WO2012126310A1

WO2012126310A1 - Method and device for processing double tone multi-frequency

Info

Publication number: WO2012126310A1
Application number: PCT/CN2012/071625
Authority: WO
Inventors: 陈军成; 陈健
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-03-21
Filing date: 2012-02-24
Publication date: 2012-09-27
Also published as: CN102255793B; CN102255793A

Abstract

Disclosed are a method and device for processing Double Tone Multi-Frequency (DTMF), so as to improve accuracy and success rate for processing DTMF. The method comprises: receiving an event message of DTMF currently to be processed, and determining an event type of the event message; setting, according to the event type of the event message, a processing status of the DTMF currently to be processed; and processing, according to the processing status of the DTMF currently to be processed, the DTMF currently to be processed. By use of the technical solution of the present invention, the accuracy and success rate for processing the DTMF are improved.

Description

Method and device for processing dual-tone multi-frequency

The present invention relates to the field of communications, and in particular, to a method for processing DTMF (Double Tone Multi-Frequency) based on RFC 2833 (Request For Comments 2833) message in NGN (Next Generation Network). Device. Background technique

NGN is a packet-based packet-based network technology. When transmitting voice media in NGN, the voice media to be sent is encapsulated into an RTP (Real-time Transport Protocol) packet, and the RTP packet is carried in UDP. (User Datagram Protocol, User Data Protocol) is transmitted in the message. DTMF as a voice signal, including in-band transmission mode and out-of-band transmission mode; the out-of-band transmission mode is generally encapsulated and transmitted in the RTP packet format of the RFC2833 message format, on the one hand, the voice detection work brought by the in-band transmission of the network voice terminal system is alleviated. The burden, on the other hand, avoids the problem of DTMF error detection by low bit rate codecs such as G.723.1, thereby improving the ability of the voice terminal device to automatically recognize DTMF. However, in an Internet Protocol (Internet Protocol), when a DTMF packet data message with high reliability and existing RFC2833 format is to be transmitted, the DTMF report may be caused due to transmission errors of the IP network, network congestion, and the like. If the file is lost, a large transmission delay is caused, so that the DTMF that the user hears is discontinuous, or the processing that cannot stop the DTMF normally stops affecting the voice service.

At present, the processing of the DTMF transmitted by the voice terminal device based on the RFC2833 message format must have the DTMF start event message, the intermediate event message, and the end event message; wherein, when the DTMF duration is short, the intermediate event The message may also be absent; for example: the received DTMF is processed only when the start event message is received; the DTMF is continuously processed when the intermediate event message is received, and the intermediate event message is 50 milliseconds or normal voice time. Interval check processing Once; when processing the end event message, stop processing DTMF. The DTMF processing method of the voice terminal device in the prior art can correctly process the DTMF when the network condition is good, such as when network congestion and network transmission errors do not occur; however, when the network condition is poor, it is possible The problem that the accuracy of the DTMF processing by the voice terminal device is poor due to the loss of the start event message, the intermediate event message, or the end event message. For example, when the start event message is lost, the voice terminal device cannot start normally. The received DTMF performs timely processing and reporting; when the intermediate event message is lost or delayed, the voice terminal device delays or stops processing the DTMF, thereby causing discontinuity in processing the DTMF, and having a breakpoint, bringing the user The discontinuous user experience; when the end event message is lost, the voice terminal device continues to process the DTMF, and the DTMF cannot be stopped, thereby affecting the normal voice service. Summary of the invention

The present invention provides a method and apparatus for processing DTMF to improve the accuracy and success rate of processing DTMF.

A method of processing dual tone multi-frequency (DTMF), including:

Receiving an event message of the current DTMF to be processed, determining an event type of the event message; setting a processing state of the current to-be-processed DTMF according to an event type of the event message;

And processing the current to-be-processed DTMF according to the processing state of the current to-be-processed DTMF. The processing status of the current to-be-processed DTMF is set according to the event type of the event message:

And when the event type of the event message is a start event message, setting a processing state of the current to-be-processed DTMF to a pending state;

And when the event type of the event message is an end event message, setting a processing state of the current to-be-processed DTMF to an end processing state;

When the event type of the event message is an intermediate event message, it is determined whether the record has been recorded. The event message is described, and the processing state of the current pending DTMF is set according to the judgment result. The processing status of the current to-be-processed DTMF is set according to the determination result: when the event message has been recorded, the corresponding event information that has been recorded is updated according to the event information of the event message, and is retained. The current processing status of the current DTMF to be processed; when the event message is not recorded, determining whether the end timestamp of the current pending DTMF is greater than the current processing timestamp; when greater than, the current pending DTMF The processing status is set to the pending status; otherwise, the processing status of the current pending DTMF is set to the ending status.

Further, the method further includes:

When the event type of the event message is a start event message, storing event information of the event message, where the event information includes an event value, a power value, a time stamp, a start event flag, an end event flag, and an event width. ;

When the event type of the event message is an end event message, setting an end timestamp of the current pending DTMF, and storing event information of the event message;

When the event type of the event message is an intermediate event message, and the end timestamp of the current pending DTMF is greater than the current processing timestamp, the event information of the event message is stored.

The processing the current pending DTMF is:

And when the processing state of the current to-be-processed DTMF is a to-be-processed state, initializing a processing function of the current to-be-processed DTMF, and setting a processing state of the current to-be-processed DTMF to a processing state;

When the processing status of the current to-be-processed DTMF is the processing status, it is determined whether the current pending DTMF has an end timestamp, and the current pending DTMF is processed according to the determination result.

The processing, according to the determination result, the current to-be-processed DTMF is:

When it is judged that there is no end time stamp and the current pending processing is received within the set time threshold When the intermediate event message of the DTMF is sent, the current pending DTMF is processed; when it is determined that the timestamp is not ended and the intermediate event message of the current pending DTMF is not received within the set time threshold, the Whether the current event width of the DTMF to be processed exceeds the set event width threshold; when it is exceeded, the current pending DTMF is stopped, otherwise, the current pending DTMF is processed;

When it is determined that there is an end timestamp, it is determined whether the current processing timestamp reaches the end timestamp of the current pending DTMF, and when it arrives, the current pending DTMF is stopped, and when it does not arrive, the current pending processing is continued. Process DTMF.

A device for processing dual tone multi-frequency (DTMF), comprising:

a determining unit, configured to receive an event message of the current DTMF to be processed, and determine an event type of the event message;

a setting unit, configured to set a processing state of the current to-be-processed DTMF according to an event type of the event message determined by the determining unit;

And a processing unit, configured to process the current to-be-processed DTMF according to a processing state of the current to-be-processed DTMF set by the setting unit.

The setting unit is specifically configured to: when the event type of the event message is a start event message, set the processing state of the current pending DTMF to a pending state; when the event message is When the event type is the end event message, the processing state of the current pending DTMF is set to the end processing state;

When the event type of the event message is an intermediate event message, it is determined whether the event message has been recorded, and the processing state of the current to-be-processed DTMF is set according to the determination result.

The setting unit is specifically configured to:

When the event message has been recorded, update the corresponding event information that has been recorded according to the event information of the event message, and retain the current processing status of the currently pending DTMF; when the event message is not recorded Determining an end time stamp of the current pending DTMF Whether it is greater than the current processing timestamp; when it is greater, the processing state of the current to-be-processed DTMF is set to a pending state; otherwise, the processing state of the current to-be-processed DTMF is set to an ending state.

The setting unit is further configured to: when event type of the event message is a start event message, store event information of the event message, where the event information includes an event value, a power value, a timestamp, The start event flag, the end event flag, and the event width are further configured to: when the event type of the event message is an end event message, set an end timestamp of the current pending DTMF, and store the event message The event information is further used to store the event information of the event message when the event type of the event message is an intermediate event message, and the end timestamp of the current pending DTMF is greater than the current processing timestamp.

The processing unit is specifically configured to:

When the processing status of the current to-be-processed DTMF is in the processing state, it is determined whether the current pending DTMF has an end timestamp, and the current to-be-processed DTM F is processed according to the determination result.

The processing unit is specifically configured to:

When it is determined that there is no end timestamp and the intermediate event message of the current to-be-processed DTMF is received within the set time threshold, the current pending DTMF is processed;

When it is determined that there is no end timestamp and the intermediate event message of the current pending DTMF is not received within the set time threshold, it is determined whether the event width of the current pending DTMF exceeds the set event width threshold; Temporarily stopping processing the current pending DTMF, otherwise, continuing to process the current pending DTMF;

When it is determined that there is an end timestamp, it is determined whether the current processing timestamp reaches the current waiting time The end timestamp of the DTMF, when it arrives, stops processing the current pending DTMF, and when it does not arrive, continues to process the current pending DTMF.

In the embodiment of the present invention, for the current DTMF to be processed, when the event message of the current DTMF to be processed is received, the processing state of the current to-be-processed DTMF is set according to the event type of the event message; Processing the DTMF processing state, processing the current to-be-processed DTMF; adopting the technical solution of the present invention, regardless of whether the current pending DTMF contains one or more event messages (such as a start event message, an intermediate event message, and an end event) The one or more of the messages can be processed correspondingly to the current DTMF to be processed, and there is no problem that the DTMF cannot be correctly processed due to the lack of one of the event messages, thereby overcoming the prior art. DTMF lacks any one or more of the start event message, intermediate event message, and end event message and cannot correctly handle the DTMF problem, resulting in lower accuracy and success rate of processing DTMF. The problem is lower; therefore, the technical solution of the present invention improves the correctness and success rate of processing DTMF. DRAWINGS

1 is a flowchart of a method for processing DTMF according to an embodiment of the present invention;

2 is a flowchart of a method for setting a processing state of a DTMF in a buffer receiving queue according to an embodiment of the present invention;

3 is a flow chart of a method for processing DTMF in a buffer processing queue according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for processing DTMF according to an embodiment of the present invention. detailed description

For the above technical problem existing in the prior art, an embodiment of the present invention provides a method and an apparatus for processing DTMF, so as to improve accuracy and success rate of processing DTMF; the method for processing DTMF includes: receiving a current DTMF to be processed Event message, determine the The event type of the event message; setting the current pending according to the event type of the event message

The processing state of the DTMF; processing the current pending DTMF according to the processing state of the current to-be-processed DTMF. According to the technical solution of the present invention, regardless of whether one or more of the event messages included in the current DTMF to be processed, such as one of the start event message, the intermediate event message, and the end event message, the current The DTMF to be processed is processed accordingly, and there is no problem that the DTMF cannot be correctly processed due to the lack of one of the event messages, thereby overcoming the lack of the start event message, the intermediate event message and the end event in the DTMF in the prior art. Any one or more event messages in the message cannot correctly handle the DTMF problem, resulting in a lower accuracy and lower success rate of processing the DTMF. Therefore, the technical solution of the present invention improves the DTMF. The correctness and success rate of the processing.

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a flowchart of a method for processing DTMF according to an embodiment of the present invention. The method includes: Step 101: Receive an event message of a current DTMF to be processed, and determine an event type of the event message.

Step 102: Set a processing state of the current to-be-processed DTMF according to an event type of the event message.

Step 103: Process the current to-be-processed DTMF according to the processing status of the current to-be-processed DTMF.

Preferably, the foregoing process step 102 may include: when the event type of the event message is a start event message, setting a processing state of the current to-be-processed DTMF to a pending state (ie, pending); When the event type of the event message is the end event message, the processing status of the current pending DTMF is set to the end processing state (ie, end); when the event type of the event message is an intermediate event message, Determining whether the event message has been recorded, and setting a processing state of the current pending DTMF according to the determination result. The setting the processing status of the current to-be-processed DTMF according to the determination result may specifically include: when the event has been recorded If the event message is not recorded, it is determined whether the end timestamp of the current pending DTMF is greater than the current processing timestamp; And, the processing state of the current to-be-processed DTMF is set to a pending state; if not, the processing state of the current to-be-processed DTMF is set to an ending state.

Preferably, the step 102 of the foregoing process may further include: when the event type of the event message is a start event message, storing event information of the event message, where the event information includes an event value, a power value, a timestamp, a start event flag, an end event flag, and an event width; when the event type of the event message is an end event message, setting an end timestamp of the current pending DTMF, and storing the event message Event information: When the event type of the event message is an intermediate event message, and the end timestamp of the current pending DTMF is greater than the current processing timestamp, the event information of the event message is stored.

The foregoing process step 103 may specifically include: when the processing state of the current to-be-processed DTMF is a waiting processing state, initializing a processing function of the current to-be-processed DTMF, and setting a processing state of the current to-be-processed DTMF to The processing status is being processed; when the processing status of the current to-be-processed DTMF is the processing status, determining whether the current pending DTMF has an end timestamp, and processing the current to-be-processed DTMF according to the determination result.

The processing the current to-be-processed DTMF according to the determination result may include: when it is determined that the timestamp is not ended and the intermediate event of the current to-be-processed DTMF is received within the set time threshold, continuing to process the The current DTMF to be processed, where the time threshold can be set to 50 milliseconds according to the empirical value; when it is determined that the timestamp is not ended and the intermediate event of the current pending DTMF is not received within the set time threshold Determining whether the event width of the current pending DTMF exceeds a set event width threshold, where the event width threshold may be set to 8 seconds according to an empirical value; if yes, stopping processing the current pending DTMF, if not, Then continue to process the current pending DTMF; when it is determined that there is an end timestamp, judge Whether the current processing timestamp reaches the end timestamp of the current pending DTMF, if it arrives, stops processing the current to-be-processed DTMF, and if not, continues to process the current to-be-processed DTMF.

In a practical application, the buffer receiving queue can be used to implement steps 101 to 102 in the above process, and the buffer processing queue is used to implement step 103 in the above process. When receiving the event message based on the RFC2833 message format, the buffer receiving queue stores the event information of the event message when it is determined that the event message is a start event message, and sets the processing state of the corresponding DTMF to If the event message is an intermediate event message, the following processing is performed: According to the RTP timestamp of the intermediate event message, if the event message has been recorded in the buffer receiving queue, according to the intermediate event message The event information updates the corresponding event information that has been stored, and sets the processing status of the corresponding DTMF to working; if the event message is not recorded in the buffer receiving queue, it is determined that the end time stamp of the current pending DTMF is obtained. When the current processing timestamp is greater than the current processing timestamp, the processing state of the current pending DTMF is set to pending, otherwise, the processing state of the current pending DTMF is set to end. The buffer processing queue periodically or periodically views the buffer receiving queue. When the processing status of the DTMF currently needing to be processed in the buffer receiving queue is pending, the buffer processing queue initializes the processing function of the DTMF, and the processing status of the DTMF is Set to working; when the processing status of the DTMF currently needing to be processed in the buffer receiving queue is working, determine whether the DTMF has an end timestamp, if there is no end timestamp and the DTMF is not received within the set time threshold In the intermediate event message, it is determined whether the event width according to the DTMF reaches the set event width threshold. If the set event width threshold is an empirical value of 8 seconds, if the event width threshold is reached, the processing of the DTMF is stopped, and the The processing state of DTMF is set to end, and if the time width threshold is not reached, DTMF continues to be processed.

2 is a flowchart of a method for setting a processing state of a DTMF in a buffer receiving queue according to an embodiment of the present invention, where the method includes the following steps: Step 201: The buffer receiving queue receives the event packet, and stores the received event packet. Step 202: Determine, according to an event flag bit of the event message, an event type of the event message.

Step 203: When the event type of the event message is a start event message, the event information of the event message is written into the buffer, and the processing state of the corresponding DTMF is set to pending.

Step 204: When the event type of the event packet is an intermediate event packet, determine whether the event packet has been recorded in the buffer receiving queue. If yes, go to step 206. Otherwise, go to step 207.

Step 205: When the event type of the event message is an end event message, write event information of the event message into a buffer, and set a processing state of the corresponding DTMF to end, and mark the event End timestamp of DTMF, go to step 210.

Step 206: Update the timestamp and the event width of the DTMF according to the event information of the event message, and perform step 210.

Step 207: Determine whether the current timestamp of the DTMF is greater than a current processing timestamp. If yes, go to step 208. Otherwise, go to step 209.

Step 208: Write the event information of the event message into the buffer, and set the processing status of the corresponding DTMF to pending, and perform step 210.

Step 209: Discard the DTMF.

Step 210, ending the process.

Referring to FIG. 3, it is a flowchart of a method for processing DTMF in a buffer processing queue according to an embodiment of the present invention, where the method includes:

Step 301: View the buffer receiving queue periodically or periodically, and determine the DTMF currently needed to be processed in the buffer receiving queue.

Step 302: Determine a current processing status of the DTMF. Step 303: When the processing state of the DTMF is pending, initialize the processing function of the DTMF, and set the processing state of the DTMF to working, and perform step 301.

Step 304: When the processing state of the DTMF is working, process the DTMF, and determine whether the DTMF has an end timestamp. If not, execute step 305. Otherwise, go to step 307.

Step 305: Determine whether the intermediate event message of the DTMF is received within the set time threshold. If yes, execute step 301; otherwise, perform step 306.

Step 306: Determine whether the event width of the DTMF reaches the set event width threshold. If yes, execute step 308. Otherwise, perform step 301.

Step 307: Determine whether the current processing timestamp of the DTMF is processed to reach the end timestamp of the DTMF, and if yes, execute step 308; otherwise, perform step 301.

Step 308: Stop processing the DTMF, and set the processing state of the DTMF to end. Step 309, ending the process.

Based on the same concept of the above method, the embodiment of the present invention further provides a device for processing DTMF, and the structure of the device is as shown in FIG.

4 is a schematic structural diagram of an apparatus for processing a DTMF according to an embodiment of the present invention, including: a determining unit 41, configured to receive an event message of a current DTMF to be processed, and determine an event type of the event message;

The setting unit 42 is configured to set a processing state of the current to-be-processed DTMF according to an event type of the event message determined by the determining unit 41;

The processing unit 43 is configured to process the current to-be-processed DTMF according to the processing status of the current to-be-processed DTMF set by the setting unit 42.

The setting unit 42 is specifically configured to: when the event type of the event message is a start event message, set a processing state of the current to-be-processed DTMF to a pending state;

When the event type of the event packet is an end event packet, the current pending The processing state of the DTMF is set to the end processing state;

The setting unit 42 sets the processing state of the current to-be-processed DTMF according to the determination result, specifically for:

When the event message has been recorded, updating the corresponding event information that has been recorded according to the event information of the event message;

When the event message is not recorded, it is determined whether the end timestamp of the current pending DTMF is greater than the current processing timestamp; if yes, the processing state of the current pending DTMF is set to a pending state; if not, Then, the processing state of the current to-be-processed DTMF is set to an end state.

The setting unit 42 is further configured to: when the event type of the event message is a start event message, storing event information of the event message, where the event information includes an event value, a power value, a time stamp, and a start event flag. And ending the event flag and the event width; and when the event type of the event message is an end event message, setting an end timestamp of the current pending DTMF, and storing event information of the event message; And when the event type of the event message is an intermediate event message, and the end timestamp of the current pending DTMF is greater than the current processing timestamp, the event information of the event message is stored.

Preferably, the processing unit 43 is specifically configured to: when the processing state of the current to-be-processed DTMF is a waiting processing state, initialize a processing function of the current to-be-processed DTMF, and the current to-be-processed DTMF The processing status is set to the processing status;

The processing unit 43 processes the current to-be-processed DTMF according to the determination result, specifically for: When it is judged that there is no end time stamp and the current pending processing is received within the set time threshold

When the DTMF intermediate event message continues, the current pending DTMF is processed;

When it is determined that there is no end timestamp and the intermediate event message of the current to-be-processed DTMF is not received within the set time threshold, it is determined whether the event width of the current pending DTMF exceeds the set event width threshold; if yes, Stop processing the current to-be-processed DTMF, and if not, proceed to process the current to-be-processed DTMF;

When it is determined that there is an end timestamp, it is determined whether the current processing timestamp reaches the end timestamp of the current pending DTMF, and if it arrives, the current pending DTMF is stopped, and if not, the current pending processing is continued. Process DTMF.

In the embodiment of the present invention, for the current DTMF to be processed, when the event message of the current DTMF to be processed is received, the processing state of the current to-be-processed DTMF is set according to the event type of the event message; Processing the DTMF processing state, processing the current to-be-processed DTMF; adopting the technical solution of the present invention, regardless of whether the current pending DTMF contains one or more event messages, such as a start event message, an intermediate event message, and an end event. One or more of the messages can perform corresponding processing on the current pending DTMF, and there is no problem that the DTMF cannot be correctly processed due to the lack of one of the event messages, thereby overcoming the prior art in DTMF. When any one or more event messages in the start event message, the intermediate event message, and the end event message are missing, the problem of DTMF cannot be correctly processed, resulting in lower accuracy and success rate of processing DTMF. Low problem; therefore, the technical solution of the invention improves the correctness and success rate of processing DTMF

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Claim

A method for processing a dual-tone multi-frequency DTMF, the method comprising: receiving an event message of a current DTMF to be processed, determining an event type of the event message; The event type sets the processing status of the current pending DTMF;

And processing the current to-be-processed DTMF according to the processing state of the current to-be-processed DTMF.

2. The method according to claim 1, wherein the processing state of the current pending DTMF is set according to an event type of the event message:

The method according to claim 2, wherein the processing state of the current to-be-processed DTMF is set according to the determination result:

When the event message has been recorded, update the corresponding event information that has been recorded according to the event information of the event message, and retain the current processing status of the currently pending DTMF; when the event message is not recorded Determining whether the end timestamp of the current pending DTMF is greater than the current processing timestamp; when greater than, setting the processing state of the current pending DTMF to a pending state; otherwise, the current pending DTMF The processing status is set to the end state.

The method of claim 3, wherein the method further comprises: when the event type of the event message is a start event message, storing event information of the event message, the event Information includes event values, power values, time stamps, start event flags, End event flag and event width;

When the event type of the event packet is an end event packet, setting the current pending

End timestamp of the DTMF, and storing event information of the event message;

5. The method according to claim 2, wherein the processing the current pending DTMF is:

The method according to claim 5, wherein the processing the current pending DTMF according to the determination result is:

When it is determined that there is no end timestamp and the intermediate event message of the current to-be-processed DTMF is not received within the set time threshold, it is determined whether the event width of the current pending DTMF exceeds the set event width threshold; Stop processing the current pending DTMF, otherwise, continue processing the current to-be-processed DTMF;

7. A device for processing a dual tone multi-frequency DTMF, the device comprising: a determining unit, configured to receive an event message of the current DTMF to be processed, and determine an event type of the event message;

The device according to claim 7, wherein the setting unit is configured to: when the event type of the event message is a start event message, the processing status of the current pending DTMF Set to the pending state;

The device according to claim 8, wherein the setting unit is configured to: when the event message has been recorded, update corresponding records that have been recorded according to event information of the event message Event information, and retaining the current processing status of the current pending DTMF; when the event message is not recorded, determining whether the end timestamp of the current pending DTMF is greater than the current processing timestamp; The processing status of the current pending DTMF is set to the pending status; otherwise, the processing status of the current pending DTMF is set to the ending status.

The device according to claim 9, wherein the setting unit is further configured to: when the event type of the event message is a start event message, storing event information of the event message, where The event information includes an event value, a power value, a time stamp, a start event flag, an end event flag, and an event width. The method further includes: setting the current pending DTMF when the event type of the event message is an end event message. End timestamp, and store the event message The event information is further used to store the event information of the event message when the event type of the event message is an intermediate event message, and the end timestamp of the current pending DTMF is greater than the current processing timestamp. .

The device according to claim 8, wherein the processing unit is specifically configured to:

The device according to claim 11, wherein the processing unit is configured to: when it is determined that the timestamp is not ended, and the current pending is received within a set time threshold