CN113114853A - Method, system and storage medium for realizing media channel switching working mode - Google Patents
Method, system and storage medium for realizing media channel switching working mode Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
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- H04M3/2263—Network management
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The invention discloses a method, a system and a storage medium for realizing media channel switching working mode, wherein the method comprises the steps that a gateway detects a media signal sent by a terminal; when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to be switched from a voice mode to a transparent transmission mode. The receiving gateway or the sending gateway of the invention directly switches the voice mode to the transparent transmission mode once detecting ANS signals without reporting the signaling gateway, and the media server switches the gateway control media channel, thereby reducing the operation flow, greatly improving the switching efficiency, reducing the time consumption, improving the transparent transmission success rate by performing signal combination processing operation after switching to transparent transmission, and reducing the complexity of equipment maintenance.
Description
Technical Field
The invention relates to the technical field of voice, in particular to a method, a system and a storage medium for realizing a media channel switching working mode.
Background
The decision to make a voice or modem call cannot usually be made in advance when connecting a new call. Modem connections use a series of tones to indicate their presence, which makes modem detection relatively easy, while voice phone detection is much more complex because voice phones have a wide variety of behaviors and sounds. Thus, a voice connection is made at the beginning of the call and a modem connection is switched to the modem when detected.
Generally, the method of switching from voice connection to modem connection is to notify the detection event to the signaling gateway when the signal detector detects the tone of the modem, and the signaling gateway controls the media channel to be switched from the voice connection to the modem connection.
Accordingly, there is a need for improvements and developments in the art.
Disclosure of Invention
Based on this, the invention provides a method, a system and a storage medium for realizing media channel switching working mode, and aims to solve the technical problem that time consumption is long when voice connection is switched to modem connection in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for realizing media channel switching working mode includes following steps:
the gateway detects a media signal sent by a terminal;
when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to be switched from a voice mode to a transparent transmission mode.
Optionally, the method for implementing the media channel switching operation mode further includes:
when the media signal detected by the gateway is not an ANS signal, the gateway controls the media channel to keep the voice mode unchanged.
Optionally, when the media signal detected by the gateway is an ANS signal, the controlling, by the gateway, the media channel to be switched from the voice mode to the transparent transmission mode specifically includes:
when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to switch the voice mode to the transparent transmission mode by performing operations of closing voice activity detection, disabling a DC-removing filter, setting a data packet jitter buffer and closing a nonlinear echo canceller within a preset switching time.
Optionally, the preset switching time is 0-0.1 second.
Optionally, when the media signal detected by the gateway is an ANS signal, the controlling, by the gateway, the media channel to switch from the voice mode to the transparent transmission mode includes:
after switching to the transparent transmission mode, the gateway determines the coding type carried by the received voice packet;
and when the coding type carried by the voice packet is different from the preset coding and decoding type, the gateway automatically switches the coding type carried by the voice packet into the preset coding and decoding type and sends the switched voice packet to the terminal.
Optionally, the preset encoding and decoding type is stored in the gateway, and the preset encoding and decoding type includes g.711a for indicating the transparent transmission mode or g.711u for indicating the transparent transmission mode.
Optionally, the method further includes:
and when the coding type carried by the voice packet is the same as the preset coding and decoding type, the gateway keeps the coding type carried by the voice packet unchanged and sends the voice packet to the terminal.
Optionally, after the gateway controls the media channel to switch from the voice mode to the transparent transmission mode, the method further includes:
and after switching to the transparent transmission mode, when the media signal detected by the gateway is a/ANS signal or/ANsam signal, the gateway controls the media channel to execute the operation of disabling the linear echo canceller. .
The invention also provides a system, which comprises a processor and a memory connected with the processor, wherein the memory stores an implementation program of the media channel switching working mode, and the processor is used for implementing the steps of the implementation method of the media channel switching working mode when executing.
The present invention also provides a computer-readable storage medium, which stores one or more programs that can be executed by one or more processors to implement the steps in the method for implementing media channel switching operation mode.
Has the advantages that:
compared with the prior art, the invention provides a method, a system and a storage medium for realizing the media channel switching working mode, wherein the method comprises the steps that a gateway detects a media signal sent by a terminal; when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to be switched from a voice mode to a transparent transmission mode. The receiving gateway or the sending gateway of the invention directly switches the voice mode to the transparent transmission mode once detecting ANS signals without reporting the media server, and the media server switches the gateway control media channel, thereby reducing the operation flow, greatly improving the switching efficiency, reducing the time consumption, improving the transparent transmission success rate by performing signal combination processing operation after switching to transparent transmission, and reducing the complexity of equipment maintenance.
Drawings
Fig. 1 is a schematic topology diagram of a method for implementing a media channel switching operation mode according to the present invention.
Fig. 2 is a flowchart of a method for implementing a media channel switching operation mode according to the present invention.
Fig. 3 is a functional block diagram of the system of the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The inventor researches and discovers that the conventional method for switching the voice mode to the transparent transmission mode under the modem is that after the tone of the modem is detected by the signaling gateway, the signaling gateway reports the detection event to the media server, and then the media server controls the media channel to carry out switching operation through the signaling gateway. Therefore, in the method for implementing the media channel switching working mode provided by the invention, once the signaling gateway detects the tone of the modem, the media channel is directly controlled to carry out switching operation without a media server, thereby reducing the operation and saving the time.
For further understanding of the technical solution of the present invention, the following description is made with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 illustrates a topology diagram of a method for implementing a media channel switching operation mode according to the present invention. As shown in fig. 1, during a voice call, a voice connection is established through an IP network, after the connection is successful, a calling party (also called a sending terminal) sends a media signal and a voice packet to a called party (also called a receiving terminal) through a sending gateway, and the receiving gateway of the called party determines a transmission mode of a media channel according to the media signal, processes the voice packet in the determined transmission mode, and sends the processed voice packet to the receiving terminal.
In specific implementation, please refer to fig. 2, fig. 2 is a flowchart of a method for implementing a media channel switching operation mode according to the present invention, and it should be noted that the method for implementing a media channel switching operation mode according to the present invention is not limited to the steps and the sequence in the flowchart shown in fig. 2, and the steps in the flowchart may be added, removed, or changed according to different requirements.
As shown in fig. 2, the method for implementing the media channel switching operation mode provided by the present invention includes the following steps:
and S10, the gateway detects the media signal sent by the terminal.
In the embodiment of the invention, the gateway comprises a sending gateway and a receiving gateway. And the receiving gateway is used for processing the media stream fed back by the receiving sending side. The media stream mainly includes a language stream, a data stream, a video stream, and the like. The data stream mainly refers to a signal, namely a media signal, sent by data equipment such as a modem, an access server, a common fax machine, a high-speed fax machine and the like in an interaction process. The media signal includes an ANS signal (ansr), an/ANS signal (ansr with amplitude modulation), an/ANSam signal (ansr with phase inversion and amplitude modulation), and the like.
Of course, the sending gateway has the same principle as the receiving gateway. The working modes of transmitting data streams through the gateway mainly include a transparent transmission mode and a T.38 mode. The embodiment is directed to the transparent mode application.
The transparent transmission mode is that the data stream is used as the common voice stream to carry out lossless coding and decoding processing through an ITU-T G.711 coding and decoding mode, and the mode has the advantages of simple realization and no need of relating the meaning of a specific data signal, and only needs to be processed as voice.
The mode switching of the media channel is switching between voice stream and data stream transmission in the media channel according to the requirement, and the condition for triggering the media channel switching is that the gateway detects various specific media signals sent by the terminal on the media channel. Thus, the gateway distinguishes between the facsimile device and the modem device by the unique media signals transmitted from the various terminals, thereby switching to different transmission modes.
The gateway has detection energy of data signal equipment, ANS signals,/ANSam signals sent by the modem in the media signals, and the transmission mode of a media channel corresponding to the modem is a transparent transmission mode.
And S20, when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to be switched from a voice mode to a transparent transmission mode.
In the embodiment of the invention, a preset coding and decoding type for self-switching to a transparent transmission mode is preset in the receiving gateway and the sending gateway, and the preset coding and decoding type is used for indicating the receiving gateway or the sending gateway to control a media channel to transmit the modem signals by using the preset coding and decoding type. The preset editing code type comprises G.711A used for indicating a pass-through mode or G.711U used for indicating a pass-through mode.
It should be noted that the voice packet for indicating transmission by the codec can be successfully transmitted in the media channel only by carrying the type of the edit code configured by the receiving gateway or the sending gateway, so as to be received by the receiving terminal or the sending terminal.
Specifically, when the media signal detected by the gateway is an ANS signal, the controlling, by the gateway, the media channel to switch from the voice mode to the transparent transmission mode specifically includes:
and S21, when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to switch the voice mode to the transparent transmission mode by performing operations of closing voice activity detection, disabling the DC-removing filter, setting a data packet jitter buffer and closing the non-linear echo canceller within a preset switching time.
During a voice call, whether the receiving gateway or the sending gateway, once the detected media signal is an ANS signal, the receiving gateway or the sending gateway controls the media channel to switch from the voice mode to the transparent transmission mode.
In order to ensure the speed of transparent transmission mode switching, eliminate interference effects such as noise and echo, and simultaneously, determine the success rate of modulation/demodulation transmission by the combination of processing operations on signals after identification, whether the receiving gateway controls the media channel to be switched to the transparent transmission mode or the sending gateway controls the media channel to be switched to the transparent transmission mode, relevant operations need to be performed on a plurality of functional components in the media channel, and the operations include closing voice activity detection, disabling a dc-removing filter, setting a data packet jitter buffer, closing a nonlinear echo canceller, and the like, which is specifically as follows:
1. set the packet jitter buffer to a fixed value:
because the gateway is easily affected by IP network fluctuation when adopting the transparent transmission mode to transmit data stream, and the quality can not be ensured when more packet loss and larger time delay change occur on the IP network, the invention respectively arranges data packet jitter buffer zones with certain threshold values at the two ends of the transmitted data stream, namely the receiving terminal and the sending terminal, and the data packet jitter buffer zones are used for adding enough delay to compensate jitter, thereby delaying to reach the voice packet with relatively earlier time, so as to ensure that the voice packet is completely received to the maximum extent, thereby eliminating the problems of larger voice packet jitter and reducing the voice packet loss probability.
In the transparent mode of the modem, the delay has no obvious influence on the connection quality, therefore, the modem is designed to be used for the application with constant end-to-end delay, and based on the characteristic, the data packet jitter buffer does not need to be adjusted at any moment in the transparent mode, therefore, the data packet jitter buffer is set to a fixed value through the v90 modem as the optimal jitter buffer of the modem. Empirically, the range of the packet jitter buffer is set to be 50-100 milliseconds. The packet jitter buffer is set to 60 ms for optimization in the present invention.
2. Turning off voice activity detection
When the voice activity detection is started, when the signal energy is lower than a given threshold, the voice DSP stops sending data packets, and the receiving end generates comfortable noise. Therefore, when using modem pass-through, the voice DSP must be as transparent as possible, requiring voice activity detection to be disabled.
3. Forbidden DC filter
In speech mode, dc removal of the speech signal, i.e. with the operation of disabling the dc-removing filter, is required in order to maximize the dynamic range of the encoder, which may cause problems when using modem pass-through, especially for v.90 connections, and therefore the filter must be disabled during the modem pass-through connection.
Further, since the high-speed fax machine can send out/ANS signals and/ANsam signals as the modem does, the gateway controls the media channel to perform the operation of disabling the linear echo canceller if the media signal detected by the receiving gateway or the transmitting gateway is/ANS signal or/ANSam signal during the process of switching the transparent transmission mode.
It should be noted that the low speed fax machine is not capable of issuing/ANS signals and/ANsam signals.
In order to ensure the switching speed and the transmission success rate, the gateway must ensure that the switching time is within the preset switching time when performing the above related operations. The preset switching time is 0-0.1 second.
Of course, if the media signal detected by the gateway is not an ANS signal, the gateway controls the media channel to keep the voice mode unchanged, and does not perform the switching operation.
Further, after the transparent transmission mode is switched to, the condition that the voice packet is successfully transmitted in the transparent transmission mode of the media channel is that the encoding type carried by the voice packet is the same as the preset encoding and decoding type configured by the gateway and used for the transparent transmission mode, and then the voice packet can be transmitted.
Therefore, when the media signal detected by the gateway is an ANS signal, the controlling, by the gateway, the media channel to switch from the voice mode to the transparent transmission mode includes:
after switching to the transparent transmission mode, the gateway determines the coding type carried by the received voice packet;
and when the coding type carried by the voice packet is different from the preset coding and decoding type, the gateway automatically switches the coding type carried by the voice packet into the preset coding and decoding type and sends the switched voice packet to the terminal.
That is, the voice packets in the media channel are losslessly encoded and losslessly decoded according to the encoding type corresponding to the media channel.
Of course, if the coding type carried by the voice packet is the same as the preset coding and decoding type, the gateway keeps the coding type carried by the voice packet unchanged, and sends the voice packet to the terminal.
Thus, based on steps S10 and S20, switching from voice connection to modem connection is accurately and quickly achieved through identification of tones of the modem corresponding to the ANS signal or/and ANsam signal or interactive gateway configuration matching, the transmission application range is expanded, the success rate of modem transmission is achieved through combination of processing operations on the signals after identification is determined, and the complexity of equipment maintenance is reduced.
Based on the above implementation method for switching the operating mode of the media channel, the present invention also provides a system, as shown in fig. 3, where the system 100 includes a processor 11 and a memory 22 connected to the processor 11, and fig. 3 only shows some components of the system 100, but it should be understood that not all of the shown components are required to be implemented, and more or less components may be implemented instead.
The storage 22 may be an internal storage unit of the system 100, such as a memory of the system 100, in some embodiments. The memory 22 may also be an external storage device of the system 100 in other embodiments, such as a plug-in U-disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the system 100. Further, the memory 22 may also include both internal storage units and external storage devices of the system 100. The memory 22 is used for storing application software installed in the system 100 and various data, such as implementation program codes of the media channel switching operation mode. The memory 22 may also be used to temporarily store data that has been output or is to be output. In an embodiment, the memory 22 stores a program for implementing the media channel switching operation mode, and the program for implementing the media channel switching operation mode can be executed by the processor 11, so as to implement the method for implementing the media channel switching operation mode in this application, which is specifically described above.
In some embodiments, the processor 11 may be a Central Processing Unit (CPU), a microprocessor, a mobile phone baseband processor or other data Processing chip, and is configured to run a program code stored in the memory 22 or process data, for example, execute an implementation method of the media channel switching operation mode, and the like, which is specifically described in the foregoing method.
The present invention further provides a computer-readable storage medium, which stores one or more programs, where the one or more programs are executable by one or more processors (in this embodiment, the processor 11) to implement the steps in the method for implementing a media channel switching operation mode according to the present invention, specifically the method described above.
In summary, the present invention provides a method, a system and a storage medium for implementing a media channel switching operation mode, where the method includes detecting a media signal sent by a terminal by a gateway; when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to be switched from a voice mode to a transparent transmission mode. The receiving gateway or the sending gateway of the invention directly switches the voice mode to the transparent transmission mode once detecting ANS signals without reporting the media server, and the media server switches the gateway control media channel, thereby reducing the operation flow, greatly improving the switching efficiency, reducing the time consumption, improving the transparent transmission success rate by performing signal combination processing operation after switching to transparent transmission, and reducing the complexity of equipment maintenance.
Of course, it will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program instructing relevant hardware (such as a processor, a controller, etc.), and the program may be stored in a computer readable storage medium, and when executed, the program may include the processes of the above method embodiments. The storage medium may be a memory, a magnetic disk, an optical disk, etc.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A method for implementing media channel switching working mode is characterized in that the method for implementing media channel switching working mode comprises the following steps:
the gateway detects a media signal sent by a terminal;
when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to be switched from a voice mode to a transparent transmission mode.
2. The method for implementing media channel switching operation mode according to claim 1, wherein the method for implementing media channel switching operation mode further comprises:
when the media signal detected by the gateway is not an ANS signal, the gateway controls the media channel to keep the voice mode unchanged.
3. The method according to claim 1, wherein when the media signal detected by the gateway is an ANS signal, the controlling, by the gateway, the media channel to switch from the voice mode to the transparent transmission mode specifically includes:
when the media signal detected by the gateway is an ANS signal, the gateway controls the media channel to switch the voice mode to the transparent transmission mode by performing operations of closing voice activity detection, disabling a DC-removing filter, setting a data packet jitter buffer and closing a nonlinear echo canceller within a preset switching time.
4. The method as claimed in claim 3, wherein the predetermined switching time is 0-0.1 seconds.
5. The method as claimed in claim 1, wherein when the media signal detected by the gateway is an ANS signal, the controlling, by the gateway, the media channel to switch from the voice mode to the transparent transmission mode includes:
after switching to the transparent transmission mode, the gateway determines the coding type carried by the received voice packet;
and when the coding type carried by the voice packet is different from the preset coding and decoding type, the gateway automatically switches the coding type carried by the voice packet into the preset coding and decoding type and sends the switched voice packet to the terminal.
6. The method as claimed in claim 5, wherein the preset codec type is stored in the gateway, and the preset codec type includes g.711a for indicating the transparent transmission mode or g.711u for indicating the transparent transmission mode.
7. The method for implementing media channel switching operation mode according to claim 5, further comprising:
and when the coding type carried by the voice packet is the same as the preset coding and decoding type, the gateway keeps the coding type carried by the voice packet unchanged and sends the voice packet to the terminal.
8. The method as claimed in claim 1, wherein the step of controlling the media channel to switch from the voice mode to the transparent transmission mode by the gateway further comprises:
and after switching to the transparent transmission mode, when the media signal detected by the gateway is a/ANS signal or/ANSam signal, the gateway controls the media channel to execute the operation of disabling the linear echo canceller.
9. A system, characterized in that the system comprises a processor and a memory connected with the processor, the memory stores an implementation program of a media channel switching operation mode, and the processor is used for implementing the steps in the implementation method of the media channel switching operation mode according to any one of claims 1 to 8.
10. A computer-readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the steps in the method for implementing a media channel switching mode of operation as claimed in any one of claims 1 to 8.
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Application publication date: 20210713 |
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