CN101651935A - Method and system for optimizing tonal quality of coloring ring back tone - Google Patents
Method and system for optimizing tonal quality of coloring ring back tone Download PDFInfo
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- CN101651935A CN101651935A CN200910092078A CN200910092078A CN101651935A CN 101651935 A CN101651935 A CN 101651935A CN 200910092078 A CN200910092078 A CN 200910092078A CN 200910092078 A CN200910092078 A CN 200910092078A CN 101651935 A CN101651935 A CN 101651935A
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Abstract
The invention discloses a method for optimizing the tonal quality of a coloring ring back tone. The method comprises the following steps that: the calling connection between a calling terminal and a called terminal is established, and when the calling terminal is in a waiting state, a switching network transmits the desired coloring ring back tone data to a base station; and the base station closes at least one of a noise control function, a voice activation detection (VAD) function and an echo cancelling function and encodes the received coloring ring back tone data, and then transmits the data to the calling terminal. The invention further provides a system for optimizing the tonal quality of the coloring ring back tone. The tonal quality of the coloring ring back tone can be improved and the experience of the user can be also improved based on the method and the system.
Description
Technical field
The present invention relates to the CRBT sound technology of wireless communication field, be meant a kind of method and system of optimizing tonal quality of coloring ring back tone especially.
Background technology
The CRBT sound be appeared in recent years move or landline telephone in value-added service, allow the user to replace traditional " pouting ... pout ... " call waiting tone with audio frequency such as the music that more is rich in individual character, messages.
Music and CD (CD that telephone system is play, Compact Disc) or dynamic image expert compression standard audio frequency aspect 3 (MP3, Moving Picture Experts Group Audio Layer III) music of form is compared, and its tonequality has certain gap.Because the sample rate of CD form music is 44100Hz, dual track, 16 quantifications, total transmission rate, be that code check is 44100 * 2 * 16/1000=1411.2kbps; For the music of the MP3 format of 11: 1 compression ratios, its code check is 1411.2/11 ≈ 128kbps.And the pulse code modulation in the telephone system (PCM, Pulse Code Modulation) sample rate is 8000Hz, 8 quantifications, and promptly Circuit-switched transmission rate has only 64kbps, and the speed of wireless transmission is lower.
At present, code division multiple access (CDMA, Code Division Multiple Access) widely used code decode algorithm is enhancing variable bit rate encoding and decoding (EVRC in the system, Enhanced Variable Rate Codec), can carry out variable rate encoding according to speech energy, its maximum data transmission rate is 8.55kbps, and minimum only is 0.8kbps, as seen the music that present cdma system is play, its tonequality is well below the music of CD or MP3 format.Cdma system is the same with normal speech to the processing of CRBT sound: carry out variable rate coding, just average transmission rate 8.55kpbs does not reach; And generally all can open noise suppressed and echo cancelltion in the cdma system, this has than macrolesion tonal quality of coloring ring back tone, causes the tonal quality of coloring ring back tone in the cdma system very low thus.
The purpose of releasing bell sound business is to wait the impression of biding one's time in order to improve the calling subscriber, and tonequality is bad then can run counter to desire, and brings bad Experience Degree to the user.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system of optimizing tonal quality of coloring ring back tone, can improve the tonequality of CRBT sound in the cdma system, improves user's Experience Degree.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of method of optimizing tonal quality of coloring ring back tone, this method comprises:
The calling of calling terminal and terminal called is connected foundation, and described calling terminal is when being in wait state, and switching network sends to the base station with required CRBT sound data;
Described base station is closed noise control function, voice activation and is detected at least a in vad function and the echo cancel function, and the CRBT sound data that receives is encoded, and sends to described calling terminal.
Wherein, described calling of setting up calling terminal and terminal called is connected, and is specially;
Described base station is set up described calling with the call message of carrying service option SO that switching network sends according to described calling terminal and is connected;
At least carry the user profile and the audio code decode algorithm of described terminal called among the described SO.
Wherein, the switch that contains playback platform or integrated playback platform in the described switching network at least;
Described playback platform is used to store the corresponding relation of the bell sound business of the user profile of described terminal called and its customization.
This method further comprises: described switching network is according to the user profile and the described corresponding relation of described terminal called, and the CRBT sound data that described terminal called is customized sends to the base station.
The base station is closed noise control function, voice activation and is detected at least a in vad function and the echo cancel function, is specially:
In described base station in advance in noise control function, vad function and the echo cancel function state value of the state parameter of at least a correspondence be set to close;
When described calling terminal was in wait state, being the closing state parameter according to described state value closed the noise control function of correspondence and/or vad function and/or echo cancel function.
Encoding to the CRBT sound data in described base station, is specially:
Encode to described CRBT sound data according to described audio code decode algorithm in described base station.
After described calling terminal received the CRBT sound data, this method further comprised: described calling terminal is decoded and the coloring ring back tone playing sound to described CRBT sound data according to described audio code decode algorithm.
After described calling terminal and terminal called entered conversation state, this method further comprised:
Vad function is opened in described base station, and the state value of the state parameter of noise control function and echo cancel function correspondence during according to the conversation state that sets in advance, open noise control function and/or echo cancel function or keep the closed condition of described noise control function and/or echo cancel function.
The present invention also provides a kind of system that optimizes tonal quality of coloring ring back tone, and this system comprises: calling terminal, terminal called, base station and switching network network element, wherein:
Described calling terminal is connected with described base station; Described base station is connected with described switching network network element; Described switching network network element is connected with described terminal called;
The calling of described calling terminal and terminal called is connected foundation, and described calling terminal is when being in wait state, and described switching network network element is used for required CRBT sound data is sent to described base station;
Described base station is used for closing at least a of noise control function, voice activation detection vad function and echo cancel function, and the CRBT sound data that receives is encoded, and sends to described calling terminal;
Described calling terminal is used to receive the CRBT sound data behind the described coding.
Wherein, described base station is further used for, and the state value of the state parameter of at least a correspondence is set to close in noise control function, vad function and the echo cancel function in advance; When described calling terminal was in wait state, being the closing state parameter according to described state value closed the noise control function of correspondence and/or vad function and/or echo cancel function.
The present invention optimizes the scheme of tonal quality of coloring ring back tone, by in the base station, setting in advance the state parameter that tonal quality of coloring ring back tone is caused noise control function, voice activation measuring ability and the echo cancel function correspondence of damage, in CRBT sound playing process, the state value (state value of at least a function is for closing) of the state parameter of the described three kinds of function correspondences of foundation, to above-mentioned three kinds of operations that function executing is closed, reduce damage with this to tonal quality of coloring ring back tone, thereby improved tonal quality of coloring ring back tone, also improved user's Experience Degree.
Description of drawings
Fig. 1 optimizes the method flow schematic diagram of tonal quality of coloring ring back tone for the present invention;
Fig. 2 optimizes the flow chart of tonal quality of coloring ring back tone method one embodiment for the present invention;
Fig. 3 optimizes the system configuration schematic diagram of tonal quality of coloring ring back tone for the present invention.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
The present invention is by in CRBT sound playing process, close the influential noise control of tonal quality of coloring ring back tone, voice activation are detected functions such as (VAD, Voice Activation Detection) and echo cancelltion, to improve the tonequality of CRBT sound, detailed process comprises as shown in Figure 1:
Below by specific embodiment the solution of the present invention is described, as shown in Figure 2, comprises:
The present invention has given tacit consent to terminal called customization bell sound business, when the calling of calling terminal and terminal called be connected set up finish after, and calling terminal is when being in wait state, switching network is play the CRBT sound of terminal called customization to calling terminal.
At first, switching network sends to the base station with the CRBT sound data of terminal called customization, sends to calling terminal again by the base station, and described base station is for providing serving base station to calling terminal.
The nucleus equipment of switching network described in the present invention is the playback platform, be mainly used in the corresponding relation of the bell sound business of the storage user profile of terminal called and its customization, can obtain the CRBT sound of terminal called customization according to this corresponding relation, the CRBT sound data of playback platform storage is the CRBT sound data etc. of 64kbpsde PCM form as total bitrate; When the calling terminal initiation is connected with the calling of terminal called, calling terminal sends a call message to the base station, wherein carry a service option (SO, Service Option), carried the user profile of terminal called and the audio code decode algorithm of consulting among this SO at least; Finish back (while calling terminal and terminal called have carried out negotiation, promptly adopted the audio code decode algorithm that carries among the SO audio code decode algorithm) when call out to connect setting up, switching network finds the bell sound business of this customization according to the user profile of terminal called, and the CRBT sound data is sent to the base station.Wherein, the playback platform can independent part be deployed on the server, also can be integrated in the switch.
In order to improve the tonequality of CRBT sound, will cause noise control function, vad function and the echo cancel function of damage to close among the present invention to tonal quality of coloring ring back tone.
In cdma system, noise control function has bigger damage to the tonequality of CRBT sound, after this function is closed, can obviously promote the tonequality of CRBT sound.
Can carry out full-rate codes to the CRBT sound after closing vad function, this full rate is meant the highest code check of the audio code decode algorithm that terminal called and calling terminal are consulted, as in the cdma system, adopting the EVRC algorithm, the highest code rate (code check) of this algorithm is 8.55kbps, and minimum code rate is 0.8kbps; If the unlatching vad function, then code rate does not reach the highest code rate of EVRC algorithm, can reduce tonal quality of coloring ring back tone; If close vad function, just can use the highest code rate of EVRC algorithm that the CRBT sound is encoded, so can farthest guarantee tonal quality of coloring ring back tone;
For echo cancel function, generally speaking, can the echogenicity phenomenon in the CRBT sound stage of playing, it is less to the lifting of tonal quality of coloring ring back tone therefore to close echo cancel function, but the processing that source of sound (CRBT sound data) is made is few more, and is just more little to the damage of tonequality.
Among the present invention, can close above-mentioned three kinds of functions simultaneously, this kind mode can reach best effect for promoting tonal quality of coloring ring back tone; Can certainly only close one or both functions wherein.
Concrete, the state parameter of above-mentioned three kinds of function correspondences can be set in the base station in advance, this parameter comprises opening and closing two states value.It is pointed out that the corresponding two kinds of communication processs of state parameter, the one, finish being connected to set up of calling terminal and terminal called, and calling terminal is in wait state, be also not response conversation this time of terminal called, this stage is the broadcast stage of CRBT sound; The one,, calling terminal and terminal called are in conversation state, are that calling terminal and terminal called are conversed.
In the broadcast stage of CRBT sound, preferably, the state value of above-mentioned three kinds of function correspondences all can be set to close, so in the broadcast stage of CRBT sound, just the damage of CRBT sound farthest can be reduced; In conversation state, preferably, the state value of vad function correspondence is set to open, as required can noise control function, the state value of echo cancel function correspondence is set to open or close.
Play the stage at the CRBT sound, calling terminal needs decode to the CRBT sound according to the audio code decode algorithm of consulting after receiving CRBT sound data behind the coding that the base station sends, plays then; Adopt the optimization method of CRBT sound of the present invention, calling terminal can receive acoustical quality CRBT sound preferably.
State value setting according to three kinds of function correspondences of conversation state process in the step 202, the base station is when calling terminal and terminal called enter conversation state, open or close above-mentioned three kinds of functions, operate accordingly the voice data in the communication process is carried out above-mentioned three kinds of functions.
In order to realize the optimization method of above-mentioned tonal quality of coloring ring back tone, the present invention also provides a kind of optimization system of tonal quality of coloring ring back tone, as shown in Figure 3, comprising: calling terminal 10, terminal called 20, switching network network element 30 and base station 40, wherein:
Calling terminal 10 is connected with base station 40; Base station 40 is connected with switching network network element 30; Switching network network element 30 is connected with terminal called 20;
The calling of calling terminal 10 and terminal called 20 is connected foundation, and calling terminal 10 is when being in wait state, and switching network network element 30 is used for required CRBT sound data is sent to base station 40;
Calling terminal 10 is used for the CRBT sound data behind the received code.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1, a kind of method of optimizing tonal quality of coloring ring back tone is characterized in that, this method comprises:
The calling of calling terminal and terminal called is connected foundation, and described calling terminal is when being in wait state, and switching network sends to the base station with required CRBT sound data;
Described base station is closed noise control function, voice activation and is detected at least a in vad function and the echo cancel function, and the CRBT sound data that receives is encoded, and sends to described calling terminal.
According to the method for the described optimization tonal quality of coloring ring back tone of claim 1, it is characterized in that 2, described calling of setting up calling terminal and terminal called is connected, and is specially;
Described base station is set up described calling with the call message of carrying service option SO that switching network sends according to described calling terminal and is connected;
At least carry the user profile and the audio code decode algorithm of described terminal called among the described SO.
3, according to the method for claim 1 or 2 described optimization tonal quality of coloring ring back tone, it is characterized in that, contain the switch of playback platform or integrated playback platform in the described switching network at least;
Described playback platform is used to store the corresponding relation of the bell sound business of the user profile of described terminal called and its customization.
4, according to the method for the described optimization tonal quality of coloring ring back tone of claim 3, it is characterized in that, this method further comprises: described switching network is according to the user profile and the described corresponding relation of described terminal called, and the CRBT sound data that described terminal called is customized sends to the base station.
According to the method for the described optimization tonal quality of coloring ring back tone of claim 1, it is characterized in that 5, the base station is closed noise control function, voice activation and detected at least a in vad function and the echo cancel function, is specially:
In described base station in advance in noise control function, vad function and the echo cancel function state value of the state parameter of at least a correspondence be set to close;
When described calling terminal was in wait state, being the closing state parameter according to described state value closed the noise control function of correspondence and/or vad function and/or echo cancel function.
According to the method for claim 1 or 2 described optimization tonal quality of coloring ring back tone, it is characterized in that 6, encoding to the CRBT sound data in described base station, is specially:
Encode to described CRBT sound data according to described audio code decode algorithm in described base station.
7, according to the method for the described optimization tonal quality of coloring ring back tone of claim 6, it is characterized in that, after described calling terminal received the CRBT sound data, this method further comprised: described calling terminal is decoded and the coloring ring back tone playing sound to described CRBT sound data according to described audio code decode algorithm.
According to the method for claim 1 or 7 arbitrary described optimization tonal quality of coloring ring back tone, it is characterized in that 8, after described calling terminal and terminal called entered conversation state, this method further comprised:
Vad function is opened in described base station, and the state value of the state parameter of noise control function and echo cancel function correspondence during according to the conversation state that sets in advance, open noise control function and/or echo cancel function or keep the closed condition of described noise control function and/or echo cancel function.
9, a kind of system that optimizes tonal quality of coloring ring back tone is characterized in that, this system comprises: calling terminal, terminal called, base station and switching network network element, wherein:
Described calling terminal is connected with described base station; Described base station is connected with described switching network network element; Described switching network network element is connected with described terminal called;
The calling of described calling terminal and terminal called is connected foundation, and described calling terminal is when being in wait state, and described switching network network element is used for required CRBT sound data is sent to described base station;
Described base station is used for closing at least a of noise control function, voice activation detection vad function and echo cancel function, and the CRBT sound data that receives is encoded, and sends to described calling terminal;
Described calling terminal is used to receive the CRBT sound data behind the described coding.
10, according to the system of the described optimization tonal quality of coloring ring back tone of claim 9, it is characterized in that,
Described base station is further used for, and the state value of the state parameter of at least a correspondence is set to close in noise control function, vad function and the echo cancel function in advance; When described calling terminal was in wait state, being the closing state parameter according to described state value closed the noise control function of correspondence and/or vad function and/or echo cancel function.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103262517A (en) * | 2010-07-09 | 2013-08-21 | 谷歌公司 | Method of indicating presence of transient noise in a call and apparatus thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103262517A (en) * | 2010-07-09 | 2013-08-21 | 谷歌公司 | Method of indicating presence of transient noise in a call and apparatus thereof |
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Application publication date: 20100217 |