CN1728584A - Method for controlling encoding speed and power in procedure of voice mobile communication - Google Patents
Method for controlling encoding speed and power in procedure of voice mobile communication Download PDFInfo
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Abstract
Scheme of self-adaptive variable multiple speeds is adopted in the invention. Base on condition of input device at operational manager and current state of network, whether encoding speed of the scheme is needed to adjust is determined as well as quality threshold of power control at current encoding speed is needed to change is determined. The said determination includes following steps: based on balance between quality of communication signal and speed of communication, determining an index to be controlled mainly (encoding speed, quality threshold of power control or service level); measuring index of service quality; when the measured index of service quality is at same level, higher or lower than range of current encoding speed, the invention makes decision for how to change encoding speed and/or quality threshold of power control accordingly.
Description
(1)
Technical field
The present invention relates to a kind of code rate of voice communication and method of signal power control of in mobile communication system, realizing; Or rather, relate to a kind of Method of Adaptive Control that in voice communication, realizes code rate and signal power.
(2)
Background technology
In mobile communication system, because signal of communication will pass through abominable air environment sometimes when propagating, for offsetting the influence of environment, the technical staff has found out a lot of methods and has improved quality of signals, reduces the fluctuating level of signal.These methods for example comprise power control method, link circuit self-adapting method (link adaptation) and variable bit rate encoding and decoding rate method.After having adopted these methods, not only the service quality of signal improves under the dynamic disturbance of wide region and communication environments, and internetwork interference also is minimized, and has therefore also correspondingly strengthened power system capacity (number of users that can serve in the network).
Above-mentioned variable rate encoding rate method be used for voice service a kind of for the adaptive multi-rate method (adaptivemulti-rate, AMR).This method can be determined a plurality of speech encoding rates, and wherein each speed is corresponding to the error control level of different stage.The AMR coding adopts the most effective mode of operation at that time dynamically in response to the wireless signal condition.Compare with fixing encoding rate, AMR can work under worse radio condition, and provides high-quality, can realize the voice service freely changed between a plurality of speed.This technology can be weighed signal service quality and these two factors of network capacity as a function of network load.Between this many speed flexibly switch technology both be applicable to 2G mobile communication system system, also be applicable to various 3G mobile communication system, comprise TD-SCDMA, WCDMA and CDMA2000.
The definite voice rate that is adopted in each speech frame depends on the residing at that time real wireless channel environment of signal.The coding adaptation algorithm can be chosen desirable voice rate (or code rate) according to a channel quality function.Under abominable propagation conditions, code rate can be chosen best transmission protection code rate.Under good propagation conditions, can choose the code rate that makes service quality best.The adaptive mode of coding depends on the channel quality measurements of being implemented in user terminal and the network, and the control information of transmitting together with speech data.
Code rate is for the self adaptation of user terminal code rate, and the necessary estimated channel quality of network terminal is determined code rate best under existing propagation conditions, and this information (being the code rate order) is sent to user terminal.For the coding adaptation of network terminal, user terminal must estimated channel quality, and this quality information is sent to network, and this quality information can be mapped as " suggestion " code rate in network.The period of change of code rate may diminish to the code rate of a speech frame in theory.Because signal propagation delays and signal factor such as the requisite filtering operation of institute in the coding adaptation process, the rate of change of code rate can be adjusted to a lower speed level but in practice.Code rate is in addition when selecting a new code rate, and code rate and new corresponding transmitting power of code rate and quality threshold also can correspondingly change.
The workflow diagram of self-adapting changeable speed mode has been shown among Fig. 1 in the communication process.When setting up a calling or handover process, corresponding communication apparatus can be specified a kind of code rate, and specifies a service quality threshold value corresponding to this code rate (being the speed quality threshold).This speed quality threshold available signal noise power ratio (SIR), carrier to interference power ratio (CIR), FER (Floating Error Rate) (FER) or bit error rate (BER) (BER) are represented.Code rate triggers code rate with a speed timer and periodically switches.The code rate receiving terminal constantly detects the service quality of communicating by letter under the present encoding speed.In case the speed timer then, relevant devices can be established the service quality that is detected in the last cycle, and it and rate service threshold value are compared, and generates a rate command then, and this order is sent to the speech coder of transmitting terminal.This periodic process can repeatedly repeat in a communication process.
Fig. 2 is the flow chart that carries out power control in the communication process.In this process, carry out closed power control to adjust transmitting power according to the power command (POWER COMMAND) that returns from receiving terminal.This power command is to generate according to relevant link quality measurements result.Link-quality and power control of quality threshold value can be represented with signal noise power ratio (SIR), carrier to interference power ratio (CIR), FER (Floating Error Rate) (FER) or bit error rate (BER) (BER).Can be divided into two loops to described closed power control procedure basically, promptly interior ring and outer shroud.In ring be to carry out fast, current link quality and power control of quality threshold value are compared process with generation power command (POWER COMMAND) frame by frame, and outer shroud be relatively slow, periodically adjust the process of power control of quality threshold value.Similar with the switching of AMR code rate, receiving terminal also constantly detects link-quality, and the cycle of power control of quality threshold value is also decided by the outer shroud timer.
The process of the code rate of selection AMR and the difference of power control process are:
(1) in fact, no matter which code rate what select is, the fluctuation that inner loop power control should be able to frame by frame reflection link-quality, and carry out the delay that power control command took place should be the smaller the better.Change to power control of quality threshold value can be carried out fast enough by external circule power control equipment.In contrast, the switching of AMR code rate just can not be finished in a very short time, because this process relates to the more than one network equipment (base station, base station controller or the like) and protocol layer (L1, L2 and L3).This means the switching of code rate can not be fast enough in response to the fluctuation of service quality;
Needn't notify the side of being transmitted when (2) the exterior ring power control appliance is adjusted power control of quality threshold value, and power control equipment does not know which present code rate is yet; And on the other hand, transmitting terminal then should be both notified in the switching of AMR code rate code rate, also notified receiving terminal.
Fig. 3 is the flow chart of the switching and the power control mechanism associated working of AMR code rate.Operation principle according to the switching of AMR code rate and power control, because the code rate variation of AMR is slower in the reality, and the power of ring control frame by frame so can not twined (intertwining) between the switching of code rate and the inner-loop power control when AMR and the associated working of inner loop power control system fast in response to link-quality simultaneously.But the situation of external circule power control is then different, and the adjustment of its power control is carried out with a slower speed, but the renewal rate of the quality threshold of power control simultaneously should be able to keep good quality of service under the dynamic communication of a broad and interference environment.So the code rate receiving terminal is difficult in sometimes to switch code rate or adjust between the power control of quality threshold value and makes one's choice, because the purpose of this dual mode all is to improve the quality of communication and the variation that response signal is propagated and disturbed.
When adopting a fixing code rate, because control signal power is the only resource of adjustment signal communication environments and quality-of-service factor fluctuation, therefore being wrapped in this case between the control of the switching of the code rate of AMR in this case and power do not exist, and promptly do not need to pay close attention to especially this problem.But under the situation that adopts AMR different, a plurality of code-change speed, this winding just becomes the problem that needs solve.Therefore, this communication system need a kind of method remove under the code-change speed AMR condition code rate variation and power control between winding.
(3)
Summary of the invention
For solving the winding problem of selecting under the many speed of self-adapting changeable (AMR) between code rate and the exterior ring power control, the invention discloses a kind of method based on the priority level notion, be used to switch code rate, and the power control of quality threshold value of adjusting each code rate.The main points of the inventive method be according to operator and equipment initial conditions and present network state adjust select AMR another code rate to change the enforcement order of these two kinds of means of power control of quality threshold value.Priority level method of the present invention has adopted the indexs such as current power surplus by the user class of operator being determined service quality, current system loading surplus, base station and mobile radio station, the power control of quality threshold value that is used to determine the switching of code rate or adjusts present encoding speed.Adopt this method, in network, can implement and adjust means flexibly.On the one hand, whether the receiving terminal decision changes code rate, and on the other hand, transmitting terminal also can participate in whether responding the order from receiving terminal.
Specifically, according to an aspect of the present invention, the invention discloses the method for carrying out signal encoding speed and power control in a kind of voice mobile communication process, adopt many speed of self-adapting changeable scheme, determine whether needing to adjust the code rate of the many speed of self-adapting changeable and the power control of quality threshold value that whether needs to change present encoding speed according to the equipment initial conditions of operator and current this two classes parameter of network state; Comprise:
(1) according to balance, determines an index that needs major control to signal of communication quality and traffic rate;
(2) measure Service Quality Metrics, provide respectively when this Service Quality Metrics is in, is higher than and be lower than current code rate scope, correspondingly make a change to described code rate code rate and/or corresponding to the power control of quality threshold value of this code rate code rate.
According to a further aspect of the present invention, the present invention's top-priority control index when carrying out the control of signal rate and power is the code rate code rate, and:
(1) if Service Quality Metrics is in the present code rate scope, then code rate and power control of quality threshold value remain unchanged;
(2) if Service Quality Metrics is higher than present code rate scope, code rate has the higher data transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value.
(3) if Service Quality Metrics is higher than present code rate scope, do not have which code rate to have the higher data transmission rate simultaneously, then whether upgrade the service class that power control of quality threshold value depends on operator and this user;
(4) if Service Quality Metrics is lower than current code rate scope, code rate has lower message transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value;
(5) if Service Quality Metrics is lower than current code rate scope, do not have which code rate to have lower message transmission rate simultaneously, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
According to another further aspect of the present invention, the present invention's top-priority control index when carrying out the control of signal rate and power is a power control of quality threshold value, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
According to another further aspect of the present invention, the present invention is carrying out signal rate and power when control, when higher, then selects to have the code rate of the maximum data transmission rate as active user's service class, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
On the other hand, the invention discloses the method for carrying out signal rate and power control in a kind of voice mobile communication process, adopt many speed of self-adapting changeable scheme, a specific mode of priority is taked in these three parameter decisions of the grade of service, power headroom and system load according to the user, determine whether needing to adjust the code rate of the many speed of self-adapting changeable again according to the equipment initial conditions of operator and current this two classes parameter of network state, and the power control of quality threshold value that whether needs to change present encoding speed.
According to a further aspect of the present invention, described specific mode of priority is that code rate is preferential, and:
(1) if Service Quality Metrics is in the present code rate scope, then code rate and power control of quality threshold value remain unchanged;
(2) if Service Quality Metrics is higher than present code rate scope, code rate has the higher data transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value.
(3) if Service Quality Metrics is higher than present code rate scope, do not have which code rate to have the higher data transmission rate simultaneously, then whether upgrade the service class that power control of quality threshold value depends on operator and this user;
(4) if Service Quality Metrics is lower than current code rate scope, code rate has lower message transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value;
(5) if Service Quality Metrics is lower than current code rate scope, do not have which code rate to have lower message transmission rate simultaneously, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
According to another further aspect of the present invention, described specific mode of priority is that power control of quality threshold value is preferential, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
According to another further aspect of the present invention, when higher, adopt the service class mode of priority as active user's service class, and select to have the code rate of the maximum data transmission rate, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
According to a further aspect of the invention, in said method, related link-quality and power control of quality threshold value can be represented with among signal noise power ratio, carrier to interference power ratio, FER (Floating Error Rate) and the bit error rate (BER).
Fig. 4 is for removing the flow chart of the winding that is taken place between code rate and the adjustment power control of quality threshold value.This figure has in fact summarized the main feature of the inventive method.
The present invention stores relevant parameter by a tables of data, the parameter that comprises expression network current state, and with the basis of these parameters as adjustment means of different priority level, these means comprise when the timer of the present encoding rate quality of service that is used to estimate AMR arrives the stipulated time, switch the code rate of AMR, perhaps be adjusted at and carry out the required power control of quality threshold value of power control under the current AMR code rate.
(4)
Description of drawings
Fig. 1 is an AMR flow chart in the communication process;
Fig. 2 be in the communication process in carry out power control flow chart;
Fig. 3 be in the communication process in carry out simultaneously AMR and power control flow chart;
Fig. 4 is for removing the flow chart of the winding that is taken place between code rate and the adjustment power control of quality threshold value.
(5)
Embodiment
Example 1: code rate is preferential
When timer sends the clock signal of carrying out qos measurement,
(1) if service quality (for example representing with FER) index is in the present code rate scope (FER scope), then code rate and power control of quality threshold value remain unchanged;
(2) if Service Quality Metrics is higher than present code rate scope, code rate has the higher data transmission rate simultaneously, then should select a new speed quality threshold (Mode Quality Threshold) and an associated power control of quality threshold value.If there is not which code rate to have the higher data transmission rate, then whether upgrade the service class that power control of quality threshold value depends on operator and this user;
(3) if Service Quality Metrics is lower than current code rate scope, code rate has lower message transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value.If there is not which code rate to have lower message transmission rate, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
Example 2: power control of quality threshold value is preferential
When timer sends the clock signal of carrying out qos measurement,
(1) if service quality (for example representing with FER) index is in the present code rate scope (FER scope), then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value.If whether the situation of Zao Gao signal power comparatively then needs to upgrade the service class that power control of quality threshold value depends on operator and this user.
Example 3: service class is preferential
When timer sends the clock signal of carrying out qos measurement, and this user's service class then must select to have the code rate of the maximum data transmission rate when higher.
On this basis,
(1) if service quality (for example representing with FER) index is in the present code rate scope (FER scope), then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value.If whether the situation of Zao Gao signal power comparatively then needs to upgrade the service class that power control of quality threshold value depends on operator and this user.
Example 4: intelligence is preferentially controlled
In this example, just do not determine when priority is beginning, and will be selected according to network state.In the functional relation below, represent user's grade of service, represent power headroom, represent system load with system_load with Power_margin with GoS_of_user.In practice, actually adopt at that time that code rate is preferential, power control of quality threshold value preferential, any in the service class priority scheduling mode of priority, depend on the optimization of doing according to factors such as the network equipment and user loads.That is to say, we can with following formula represent and the determined link adaptation scheme in priority:
Priority_codec＝f1(GoS_of_user，Power_margin，system_load)；
Priority_PC_quality_threshold＝f2(GoS_of_user，Power_margin，system_load)；
Priority_PC_service_grade＝f3(GoS_of_user，Power_margin，system_load)；
In practice, can decide functional relation between various modes of priority and this three parameters according to network and user's situation.
For example, when timer sends the clock signal of carrying out qos measurement, calculate the above-mentioned priority factor, with the link adaptation scheme of selecting one to have preferential adjustment order, a scheme that is above-mentioned example 1 to the example 3, again according to above-mentioned to the adjustment sequence starting adjustment process of example 1 to example 3.For example, if the Priority_codec value is higher than two values (Priority_PC_quality_threshold and Priority_PC_service_grade) in addition, then carry out the set-up procedure shown in the example 1.
Those skilled in the art are not difficult according to the above-mentioned description of this invention, understand and amplify out various modification of the present invention.
Claims (9)
1, carry out the method for signal encoding speed and power control in a kind of voice mobile communication process, adopt many speed of self-adapting changeable scheme, determine whether needing to adjust the code rate of the many speed of self-adapting changeable and the power control of quality threshold value that whether needs to change present encoding speed according to the equipment initial conditions of operator and current this two classes parameter of network state; Comprise:
(1) according to balance, determines an index that needs major control to signal of communication quality and traffic rate;
(2) measure Service Quality Metrics, provide respectively when this Service Quality Metrics is in, is higher than and be lower than current code rate scope, correspondingly make a change to described code rate and/or corresponding to the power control of quality threshold value of this code rate.
2, the method for claim 1 is characterized in that the index of preferential control is a code rate, and:
(1) if Service Quality Metrics is in the present code rate scope, then code rate and power control of quality threshold value remain unchanged;
(2) if Service Quality Metrics is higher than present code rate scope, code rate has the higher data transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value.
(3) if Service Quality Metrics is higher than present code rate scope, do not have which code rate to have the higher data transmission rate simultaneously, then whether upgrade the service class that power control of quality threshold value depends on operator and this user;
(4) if Service Quality Metrics is lower than current code rate scope, code rate has lower message transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value;
(5) if Service Quality Metrics is lower than current code rate scope, do not have which code rate to have lower message transmission rate simultaneously, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
3, the method for claim 1 is characterized in that the index of preferential control is a power control of quality threshold value, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
4, the method for claim 1 when higher, then selects to have the code rate of the maximum data transmission rate as active user's service class, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
5, carry out the method for signal rate and power control in a kind of voice mobile communication process, adopt many speed of self-adapting changeable scheme, a specific mode of priority is taked in these three parameter decisions of the grade of service, power headroom and system load according to the user, determine whether needing to adjust the code rate of the many speed of self-adapting changeable again according to the equipment initial conditions of operator and current this two classes parameter of network state, and the power control of quality threshold value that whether needs to change present encoding speed.
6, method as claimed in claim 5 is characterized in that described specific mode of priority is that code rate is preferential, and:
(1) if Service Quality Metrics is in the present code rate scope, then code rate and power control of quality threshold value remain unchanged;
(2) if Service Quality Metrics is higher than present code rate scope, code rate has the higher data transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value.
(3) if Service Quality Metrics is higher than present code rate scope, do not have which code rate to have the higher data transmission rate simultaneously, then whether upgrade the service class that power control of quality threshold value depends on operator and this user;
(4) if Service Quality Metrics is lower than current code rate scope, code rate has lower message transmission rate simultaneously, then should select a new speed quality threshold and an associated power control of quality threshold value;
(5) if Service Quality Metrics is lower than current code rate scope, do not have which code rate to have lower message transmission rate simultaneously, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
7, method as claimed in claim 5 is characterized in that described specific mode of priority is that power control of quality threshold value is preferential, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
8, method as claimed in claim 5 is characterized in that as active user's service class adopting the service class mode of priority when higher, and selects to have the code rate of the maximum data transmission rate, and:
(1) if Service Quality Metrics is in the present code rate scope, then power control of quality threshold value remains unchanged;
(2) if Service Quality Metrics is higher than current code rate scope, then should reduce power control of quality threshold value;
(3) if Service Quality Metrics is lower than current code rate scope, then should add high-power control of quality threshold value; If signal power is relatively very low, then whether need to upgrade the service class that power control of quality threshold value depends on operator and this user.
9, as the described method of arbitrary claim among the claim 1-8, wherein link-quality and power control of quality threshold value can be represented with among signal noise power ratio, carrier to interference power ratio, FER (Floating Error Rate) and the bit error rate (BER).
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| CN 200410054875 CN1728584A (en) | 2004-07-31 | 2004-07-31 | Method for controlling encoding speed and power in procedure of voice mobile communication |
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| CN 200410054875 CN1728584A (en) | 2004-07-31 | 2004-07-31 | Method for controlling encoding speed and power in procedure of voice mobile communication |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056466B (en) * | 2007-02-12 | 2010-09-08 | 华为技术有限公司 | A method and device for adjusting the voice encoding and decoding mode in the call process |
| CN101335687B (en) * | 2007-06-27 | 2012-01-11 | 中兴通讯股份有限公司 | Subscriber service quality guarantee method for radio communication system |
| CN102376306A (en) * | 2010-08-04 | 2012-03-14 | 华为技术有限公司 | Method and device for acquiring level of speech frame |
| CN104301290A (en) * | 2013-07-15 | 2015-01-21 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN105635765A (en) * | 2015-12-28 | 2016-06-01 | 惠州市伟乐科技股份有限公司 | Self-adaptive environment encoder and encoding method |
| CN110505658A (en) * | 2018-05-16 | 2019-11-26 | 中国电信股份有限公司 | Voice rate method of adjustment, terminal and VoLTE system |
-
2004
- 2004-07-31 CN CN 200410054875 patent/CN1728584A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056466B (en) * | 2007-02-12 | 2010-09-08 | 华为技术有限公司 | A method and device for adjusting the voice encoding and decoding mode in the call process |
| CN101335687B (en) * | 2007-06-27 | 2012-01-11 | 中兴通讯股份有限公司 | Subscriber service quality guarantee method for radio communication system |
| CN102376306A (en) * | 2010-08-04 | 2012-03-14 | 华为技术有限公司 | Method and device for acquiring level of speech frame |
| CN102376306B (en) * | 2010-08-04 | 2013-01-23 | 华为技术有限公司 | Method and device for acquiring level of speech frame |
| CN104301290A (en) * | 2013-07-15 | 2015-01-21 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN104301290B (en) * | 2013-07-15 | 2018-11-09 | 联想(北京)有限公司 | A kind of method and electronic equipment of information processing |
| CN105635765A (en) * | 2015-12-28 | 2016-06-01 | 惠州市伟乐科技股份有限公司 | Self-adaptive environment encoder and encoding method |
| CN110505658A (en) * | 2018-05-16 | 2019-11-26 | 中国电信股份有限公司 | Voice rate method of adjustment, terminal and VoLTE system |
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