives the test voice having f1 and f2 or having f 2.
Implementation mode 1: carrying out terminal voice transmission simulation processing on the test voice transmitted by the MOS analyzer by a transmitting device with a first transmission coefficient f1 to obtain the test voice with f 1; the transmitting terminal transmits the test voice with f1 via a wireless network with f2, generating a test voice with f1 and f 2.
Wherein f1 is a simulation coefficient for performing a terminal voice transmission simulation process on the test speech before the transmission terminal transmits the test speech via the wireless network, and the simulation coefficient is not affected by D/A, A/D and M/E.
Wherein the transmitting means is a filter.
Implementation mode 2: the MOS analyzer transmits a test voice to the transmitting terminal, which transmits the test voice via a wireless network having f2, generating a test voice having f 2.
Step S102: the receiving terminal directly sends the test voice with f1 and f2 or f2 to the MOS analyzer, or sends the test voice with f1 and f2 or f2 received by the receiving terminal to the MOS analyzer after performing terminal voice call simulation processing, so that the MOS analyzer performs MOS test processing to obtain an MOS value.
Implementation mode 1: the receiving terminal sends the test voice with f1 and f2 to the MOS analyzer, and the MOS analyzer performs MOS test processing by using the test voice sent by the MOS analyzer and the test voice with f1 and f2 received by the MOS analyzer.
Implementation mode 2: the receiving terminal sends the test voice with f1 and f2 to a receiving device with a third transfer coefficient f3, the receiving device with the third transfer coefficient f3 performs terminal voice call simulation processing on the test voice with f1 and f2 to obtain the test voice with f1, f2 and f3, and sends the test voice to the MOS analyzer, and the MOS analyzer performs MOS test processing by using the test voice sent by the MOS analyzer and the received test voice with f1, f2 and f 3.
Implementation mode 3: the receiving terminal sends the test voice with f2 to a receiving device with a third transfer coefficient f3, the receiving device with the third transfer coefficient f3 carries out terminal voice receiving simulation processing on the test voice with f2 to obtain test voice with f2 and f3, and the test voice is sent to the MOS analyzer, and the MOS analyzer carries out MOS test processing by using the test voice sent by the MOS analyzer and the test voice with f2 and f3 received by the MOS analyzer.
Wherein f3 is a simulation coefficient not affected by D/A, A/D and M/E, and the receiving device is a filter.
That is, while the MOS analyzer transmits the test speech through the transmitting terminal, the wireless network having the second transfer coefficient f2, and the receiving terminal, it is necessary to perform terminal voice transmission simulation processing (the coefficient used in the processing is f1) on the test speech transmitted by the MOS analyzer and/or perform terminal voice reception simulation processing (the coefficient used in the processing is f3) on the test speech received by the receiving terminal, so that the MOS analyzer performs the MOS test processing.
The invention can overcome the MOS calculation difference caused by the difference between mobile phones, the difference of environment and/or the difference caused by the change (such as mic abrasion) of the mobile phones during the MOS test of a large number of users.
It will be understood by those skilled in the art that all or part of the steps in fig. 3 may be implemented by instructing the relevant hardware through a program, and the program may be stored in a readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc. The program, when executed, comprises: receiving a test voice with f1 and f2 or with f 2; and directly sending the test voice with f1 and f2 or f2 to the MOS analyzer, or sending the test voice with f1 and f2 or f2 received by the receiving terminal to the MOS analyzer after carrying out terminal voice receiving simulation processing. As an embodiment, during the time when the MOS analyzer transmits the test voice via the transmission apparatus having f1, the transmission terminal, and the wireless network having f2, by executing the program, the MOS analyzer receives the test voice having f1 and f2 and directly transmits the received test voice having f1 and f2 to the MOS analyzer. As another embodiment, a difference from the previous embodiment is that by executing the program, the terminal voice reception simulation process is performed on the received test voice having f1 and f2, and the resultant test voice having f1, f2, and f3 is sent to the MOS analyzer. As a third embodiment, while the MOS analyzer transmits the test voice via the wireless network of the transmission terminal and f2, by executing the program, the test voice having f2 is received, the terminal talk simulation process is performed on the received test voice having f2, and the resulting test voice having f2 and f3 is transmitted to the MOS analyzer. The program for MOS measurement may be stored in the receiving terminal or the MOS analyzer.
Fig. 4 is a block diagram of a MOS measurement system according to an embodiment of the present invention, as shown in fig. 4, including: a transmitting terminal, a receiving terminal, a wireless network with a second transfer coefficient f2, a MOS analyzer, and a transmitting device with a first transfer coefficient f1 and/or a receiving device with a third transfer coefficient f 3.
And the MOS analyzer is used for transmitting the test voice through the transmitting terminal and the wireless network.
The receiving terminal is used for receiving the test voice with the first transmission coefficients f1 and f2, and directly sending the test voice with f1 and f2 or f2 to the MOS analyzer, or after carrying out terminal voice call simulation processing on the test voice with f1 and f2 or f2 by using a receiving device, sending the test voice to the MOS analyzer for carrying out MOS test processing by the MOS analyzer to obtain an MOS value, wherein f1 is a coefficient used for carrying out terminal voice call simulation processing on the test voice before the sending terminal sends the test voice through a wireless network.
And the transmitting device is used for carrying out terminal voice transmission simulation processing on the test voice transmitted by the MOS analyzer to obtain the test voice with f1, transmitting the test voice with f1 to the transmitting terminal, and transmitting the test voice with f1 and f2 by the transmitting terminal through the wireless network with f2 to generate the test voice with f1 and f 2.
And the receiving device is used for carrying out terminal voice receiving simulation processing on the test voice with f1 and f2 to obtain the test voice with f1, f2 and f3, or carrying out terminal voice receiving simulation processing on the test voice with f2 to obtain the test voice with f2 and f 3.
As a first embodiment, the MOS test system includes a MOS analyzer, a transmitting apparatus having f1, a transmitting terminal, a wireless network having f2, a receiving terminal. The MOS analyzer sends a test voice; the transmitting device with f1 performs terminal voice transmission simulation processing on the test voice transmitted by the MOS analyzer to obtain a test voice with f1, and transmits the test voice to the transmitting terminal; the transmitting terminal transmitting the test voice having f1 via a wireless network having f2, generating test voices having f1 and f 2; the receiving terminal receives the test voice with f1 and f2 and sends the test voice to the MOS analyzer; the MOS analyzer performs MOS test processing using the test voice and the test voice having f1 and f2, to obtain MOS values.
As a second embodiment, the MOS test system includes a MOS analyzer, a transmission terminal, a wireless network having f2, a reception terminal, and a reception apparatus having f 3. The MOS analyzer sends a test voice; the transmitting terminal transmits the test voice via a wireless network having f2, generating a test voice having f 2; the receiving terminal receives the test voice with f2 and sends the test voice with f3 to the receiving terminal; a receiving terminal with f3 performs terminal voice receiving simulation processing on the test voice with f2 sent by the receiving terminal to obtain test voice with f2 and f3, and sends the test voice to a MOS analyzer; the MOS analyzer performs MOS test processing using the test voice and the test voice having f2 and f3, to obtain MOS values.
As a third embodiment, a MOS test system includes a MOS analyzer, a transmitting device having f1, a transmitting terminal, a wireless network having f2, a receiving terminal, and a receiving device having f 3. The MOS analyzer sends a test voice; the transmitting device with f1 performs terminal voice transmission simulation processing on the test voice transmitted by the MOS analyzer to obtain a test voice with f1, and transmits the test voice to the transmitting terminal; the transmitting terminal transmits the test voice with f1 via a wireless network with f2, generating a test voice with f1 and f 2; the receiving terminal receives the test voice with f1 and f2 and sends the test voice to the receiving terminal with f 3; the receiving device with f3 performs terminal voice reception simulation processing on the test voice with f1 and f2 sent by the receiving terminal to obtain the test voice with f1, f2 and f3, and sends the test voice to the MOS analyzer; the MOS analyzer performs MOS test processing using the test voice and the test voice having f1, f2, and f3, and obtains a MOS value.
The transmitting device is a first filter having f1, and may be independent of a transmitting terminal (e.g., a mobile phone) or may be provided in the transmitting terminal.
The receiving device is a second filter having f3, and may be independent of the receiving terminal (e.g., a mobile phone) or may be incorporated in the receiving terminal.
The embodiment is a high-capacity MOS test system capable of avoiding errors introduced by a mobile phone.
Fig. 5 is a flowchart of the MOS measurement according to the embodiment of the present invention, and as shown in fig. 5, the steps include:
step S201: the original test speech is sent.
Step S201 includes: and sending the original test voice to a first filter with f1, so that the first filter performs terminal voice call simulation processing on the original test voice to obtain a first test voice with f1, and sending the first test voice to a wireless network with f2 through a sending terminal.
Alternatively, step S201 includes: the original test voice is transmitted to a wireless network having f2 via a transmitting terminal.
Step S202: a distorted test speech is received that has been subjected to at least a voice degradation simulation process on the original test speech.
Step S202 includes: receiving, via a receiving terminal, a second test voice having f1 and f2, which is obtained by transmitting the first test voice by the wireless network, and treating the second test voice as a distorted test voice.
Alternatively, step S202 includes: after receiving, via a receiving terminal, a second test voice having f1 and f2 resulting from transmission of the first test voice by the wireless network, a third test voice having f1, f2, and f3, which has been subjected to terminal voicing simulation processing on the second test voice, is acquired from a second filter having a third transfer coefficient f3, and the third test voice is taken as a distorted test voice.
Alternatively, step S202 includes: after receiving, via a receiving terminal, a fourth test voice having f2 resulting from transmission of the original test voice by the wireless network, fifth test voice having f2 and f3, which has been subjected to terminal voicing simulation processing on the fourth test voice, is acquired from a second filter having a third transfer coefficient f3, and is taken as a distorted test voice.
Step S203: and performing MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value.
The MOS measuring step comprises: after original test voice before transmission through a communication system and distortion test voice after transmission through the communication system are obtained, the feature parameters of the original test voice are obtained by sequentially carrying out preprocessing and feature extraction on the original test voice, and the feature parameters of the distortion test voice are obtained by sequentially carrying out preprocessing and feature extraction on the distortion test voice; and calculating objective distortion quantity by using the characteristic parameters of the original test voice and the characteristic parameters of the distortion test voice, and mapping the obtained objective distortion quantity into scale representation of subjective evaluation, namely an MOS value.
It will be understood by those skilled in the art that all or part of the steps for implementing the embodiment shown in fig. 5 may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc. The program, when executed, includes: sending an original test voice; receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech; and performing MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value. Wherein, the program for transmitting the original test voice can be stored in the transmitting terminal or the analyzer; the program for receiving the distorted test speech in which at least the voice degradation simulation process has been performed on the original test speech may be stored in a receiving terminal or an analyzer, or may be stored in another independent apparatus in which the program is executable; the program for MOS measurement may be stored in the receiving terminal or the analyzer, or may be stored in another independent apparatus that can run the program.
The embodiment of the invention also provides an MOS measurement apparatus, which includes a sending module for implementing step S201, a receiving module for implementing step S202, and a processing module for implementing step S203. The MOS measurement apparatus may be implemented by software and run on hardware devices, for example, it may run on a terminal (e.g., a mobile phone) or other independent hardware devices. The voice degradation simulation process comprises a terminal voice transmission simulation process and/or a terminal voice receiving simulation process. In one embodiment, after the sending module sends the original test speech to a first filter with f1, and the first filter performs terminal voice call simulation processing on the original test speech to obtain a first test speech with f1, and sends the first test speech to a wireless network with f2 via a sending terminal, the receiving module receives a second test speech with f1 and f2, which is obtained by the wireless network by transmitting the first test speech, as a distorted test speech via a receiving terminal, and sends the distorted test speech to a processing module. As another embodiment, the receiving module acquires, as the distorted test speech, the third test speech having f1, f2, and f3, which has been subjected to the terminal voicing simulation process on the second test speech, from the second filter having f 3. As a third implementation manner, after the sending module sends the original test speech to the wireless network with f2 via the sending terminal, the receiving terminal receives a fourth test speech with f2 resulting from the transmission of the original test speech by the wireless network, and the receiving module obtains, as a distorted test speech, a fifth test speech with f2 and f3 that has been subjected to a terminal voice reception simulation process on the fourth test speech from the second filter with f 3.
An embodiment of the present invention further provides an analyzer, which includes: a voice transmitter for transmitting an original test voice; a speech receiver for receiving a distorted test speech having undergone at least a speech degradation simulation process on the original test speech; and the voice processor is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value. The analyzer is implemented in hardware and may be integrated with a terminal, such as a cell phone, or form a stand-alone analysis device. Embodiments of the analyzer include:
1. and the voice transmitter transmits the original test voice to a first filter with f1, so that the first filter performs terminal voice call simulation processing on the original test voice to obtain a first test voice with f1, and the first test voice is transmitted to a wireless network with f2 through a transmitting terminal. The voice receiver receives a second test voice having f1 and f2, which is obtained by transmitting the first test voice by the wireless network, via a receiving terminal, and treats the second test voice as a distorted test voice. The speech processor performs MOS measurements based on the original test speech and the distorted test speech with f1 and f2 to obtain MOS values.
2. And the voice transmitter transmits the original test voice to a first filter with f1, so that the first filter performs terminal voice call simulation processing on the original test voice to obtain a first test voice with f1, and the first test voice is transmitted to a wireless network with f2 through a transmitting terminal. After receiving a second test voice having f1 and f2 resulting from transmission of the first test voice by the wireless network via a receiving terminal, the voice receiver acquires, from a second filter having f3, a third test voice having f1, f2, and f3, which has been subjected to terminal voicing simulation processing on the second test voice, and treats the third test voice as a distorted test voice. The speech processor performs MOS measurements based on the original test speech and the distorted test speech with f1, f2, and f3 to obtain MOS values.
3. The voice transmitter transmits the original test voice to a wireless network having a second transfer coefficient f2 via a transmitting terminal. After receiving, via a receiving terminal, a fourth test voice having f2 resulting from transmission of the original test voice by the wireless network, the voice receiver acquires, from a second filter having f3, a fifth test voice having f2 and f3, which has been subjected to terminal voicing simulation processing for the fourth test voice, and treats the fifth test voice as a distorted test voice. The speech processor performs MOS measurements based on the original test speech and the distorted test speech with f2 and f3 to obtain MOS values.
The f1 is a simulation coefficient not affected by D/A, A/D and M/E, and the f3 is a simulation coefficient not affected by D/A, A/D and M/E. This is further described below in conjunction with the embodiments shown in fig. 6-9.
Fig. 6 is a theoretical block diagram of MOS test provided by the embodiment of the present invention, and as shown in fig. 6, the wireless network may cause signal degradation, so that the embodiment of the present invention uses the wireless network as f2 (i.e., the wireless network has a second transfer coefficient f 2). The standard voice signal (i.e. PCM voice 1) to be played is converted into an analog voice signal by a hardware system of the MOS analyzer through D/a, and then is sent to the a/D of the calling handset 1 through M/E, and the analog voice signal is converted into PCM voice (i.e. PCM voice 2) by the a/D of the calling handset 1, and errors may be introduced by D/A, A/D and M/E in the process, so this process is represented by f1 in the embodiment of the present invention (i.e. the D/A, A/D and M/E processes on the sending side have a first transfer coefficient f 1). The called mobile phone 2 receives PCM voice (i.e. PCM voice 3) through the wireless network, converts the PCM voice into an analog voice signal through D/A, then transmits the analog voice signal to A/D of the MOS analyzer through M/E, and restores the analog voice signal into a PCM voice signal (i.e. PCM voice 4) through A/D, and D/A, A/D and M/E in the process are possible to introduce errors, so the embodiment of the invention uses f3 to represent the process (i.e. the D/A, A/D and M/E processes of the receiving side have a third transfer coefficient f 3). If the input signal is a, the signal returned to the MOS analyzer after passing through the MOS analyzer, the calling handset 1, the wireless network, and the called handset 2 is B, then B is a f1 f3 f 2. Since wireless carriers and vendors are more concerned about the effect of f3 on B in MOS testing than the effects of f1 and f2 on B, it is desirable that f1 and f2 remain constant during all MOS tests.
Fig. 7 is a block diagram of a MOS test for avoiding errors introduced by a mobile phone according to a first embodiment of the present invention, as shown in fig. 7, and the difference from the general MOS test is that the a/D and D/a and M/E cables in fig. 6 are not (or are removed), but f1 and f3 in fig. 6 are completely replaced by filters, so that f1 and f3 are always constant, and the embodiment of the present invention may focus on studying f2, that is, the influence of the network on the MOS value, so as to avoid the MOS calculation difference caused by the difference between mobile phones, the environmental difference, and/or the difference caused by the change of the mobile phones (e.g., microphone wear). Particularly, when a large number of mobile phone users simultaneously perform MOS tests, the high-capacity MOS measurement method and the high-capacity MOS measurement system for avoiding the errors introduced by the mobile phone are very advantageous.
Further, the standard voice signal is directly loaded to the terminal for testing without passing through a/D, D/a and MIC, and the MOS value at some time is abnormally large or small due to the fact that the standard voice signal does not pass through a/D, D/a and MIC, and therefore the test result is not approved by an operator and the like. Embodiments of the present invention use f1 and f3 filters to simulate the A/D, D/A and MIC processes to solve this problem.
The standard voice PCM voice 1 (namely, PCM test voice) to be played is sent to the mobile phone 1 after being filtered by f1 through a MOS analyzer or a standard voice signal (namely, PCM test voice) to be played is directly filtered by f1 in the mobile phone 1 to obtain PCM voice 2 (namely, PCM test voice with f1), the PCM voice 2 (namely, PCM test voice with f1) is received by the mobile phone 2 after being wirelessly transmitted, the PCM voice 3 (namely, PCM test voice with f1 and f2) received by the mobile phone 2 is filtered by f3 to output PCM voice 4 (namely, PCM test voice with f1, f2 and f3), and the PCM voice 4 (namely, PCM test voice with f1, f2 and f3) and the original PCM standard voice PCM voice 1 (namely, PCM test voice) are subjected to MOS calculation through the MOS analyzer.
The MOS analyzer can be a combination of hardware and software, and can be integrated with or separated from a mobile phone.
Fig. 8 is a block diagram of a MOS test for avoiding errors introduced by a mobile phone according to a second embodiment of the present invention, and as shown in fig. 8, this embodiment is different from the first embodiment shown in fig. 7 in that a standard voice PCM signal 1 (i.e., PCM test voice) to be played is directly transmitted by a wireless network without any processing such as filtering, and other processes are consistent with those of embodiment 1. Specifically, a standard voice PCM voice 1 (i.e., PCM test voice) to be played is sent to the mobile phone 1 by the MOS analyzer, the standard voice PCM voice 1 (i.e., PCM test voice) is sent to the wireless network by the mobile phone 1, the standard voice PCM voice 1 (i.e., PCM test voice) is received by the mobile phone 2 after being transmitted through the wireless network, the PCM voice 3 (i.e., PCM test voice with f2) received by the mobile phone 2 is filtered by f3 and outputs PCM voice 4 (i.e., PCM test voice with f2 and f3), and the MOS analyzer performs MOS calculation on the PCM voice 4 (i.e., PCM test voice with f2 and f3) together with the original PCM standard voice PCM voice 1 (i.e., PCM test voice).
The MOS analyzer can be a combination of hardware and software, and can be integrated with or separated from a mobile phone.
Fig. 9 is a block diagram of a MOS test for avoiding errors introduced by a mobile phone according to a third embodiment of the present invention, and as shown in fig. 9, the difference between this embodiment and the first embodiment shown in fig. 7 is that a called mobile phone (i.e., a mobile phone 2) receives PCM speech 3 degraded by wireless network transmission, and then directly sends the PCM speech to a MOS analyzer without any processing such as filtering, and other processes are consistent with those of the first embodiment 1. Specifically, a standard voice PCM voice 1 (i.e., PCM test voice) to be played is sent to the mobile phone 1 after being filtered by f1 by the MOS analyzer or a standard voice signal to be played (i.e., PCM test voice) is directly subjected to f1 filtering in the mobile phone 1 to obtain PCM voice 2 (i.e., PCM test voice with f1), the mobile phone 1 sends the PCM voice 2 (i.e., PCM test voice with f1) to the wireless network, the PCM voice 2 (i.e., PCM test voice with f1) is received by the mobile phone 2 after being transmitted by the wireless network, the mobile phone 2 directly sends the received PCM voice 3 (i.e., PCM test voice with f1 and f2) to the MOS analyzer, and the MOS analyzer performs MOS calculation on the PCM voice 3 (i.e., PCM test voice with f1 and f2) and the original PCM standard voice PCM voice 1 (i.e., PCM test voice).
When the difference between the mobile phones, the environmental difference and/or the difference caused by the change of the mobile phones (such as mic wear) needs to be analyzed and confirmed, for example, the a/D, D/a and the M/E of the calling terminal or the called terminal are respectively replaced by f1 or f2 filters, the obtained MOS values are compared with the calculated MOS values (taking the MOS values as standard reference signals) of the a/D, D/a and M/E of the calling terminal and the called terminal of fig. 7, which are all replaced by f1 and f2 filters, and if the difference of the MOS values is large, the called terminal or the calling terminal has a difference. This is further illustrated in connection with the embodiments of fig. 10 and 11.
Fig. 10 is a theoretical block diagram of a positioning handset differential segmentation isolation analysis method according to a fourth embodiment of the present invention, and as shown in fig. 10, an f1 filter is used to replace a/D, D/a and M/E of a calling terminal to obtain an MOS value, and the MOS value is compared with a standard MOS value obtained in the first embodiment shown in fig. 7, and if the difference between the two values is large, it indicates that there is a difference between the called terminal and the calling terminal.
Fig. 11 is a theoretical block diagram of a positioning handset differential segmentation isolation analysis method according to a fifth embodiment of the present invention, and as shown in fig. 11, an f2 filter is used to replace a/D, D/a and M/E of a called end to obtain an MOS value, and the MOS value is compared with a standard MOS value obtained in the first embodiment shown in fig. 7, and if the difference between the two values is large, it indicates that there is a difference between the calling end and the called end.
Through the embodiments shown in fig. 10 and fig. 11, the embodiment of the present invention can quickly and accurately locate the position caused by the difference when the MOS calculation difference is caused by the difference between the mobile phones, the environmental difference, and/or the difference caused by the change (e.g., mic wear) of the mobile phones.
The embodiment of the invention can quickly, accurately and conveniently analyze and position the reasons caused by the difference between mobile phones, the difference of environment and the MOS calculation difference caused by the change (such as mic abrasion) of the mobile phones.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.
Claims (9)
1. A mean opinion value MOS measurement method comprises the following steps:
sending an original test voice;
receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
performing MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
wherein, the voice degradation simulation process comprises a terminal voice transmission simulation process, and the sending of the original test voice comprises:
sending the original test voice to a first filter with a first transfer coefficient f1, so that the first filter can perform terminal voice transmission simulation processing on the original test voice to obtain a first test voice with f1, and sending the first test voice to a wireless network with a second transfer coefficient f2 through a sending terminal;
wherein said receiving a distorted test speech having undergone at least a speech degradation simulation process on said original test speech comprises:
receiving a second test voice having f1 and f2, which is obtained by transmitting the first test voice by the wireless network, via a receiving terminal and treating the second test voice as a distorted test voice;
wherein f1 is a coefficient for performing terminal voice call simulation processing on the test speech before the transmitting terminal transmits the test speech via the wireless network, and f1 is not affected by D/A, A/D and M/E.
2. A mean opinion value MOS measurement method comprises the following steps:
sending an original test voice;
receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
performing MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
wherein, the voice degradation simulation process comprises a terminal voice transmission simulation process, and the sending of the original test voice comprises:
sending the original test voice to a first filter with a first transfer coefficient f1, so that the first filter can perform terminal voice transmission simulation processing on the original test voice to obtain a first test voice with f1, and sending the first test voice to a wireless network with a second transfer coefficient f2 through a sending terminal;
wherein the voice degradation simulation processing further includes terminal voice reception simulation processing, and the receiving of the distortion test speech in which the voice degradation simulation processing has been performed on at least the original test speech includes:
after receiving, via a receiving terminal, a second test voice having f1 and f2 resulting from transmission of the first test voice by the wireless network, acquiring, from a second filter having a third transfer coefficient f3, a third test voice having f1, f2, and f3, which has been subjected to terminal voicing simulation processing on the second test voice, and treating the third test voice as a distorted test voice;
wherein f1 is a coefficient used for performing terminal voice transmission simulation processing on the test voice before the sending terminal sends the test voice through the wireless network, f1 is not influenced by D/A, A/D and M/E, and f3 is a simulation coefficient not influenced by D/A, A/D and M/E.
3. A mean opinion value MOS measurement method comprises the following steps:
sending an original test voice;
receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
performing MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
wherein, the sending the original test voice comprises:
transmitting the original test voice to a wireless network having f2 via a transmitting terminal;
wherein the voice degradation simulation processing includes terminal voice reception simulation processing, and the receiving of the distortion test speech in which the voice degradation simulation processing has been performed on at least the original test speech includes:
after receiving, via a receiving terminal, a fourth test voice having f2 resulting from transmission of the original test voice by the wireless network, acquiring, from a second filter having f3, a fifth test voice having f2 and f3, which has been subjected to terminal voicing simulation processing on the fourth test voice, and taking the fifth test voice as a distorted test voice;
where f3 is a simulation coefficient not affected by D/A, A/D and M/E.
4. An analyzer, comprising:
a voice transmitter for transmitting an original test voice;
a speech receiver for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
the voice processor is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
wherein the voice degradation simulation process comprises a terminal voice transmission simulation process, and the voice transmitter transmits the original test voice to a first filter with a first transfer coefficient f1, so that the first filter performs the terminal voice transmission simulation process on the original test voice to obtain a first test voice with f1, and transmits the first test voice to a wireless network with a second transfer coefficient f2 through a transmitting terminal;
wherein the voice receiver receives a second test voice having f1 and f2, which is obtained by transmitting the first test voice by the wireless network, via a receiving terminal and treats the second test voice as a distorted test voice;
wherein f1 is a coefficient for performing terminal voice call simulation processing on the test speech before the transmitting terminal transmits the test speech via the wireless network, and f1 is not affected by D/A, A/D and M/E.
5. An analyzer, comprising:
a voice transmitter for transmitting an original test voice;
a speech receiver for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
the voice processor is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
wherein the voice degradation simulation process comprises a terminal voice transmission simulation process, and the voice transmitter transmits the original test voice to a first filter with a first transfer coefficient f1, so that the first filter performs the terminal voice transmission simulation process on the original test voice to obtain a first test voice with f1, and transmits the first test voice to a wireless network with a second transfer coefficient f2 through a transmitting terminal;
wherein the voice degradation simulation process further includes a terminal voice reception simulation process, and after receiving, via a receiving terminal, a second test voice having f1 and f2 resulting from transmission of the first test voice by the wireless network, the voice receiver acquires, from a second filter having a third transfer coefficient f3, a third test voice having f1, f2, and f3, which has been subjected to the terminal voice reception simulation process on the second test voice, and treats the third test voice as a distorted test voice;
wherein f1 is a coefficient used for performing terminal voice transmission simulation processing on the test voice before the sending terminal sends the test voice through the wireless network, f1 is not influenced by D/A, A/D and M/E, and f3 is a simulation coefficient not influenced by D/A, A/D and M/E.
6. An analyzer, comprising:
a voice transmitter for transmitting an original test voice;
a speech receiver for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
the voice processor is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
wherein the voice transmitter transmits the original test voice to a wireless network having a second transfer coefficient f2 via a transmitting terminal;
wherein the voice degradation simulation process includes a terminal voice reception simulation process, and after receiving a fourth test voice having f2 from the original test voice transmitted by the wireless network via a receiving terminal, the voice receiver acquires, from a second filter having a third transfer coefficient f3, a fifth test voice having f2 and f3, which has been subjected to the terminal voice reception simulation process on the fourth test voice, and takes the fifth test voice as a distorted test voice;
where f3 is a simulation coefficient not affected by D/A, A/D and M/E.
7. A MOS measurement device comprising:
the sending module is used for sending original test voice;
a receiving module for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
the measurement module is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
the sending module sends the original test voice to a first filter with a first transfer coefficient f1, so that the first filter performs terminal voice transmission simulation processing on the original test voice to obtain a first test voice with f1, and the first test voice is sent to a wireless network with a second transfer coefficient f2 through a sending terminal;
wherein the voice degradation simulation process further includes a terminal voice reception simulation process, and the receiving module receives, as a distortion test voice, a second test voice having f1 and f2, which is obtained by transmitting the first test voice by the wireless network, via a receiving terminal;
wherein f1 is a coefficient for performing terminal voice call simulation processing on the test speech before the transmitting terminal transmits the test speech via the wireless network, and f1 is not affected by D/A, A/D and M/E.
8. A MOS measurement device comprising:
the sending module is used for sending original test voice;
a receiving module for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
the measurement module is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
the sending module sends the original test voice to a first filter with a first transfer coefficient f1, so that the first filter performs terminal voice transmission simulation processing on the original test voice to obtain a first test voice with f1, and the first test voice is sent to a wireless network with a second transfer coefficient f2 through a sending terminal;
wherein the voice degradation simulation process further includes acquiring, as the distortion test speech, third test speech having f1, f2, and f3, for which the terminal voice reception simulation process has been performed on the second test speech, from a second filter having a third transfer coefficient f 3;
wherein f1 is a coefficient used for performing terminal voice transmission simulation processing on the test voice before the sending terminal sends the test voice through the wireless network, f1 is not influenced by D/A, A/D and M/E, and f3 is a simulation coefficient not influenced by D/A, A/D and M/E.
9. A MOS measurement device comprising:
the sending module is used for sending original test voice;
a receiving module for receiving a distorted test speech for which at least a voice degradation simulation process has been performed on the original test speech;
the measurement module is used for carrying out MOS measurement according to the original test voice and the distortion test voice to obtain an MOS value;
wherein the voice degradation simulation process includes transmitting the original test speech to a wireless network having f2 via a transmitting terminal;
wherein the voice degradation simulation process further includes acquiring, as a distorted test speech, a fifth test speech having f2 and f3, which has been subjected to the terminal voice call simulation process on the fourth test speech, from a second filter having f3, after receiving the fourth test speech having f2, which is obtained by transmitting the original test speech by the wireless network, via a receiving terminal; where f3 is a simulation coefficient not affected by D/A, A/D and M/E.
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