WO2009012693A1

WO2009012693A1 - A method and system for adjusting the port parameter of voice office side

Info

Publication number: WO2009012693A1
Application number: PCT/CN2008/071651
Authority: WO
Inventors: Dongsheng Lan; Yan Zhang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-07-20
Filing date: 2008-07-16
Publication date: 2009-01-29
Also published as: CN101132452A

Abstract

A method and system for adjusting the port parameter of voice office side are disclosed and belong to the communication technical field. The method comprises steps: receiving voice signal sending from voice terminal; comparing the received voice signal with the preset standard voice signal, and judging whether the quality of the received voice signal reaches the predetermined voice quality; if the quality of the received voice signal does not reach the predetermined voice quality, the port parameter of the voice office side will be adjusted. The port parameter of the voice office side is set according to the final actual voice quality feeling of the voice terminal user, therefore the best voice quality can be provided to each voice terminal user.

Description

Method and system for adjusting voice port port parameters

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and system for adjusting voice port parameters. Background technique

The VoIP (Voice over Internet Protocol) system compresses the analog voice signals according to the voice compression algorithm, and encapsulates the voice signals according to the TCP (Transmission Control Protocol) / IP (Internet Protocol) standard, in the form of data packets. A system that delivers these data packets over the IP network to the recipient for the purpose of transmitting voice over the Internet. Also known as Internet telephony, VoIP or IP telephony. When transmitting voice signals with high real-time requirements through the IP network, the port parameters of the voice office, such as port gain and port impedance, are critical to the quality of the voice. The prior art determines the port gain of the appropriate voice office end by detecting the loop impedance according to the corresponding relationship between the preset loop impedance and the gain of the sender and the receiver voice office port, that is, according to the detected loop impedance setting. The port gain allows the port gain to be automatically adjusted within a certain range depending on the impedance of the loop.釆In this way, the error of the port gain of the voice central office is large, and for the voice terminal with the same loop impedance, if the capacitance of the loop is different, even if the same gain will produce different voice quality, it will not be able to Guarantee the voice quality of each voice terminal. Summary of the invention

The purpose of the embodiments of the present invention is to provide a method for adjusting the parameters of a voice central office port, which is to solve the problem that the voice quality of the voice signal cannot be guaranteed when the voice signal is transmitted through the network in the prior art. The embodiment of the present invention is implemented by the method for adjusting a voice local port parameter, and the method includes the following steps:

Receiving a voice signal sent by the voice terminal;

Comparing the received voice signal with a preset standard voice signal, and determining whether the quality of the received voice signal reaches a predetermined voice quality;

If the quality of the received voice signal does not reach the predetermined voice quality, the port parameters of the voice office are adjusted.

Another object of the embodiments of the present invention is to provide an adjustment system for a voice central office port parameter, where the system includes:

a voice signal receiving unit, configured to receive a voice signal sent by the voice terminal;

a voice quality determining unit, configured to compare the received voice signal with a preset standard voice signal, and determine whether the quality of the received voice signal reaches a predetermined voice quality;

The port parameter adjusting unit is configured to adjust a port parameter of the voice central office when the quality of the received voice signal does not reach a predetermined voice quality.

In the embodiment of the present invention, by comparing the received voice signal with a standard voice signal preset by the voice office end, when the voice quality of the received voice signal does not reach the predetermined voice quality, adjusting the port of the voice office end affecting the voice quality Parameters until the received speech signal reaches a predetermined speech quality. In the embodiment of the present invention, the port parameters of the voice central office are set according to the last actual voice quality experience of the voice terminal user, so that the best voice quality can be provided for each voice terminal user. DRAWINGS

1 is a flowchart of an implementation of a method for adjusting a voice local port parameter according to an embodiment of the present invention; FIG. 2 is a structural diagram of a system for adjusting a voice local port parameter according to a first embodiment of the present invention; A structural diagram of an adjustment system for a voice central office port parameter provided by the second embodiment. detailed description The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the embodiment of the present invention, by comparing the voice signal sent by the received voice terminal with the standard voice signal preset by the voice office end, the port parameters of the voice office end are adjusted according to the comparison result, so that each voice terminal user can be provided The best voice quality under conditions. In the embodiment of the present invention, the voice central office may be an access network device, for example, a FSAN (Full Service Access Networks) device, or a switch device, for example, a digital subscriber line access multiplexer ( DSLAM, Digital Subscriber Line Access Multiplexer), the voice terminal can be a fixed telephone, and the like.

FIG. 1 is a flowchart showing an implementation process of a method for adjusting a voice central office port parameter according to an embodiment of the present invention, which is as follows:

In step S101, a voice signal transmitted by the voice terminal is received.

In step S102, the standard voice signal preset by the voice office end is combined with a certain voice quality measurement algorithm to determine whether the quality of the received voice signal reaches a predetermined voice quality. If yes, the port parameter of the voice office end does not need to be adjusted, and the processing ends; If not, step S103 is performed. The speech quality measurement algorithm may use a Mean Opinion Score (MOS) or a Perceptual Evaluation of Speech Quality (PESQ).

The MOS algorithm is an algorithm that measures the quality of speech based on the value of MOS. The MOS value was originally proposed by the International Organization for Standardization. That is, 40 to 60 representative people are invited to listen to the same voice sample, and then vote on the voice quality of the sample transmitted over the IP network. As speech changes due to language, age, and gender, scores are given different meanings. This is a purely subjective qualitative measurement. The International Organization for Standardization selects the same scores for different ages, genders, and language groups within a very wide range of hearing, and the criteria for making voice quality are as follows:

5 points (excellent): The voice quality is good, the hearing is clear, the delay is small, and the communication is smooth; 4 points (good): The voice quality is slightly worse, the hearing is clear, the delay is small, the communication is lacking smoothly, there is noise; 3 points (middle): the voice quality is general, the listening is not clear, there is a certain delay, you can communicate;

2 points (poor): The voice quality is stubborn, the listening is not clear, the delay is large, and the communication is repeated many times;

1 point: The voice quality is very poor, I don't understand, the time delay is big, and the communication is not smooth.

When using the MOS algorithm, a standard speech signal obtained according to the MOS algorithm is preset at the voice office, and then the MOS algorithm is used to compare the received speech signal with the standard speech signal to determine whether the quality of the received speech signal is The predetermined voice quality is achieved. The predetermined voice quality can be either a value or a range. For example, when the standard voice signal preset by the voice central office is used as a reference, and the voice quality of the received voice signal is scored by 4 or more according to the MOS algorithm, it is considered that the predetermined voice quality is achieved, and the port parameter of the voice office end does not need to be adjusted. Otherwise, step S103 is performed.

In step S103, the port parameters of the voice office end are adjusted. The port parameters of the voice office include all parameters that affect voice quality, such as port gain and port impedance. As an embodiment of the present invention, when adjusting the port parameters of the voice central office, the adjustment may be performed according to a certain order, for example, the port gain is adjusted from small to large, and the step size may be set to ldB; the port impedance may be based on previous experience. The port impedance value that has the highest probability of occurrence begins to adjust. After the voice office port parameters are adjusted according to a certain order, step S102 is performed again until the voice quality reaches the predetermined voice quality by adjusting the port parameters of the voice office.

Since the MOS algorithm is a voice quality measurement algorithm based on the actual experience of the voice terminal user, when the received voice signal is compared with a standard voice signal preset by the voice central office and reaches a predetermined voice quality, it can be based on each voice terminal user. The actual experience is provided to each voice terminal user with the best voice quality.

As another embodiment of the present invention, when adjusting the port parameters of the voice central office, firstly, according to the received voice signal and the standard voice signal preset by the voice local office, a certain voice quality measurement algorithm is used to calculate and receive The value of the port parameter required for the voice signal quality to reach the predetermined voice quality directly adjusts the value of each port parameter of the voice office end to the value of the corresponding port parameter calculated above. A certain voice quality measurement algorithm may be a MOS algorithm or a PESQ algorithm. For After confirming that the adjusted voice office port parameter can reach the predetermined voice quality, step S102 is performed again until the adjusted voice office port parameter is confirmed to enable the received voice signal to reach the predetermined voice quality.

In order to avoid comparing the received voice signal with the standard voice signal preset by the voice office end each time the voice communication is performed, thereby increasing the resource burden of the system, a timer can be set at the voice office end for the primary port parameter. After the adjustment is successful, the timer is started, and after a certain period of time, it is re-determined whether the received voice signal quality reaches the predetermined voice quality under the port parameter. Since the distance between the voice terminal user and the voice office end is small, setting a long time interval does not affect the quality of voice communication, and can not waste system resources too much.

The following is a description of the above method by using a voice terminal commonly used in the prior art to connect a VOIP system through a Double Tone Multi-Frequency (DTMF) dialing method.

The voice office of the existing VOIP system usually receives DTMF voice signals using a Field Programmable Gate Array (FPGA) or a Digital Signal Processing (DSP). Since the DTMF signal is a standard signal, the voice terminal dialed by DTMF mode must be designed according to a unified standard, that is, the voice office end presets (ie, enters) the standard DTMF before receiving the voice signal of the voice terminal. The speech signal determines the predetermined speech quality of the DTMF speech signal.

When receiving the DTMF voice signal of the voice terminal, the DTMF voice signal is compared with the standard DTMF voice signal preset by the voice office end by using the MOS algorithm or the PESQ algorithm to determine whether the quality of the received DTMF voice signal reaches a predetermined voice. The quality, for example, according to the MOS algorithm, with reference to the standard DTMF voice signal preset by the voice central office, and the score of the received DTMF voice signal is 4 or more, the DTMF voice signal is considered to achieve better voice quality. If the predetermined voice quality is reached, the port parameters of the voice local office need not be adjusted, and the voice office directly processes the DTMF voice signal and sends the signal to the receiver. If the predetermined voice quality is not achieved, the voice quality end port is affected. Parameters such as port gain, port impedance, etc. are adjusted. When the port parameters of the voice central office are adjusted, the parameters can be adjusted according to a certain order. For example, the step size of the port gain of the voice central office is set to ldB, and the port gain is adjusted from small to large, and the port impedance of the voice local end is adjusted according to the port parameters. According to past experience, the impedance with the highest probability of port parameters starts to be adjusted. After each adjustment, the voice quality measurement algorithm is used to compare the received DTMF voice signal with the standard DTMF voice signal preset by the voice office to determine whether the reservation is reached. Voice quality, until the port parameters in the voice office are adjusted to compare the received DTMF voice signal with the standard DTMF voice signal preset by the voice office to achieve a predetermined voice quality. The voice quality measurement algorithm may also be used to calculate the value of the port parameter required to achieve the predetermined voice quality according to the received DTMF signal and the standard DTMF signal preset by the voice central office, and directly adjust the port parameter of the voice central office to The above calculated value is sufficient.

The method for adjusting the port parameters affecting voice quality in the voice central office is to use the last actual voice quality experience of each voice terminal user as a basis for adjusting the port parameters of the voice central office, and improve the VOIP system for each voice terminal. User's voice quality.

It can be understood that the method is not only applicable to the DTMF voice signal sent by the voice terminal as a comparison basis, but also can be used as a comparison basis by using other voice signals sent by the voice terminal. In this case, the voice office end needs to preset the voice signal corresponding to the voice signal. Standard voice signal.

It can be understood that the method is applicable not only to the VOIP system, but also to the Public Switched Telephone Network (PSTN) system and other voice communication systems to improve the voice quality and provide the most for each voice terminal user. Good voice quality.

One of ordinary skill in the art will appreciate that all or part of the steps in implementing the above-described embodiments can be accomplished by program-related hardware. The software corresponding to the embodiment can be stored in a computer readable storage medium such as ROM/RAM, disk, optical disk, and the like.

FIG. 2 shows the structure of a voice central office port parameter setting system according to the first embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown.

The voice signal receiving unit 21 receives the voice signal transmitted by the voice terminal, and the voice signal may be a DTMF signal, or other voice signal. The voice signal receiving unit 21 can be a separate electronic The unit circuit implementation can also be implemented by the FPGA or DSP of the voice office, without adding additional electronic equipment. The voice quality determining unit 23 determines whether the received voice signal is a voice signal of a predetermined voice quality according to a standard voice signal preset by the voice office end, such as a MOS algorithm or a PESQ algorithm, and if not, passes the port. The parameter adjustment unit 25 adjusts port parameters of the voice central office, such as port gain, port impedance, etc., so that the received voice signal reaches a predetermined voice quality. In order to ensure that the predetermined speech quality is obtained, after the port parameter adjustment unit 25 adjusts the port parameters, the speech quality judging unit 23 re-determines whether the speech quality reaches the predetermined speech quality until the predetermined speech quality is reached.

When the port parameter adjustment unit 25 adjusts the port parameters according to a certain order, the port parameter adjustment unit 25 includes a step size setting module 251 and a port parameter setting module 253. The step size setting module 251 sets the step size of each port parameter adjustment. For example, when the port gain is adjusted from small to large, the step size of the port gain can be set to ldB, and the step size of the port impedance is set to the probability of impedance occurrence. Step size. The port parameter setting module 253 sets the step size set by the module 251 according to the step size.

The structure of the voice central office port parameter setting system provided by the embodiment of the present invention further includes a timer 27, which is started after the primary port parameter adjustment is successful, in order to avoid the voice quality comparison and increase the system burden. The timer 27 is configured to reduce the frequency of the voice office port parameter adjustment, and set the time length for the timer 27 to recalculate whether the voice quality is a predetermined voice quality after the voice communication passes the set length of time. The workflow of the timer 27 is to start the timer when the voice quality determining unit 23 determines that the received voice signal quality reaches the predetermined voice quality, and if the timer reaches the predetermined time, trigger the voice quality determining unit 23 to determine. Whether the quality of the received speech signal reaches a predetermined speech quality. Since the distance between the voice terminal user and the voice office is less changed, setting a long time interval does not affect the quality of voice communication, and can not waste system resources too much.

3 is a diagram showing the structure of a voice central office port parameter setting system according to a second embodiment of the present invention, which is different from the first embodiment in that the port parameter adjustment unit 25 is based on the received voice. The standard parameter voice signal preset by the signal and the voice terminal calculates the value of the port parameter required to achieve the predetermined voice quality, and the port parameter adjustment unit 25 includes the port parameter calculation module 252 and the port parameter setting module 253, and the port parameter. The calculating module 252 calculates a value of the port parameter required to reach the predetermined voice quality by using the voice quality measurement algorithm according to the received voice signal and the standard voice signal preset by the voice office. The port parameter setting module 253 sets the port parameter of the voice terminal to: the value of the corresponding port parameter calculated by the port parameter calculation module 252. Other units are identical in function to those implemented by the corresponding units in the first embodiment.

In summary, in the embodiment of the present invention, by using a voice quality measurement algorithm, according to the difference between the received voice signal and the standard voice signal preset by the voice central office, the port parameters of the voice office end are set, The standard voice signal preset by the voice central office measures the voice quality according to the actual voice quality experience of the voice terminal user, and sets the port parameters of the corresponding voice office end, thereby providing the best voice quality for each voice terminal user.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

Claim

A method for adjusting a parameter of a voice central office port, characterized in that the method comprises the following steps:

Receiving a voice signal sent by the voice terminal;

Comparing the received voice signal with a preset standard voice signal to determine whether the quality of the received voice signal reaches a predetermined voice quality;

2. The method for adjusting a voice central office port parameter according to claim 1, wherein the adjusting the port parameter of the voice central office is specifically:

Set the step size of the port parameter adjustment;

Adjusting the port parameters of the voice central office according to the step size.

The method for adjusting the parameters of the voice central office port according to claim 1, wherein the adjusting the port parameters of the voice central office is specifically:

Calculating a port parameter value according to a difference between the received voice signal and a preset standard voice signal; setting a port parameter of the voice office end to the calculated port parameter value.

The method for adjusting a voice central office port parameter according to claim 1, wherein the determining whether the quality of the received voice signal reaches a predetermined voice quality is specifically: using a voice quality measurement algorithm to determine a location Whether the quality of the received speech signal reaches a predetermined speech quality.

The method for adjusting a voice central office port parameter according to any one of claims 1 to 4, wherein the port parameters of the voice central office include a port gain and a port impedance.

The method for adjusting a voice central office port parameter according to any one of claims 1 to 4, further comprising:

If the quality of the received voice signal reaches a predetermined voice quality, starting a timer; if the timer reaches a predetermined time, re-determining whether the quality of the received voice signal is up to To the scheduled voice quality.

A voice system port parameter adjustment system, the system comprising: a voice signal receiving unit (21), configured to receive a voice signal sent by a voice terminal;

a voice quality determining unit (23), configured to compare the received voice signal with a preset standard voice signal, and determine whether the quality of the received voice signal reaches a predetermined voice quality;

The port parameter adjusting unit (25) is configured to adjust the port parameter of the voice central office when the received voice signal quality does not reach the predetermined voice quality.

The system for adjusting a voice central office port parameter according to claim 7, wherein the system further comprises:

a timer (27) for starting a timer (27) when the voice quality determining unit (23) determines that the received voice signal quality reaches a predetermined voice quality; if the timer (27) reaches a predetermined time, The voice quality determining unit (23) is triggered to determine whether the quality of the received voice signal reaches a predetermined voice quality.

The system for adjusting a voice central office port parameter according to claim 7 or 8, wherein the port parameter adjustment unit (25) comprises:

a step setting module (251) for setting a step size of the port parameter adjustment;

The port parameter setting module (253) is configured to adjust the port parameter of the voice central office according to the step set by the step size setting module (251).

a port parameter calculation module (252), configured to calculate a port parameter value according to a difference between the voice signal obtained from the voice quality determining unit (23) and a preset standard voice signal;

The port parameter setting module (253) is configured to set a port parameter of the voice central office to a port parameter value calculated by the port parameter calculation module (252).

The system for adjusting a voice central office port parameter according to claim 7 or 8, wherein the port parameters of the voice central office include a port gain and a port impedance.