CN107978324B - Wireless voice quality assessment method and device - Google Patents
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Abstract
The embodiment of the invention discloses a wireless voice quality evaluation method and a device, wherein the method comprises the following steps: acquiring the packet length, the IP type, the first switching times and the second switching times of a voice data packet in a wireless communication network; according to the packet length and the IP type, looking up a table to obtain a corresponding voice grade coefficient; calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient; and calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression. The embodiment of the invention obtains the corresponding voice grade coefficient by comprehensively judging the packet length and the IP type of the voice data packet, obtains the real-time voice quality by counting the switching times of the base station, does not need complicated test process and complex test equipment, and conveniently obtains the single real-time voice quality and the voice quality of the whole area by controlling different voice data packets.
Description
Technical Field
The embodiment of the invention relates to the technical field of computers, in particular to a wireless voice quality evaluation method and device.
Background
With the development of communication technology, the requirement on voice quality is higher and higher, and especially the requirement on wireless voice quality is higher and higher. The traditional voice quality assessment method has the advantages of intuition, relative accuracy, direct correlation with user experience and the like, but the process is quite complicated, time-consuming and labor-consuming, the whole network condition cannot be reflected, and the quality of the tested voice in the testing period can only be assessed. In practical commercial use, users prefer to see global speech quality, especially the reality of wireless speech.
The existing method considers the influence of key performance indexes of a transmission channel on the voice quality, and judges the threshold value of each index to simulate and evaluate the quality of the voice quality of a base station. However, different speech coding mode decisions are not made, quality distinguishing evaluation for speech streams of different coding modes is not performed, and the base station cannot accurately obtain key performance indexes, and particularly, in a wireless handover scene, the base station maintains statistics respectively, and cannot count index changes caused in a handover process.
In the process of implementing the embodiment of the invention, the inventor finds that the existing method has a complicated process and cannot reflect the wireless voice quality condition of the whole network.
Disclosure of Invention
The embodiment of the invention provides a wireless voice quality evaluation method and device, which are provided by the embodiment of the invention, because the existing method has complicated processes and cannot reflect the wireless voice quality condition of the whole network.
In a first aspect, an embodiment of the present invention provides a method for evaluating wireless voice quality, including:
acquiring the packet length of a voice data packet in a wireless communication network, the type of an interconnection protocol (IP for short) between networks, a first switching frequency and a second switching frequency;
according to the packet length and the IP type, looking up a table to obtain a corresponding voice grade coefficient;
calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient;
calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point by the base station in the last period.
Optionally, the table look-up according to the packet length and the IP type to obtain a corresponding voice level coefficient, further comprising:
according to the packet length and the IP type, looking up a table to obtain a corresponding coding type;
and mapping to obtain the voice grade coefficient corresponding to the coding type according to a coding mapping table and the coding type.
Optionally, the calculating an evaluation coefficient according to the first switching times, the second switching times, and the voice level coefficient further includes:
and looking up a table to obtain a first coefficient and a second coefficient according to the first switching times and the second switching times, and calculating to obtain an evaluation coefficient according to the first coefficient, the second coefficient and the voice grade coefficient.
Optionally, the calculating an evaluation coefficient according to the first coefficient, the second coefficient, and the speech level coefficient further includes:
and calculating the evaluation coefficient R according to a formula I:
R＝R0-Rt,m-Rt-1,nformula one
Wherein R is0For said speech level coefficient, Rt,mIs said first coefficient, Rt-1,nFor the second coefficient, t, m, and n are positive integers, t represents the current cycle number, m represents the first switching number, and n represents the second switching number.
Optionally, the preset expression is a formula two:
eMOS 1+0.035 XR +0.000007 XR (R-60) x (100-R) formula two
Wherein eMOS is the voice quality assessment value.
In a second aspect, an embodiment of the present invention further provides a wireless voice quality assessment apparatus, including:
the information acquisition module is used for acquiring the packet length, the IP type, the first switching times and the second switching times of a voice data packet in a wireless communication network;
the grade coefficient query module is used for looking up a table to obtain a corresponding voice grade coefficient according to the packet length and the IP type;
the evaluation coefficient calculation module is used for calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient;
the quality evaluation module is used for calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point by the base station in the last period.
Optionally, the ranking coefficient query module further includes:
the coding type query unit is used for looking up a table to obtain a corresponding coding type according to the packet length and the IP type;
and the level coefficient mapping unit is used for mapping to obtain the voice level coefficient corresponding to the coding type according to a coding mapping table and the coding type.
Optionally, the evaluation coefficient calculation module is further configured to look up a table according to the first switching times and the second switching times to obtain a first coefficient and a second coefficient, and calculate an evaluation coefficient according to the first coefficient, the second coefficient, and the voice level coefficient.
Optionally, the evaluation coefficient calculation module is further configured to calculate the evaluation coefficient R according to formula one:
R＝R0-Rt,m-Rt-1,nformula one
Wherein R is0For said speech level coefficient, Rt,mIs said first coefficient, Rt-1,nFor the second coefficient, t, m, and n are positive integers, t represents the current cycle number, m represents the first switching number, and n represents the second switching number.
Optionally, the preset expression is a formula two:
eMOS 1+0.035 XR +0.000007 XR (R-60) x (100-R) formula two
Wherein eMOS is the voice quality assessment value.
According to the technical scheme, the embodiment of the invention obtains the corresponding voice grade coefficient by comprehensively judging the packet length and the IP type of the voice data packet, obtains the real-time voice quality by counting the switching times of the base station, does not need a complicated test process and complex test equipment, and conveniently obtains the single real-time voice quality and the voice quality of the whole area by controlling different voice data packets.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for evaluating wireless voice quality according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wireless speech quality assessment apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a wireless speech quality assessment apparatus according to an embodiment of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 shows a flow chart of a wireless voice quality assessment method provided in this embodiment, including:
s101, acquiring the packet length, the IP type, the first switching times and the second switching times of a voice data packet in a wireless communication network.
Wherein the IP types include IPV4 and IPV 6.
The first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point by the base station in the last period.
Specifically, the base station counts the packet length, the IP type, the first switching times and the second switching times of the voice data packet in the wireless communication network.
And S102, according to the packet length and the IP type, looking up a table to obtain a corresponding voice grade coefficient.
The voice level coefficient is used to represent parameters of different voice levels corresponding to different packet lengths and different IP types, and may be represented by numerical values.
S103, calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient.
The evaluation coefficient is a parameter used for speech evaluation, and may be represented by a numerical value.
And S104, calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression.
The preset expression is a predefined model which can be used for calculating a voice quality evaluation value according to an evaluation coefficient.
The wireless voice quality evaluation method provided by the embodiment can be calculated by counting related indexes of the base station, and can also report the related indexes to a specific server, the server evaluates the voice quality of the wireless side uniformly, and the voice quality of a single call and the voice quality of the whole area can be conveniently obtained by controlling different voice data packets.
In the embodiment, the corresponding voice grade coefficient is obtained by comprehensively judging the packet length and the IP type of the voice data packet, the real-time voice quality is comprehensively obtained by counting the switching times of the base station, a complex test process and complex test equipment are not needed, and the single real-time voice quality and the voice quality of the whole area are conveniently obtained.
Further, on the basis of the above embodiment of the method, S102 further includes:
s1021, according to the packet length and the IP type, looking up a table to obtain a corresponding coding type;
specifically, the specific packet length and IP type are queried according to table 1 (narrowband AMR coding mapping table) and table 2 (wideband AMR coding mapping table), and the corresponding coding type is obtained.
Table 1 defines that 8 narrowband AMR speech coding modes must be supported in the LTE phase, and table 2 defines 9 wideband AMR speech coding modes. Different encoding modes can correspond to different default speech level coefficients, and different default speech level coefficients affect the calculation of subsequent speech level coefficients.
For example: the IPV6 with the packet length of 75 and the corresponding coding type is a narrow-band AMR coding type of 5.15; IPV4 with packet length of 81 corresponds to a coding type of wideband AMR coding type 15.85.
Table 1 narrowband AMR coding mapping table
| Narrow band AMR coding | 4.75 | 5.15 | 5.9 | 6.7 | 7.4 | 7.95 | 10.2 | 12.2 |
| IPV6 packet length | 74 | 75 | 76 | 78 | 80 | 82 | 87 | 92 |
| IPV4 packet length | 54 | 55 | 56 | 58 | 60 | 62 | 67 | 72 |
Table 2 wideband AMR coding mapping table
And S1022, mapping to obtain the voice level coefficient corresponding to the coding type according to the coding mapping table and the coding type.
Specifically, the AMR coding type in the coding mapping table provided according to look-up table 3. Where AMR-NB represents narrow band AMR and AMR-WB represents width AMR.
For example: the IPV6 with the packet length of 75, the corresponding coding type is a narrow-band AMR coding type of 5.15, and the speech level coefficient obtained by mapping is 69; the IPV4 with packet length of 81 corresponds to a wideband AMR coding type of 15.85, and the mapped speech level coefficient is 86.
Table 3 encoding mapping table
| AMR coding type | R0 |
| AMR-NB 12.2kbps | 84 |
| AMR-NB 10.2kbps | 83.2 |
| AMR-NB 7.95kbps | 78 |
| AMR-NB 7.4kbps | 76 |
| AMR-NB 6.7kbps | 73 |
| AMR-NB 5.9kbps | 71 |
| AMR-NB 5.15kbps | 69 |
| AMR-NB 4.75kbps | 69 |
| AMR-WB 23.85kbps | 90 |
| AMR-WB 23.05kbps | 90 |
| AMR-WB 19.85kbps | 88 |
| AMR-WB 18.25kbps | 87 |
| AMR-WB 15.85kbps | 86 |
| AMR-WB 14.25kbps | 85 |
| AMR-WB 12.65kbps | 84 |
| AMR-WB 8.85kbps | 83.2 |
| AMR-WB 6.6kbps | 71 |
The voice coding type can be obtained under the condition of not analyzing the voice data packet through table look-up, and the voice quality is quantized by combining the number of times of switching in the statistical period, so that the voice quality condition of one call or the whole area can be conveniently obtained.
Further, on the basis of the above embodiment of the method, S103 further includes:
and looking up a table to obtain a first coefficient and a second coefficient according to the first switching times and the second switching times, and calculating to obtain an evaluation coefficient according to the first coefficient, the second coefficient and the voice grade coefficient.
The evaluation coefficient R may be calculated according to formula one:
R＝R0-Rt,m-Rt-1,nformula one
Wherein R is0For said speech level coefficient, Rt,mIs said first coefficient, Rt-1,nFor the second coefficient, t, m, and n are positive integers, t represents the current cycle number, m represents the first switching number, and n represents the second switching number, i.e., the switching number of the previous cycle.
Specifically, according to the switching times mapping table provided in table 4, the first coefficient R can be obtained by searchingtAnd a second coefficient Rt-1Further based on the first coefficient RtA second coefficient Rt-1And a speech level coefficient R0And calculating to obtain an evaluation coefficient R.
For example, if the number of switching times (first switching times) in the current period t is 3 and the number of switching times (second switching times) in the previous period t-1 is 2, look-up table 4 can obtain RtIs 17, Rt-1Is 13.
Table 4 switching times mapping table
| Number of switching | 1 | 2 | 3 | >＝4 |
| Rt | 6 | 11 | 17 | 25 |
| Rt-1 | 4 | 13 | 21 | 32 |
The first coefficient and the second coefficient required for calculating the evaluation coefficient can be quickly obtained through table lookup; the evaluation coefficient obtained by the formula one calculation can be used for accurately calculating the voice quality evaluation value of the wireless network.
Further, on the basis of the above method embodiment, the preset expression is formula two:
eMOS 1+0.035 XR +0.000007 XR (R-60) x (100-R) formula two
Wherein eMOS is the voice quality assessment value.
And the second formula can be used for accurately calculating the voice quality assessment value of the wireless network.
Fig. 2 is a schematic structural diagram of a wireless voice quality assessment apparatus provided in this embodiment, where the apparatus includes: an information obtaining module 201, a grade coefficient inquiring module 202, an evaluation coefficient calculating module 203 and a quality evaluating module 204, wherein:
the information obtaining module 201 is configured to obtain a packet length, an IP type, a first switching frequency, and a second switching frequency of a voice data packet in a wireless communication network;
the level coefficient query module 202 is configured to look up a table according to the packet length and the IP type to obtain a corresponding voice level coefficient;
the evaluation coefficient calculation module 203 is configured to calculate an evaluation coefficient according to the first switching times, the second switching times and the voice level coefficient;
the quality evaluation module 204 is configured to calculate a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point by the base station in the last period.
Specifically, the information obtaining module 201 obtains a packet length, an IP type, a first switching frequency, and a second switching frequency of a voice data packet in a wireless communication network; the level coefficient query module 202 looks up a table according to the packet length and the IP type to obtain a corresponding voice level coefficient; the evaluation coefficient calculation module 203 calculates an evaluation coefficient according to the first switching times, the second switching times and the voice level coefficient; the quality evaluation module 204 calculates to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
in the embodiment, the corresponding voice grade coefficient is obtained by comprehensively judging the packet length and the IP type of the voice data packet, the real-time voice quality is comprehensively obtained by counting the switching times of the base station, a complex test process and complex test equipment are not needed, and the single real-time voice quality and the voice quality of the whole area are conveniently obtained by controlling different voice data packets.
Further, on the basis of the above apparatus embodiment, the rank factor query module 202 further includes:
the coding type query unit is used for looking up a table to obtain a corresponding coding type according to the packet length and the IP type;
and the level coefficient mapping unit is used for mapping to obtain the voice level coefficient corresponding to the coding type according to a coding mapping table and the coding type.
Further, on the basis of the above device embodiment, the evaluation coefficient calculation module 203 is further configured to obtain a first coefficient and a second coefficient by looking up a table according to the first switching times and the second switching times, and calculate an evaluation coefficient according to the first coefficient, the second coefficient, and the voice level coefficient.
Further, on the basis of the above apparatus embodiment, the evaluation coefficient calculation module 203 is further configured to calculate the evaluation coefficient R according to formula one:
R＝R0-Rt,m-Rt-1,nformula one
Wherein R is0For said speech level coefficient, Rt,mIs the firstCoefficient of Rt-1,nFor the second coefficient, t, m, and n are positive integers, t represents the current cycle number, m represents the first switching number, and n represents the second switching number.
Further, on the basis of the above device embodiment, the preset expression is formula two:
eMOS 1+0.035 XR +0.000007 XR (R-60) x (100-R) formula two
Wherein eMOS is the voice quality assessment value.
The wireless speech quality assessment apparatus described in this embodiment can be used to implement the above method embodiments, and the principle and technical effect are similar, which are not described herein again.
Fig. 3 is a block diagram showing the configuration of the wireless voice quality evaluation apparatus of the present embodiment.
Referring to fig. 3, the wireless voice quality assessment apparatus includes: a processor (processor)301, a memory (memory)302, a communication Interface (Communications Interface)303, and a bus 304;
wherein the content of the first and second substances,
the processor 301, the memory 302 and the communication interface 303 complete mutual communication through the bus 304;
the communication interface 303 is used for information transmission between the wireless voice quality evaluation device and a communication device of a wireless voice quality evaluation apparatus;
the processor 301 is configured to call program instructions in the memory 302 to perform the methods provided by the above-mentioned method embodiments, including:
acquiring the packet length, the IP type, the first switching times and the second switching times of a voice data packet in a wireless communication network;
according to the packet length and the IP type, looking up a table to obtain a corresponding voice grade coefficient;
calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient;
calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point by the base station in the last period.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising:
acquiring the packet length, the IP type, the first switching times and the second switching times of a voice data packet in a wireless communication network;
according to the packet length and the IP type, looking up a table to obtain a corresponding voice grade coefficient;
calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient;
calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point by the base station in the last period.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the above method embodiments, for example, including:
acquiring the packet length, the IP type, the first switching times and the second switching times of a voice data packet in a wireless communication network;
according to the packet length and the IP type, looking up a table to obtain a corresponding voice grade coefficient;
calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient;
calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point by the base station in the last period.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
It should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. A method for wireless speech quality assessment, comprising:
acquiring the packet length of a voice data packet in a wireless communication network, the IP type of a protocol interconnected among networks, the first switching times and the second switching times;
according to the packet length and the IP type, looking up a table to obtain a corresponding voice grade coefficient;
calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient;
calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point in the last period by the base station;
and looking up a table according to the packet length and the IP type to obtain a corresponding voice grade coefficient, and further comprising:
according to the packet length and the IP type, looking up a table to obtain a corresponding coding type;
mapping to obtain a voice grade coefficient corresponding to the coding type according to a coding mapping table and the coding type;
the calculating according to the first switching times, the second switching times and the voice level coefficient to obtain an evaluation coefficient, further comprising:
according to the first switching times and the second switching times, table look-up is carried out to obtain a first coefficient and a second coefficient, and according to the first coefficient, the second coefficient and the voice grade coefficient, an evaluation coefficient is obtained through calculation;
the calculating an evaluation coefficient according to the first coefficient, the second coefficient and the voice level coefficient further includes:
and calculating the evaluation coefficient R according to a formula I:
R＝R0-Rt,m-Rt-1,nformula one
Wherein R is0For said speech level coefficient, Rt,mIs said first coefficient, Rt-1,nFor the second coefficient, t, m and n are positive integers, t represents the current cycle number, m represents the first switching frequency, and n represents the second switching frequency;
the preset expression is a formula II:
eMOS 1+0.035 XR +0.000007 XR (R-60) x (100-R) formula two
Wherein eMOS is the voice quality assessment value.
2. A wireless speech quality assessment apparatus, comprising:
the information acquisition module is used for acquiring the packet length, the IP type, the first switching times and the second switching times of a voice data packet in a wireless communication network;
the grade coefficient query module is used for looking up a table to obtain a corresponding voice grade coefficient according to the packet length and the IP type;
the evaluation coefficient calculation module is used for calculating to obtain an evaluation coefficient according to the first switching times, the second switching times and the voice grade coefficient;
the quality evaluation module is used for calculating to obtain a voice quality evaluation value according to the evaluation coefficient and a preset expression;
the first switching times are the times of switching the wireless access point by the base station in the current period; the second switching times are the times of switching the wireless access point in the last period by the base station;
the ranking coefficient query module further comprises:
the coding type query unit is used for looking up a table to obtain a corresponding coding type according to the packet length and the IP type;
the level coefficient mapping unit is used for mapping to obtain a voice level coefficient corresponding to the coding type according to a coding mapping table and the coding type;
the evaluation coefficient calculation module is further used for looking up a table to obtain a first coefficient and a second coefficient according to the first switching times and the second switching times, and calculating to obtain an evaluation coefficient according to the first coefficient, the second coefficient and the voice grade coefficient;
the evaluation coefficient calculation module is further configured to calculate the evaluation coefficient R according to formula one:
R＝R0-Rt,m-Rt-1,nformula one
Wherein R is0For said speech level coefficient, Rt,mIs said first coefficient, Rt-1,nFor the second coefficient, t, m and n are positive integers, t represents the current cycle number, m represents the first switching frequency, and n represents the second switching frequency;
the preset expression is a formula II:
eMOS 1+0.035 XR +0.000007 XR (R-60) x (100-R) formula two
Wherein eMOS is the voice quality assessment value.
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