CN114466320A - Session negotiation method, apparatus, electronic device, and computer-readable medium - Google Patents

Abstract

The embodiment of the disclosure provides a session negotiation method, a device, electronic equipment and a computer readable medium, wherein the method comprises the following steps: carrying out initial conversation media negotiation and resource reservation confirmation with the called terminal; receiving a media negotiation message sent by a color ring platform, and finishing color ring media negotiation; negotiating with the network to confirm the current speech rate coding mode; sending a response message to the color ring platform, wherein the response message comprises the current voice rate coding mode; and receiving and playing a target audio file returned by the color ring platform according to the current voice rate coding mode. The session negotiation method, the session negotiation device, the electronic device and the readable medium provided by the embodiment of the disclosure can adapt to the current media state of the network to negotiate the current speech rate coding mode, so as to return a target audio file according to the current speech rate coding mode, and improve the playing effect of the audio file in the session process.

Description

Session negotiation method, apparatus, electronic device, and computer-readable medium

technical field

The present disclosure relates to the field of terminal technologies, and in particular, to a session negotiation method, apparatus, electronic device, and computer-readable medium.

Background technique

Video CRBT is a characteristic service of Voice over Long-Term Evolution (Voice over Long-Term Evolution, VoLTE), which evolves the original "listened CRBT" into "watched CRBT". When a user makes a voice call or video call under the VoLTE network, the calling terminal will see a short video content customized by the called user before the call is connected.

At present, the source file voice coding of the terminal video CRBT adopts the Adaptive Multi-Rate Wideband (AMR-WB) coding format, which has a total of 9 coding modes as shown in Table 1. In order to achieve the best playback of the CRBT As a result, at present, the highest encoding mode, mode 8 (23.85kbps) is used for voice encoding when making the CRBT source file.

Table 1 AMR-WB codec rate requirements

When the user initiates voice, the CRBT media negotiation between the calling terminal and the CRBT platform is only used to confirm that the terminal has the media playback capability. If the network resources are tight or other reasons, the current network resources of the terminal cannot meet the requirements of the voice encoding mode of the video CRBT source file when playing the video CRBT, and the sound playback effect of the video CRBT is poor.

Therefore, there is a need for a new session negotiation method, apparatus, electronic device and computer-readable medium.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the disclosure.

SUMMARY OF THE INVENTION

In view of this, embodiments of the present disclosure provide a session negotiation method, apparatus, electronic device, and computer-readable medium, which can adapt to the current media state of the network to negotiate a current voice rate encoding mode, so as to return a target audio file according to the current voice rate encoding mode to improve the playback of audio files during a session.

Other features and advantages of the present disclosure will become apparent from the following detailed description, or be learned in part by practice of the present disclosure.

According to a first aspect of the embodiments of the present disclosure, a session negotiation method is proposed, the method includes: performing initial call media negotiation and resource reservation confirmation with a called terminal; receiving a media negotiation message sent by a CRBT platform, and completing CRBT media negotiation; Negotiate with the network to confirm the current voice rate coding mode; send a response message to the CRBT platform, the response message includes the current voice rate coding mode; receive and play the target audio file returned by the CRBT platform according to the current voice rate coding mode.

In an exemplary embodiment of the present disclosure, the target audio file is that after the CRBT platform generates multiple alternative audio files according to multiple alternative voice rate encoding modes, the selected from an alternate audio file.

In an exemplary embodiment of the present disclosure, sending a response message to the CRBT platform includes: confirming the media capability and resource reservation status of the calling terminal; according to the media capability, the resource reservation status and the The current speech rate encoding mode generates the reply message.

In an exemplary embodiment of the present disclosure, the method further includes: negotiating with the network to determine the current speech coding mode according to network resource conditions of the network.

According to a second aspect of the embodiments of the present disclosure, a method for session negotiation is proposed. The method includes: after a calling terminal and a called terminal perform initial call media negotiation and resource reservation confirmation, sending media negotiation to the calling terminal message to complete the CRBT media negotiation; receive a response message sent by the calling terminal, the response message includes the current voice rate encoding mode; return the target audio file to the calling terminal according to the current voice rate encoding mode, so as to The calling terminal plays the target audio file.

In an exemplary embodiment of the present disclosure, returning the target audio file to the calling terminal according to the current voice rate encoding mode includes: generating multiple alternative audio files according to multiple alternative voice rate encoding modes; The current speech rate encoding mode determines the target audio file among the plurality of candidate audio files and returns to the calling terminal.

In an exemplary embodiment of the present disclosure, the response message further includes the media capability and resource reservation status of the calling terminal.

In an exemplary embodiment of the present disclosure, the current speech rate coding mode is determined by the calling terminal through negotiation with the network according to network resource conditions of the network.

According to a third aspect of the embodiments of the present disclosure, a session negotiation system is proposed. The system includes: a calling terminal for performing initial call media negotiation and resource reservation confirmation with a called terminal; receiving a media negotiation message sent by a CRBT platform , complete the CRBT media negotiation; negotiate with the network to confirm the current voice rate coding mode; send a response message to the CRBT platform, where the response message includes the current voice rate coding mode; receive the target returned by the CRBT platform according to the current voice rate coding mode audio file and play; the CRBT platform is used to send a media negotiation message to the calling terminal after the initial call media negotiation and resource reservation confirmation between the calling terminal and the called terminal; receive the response sent by the calling terminal message; return the target audio file to the calling terminal according to the current voice rate encoding mode.

According to a fourth aspect of the embodiments of the present disclosure, an electronic device is provided, the electronic device includes: one or more processors; a storage device for storing one or more programs; when the one or more programs are stored The one or more processors execute, so that the one or more processors implement the session negotiation method described in any one of the above.

According to a fifth aspect of the embodiments of the present disclosure, a computer-readable medium is provided, on which a computer program is stored, and when the program is executed by a processor, implements the session negotiation method according to any one of the above.

According to the session negotiation method, apparatus, electronic device, and computer-readable medium provided by some embodiments of the present disclosure, initial call media negotiation and resource reservation confirmation are performed between the calling terminal and the called terminal, and the host terminal and the CRBT platform complete the CRBT After media negotiation, the calling terminal also negotiates the current voice rate coding mode according to the current media state of the network, and carries it in the response message, so that the CRBT platform can return the target audio file that conforms to the current media state of the network according to the current voice rate coding mode. Improves the playback of audio files during a session.

It is to be understood that the foregoing general description and the following detailed description are exemplary only and do not limit the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. The drawings described below are only some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is a partial flowchart of a video color ring back tone service according to an exemplary embodiment.

Fig. 2 is a flowchart of a session negotiation method according to an exemplary embodiment.

Fig. 3 is a flow chart of a session negotiation method according to another exemplary embodiment.

Fig. 4 is a flow chart of a session negotiation method according to yet another exemplary embodiment.

Fig. 5 is a block diagram of a session negotiation system according to an exemplary embodiment.

FIG. 6 schematically shows a block diagram of an electronic device in an exemplary embodiment of the present disclosure.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated descriptions will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solutions of the present invention may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the present invention.

The drawings are merely schematic illustrations of the present invention, and the same reference numerals in the drawings denote the same or similar parts, and thus their repeated descriptions will be omitted. Some of the block diagrams shown in the figures do not necessarily necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

The flowcharts shown in the figures are only exemplary illustrations, and do not necessarily include all contents and steps, nor do they have to be performed in the order described. For example, some steps can be decomposed, and some steps can be combined or partially combined, so the actual execution order may be changed according to the actual situation.

A part of the current related video CRBT service can be seen in FIG. 1 .

As shown in FIG. 1, steps S101-S106: the calling terminal sends an initial INVITE message, the Contact header field carried by it contains a video tag, and the Supported header field carried by it contains precondition and 100rel tags, and an initial INVITE message is carried out with the called terminal. Call media negotiation and resource reservation confirmation.

Step S107: The called terminal returns a response message (eg, a 180 response message) of the initial INVITE message.

Step S108: The calling terminal receives the media negotiation message of video CRBT media negotiation sent by the CRBT platform, and completes the CRBT media negotiation.

The CRBT media negotiation process is only used to confirm that the calling terminal has the media playback capability. The media negotiation message may be, for example, a video CRBT media negotiation Update message.

Step S109: The calling terminal replies to the response message according to its own media capability and resource reservation status, and receives the video CRBT audio and video media stream or the audio CRBT audio media stream for playback after the corresponding resource reservation is confirmed.

The reply message may be, for example, a 200Update reply message.

Step S110: The CRBT platform pushes the video CRBT to the calling terminal to play (default voice coding mode 8 (23.85kbps)).

In the above process, the default voice encoding mode cannot meet the requirements of the voice encoding mode of the video CRBT source file, resulting in poor sound playback effect and poor user experience.

Therefore, there is a need for a new session negotiation method, apparatus, electronic device and computer-readable medium.

Fig. 2 is a flowchart of a session negotiation method according to an exemplary embodiment. The session negotiation method provided by the embodiment of the present disclosure may be performed by the calling terminal, and the session negotiation method provided by the embodiment of the present disclosure may include steps S202 to S210.

As shown in FIG. 2, in step S202, initial call media negotiation and resource reservation confirmation are performed with the called terminal.

In this embodiment of the present disclosure, an initial INVITE message may be sent to the CRBT platform for initial call media negotiation and resource reservation confirmation.

In step S204, the media negotiation message sent by the CRBT platform is received to complete the CRBT media negotiation.

In the embodiment of the present disclosure, the media negotiation message may be an Update message, which may be generated by the CRBT platform after receiving the 180 response message returned by the called terminal in response to the initial INVITE message.

In step S206, negotiate with the network to confirm the current voice rate coding mode.

Wherein, the current speech coding mode may be determined through negotiation with the network according to network resource conditions of the network.

In step S208, a response message is sent to the CRBT platform, where the response message includes the current voice rate coding mode.

In the embodiment of the present disclosure, the media capability and resource reservation status of the calling terminal may be confirmed; and the response message may be generated according to the media capability, the resource reservation status, and the current speech rate coding mode. The reply message may be a 200Update reply message.

In step S210, the target audio file returned by the CRBT platform according to the current voice rate encoding mode is received and played.

The target CRBT file is determined from the multiple candidate audio files according to the current voice rate coding mode after the CRBT platform generates multiple candidate audio files according to the multiple candidate voice rate coding modes. Different alternative audio files may be generated according to different alternative speech rate encoding modes.

According to the session negotiation method provided by the embodiment of the present disclosure, after the calling terminal and the called terminal conduct initial call media negotiation and resource reservation confirmation, and after the host terminal and the CRBT platform complete the CRBT media negotiation, the calling terminal also The media state negotiates the current voice rate encoding mode, and carries it in the response message, so that the CRBT platform can return the target audio file that conforms to the current media state of the network according to the current voice rate encoding mode, which improves the playback effect of the audio file during the session.

Fig. 3 is a flow chart of a session negotiation method according to another exemplary embodiment. The session negotiation method provided by the embodiment of the present disclosure may be performed by a CRBT platform, and the session negotiation method provided by the embodiment of the present disclosure may include steps S302 to S306.

As shown in FIG. 3 , in step S302, after the calling terminal and the called terminal perform initial call media negotiation and resource reservation confirmation, a media negotiation message is sent to the calling terminal to complete the CRBT media negotiation.

In step S304, a response message sent by the calling terminal is received, where the response message includes the current voice rate coding mode.

The response message may further include the media capability and resource reservation status of the calling terminal. The current voice rate coding mode may be determined by the calling terminal through negotiation with the network according to the network resource situation of the network.

In step S306, the target audio file is returned to the calling terminal according to the current speech rate encoding mode, so that the calling terminal can play the target audio file.

Wherein, multiple alternative audio files can be generated according to multiple alternative voice rate encoding modes; and the target audio file is determined from the multiple alternative audio files according to the current voice rate encoding mode and returned to the main audio file. called the terminal.

According to the session negotiation method provided by the embodiment of the present disclosure, after the calling terminal and the called terminal conduct initial call media negotiation and resource reservation confirmation, and after the host terminal and the CRBT platform complete the CRBT media negotiation, the calling terminal also The media state negotiates the current voice rate encoding mode, and carries it in the response message, so that the CRBT platform can return the target audio file that conforms to the current media state of the network according to the current voice rate encoding mode, which improves the playback effect of the audio file during the session.

Fig. 4 is a flow chart of a session negotiation method according to yet another exemplary embodiment. The session negotiation method provided by the embodiment of the present disclosure may include steps S401 to S411.

As shown in FIG. 4 , in steps S401-S406, the calling terminal sends an initial INVITE message, the Contact header field carried by it includes the video tag, and the Supported header field carried by it includes the precondition and 100rel tags. Perform initial call media negotiation and resource reservation confirmation.

In step S407, the called terminal returns a 180 response message of the initial INVITE message.

In step S408, the calling terminal receives the media negotiation message of video CRBT media negotiation sent by the CRBT platform, and completes the CRBT media negotiation.

In step S409, the calling terminal negotiates the current voice rate coding mode with the network, and finally negotiates the mode X (X is 0-8).

In step S410, the calling terminal replies to a response message according to its own media capabilities and resource reservation status, and adds the current voice rate coding mode (mode X) successfully negotiated between the calling terminal and the network in the response message, and waits for the corresponding resource reservation. After the confirmation, receive the video CRBT audio and video media stream or the audio CRBT audio media stream for playback.

In step S411, the CRBT platform pushes the video CRBT corresponding to the current voice rate coding mode (mode X) to the calling terminal to play.

Among them, the CRBT platform can simultaneously produce 9 video CRBT source files with voice rate encoding modes 0-8. Further, the corresponding target audio file can be pushed according to the current voice rate encoding mode negotiated between the calling terminal and the network.

According to the session negotiation method provided by the embodiments of the present disclosure, it is solved that when a user is playing a video CRBT, the mobile phone first needs to negotiate with the network to determine the voice coding mode. If the network resources are tight or for other reasons, the voice coding mode may not be negotiated as mode 8. (23.85kbps), at this time, when the video CRBT is played, the voice coding mode negotiated by the mobile phone cannot meet the voice coding mode requirements of the video CRBT source file, and the video CRBT sound playback effect is relatively poor, which effectively improves the user experience.

It should be clearly understood that this disclosure describes how to make and use specific examples and that the principles of this disclosure are not limited to any details of these examples. Rather, these principles can be applied to many other embodiments based on the teachings of the present disclosure.

Those skilled in the art can understand that all or part of the steps for implementing the above embodiments are implemented as computer programs executed by a central processing unit (Central Processing Unit, CPU). When the computer program is executed by the central processing unit CPU, the above-mentioned functions defined by the above-mentioned methods provided by the present disclosure are executed. The program can be stored in a computer-readable storage medium, which can be a read-only memory, a magnetic disk, an optical disk, or the like.

In addition, it should be noted that the above-mentioned drawings are only schematic illustrations of the processes included in the methods according to the exemplary embodiments of the present disclosure, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not indicate or limit the chronological order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, in multiple modules.

The following system embodiments of the present disclosure can be used to execute the method embodiments of the present disclosure. For details not disclosed in the system embodiments of the present disclosure, please refer to the method embodiments of the present disclosure.

Fig. 5 is a block diagram of a session negotiation system according to an exemplary embodiment. Referring to FIG. 5 , the session negotiation system 50 provided by the embodiment of the present disclosure may include: a calling terminal 502 and a CRBT platform 504 .

In the session negotiation apparatus 50, the calling terminal 502 can be used to perform initial call media negotiation and resource reservation confirmation with the called terminal; receive the media negotiation message sent by the CRBT platform to complete the CRBT media negotiation; negotiate with the network to confirm the current voice rate encoding mode; send a response message to the CRBT platform, the response message includes the current voice rate coding mode; receive and play the target audio file returned by the CRBT platform according to the current voice rate coding mode.

The CRBT platform 504 can be configured to send a media negotiation message to the calling terminal after the calling terminal and the called terminal perform initial call media negotiation and resource reservation confirmation; receive a response message sent by the calling terminal; The current speech rate encoding mode returns the target audio file to the calling terminal.

According to the session negotiation apparatus provided by the embodiments of the present disclosure, after the calling terminal and the called terminal perform initial call media negotiation and resource reservation confirmation, and after the host terminal and the CRBT platform complete the CRBT media negotiation, the calling terminal also performs the CRBT media negotiation according to the current network The media state negotiates the current voice rate encoding mode, and carries it in the response message, so that the CRBT platform can return the target audio file that conforms to the current media state of the network according to the current voice rate encoding mode, improving the playback effect of the audio file during the session.

In an exemplary embodiment, the target audio file is that after the CRBT platform 504 generates multiple alternative audio files according to the multiple alternative voice rate encoding modes, the multiple alternative audio files are stored in the multiple alternative audio files according to the current voice rate encoding mode. identified in the file.

In an exemplary embodiment, when the calling terminal 502 sends a response message to the CRBT platform, it can be used to: confirm the media capability and resource reservation status of the calling terminal; according to the media capability, the resource reservation status and the current speech rate encoding mode to generate the reply message.

In an exemplary embodiment, the calling terminal 502 is further configured to negotiate with the network according to the network resource situation of the network to determine the current speech coding mode.

In an exemplary embodiment, when returning the target audio file to the calling terminal according to the current voice rate encoding mode, the CRBT platform 504 may be configured to: generate multiple alternative audio files according to multiple alternative voice rate encoding modes ; determine the target audio file from the multiple candidate audio files according to the current speech rate encoding mode and return to the calling terminal.

In an exemplary embodiment, the response message further includes the media capability and resource reservation status of the calling terminal.

In an exemplary embodiment, the current speech rate coding mode is determined by the calling terminal through negotiation with the network according to network resource conditions of the network.

An electronic device 600 according to this embodiment of the present invention is described below with reference to FIG. 6 . The electronic device 600 shown in FIG. 6 is only an example, and should not impose any limitation on the function and scope of use of the embodiments of the present invention.

As shown in FIG. 6, electronic device 600 takes the form of a general-purpose computing device. Components of the electronic device 600 may include, but are not limited to, the above-mentioned at least one processing unit 610 , the above-mentioned at least one storage unit 620 , and a bus 630 connecting different system components (including the storage unit 620 and the processing unit 610 ).

Wherein, the storage unit stores program codes, and the program codes can be executed by the processing unit 610, so that the processing unit 610 executes various exemplary methods according to the present invention described in the above-mentioned “Exemplary Methods” section of this specification Implementation steps. For example, the processing unit 610 may perform the steps shown in FIG. 2 or FIG. 3 or FIG. 4 .

The storage unit 620 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 6201 and/or a cache storage unit 6202 , and may further include a read only storage unit (ROM) 6203 .

The storage unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, An implementation of a network environment may be included in each or some combination of these examples.

The bus 630 may be representative of one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local area using any of a variety of bus structures bus.

The electronic device 600 may also communicate with one or more external devices 700 (eg, keyboards, pointing devices, Bluetooth devices, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with Any device (eg, router, modem, etc.) that enables the electronic device 600 to communicate with one or more other computing devices. Such communication may occur through input/output (I/O) interface 650 . Also, the electronic device 600 may communicate with one or more networks (eg, a local area network (LAN), a wide area network (WAN), and/or a public network such as the Internet) through a network adapter 660 . As shown, network adapter 660 communicates with other modules of electronic device 600 via bus 630 . It should be appreciated that, although not shown, other hardware and/or software modules may be used in conjunction with electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives and data backup storage systems.

From the description of the above embodiments, those skilled in the art can easily understand that the exemplary embodiments described herein may be implemented by software, or may be implemented by software combined with necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure may be embodied in the form of software products, and the software products may be stored in a non-volatile storage medium (which may be CD-ROM, U disk, mobile hard disk, etc.) or on the network , including several instructions to cause a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to an embodiment of the present disclosure.

In an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium on which a program product capable of implementing the above-described method of the present specification is stored. In some possible implementations, aspects of the present invention can also be implemented in the form of a program product comprising program code for enabling the program product to run on a terminal device The terminal device performs the steps according to various exemplary embodiments of the present invention described in the "Example Method" section above in this specification.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples (non-exhaustive list) of readable storage media include: electrical connections with one or more wires, portable disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

A computer readable signal medium may include a propagated data signal in baseband or as part of a carrier wave with readable program code embodied thereon. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A readable signal medium can also be any readable medium, other than a readable storage medium, that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any suitable medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural Programming Language - such as the "C" language or similar programming language. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server execute on. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (eg, using an Internet service provider business via an Internet connection).

Furthermore, the above-mentioned figures are merely schematic illustrations of the processes included in the methods according to the exemplary embodiments of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not indicate or limit the chronological order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, in multiple modules.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the claims.

Claims (11)

1. A session negotiation method, characterized in that it is performed by a calling terminal, the method comprising: Perform initial call media negotiation and resource reservation confirmation with the called terminal; Receive the media negotiation message sent by the CRBT platform, and complete the CRBT media negotiation; Negotiate with the network to confirm the current voice rate encoding mode; sending a response message to the CRBT platform, where the response message includes the current voice rate coding mode; Receive and play the target audio file returned by the CRBT platform according to the current voice rate encoding mode. 2. method as claimed in claim 1 is characterized in that, described target audio file is that after CRBT platform generates multiple alternative audio files according to multiple alternative voice rate encoding modes, according to the current voice rate encoding mode in determined in the plurality of candidate audio files. 3. The method of claim 1, wherein sending a response message to the CRBT platform comprises: Confirm the media capability and resource reservation status of the calling terminal; The response message is generated according to the media capability, the resource reservation status and the current speech rate coding mode. 4. The method of claim 1, further comprising: The current speech coding mode is determined by negotiating with the network according to the network resource situation of the network. 5. A session negotiation method, characterized in that it is executed by a CRBT platform, the method comprising: After the calling terminal and the called terminal perform initial call media negotiation and resource reservation confirmation, send a media negotiation message to the calling terminal to complete the CRBT media negotiation; receiving a response message sent by the calling terminal, where the response message includes the current voice rate coding mode; Return the target audio file to the calling terminal according to the current speech rate encoding mode, so that the calling terminal can play the target audio file. 6. The method of claim 5, wherein returning a target audio file to the calling terminal according to the current speech rate coding mode comprises: Generate multiple alternative audio files according to multiple alternative speech rate encoding modes; The target audio file is determined from the plurality of candidate audio files according to the current speech rate encoding mode and returned to the calling terminal. 7. The method of claim 5, wherein the response message further includes the media capability and resource reservation status of the calling terminal. 8 . The method according to claim 5 , wherein the current speech rate coding mode is determined by the calling terminal through negotiation with the network according to network resource conditions of the network. 9 . 9. A session negotiation system, comprising: The calling terminal is used for initial call media negotiation and resource reservation confirmation with the called terminal; it receives the media negotiation message sent by the CRBT platform and completes the CRBT media negotiation; negotiates with the network to confirm the current voice rate encoding mode; sends a response to the CRBT platform message, the response message includes the current voice rate encoding mode; receive and play the target audio file returned by the CRBT platform according to the current voice rate encoding mode; The CRBT platform is used to send a media negotiation message to the calling terminal after the calling terminal and the called terminal perform initial call media negotiation and resource reservation confirmation; receive a response message sent by the calling terminal; The current speech rate encoding mode returns the target audio file to the calling terminal. 10. An electronic device, comprising: at least one processor; a storage device for storing at least one program; The at least one program, when executed by the at least one processor, causes the at least one processor to implement the method of any one of claims 1-8. 11. A computer-readable medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the method according to any one of claims 1-8 is implemented.

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