CN101179535B - Dual-tone multi-frequency signal processing method and system - Google Patents
Dual-tone multi-frequency signal processing method and system Download PDFInfo
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- CN101179535B CN101179535B CN2006101568135A CN200610156813A CN101179535B CN 101179535 B CN101179535 B CN 101179535B CN 2006101568135 A CN2006101568135 A CN 2006101568135A CN 200610156813 A CN200610156813 A CN 200610156813A CN 101179535 B CN101179535 B CN 101179535B
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Abstract
The invention discloses a method and a system used for processing a dual-tone multi-frequency signal. The method includes steps: a band signaling is sent according to a calling signaling; the band signaling is resolved; the dual-tone multi-frequency signal transmitted in an in-band method or the dual-tone multi-frequency signal transmitted in a REC2833 way is processed according to a result of the analysis. In the invention, the dual-tone multi-frequency signal does not require a real-time detection by the media gateway, and thus a spending of the system is reduced largely, and a processing ability of the media gateway is improved.
Description
Technical field
The present invention relates to communication technique field, relate in particular to the method and system that a kind of touch-tone signal is handled.
Background technology
DTMF (Double Tone MulitiFrequency, dual-tone multifrequency) is as a kind of technology that realizes the transmission of telephone number fast and reliable, and it has very strong antijamming capability and higher transmission speed, therefore can be widely used in the telephonic communication system.At present, it is used for the voice-frequency dialing of phone more, also can be used for realizing the remote transmission of information such as various data flow and voice in addition in data communication system widely.
DTMF represents digital signal to realize a kind of coding techniques of its function with two specific single audio frequency composite signals.The frequency difference of two single audio frequency, the digital signal of representative or the function of realization are also different.The telephone set of using the DTMF technology has 16 buttons usually, and 10 numerical keys 0～9 and 6 function key *, #, A, B, C, D are wherein arranged.According to combinatorial principle, 8 kinds of different single audio signals are generally arranged, therefore adoptable frequency also has 8 kinds, so be referred to as multifrequency; Adopt any 2 kinds from 8 kinds of frequencies to make up and encode because of its again, so be referred to as the coding techniques of " getting 2 in 8 " again.
According to the suggestion of CCITT, the multiple frequency of Cai Yonging is following 8 kinds in the world: 697Hz, 770Hz, 852Hz, 941Hz, 1209Hz, 1336Hz, 1477Hz and 1633Hz.16 kinds of different combinations be can form with these 8 kinds of frequencies, thereby 16 kinds of different numerals or function key represented, as described in Table 1:
Table 1
| 697? | 1? | 2? | 3? | A? |
| 770? | 4? | 5? | 6? | B? |
| 852? | 7? | 8? | 9? | C? |
| 941? | *? | 0? | #? | D? |
The transmission means of dtmf signal generally includes: the RFC2833 mode is transmitted, and promptly uses the RFC2833 agreement that dtmf signal is converted to the RFC2833 protocol package and transmits in RTP (real time transport protocol); Another kind is the in-band method transmission.And the conversion between the interior dtmf signal of RFC2833 dtmf signal and band is generally by media gateway realization.
As shown in Figure 1, in an existing calling, the dtmf signal that one end transmits for the RFC2833 mode, one end is the dtmf signal of in-band method transmission, if when being input as the dtmf signal that the RFC2833 mode transmits, then select directly to abandon the dtmf signal that the RFC2833 mode is transmitted, or the dtmf signal that the RFC2833 mode is transmitted is converted to the dtmf signal that in-band method transmits, transfer out by an other end by media gateway; And if when being input as the DTMF of in-band method transmission, media gateway selects to abandon the dtmf signal of this in-band method transmission, or select the dtmf signal of in-band method transmission is converted to the dtmf signal that the RFC2833 mode is transmitted, transfer out by the other end, perhaps gateway can also be selected the dtmf signal of in-band method transmission is used as voice messaging, is attached in the voice signal to transfer out.When being input as the DTMF of in-band method transmission, if select preceding two kinds of methods (abandoning or be converted to the RFC2833 mode), all need dtmf signal in being with is detected in real time, the gateway expense is bigger.And in fact, use dtmf signal for when can in link, having, call signaling generally all can be known in advance, for example in IN service, if the service needed user imports correlation number, can put prompt tone to the user in advance.
Select and need detect in real time when media gateway, then need gateway to analyze the speech of all processes, media gateway does not have the time of dtmf signal will detect in major part yet like this, thereby makes overhead very big, causes unnecessary waste;
Dtmf signal in media gateway selects not detect band is directly gone out it according to speech transmissions, then may lose the information of necessity, makes error of transmission.
Summary of the invention
The purpose of the embodiment of the invention provides the method and system that a kind of touch-tone signal is handled, and makes media gateway when dtmf signal is handled, and reduces the overhead that dtmf signal is detected in real time.
The method that the embodiment of the invention provides a kind of touch-tone signal to handle, this method may further comprise the steps:
Send out-of-band signalling according to call signaling;
Resolve out-of-band signalling;
Handle according to the touch-tone signal that analysis result transmits the touch-tone signal or the RFC2833 mode of in-band method transmission.
The system that the embodiment of the invention also provides a kind of touch-tone signal to handle comprises Media Gateway Controller and media gateway;
Media Gateway Controller is used to send out-of-band signalling to media gateway, and the touch-tone signal that the out-of-band signalling that media gateway receives by parsing transmits the touch-tone signal or the RFC2833 mode of in-band method transmission is handled.
The method and system that the embodiment of the invention proposes is that Media Gateway Controller sends out-of-band signalling according to call signaling to media gateway, thus the processing of the dtmf signal that the control media gateway is transmitted the dtmf signal and the RFC2833 mode of in-band method transmission.When the user sends dtmf signal, indicating media gateway detects dtmf signal and carries out corresponding conversion, and have the time of dtmf signal not detect whether the dtmf signal transmission is not arranged on the speech channel, thereby saved expense, increase the disposal ability of gateway in major part.
Description of drawings
Fig. 1 is the schematic diagram of prior art dtmf signal treatment system;
The schematic diagram that Fig. 2 handles for embodiment of the invention dtmf signal.
Embodiment
For ease of the present invention is further understood, now describe the present invention in conjunction with the accompanying drawings.
Consult shown in Figure 2, one end of a calling is RTP (real time transport protocol) bearing mode and wherein has the dtmf signal that transmits according to the RFC2833 mode, and the other end is with the in-band method transmitting DTMF signals, Media Gateway Controller sends out-of-band signalling according to call signaling to media gateway, the dtmf signal that dtmf signal or RFC2833 mode were transmitted in when, how indicating media gateway was handled and be with.Wherein, above-mentioned out-of-band signalling refers to not the signaling content transmitted with speech (data) on same channels.In the present embodiment, Media Gateway Controller is given media gateway by the out-of-band signalling that issues the H.248 bag that meets agreement grammer H.248, and media gateway is by doing respective handling to bag H.248 after resolving.
H.248 wrap dtran in the present embodiment, comprise two attribute items, 2833 to Inband and Inband to2833.
Attribute item 2833 to Inband, indicate the mode of the dtmf signal that processing RF C2833 mode transmits, its Property Name is 2833 to Inband control, is Property ID 2833 to Inband (0x?), the value that Property ID may occur has following two kinds:
" discard " (0x0001), expression abandons the dtmf signal that transmits according to the RFC2833 mode among this RTP, promptly when the value of attribute " 2833 to Inband " is " discard ", the dtmf signal that an end transmits in the RFC2833 mode will be left in the basket, and not transmit in the other end;
" traninband " (0x0002), expression is converted to the dtmf signal that transmits according to the RFC2833 mode among the RTP dtmf signal of in-band method transmission, promptly when the value of attribute " 2833 to Inband " is " traninband ", the dtmf signal that transmits according to the RFC2833 mode among the end RTP is transformed into the other end transmits with the dtmf signal that in-band method transmits.
Generally the default value of this attribute item be " traninband " (0x0002).
Attribute item Inband to 2833 indicates the mode of the dtmf signal of handling the in-band method transmission, and its Property Name is Inband to 2833 control, is Property ID Inband to 2833 (0x?), the value that Property ID may occur has following three kinds:
" discard " (0x0001), expression detects the dtmf signal of an end with the in-band method transmission, abandon after detecting, in the other end, do not transmit, promptly when the value of attribute item " Inband to 2833 " is " discard ", media gateway abandons detected dtmf signal with the in-band method transmission, and this signal is not transmitted in the other end;
" traninband " (0x0002), expression detects or does not detect the dtmf signal of an end with the in-band method transmission, this signal is transmitted at the other end as the mandarin tone signal, promptly when the value of attribute item " Inband to 2833 " was " traninband ", media gateway was transmitted as common speech the dtmf signal of an end with the in-band method transmission at the other end;
" tranas2833 " (0x0003), expression detects the dtmf signal of an end with the in-band method transmission, and is converted into the dtmf signal that the RFC2833 mode transmits and is transferred to the other end; When the value of attribute item " Inbandto 2833 " was " tranas2833 ", media gateway detected the dtmf signal with the in-band method transmission, and in the mode of the other end according to RFC2833 it was sent out.
Generally the default value of this attribute item be " traninband " (0x0002).
Still given Media Gateway Controller with the controlled function that the RFC2833 mode is transmitted with DTMF with in-band method among the present invention, comparatively speaking, Media Gateway Controller can obtain more information according to call signaling and go to understand when not that needs carry out the processing of DTMF, when need to begin to monitor the transmission of DTMF, so just can control media gateway and in unnecessary, close measuring ability for DTMF, reduce expense, increase disposal ability.
Accordingly, the system that the present invention also provides a kind of touch-tone signal to handle, this system comprises Media Gateway Controller and media gateway, and Media Gateway Controller sends out-of-band signalling according to call signaling to media gateway and H.248 wraps dtran, thereby the control media gateway is to the processing of dtmf signal.
Media gateway is made different processing according to the attribute item 2833 to Inband that H.248 wrap dtran with the different value of Inband to 2833.
For the different value of attribute item 2833 to Inband, the processing mode of media gateway comprises: abandon the dtmf signal that transmits in the RFC2833 mode among the RTP; The dtmf signal that the dtmf signal that transmits according to the RFC2833 mode among the one end RTP is converted to the in-band method transmission transmits at the other end.
For the different value of attribute item Inband to 2833, the processing mode of media gateway comprises: detect the dtmf signal of an end with the in-band method transmission, abandon after detecting, this dtmf signal no longer appears in the other end; Detect or do not detect the dtmf signal of in-band method transmission, and with this signal as common voice signal transmission; Detect the dtmf signal of an end, and be converted into the dtmf signal that the RFC2833 mode transmits and transmit at the other end with in-band method transmission.
In order to restriction protection scope of the present invention, protection scope of the present invention is not as the criterion with the scope of claim above specific embodiment.
Claims (6)
1. the method that touch-tone signal is handled is characterized in that, said method comprising the steps of:
The out-of-band signalling that media gateway receiving media gateway controller sends according to call signaling, wherein, described out-of-band signalling is used to indicate described media gateway when, how to handle the touch-tone signal of in-band method transmission or the touch-tone signal that the RFC2833 mode is transmitted, wherein, described out-of-band signalling is to meet the H.248 H.248 bag of agreement grammer;
Resolve the described H.248 attribute item of bag;
Handle according to the touch-tone signal that analysis result transmits the touch-tone signal or the RFC2833 mode of in-band method transmission, be specially:
The touch-tone signal that described RFC2833 mode is transmitted converts the touch-tone signal of described in-band method transmission to or abandons the touch-tone signal that described RFC2833 mode is transmitted; Perhaps,
Convert the touch-tone signal of described in-band method transmission to the touch-tone signal that described RFC2833 mode transmits or the touch-tone signal that abandons described in-band method transmission; Perhaps,
The touch-tone signal of described in-band method transmission is transferred out as common speech.
2. the method for handling according to the described touch-tone signal of claim 1, it is characterized in that: describedly H.248 comprise two attribute items: 2833to Inband and Inband to 2833, wherein, described 2833to Inband indicates the mode of the touch-tone signal that processing RF C2833 mode transmits, and described Inband to 2833 indicates the mode of the touch-tone signal of handling the in-band method transmission.
3. the system that touch-tone signal is handled is characterized in that: comprise Media Gateway Controller and media gateway;
Media Gateway Controller is used for sending out-of-band signalling to media gateway according to call signaling, wherein, described out-of-band signalling is used to indicate described media gateway when, how to handle the touch-tone signal of in-band method transmission or the touch-tone signal that the RFC2833 mode is transmitted;
The touch-tone signal that the out-of-band signalling that media gateway receives by parsing transmits the touch-tone signal or the RFC2833 mode of in-band method transmission is handled.
4. according to the system of the described touch-tone signal processing of claim 3, it is characterized in that: the touch-tone signal that the attribute item that H.248 media gateway wraps by parsing transmits described RFC2833 mode converts the touch-tone signal of described in-band method transmission to or abandons the touch-tone signal that described RFC2833 mode is transmitted.
5. the system that handles according to the described touch-tone signal of claim 3, it is characterized in that: the attribute item of bag converts the touch-tone signal that described in-band method transmits to touch-tone signal that described RFC2833 mode is transmitted to media gateway by resolving H.248, perhaps abandons the touch-tone signal of described in-band method transmission.
6. according to the system of the described touch-tone signal processing of claim 3, it is characterized in that: the attribute item of bag transfers out the touch-tone signal that described in-band method transmits media gateway as common speech by resolving H.248.
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| CN101336002B (en) * | 2008-07-29 | 2011-11-30 | 中兴通讯股份有限公司 | Method and system for dual-tone multi-frequency signal parameter negotiation between media gateways |
| CN102055516B (en) * | 2009-11-09 | 2014-12-17 | 中兴通讯股份有限公司 | DTMF (dual-tone multifrequency) sound transferring method and device |
| CN102255793B (en) * | 2011-03-21 | 2014-10-29 | 中兴通讯股份有限公司 | Double tone multi-frequency processing method and device |
| CN107273091B (en) * | 2016-04-08 | 2020-11-10 | 佛山市顺德区顺达电脑厂有限公司 | System and method for issuing non-in-band data format instruction in-band data environment |
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| EP1077001A2 (en) * | 1998-11-24 | 2001-02-21 | Hughes Electronics Corporation | Improved in-call dtmf transport for geostationary mobile satellite communication system |
| CN1491019A (en) * | 2002-10-14 | 2004-04-21 | 华为技术有限公司 | Controller and method for mobile communication system apparatus by telephone terminal |
| CN1845574A (en) * | 2005-04-06 | 2006-10-11 | 华为技术有限公司 | Self-adaptive in-band and out-of-band number-receiving method for dual-tone multifrequency digital signal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1077001A2 (en) * | 1998-11-24 | 2001-02-21 | Hughes Electronics Corporation | Improved in-call dtmf transport for geostationary mobile satellite communication system |
| CN1491019A (en) * | 2002-10-14 | 2004-04-21 | 华为技术有限公司 | Controller and method for mobile communication system apparatus by telephone terminal |
| CN1845574A (en) * | 2005-04-06 | 2006-10-11 | 华为技术有限公司 | Self-adaptive in-band and out-of-band number-receiving method for dual-tone multifrequency digital signal |
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