CN1991977B - Voice coding rate confirming method for radio communication - Google Patents
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Abstract
The invention provides a voice coding rate method to affirm the multi-rate voice coder and an affirming voice coding rate in wireless communication system. According to the method, it includes steps as following: the voice signal is coded into voice frame at a voice coding rate; the adjusting information of said voice information coding rate is generated based on the generating ratio or the times of the received said voice frame in every quality type. The method of the invention adjusts the voice coder mode according to the quality of received voice frame, so the error introduced by estimating the type of channel can be avoided; the accuracy of choice is increased, at the same time the cost of hardware is decreased. Besides, the threshold triggering mode shortens the responding time of the channel change; it suits to track the wireless circumstance which is declined.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of method of determining the speech encoding rate of rate vocoder more than also relates to the method for determining speech encoding rate in wireless communication system.
Background technology
In wireless communication system, many rate vocoder are generally adopted, as gsm system, WCDMA system, IS-95 system and cdma2000.Many rate vocoder have multiple vocoder mode, and every kind of pattern is a corresponding provenance bit rate (or speech encoding rate).The pattern of so-called many rate vocoder is adaptive, be exactly under the certain situation of total channel bit rate, select corresponding speech encoding rate according to channel condition, make that the voice quality under given channel condition is preferable, if for example channel condition is better, then can improve the ratio (promptly select bigger speech encoding rate) of source bit and channel-encoded bit, otherwise, the ratio (promptly selecting less speech encoding rate) of source bit and channel-encoded bit then should be reduced.
Fig. 1 is the block diagram of many rate vocoder system of prior art.As shown in Figure 1, this many rate vocoder system is made up of network or base station 100A and user terminal 100B.For the uplink and downlink link, quality information produces by the current channel status of estimation, and the network side that is controlled at of vocoder mode is realized.
In the vocoder mode adaptation procedure, receiver side (network side among Fig. 1 or subscriber terminal side) is finished the link quality measurements of input link and is produced the quality indication.For uplink adaptation (being determining of the user terminal speech encoding rate that sends to network), quality indication 170A directly offers row mode control module 160A.This unit with quality indication and a thresholding relatively, considering simultaneously may be from the restriction of network control 180A, thereby produces a vocoder mode order, the vocoder mode that the indication up-link is used.This vocoder mode order is sent to subscriber terminal side by in being with.In subscriber terminal side, the voice signal of input is encoded according to corresponding vocoder mode.For down-link adaptation (being determining of the network speech encoding rate that sends to user terminal), the downlink mode request generator 180B of user terminal compares a downlink quality indication and a thresholding, and produce the vocoder mode request, the first-selected vocoder mode of indicating downlink link.The vocoder mode request is transferred to network side by in being with.At network side, the vocoder mode request offers downlink mode control module 150A.This unit generates downlink mode control indication according to the vocoder mode request and from the possible restriction of network control.The final vocoder mode that generates is indicated as vocoder mode, and the speech data behind coding is transmission in band.At demoder 130A, 140A, 130B, 140B, the vocoder mode indication is decoded at receiver side, and is applied to the decoding to the speech data that receives.
Fig. 2 carries out the adaptive schematic diagram of pattern for many rate vocoder shown in Figure 1 system.Adaptive for vocoder mode, channel quality measurement must be mapped to vocoder mode, and this measures by quantification.In system shown in Figure 1, adopt the level of Carrier interference ratio quantizer to represent different vocoder mode.Also need to introduce hysteresis in mapping process, when avoiding channel measured value near the decision boundaries of two kinds of vocoder mode, shake fast appears in the vocoder mode of selection.Vocoder mode is selected from vocoder mode set shown in Figure 2, this vocoder set comprises rate vocoder pattern more than 4 kinds, correspondingly, the handoff threshold between the adjacent vocoder mode and the tabulation of hysteresis also are provided, wherein thresholding 1～3rd, and pattern i+1 is to the switch decision thresholding of pattern i, and thresholding 1～3 is the switch decision thresholding of pattern i to pattern i+1 with hysteresis 1～3 sum.Last row mode control module 150A and downlink mode request generator 180B will produce vocoder mode request and vocoder mode command according to vocoder mode set shown in Figure 2 and thresholding and hysteresis tabulation.These configuration parameters (vocoder mode set, thresholding and hysteresis) can define at call establishment stage, and can revise in switching or communication process.
The estimation of above-mentioned Carrier interference ratio not only needs the measure link quality, also needs to estimate current channel type.But the pairing voice quality of given Carrier interference ratio is different under the channel circumstance of rapid fading and slow fading, and estimates that current channel type is to be difficult to realize in actual applications, so this method is restricted in actual applications.
This shows, in wireless communication system, need provide a kind of definite method that need not to estimate the speech encoding rate of channel type.
Summary of the invention
An object of the present invention is to provide a kind of method of determining the speech encoding rate of rate vocoder more than, it is the variation of adaptive channel condition more accurately.
Foregoing invention purpose of the present invention realizes by the following method, comprises the following step:
(1) be speech frame with this one of them speech encoding rate of many rate vocoder with speech signal coding;
(2), generate the adjustment information of described speech signal coding speed according to the incidence of every kind of quality type of the described speech frame that receives or occurrence number continuously.
Said method is adjusted vocoder mode according to the quality of the speech frame that receives, and the error of having avoided the channel type estimation to introduce has improved the accuracy of selecting, and has also reduced hardware cost simultaneously.
Preferably, in said method, described speech frame has comprised frame and two kinds of quality types of bad frame, and judges that according to the error code information that described speech frame comprises it has been frame or bad frame.Be more preferably, described wrong indication information is the cyclic redundancy check bits that generates according at least a portion information bit in the described speech frame.
Preferably, in said method, the generating mode of described adjustment information is, if the described speech frame that receives continuously for the quantity of good frame greater than one first handoff threshold, then generate to increase the indication of described speech encoding rate,, then reduce the indication that generates described speech encoding rate if a bad frame occurs in less than the continuous described speech frame of one second handoff threshold in the quantity that receives, otherwise, generate the indication that described speech encoding rate is remained unchanged.
Another object of the present invention provides a kind of method of determining speech encoding rate in a wireless communication system, and it is the variation of adaptive channel condition more accurately.
Foregoing invention purpose of the present invention realizes that by the following method in the method, this wireless communication system comprises one first communicator and a second communication device, comprises following steps:
(1) at the described first communicator place, be speech frame with speech signal coding with a speech encoding rate;
(2) described speech frame is sent to described second communication device from described first communicator; And
(3) incidence of every kind of quality type of the described speech frame that receives according to described second communication device or occurrence number continuously generate the adjustment information of described speech signal coding speed.
Preferably, in said method, the generating mode of described adjustment information is, if the described speech frame that described second communication device receives continuously for the quantity of good frame greater than one first handoff threshold, then generate the indication that increases described speech encoding rate, if a bad frame occurs in less than the continuous described speech frame of one second handoff threshold in quantity that described second communication device receives, then generate the indication that reduces described speech encoding rate, otherwise, generate the indication that described speech encoding rate is remained unchanged.
Foregoing invention purpose of the present invention realizes by the following method that also in the method, wireless communication system comprises one first communicator and a second communication device, comprises the following step:
(1) described first communicator and second communication device are speech frame with first and second speech encoding rates with speech signal coding respectively;
(2) will send to described second communication device from described first communicator according to the speech frame of described first speech signal coding; And
(3) incidence of every kind of quality type of the described speech frame according to described first speech signal coding that receives according to described second communication device or occurrence number continuously generate the adjustment information of the described first and second speech signal coding speed.
Preferably, in said method, the generating mode of described adjustment information is, if the quantity that the described speech frame according to described first speech signal coding that described second communication device receives is good frame continuously is greater than one first handoff threshold, then generate the indication that increases described first and second speech encoding rates, if a bad frame occurs in less than the continuous speech frame of one second handoff threshold in quantity that described second communication device receives, then generate the indication that reduces described first and second speech encoding rates, otherwise, generate the indication that described first and second speech encoding rates are remained unchanged.
In a typical wireless communication system (for example personal portable telephone system), base station and user terminal communicate by Radio Link, first communicator and the second communication device of this moment can be base station and user terminal, or user terminal and base station.
The reason of mentioning when describing in front above-mentionedly determines that in a wireless communication system method of speech encoding rate also provides identical advantage.
The accompanying drawing summary
Below by preferred embodiment and accompanying drawing the present invention is done to set forth more fully, wherein:
Fig. 1 is the block diagram of many rate vocoder system of prior art.
Fig. 2 carries out the adaptive schematic diagram of pattern for many rate vocoder shown in Figure 1 system.
Fig. 3 illustrates the treatment scheme according to a preferred embodiment of many rate vocoder of the present invention pattern adaptation method.
Fig. 4 shows an embodiment who uses according to vocoder mode adaptation method of the present invention in wireless communication system.
Fig. 5 shows another embodiment that uses according to vocoder mode adaptation method of the present invention in wireless communication system.
Fig. 6 shows the structure of the speech frame that adopts in the Figure 4 and 5 illustrated embodiment.
Fig. 7 show one in the PHS system base station send the process flow diagram of vocoder mode adaptation parameter to user terminal.
Embodiment
In the present invention, wireless communication system is meant the network system that the two ends of setting up exchange message communicate by wireless channel, and its example includes but not limited to cellular mobile system, satellite communication system, cordless telephone system, mobile cluster communication system etc.Will be understood that by following description principle of the present invention is applicable to the wireless communication system that encoding and decoding of various employing multi-rate speech and channel coding/decoding combine.
According to method of the present invention, adaptive for the vocoder mode that realizes transmitting terminal in a wireless communication system, the quality of the speech frame that will receive according to receiving end adopts the thresholding triggering mode to generate the adjustment information of the speech encoding rate of transmitting terminal.Trigger incidence or continuous occurrence number that thresholding comprises every kind of quality type of speech frame, the content of adjustment information comprises whether adjust the speech encoding rate of transmitting terminal, and adjustment if desired, then is the speech encoding rate that increases or reduce transmitting terminal.
In the present invention, the quality of speech frame adopts various can the sign by measuring the information that directly or indirectly obtains.In one embodiment of the invention, by being provided, the error code information that detects or correct the source bits mistake determines the quality of speech frame in speech frame, for example can partly or entirely source bits or information bit generate corresponding check bit in according to speech frame at transmitting terminal, and check bit inserted (for example afterbody of speech frame) sends to receiving end in the speech frame, and at receiving end, according to the source bits in the speech frame that receives generate check bit and with this frame that compares to determine that receives be that frame or bad frame are (if for example inconsistent, judge that then this frame is a bad frame, otherwise be frame).The example of verification mode comprises CRC check, parity checking or adds up and all multimodes such as verification.Though it is pointed out that in addition and superincumbently for example describe, the quality type of speech frame only has two types of good frame and bad frames, and this does not get rid of speech frame can two or more quality types.For the one of ordinary skilled in the art; other variations beyond the aforesaid way also is conspicuous, and the concrete mode of therefore weighing the concrete mode of speech frame quality and selection speech frame quality type should not constitute the qualification to protection domain of the present invention.
Above-mentioned thresholding triggers wherein a kind ofly may mode be, when receiving end when transmitting terminal receives speech frame with a speech encoding rate coding, if be that the quantity of frame is greater than certain numerical value of N continuously
Up, show that then transmission environment may support higher speech encoding rate, therefore ask transmitting terminal to improve current speech encoding rate or select the bigger vocoder mode of speech encoding rate; If the continuous speech number of frames that receiving end receives does not reach certain numerical value of N as yet
DownThe time bad frame just appears, show that then transmission environment do not support current speech encoding rate, therefore ask transmitting terminal to reduce the current speech code rate.When above-mentioned two kinds of situations did not occur, transmitting terminal was requested to make current speech encoding rate to remain unchanged.In this concrete mode, the triggering thresholding that improves speech encoding rate is based on recurring times N
UpPattern promptly triggers the request that improves speech encoding rate as long as surpass this thresholding, obviously, if improve quality of services for users (QoS), can suitably heighten numerical value of N
Up, vice versa.The triggering thresholding that reduces speech encoding rate is based on the incidence pattern, and (the 1/ speech frame quantity between twice bad frame was in succession perhaps adjusted behind the speech encoding rate to occurring bad frame speech frame quantity therebetween first 1/ last time) is greater than 1/N as long as incidence
Down, promptly trigger the request that reduces speech encoding rate, obviously,, can reduce thresholding 1/N if improve quality of services for users (QoS)
DownIn denominator (be numerical value of N
Down), vice versa.
In the mode of another possibility, trigger thresholding all based on the incidence pattern or all based on recurring time digital modeling.
In rate vocoder more than, incidence η
IjCan be commonly defined as:
Here n
IjFor after the last time is adjusted into i speech encoding rate, the speech frame quantity with j kind quality type of Fa Shenging in succession, m
IjFor from this n
IjIn the individual speech frame first occurs to the total number of speech frames that is experienced between last generation.
Except above-described, can also there be other various based on the concrete mode that recurs number of times or incidence, applied environment is depended in the selection of all these modes, for example adopts the wireless communication system of the inventive method to be based on the maximized strategy of voice quality when speech business is provided and also is based on the compromise strategy of power system capacity and voice quality etc.For those skilled in the art, after having read this instructions, it is conspicuous that the mode of all these concrete modes and selection all becomes, and therefore concrete thresholding triggering mode should not constitute the qualification to protection domain of the present invention.
It is worthy of note, after relating to the request of speech encoding rate adjustment above for example transmitting terminal receives, can carry out corresponding speech encoding rate adjustment operation according to this request, but also can be as the downlink mode control module 150A among Fig. 1, in conjunction with other factors (for example network control restriction), whether decision is according to the request executable operations.
Fig. 3 illustrates the treatment scheme according to a preferred embodiment of many rate vocoder of the present invention pattern adaptation method, and this embodiment has realized aforementioned first kind of concrete thresholding triggering mode.As shown in Figure 3, in step 310, receiving end receives a speech frame.Then enter step 320, judge whether the speech encoding rate of the current speech frame that receives mates with the vocoder mode of transmitting terminal request, if coupling then enters step 330, otherwise returns step 310.Because what will determine in the present embodiment is whether the transmitting terminal vocoder mode of asking is suitable, so step 320 is necessary.
In step 330, speech frame is carried out continuous counter, that is, the current count value N of counter is added 1.Enter step 340 subsequently, judge that whether this speech frame is bad frame, if bad frame then enters step 350, otherwise enters step 360.The mode of judging bad frame in the step 340 for example can adopt above-described mode.
In step 350, judge that whether count value N is less than N
Down(i), if the result then enters step 370 for being, otherwise enter step 390.The i here represents the sequence number of pattern of many rate vocoder of transmitting terminal, N
Down(i) thresholding that switches to the vocoder mode of low rate more (promptly (i-1) plants vocoder mode here) of i kind vocoder mode just.
In step 370, transmitting terminal is requested to reduce its vocoder mode, promptly adopts (i-1) to plant vocoder mode.Enter step 390 subsequently, reset counter, that is, and count value N zero setting, and return step 310.
In step 360, judge that whether count value N is greater than N
Up(i), if the result then enters step 380 for being, otherwise return step 310.The i here represents the sequence number of pattern of many rate vocoder of transmitting terminal, N
Up(i) thresholding that switches to the vocoder mode of higher rate (promptly (i+1) plants vocoder mode here) of i kind vocoder mode just.
In step 380, transmitting terminal is requested to improve its vocoder mode, promptly adopts (i+1) to plant vocoder mode, and enters step 390.
Table 1 shows one and has under 4 kinds of vocoder mode downwards corresponding and the tabulation example of handoff threshold upwards.N under every kind of pattern
Down(i) and N
Up(i) concrete value depends on actual applied environment, for example can determine according to the service quality (QoS) of system.In the present embodiment, switch, can make the N under every kind of pattern for avoiding vocoder mode that frequent table tennis takes place
Down(i) all less than N
Up(i).
Table 1
| Be used for frame count thresholding to the switching of higher rate vocoder mode | Be used for the frame count thresholding that switches to low rate vocoder mode more | |
| Vocoder mode 4 | N down(4) | |
| Vocoder mode 3 | N up(3) | N down(3) |
| Vocoder mode 2 | N up(2) | N down(2) |
| Vocoder mode 1 | N up(1) |
Below by Figure 4 and 5 the embodiment that the above-mentioned many rate vocoder pattern of the present invention adaptation method is used is described in a wireless communication system.In these two embodiment, wireless communication system is an enhancement mode PHS system, comprises base station and user terminal, and the mode of employing adaptive multi-rate (AMR) solves the rate allocation of information source coding and chnnel coding, that is, Shi Ji speech encoding rate depends on channel condition.In the embodiment shown in fig. 4, be respectively the speech encoding rate of up (from user terminal to the base station) and descending (from the base station to user terminal) link selection the best, it is adaptive to carry out many rate vocoder pattern in other words respectively, and in the embodiment shown in fig. 5, for further simplifying the adaptive processing of many rate vocoder pattern, the uplink and downlink link adopts unified best voice code rate, carries out adaptive to many rate vocoder pattern unification of uplink downlink in other words.
As shown in Figure 4, in step 410, base station and user terminal establish a communications link with through the Traffic Channel transmit data frames, wherein the base station for example the vocoder mode adaptation parameter shown in following table 2 be sent to user terminal.
Fig. 6 exemplarily shows the data frame format of this Traffic Channel, and it is made up of frame head and the speech data two parts of following thereafter.As shown in Figure 6, in order to support many rate vocoder pattern adapting operation, the frame head of Frame comprises vocoder mode indication and two fields of vocoder mode request, the former is used for representing the vocoder mode of this Frame when voice coding, and the latter is used for representing that transmit leg wishes the used vocoder mode of take over party of this Frame; The error code information (for example CRC check bit) that speech data partly comprises source bits and generates according to part or all of source bits.It is worthy of note that the Frame here can be regarded as alleged speech frame in many rate vocoder adaptation method of describing in the above.
Table 2 exemplarily shows the implication of these two field values.In following table, if pattern indication field value is 0, represent that then current data frame is quiet describer (SID) frame, if mode request field value is 0, then expression request take over party sends quiet describer (SID) frame, if pattern indication field value is 1～4, then represent transmit leg respectively with 4.75,5.90,7.95 and the vocoder mode of 12.2kbps carry out voice coding, if mode request field value is 1～4, then represent transmit leg request take over party respectively with 4.75,5.90,7.95 and the vocoder mode of 12.2kbps carry out voice coding.
Table 2
| The pattern indication | Mode request | Implication |
| 0 | 0 | AMR SID |
| 1 | 1 | AMR 4.75Kbps |
| 2 | 2 | AMR 5.90Kbps |
| 3 | 3 | AMR 7.95Kbps |
| 4 | 4 | AMR 12.2Kbps |
Then enter step 420, the base station is through the up-link receiving data frames, and determine the switching or the adjustment information of user terminal according to its quality, promptly, whether the currently used vocoder mode of user terminal needs direction (when needs switch) of switching and switching etc., definite mode of handover information adopt described above according to of the present invention based on the adaptive method of many rate vocoder pattern of thresholding triggering mode, do not give unnecessary details herein.Behind the handover information of having determined vocoder mode, can draw its value according to the pattern indication field in the Frame that is received through the mode request field of downlink in the Frame that the terminal user sends.
Enter step 430 subsequently, to the user terminal to transmit data frame, wherein, the value that draws in the step 420 is written in the mode request field of the Frame here through downlink in the base station.
Then enter step 440, user terminal is through the downlink receiving data frames, and determine the switching or the adjustment information of base station according to its quality, promptly, whether the currently used vocoder mode in base station needs direction (when needs switch) of switching and switching etc., definite mode of handover information utilize described above according to of the present invention based on the adaptive method of many rate vocoder pattern of thresholding triggering mode, do not give unnecessary details herein.Behind the handover information of having determined vocoder mode, can draw its value according to the pattern indication field in the Frame that is received through the mode request field of up-link in the Frame that the base station sends.
Enter step 450 subsequently, user terminal sends Frame through up-link to the base station, and wherein, the value that draws in the step 440 is written in the mode request field of the Frame here.
In step 460, user terminal and base station are transmitted vocoded data through Traffic Channel to the opposing party, the handover information that its vocoder mode obtains based on step 420 and step 440 respectively.
Above-mentioned steps 420～450 execution that constantly circulates, thus realized the self-adaptation adjustment of vocoder mode.
As shown in Figure 5, in step 510, base station and user terminal establish a communications link with through the Traffic Channel transmit data frames, wherein, the base station for example vocoder mode adaptation parameter shown in top table 2 is sent to user terminal, and Frame also can adopt form shown in Figure 6.
Then enter step 520, the base station is through the up-link receiving data frames, and determine the switching or the adjustment information of himself and user terminal according to its quality, be whether currently used vocoder mode needs the direction (when needs switch) switching and switch, determine mode utilize described above according to of the present invention based on the adaptive method of many rate vocoder pattern of thresholding triggering mode, do not give unnecessary details herein.Behind the handover information of having determined vocoder mode, can draw its value according to the pattern indication field in the Frame that is received through the mode request field of downlink in the Frame that the terminal user sends.
Enter step 530 subsequently, to the user terminal to transmit data frame, wherein, the value that draws in the step 520 is written in the mode request field of the Frame here, and the speed of voice coding is also based on the handover information that obtains in the step 520 through downlink in the base station.
In step 540, user terminal and base station are transmitted vocoded data through Traffic Channel to the opposing party, the handover information that its vocoder mode all obtains based on step 520.
The present invention relatively is suitable for the enhancement mode PHS system that adopts multi-rate speech encoding and decoding and channel coding/decoding to combine, below be example with the PHS system, by Fig. 7 and table 3 base station in above-mentioned steps 410 and 510 sends example from the vocoder mode adaptation parameter to user terminal is described.In this example, realize in the location registers signaling process that is sent in a PHS system of vocoder mode adaptation parameter.
As shown in Figure 7, in step 701, user terminal sends link channel to the base station and sets up request.Then in step 702, this link channel of base station in response is set up request, sends link channel to user terminal and distributes.
In step 703, user terminal sends synchronizing pulse to the base station after receiving the link channel distribution.In step 704, the base station responds to the synchronizing pulse that user terminal sends, and sends synchronizing pulse to user terminal.
After this, in step 705, transmission is provided with Asynchronous Balanced Mode (SABM) to user terminal to the base station after receiving synchronizing pulse, and in step 706, the base station is provided with Asynchronous Balanced Mode according to this and sends unnumbered acknowledge (UA) to user terminal.
Then in step 707, user terminal sends mobile management (MM) position register request according to this unnumbered acknowledge to the base station, and in step 708, the base station sends register information according to this mobile management (MM) position register request to network.
In step 709, user terminal sends wireless radio frequency transmissions management (RT) definition information request to the base station, and in step 710, the base station sends RT definition information response according to this RT definition information request to user terminal.
In step 711 subsequently, user terminal sends the request of RT function to the base station after receiving RT definition information response, and in step 712, the base station sends RT function request response according to this RT function request to user terminal, then in step 713, the base station sends the RT cipher key setting to user terminal.
In step 714, the base station sends the request of MM function to user terminal subsequently, and in step 715, user terminal sends MM function request response according to the request of MM function to the base station.
In step 716, network to base site sends authentication password information subsequently.And in step 717, the base station sends the MM authentication request to terminal after receiving authentication password information, and in step 718, user terminal sends the response of MM authentication request according to the MM authentication request to the base station.In step 719 base station, the base station responds according to authentication password Information Authentication MM authentication request, and sends authentication result information to network.
In step 725, checking is passed through if authentication result information is user terminal identity, then network to base site sends many rate vocoder pattern adaptation parameter, and in step 720, the base station sends the MM location registers to user terminal to be confirmed, and adds above-mentioned many rate vocoder pattern adaptation parameter in this message.
Then in step 721, the base station sends to terminal and cuts off (DISC), and in step 722, user terminal sends UA according to this DISC to the base station.In step 723, the base station receives UA rear line terminal and sends the cut-out of RT wireless channel, and in step 724 terminal, user terminal sends the cut-out of RT wireless channel to the base station and finishes.So far, a location registers signaling process in this PHS system is promptly accused and is finished.
Table 3 exemplarily shows in the above-mentioned steps 720 in the MM position register request acknowledge message that sends and the relevant field of many rate vocoder pattern adaptation parameter, and the implication of these parameters is referring to the description of relevant table 1.As shown in table 3, X byte pad parameter N
Up(1); X+1 byte pad parameter N
Up(2); X+2 byte pad parameter N
Up(3); X+3 byte pad parameter N
Down(2); X+4 byte pad parameter N
Down(3); X+5 byte pad parameter N
Down(4).
Table 3
| Byte | 8 7 6 5 4 3 2 1 |
| X | N up(1) |
| X+1 | N up(2) |
| X+2 | N up(3) |
| X+3 | N down(2) |
| X+4 | N down(3) |
| X+5 | N down(4) |
After reading above-mentioned disclosure content, other modification it will be apparent to one skilled in the art that to be conspicuous.This modification may relate in wireless communication system and the component unit thereof well-known features, and these features can replace the feature described here or use in the mode of adding.
In this instructions and claims, appear at before the unit word " " not the situation with a plurality of this unit foreclose.And word " comprises " situation that not eliminating also has other unit or step to exist except that institute's column unit or step.
Claims (6)
1. a method of determining the speech encoding rate of rate vocoder more than is characterized in that, comprises the following step:
(1) be speech frame with this one of them speech encoding rate of many rate vocoder with speech signal coding; And
(2) according to the continuous occurrence number of every kind of quality type of the described speech frame that receives, generate the adjustment information of described speech signal coding speed,
Described speech frame has comprised frame and two kinds of quality types of bad frame, and judge that according to the error code information that described speech frame comprises it has been frame or bad frame, the generating mode of described adjustment information is, if the described speech frame that receives continuously for the quantity of good frame greater than one first handoff threshold, then generate the indication that increases described speech encoding rate, if a bad frame occurs in less than the continuous described speech frame of one second handoff threshold in the quantity that receives, then generate the indication that reduces described speech encoding rate, otherwise, generate the indication that described speech encoding rate is remained unchanged.
2. the method for claim 1, wherein described error code information is the cyclic redundancy check bits that generates according at least a portion information bit in the described speech frame.
3. method of in a wireless communication system, determining speech encoding rate, this wireless communication system comprises one first communicator and a second communication device, it is characterized in that, comprises following steps:
(1) at the described first communicator place, be speech frame with speech signal coding with a speech encoding rate;
(2) described speech frame is sent to described second communication device from described first communicator; And
(3) the continuous occurrence number of every kind of quality type of the described speech frame that receives according to described second communication device generates the adjustment information of described speech signal coding speed,
Wherein, described speech frame has comprised frame and two kinds of quality types of bad frame, and judge that according to the error code information that described speech frame comprises it has been frame or bad frame, the generating mode of described adjustment information is, if the described speech frame that described second communication device receives continuously for the quantity of good frame greater than one first handoff threshold, then generate the indication that increases described speech encoding rate, if a bad frame occurs in less than the continuous described speech frame of one second handoff threshold in quantity that described second communication device receives, then generate the indication that reduces described speech encoding rate, otherwise, generate the indication that described speech encoding rate is remained unchanged.
4. method as claimed in claim 3, wherein, described error code information is the cyclic redundancy check bits that generates according at least a portion information bit in the described speech frame.
5. method of in a wireless communication system, determining speech encoding rate, this wireless communication system comprises one first communicator and a second communication device, it is characterized in that, comprises the following step:
(1) described first communicator and second communication device are speech frame with first and second speech encoding rates with speech signal coding respectively;
(2) will send to described second communication device from described first communicator according to the speech frame of described first speech signal coding; And
(3) the continuous occurrence number of every kind of quality type of the described speech frame according to described first speech signal coding that receives according to described second communication device generates the adjustment information of the described first and second speech signal coding speed,
Wherein, described speech frame has comprised frame and two kinds of quality types of bad frame, and judge that according to the error code information that described speech frame comprises it has been frame or bad frame, the generating mode of described adjustment information is, if the quantity that the described speech frame according to described first speech signal coding that described second communication device receives is good frame continuously is greater than one first handoff threshold, then generate the indication that increases described first and second speech encoding rates, if a bad frame occurs in less than the continuous speech frame of one second handoff threshold in quantity that described second communication device receives, then generate the indication that reduces described first and second speech encoding rates, otherwise, generate the indication that described first and second speech encoding rates are remained unchanged.
6. method as claimed in claim 5, wherein, described error code information is the cyclic redundancy check bits that generates according at least a portion information bit in the described speech frame.
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| CN106297827A (en) * | 2015-06-02 | 2017-01-04 | 中兴通讯股份有限公司 | Detection method that voice encryption is made mistakes and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101409597B (en) * | 2007-10-12 | 2011-04-13 | 华为技术有限公司 | Talking method and apparatus |
| CN101425836B (en) * | 2007-10-29 | 2013-06-05 | 华为技术有限公司 | Encoding rate controlling method and device |
| KR101432814B1 (en) * | 2007-11-30 | 2014-08-28 | 삼성전자주식회사 | Rate adapted video data transmission method using end-to-end channel status sensing over Wireless Network |
| CN101355816B (en) * | 2008-09-10 | 2011-11-30 | 中兴通讯股份有限公司 | Method and apparatus for negotiating vocoder mode in CDMA system |
| CN101959255B (en) * | 2009-07-16 | 2013-06-05 | 中兴通讯股份有限公司 | Method, system and device for regulating rate of voice coder |
| CN102104448B (en) * | 2011-03-23 | 2013-04-24 | 华为技术有限公司 | Method and device for detecting code rate of speech frame |
| EP3448085A4 (en) * | 2016-05-13 | 2019-05-01 | Huawei Technologies Co., Ltd. | Method and device for adjusting coding rate |
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| CN1360805A (en) * | 1999-07-05 | 2002-07-24 | 诺基亚公司 | Method for coding mode selection |
| CN1625849A (en) * | 2002-03-21 | 2005-06-08 | 艾利森电话股份有限公司 | Forward link supervision for packet data users in a wireless communication network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1360805A (en) * | 1999-07-05 | 2002-07-24 | 诺基亚公司 | Method for coding mode selection |
| CN1625849A (en) * | 2002-03-21 | 2005-06-08 | 艾利森电话股份有限公司 | Forward link supervision for packet data users in a wireless communication network |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297827A (en) * | 2015-06-02 | 2017-01-04 | 中兴通讯股份有限公司 | Detection method that voice encryption is made mistakes and device |
| CN106297827B (en) * | 2015-06-02 | 2020-07-10 | 中兴通讯股份有限公司 | Method and device for detecting voice encryption errors |
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