WO2012130023A1

WO2012130023A1 - Method and device for improving voice communication

Info

Publication number: WO2012130023A1
Application number: PCT/CN2012/071981
Authority: WO
Inventors: 嵇家刚
Original assignee: 华为技术有限公司
Priority date: 2011-03-31
Filing date: 2012-03-06
Publication date: 2012-10-04
Also published as: CN102739605A; CN102739605B

Abstract

Provided in an embodiment of the present invention are a method and device for improving voice communication, applied to the communication between a calling user and a called user, the calling user is a high definition user; the method comprises: establishing a call initiated by a calling user to a called user, and performing a tandem free operation (TFO) consultation with an opposite terminal; if judging that the voice encoding/decoding type of the called user is different from that of the calling user and satisfies a set first corresponding relation, then sending a TFO consultation success message to the opposite terminal and switching the voice encoding/decoding type of the calling user to a type that is consistent with the called user type; encoding/decoding the call using the switched voice encoding/decoding type of the calling user and then sending to the opposite terminal; thus the technical problem of TFO consultation failure due to different voice encoding/decoding types of both parties of communication is solved, thereby improving call quality.

Description

Method and device for improving voice communication

The present application claims priority to Chinese Patent Application No. 201110081738.1, entitled "A Method for Improving Voice Communication and Apparatus", filed on March 31, 2011, the entire contents of which is incorporated herein by reference. in. Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for improving voice communication. Background technique

The emergence of broadband voice (ie, high-definition voice) technology optimizes the quality of voice calls. Many companies have been gradually migrating their networks to high-definition voice over IP (VoIP). However, since high-definition VoIP uses wideband audio codec, which is incompatible with the existing connection between the public switched telephone network (PSTN) using narrowband audio coding, this migration is not widely accepted.

At present, in the prior art, the process of talking between high-definition voice users is: if two high-definition voice users talk to each other, because both parties support high-definition voice, the TFO (Tandem Free Operation) negotiation is successful, and the broadband is successful. The voice frame is sent from the calling party. After the TFO frame encapsulation process is performed by the base station controller (BSC, Base Station Controller) on the calling side, the voice frame is transmitted from the calling party's BSC to the called party's BSC, the called party. The BSC obtains a wideband speech frame from the TFO frame, and then transmits the wideband speech frame to the called user. In the prior art, if both ends of the communication support high-definition voice, the TFO negotiation can be successful, that is, the two parties can implement the high-definition voice call. However, if only one end of the communication supports the high-definition voice, the TFO negotiation fails, and the high-definition voice (broadband) Switch to narrow-band pulse code modulation (PCM) to reduce the quality of the call.

In the research and practice of the prior art, the inventors of the present invention have found that in the existing implementation manner, the voice codec type supported by the HD terminal is different from the codec type supported by the non-HD (such as fixed line). When a call is established, TFO negotiation is performed. If the calling party (ie, supporting high-definition voice) and the called party have different voice coding types, the TFO negotiation fails, and the base station controller switches the high-definition voice to the narrowband PCM voice, and the codec Switching will result in a loss of voice quality, which will reduce the quality of the call between the two parties. Summary of the invention

The embodiment of the invention provides a voice communication method and device, which solves the technical problem that the communication parties fail due to different types of voice coding, and improves the call quality.

To solve the above technical problem, an embodiment of the present invention provides a method for improving voice communication, which is applied to a calling user to communicate with a called user, where the calling user is a high-definition user, and the method includes:

Establish a call initiated by the calling user to the called user, and negotiate with the peer to perform a secondary codec-free TFO negotiation;

If it is judged that the voice codec type of the called user and the voice codec type of the calling user are not If the first correspondence is set, the TF0 negotiation is successfully sent to the peer end, and the voice codec type of the calling user is switched to the voice codec type consistent with the called user.

The call is coded and decoded by the switched voice codec type of the calling party and sent to the peer end.

The invention relates to a device for improving voice communication, which is applied to a communication between a calling user and a called user, wherein the calling user is a high-definition user, and the method comprises:

Establishing a unit, configured to establish a call initiated by the calling user to the called user;

a negotiating unit, configured to perform a TFO negotiation with the peer end to perform a secondary codec-free operation after establishing a call by the establishing unit;

The determining unit is configured to: when determining that the voice codec type of the called user is different from the voice codec type of the calling user, and the first correspondence is set, the triggering sending unit sends the TFO negotiation to the peer end, and triggers The switching unit switches the voice codec type of the calling user to a voice codec type consistent with the called user;

a sending unit, configured to send a TFO negotiation to the peer end successfully;

a switching unit, configured to switch a voice codec type of the calling user to a voice codec type consistent with the called user;

The codec unit is configured to encode and decode the call by using the voice codec type of the switched calling party, and then send the call to the peer end.

In the embodiment of the present invention, when the TFO negotiation of the secondary codec-free operation is performed, if the calling party The base station controller finds that the voice codec types of the calling and called parties are inconsistent, and still makes the TFO negotiation successful, and switches the voice codec type to the voice codec type consistent with the called party, so as to avoid switching the voice to narrowband PCM voice. Quality loss. That is to say, the success rate of the TFO negotiation is greatly improved by the voice codec compatible with the narrowband in this embodiment. Further, in the case that the TFO negotiation fails, switching to the narrowband codec reduces the damage of the codec handover to the voice quality, and improves the voice call quality. DRAWINGS

1 is a flowchart of a method for improving voice communication according to an embodiment of the present invention; FIG. 2 is a flowchart of an application example of a method for improving voice communication according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for improving voice communication according to an embodiment of the present invention. detailed description

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

FIG. 1 is a flowchart of a method for improving voice communication according to an embodiment of the present invention. The method is applied to a calling user to communicate with a called user, where the calling user is a high-definition user; Includes:

Step 101: Establish a call initiated by the calling user to the called user, and negotiate with the peer to perform a secondary codec-free TFO negotiation; wherein the peer end may be a base station controller to which the called user belongs. Step 102: If it is determined that the voice codec type of the called user is different from the voice codec type of the calling user, and the first corresponding relationship is met, the TFO negotiation is successfully sent to the peer end, and the voice of the calling user is sent. The codec type is switched to the voice codec type that is consistent with the called user. Step 103: The call code is coded and decoded by the switched caller's voice codec type, and then sent to the peer end.

Preferably, the voice codec type of the calling user is switched to the voice codec type consistent with the called user: the voice code of the calling user is switched to the codec type supported by both the calling user and the called user. The best quality codec type in medium quality. That is to say, switching to the codec type supported by both the calling user and the called user of the voice codec type consistent by the called user, and selecting the best quality codec type from the supported voice coding types, of course, It can be a good quality codec type, which is not limited in this embodiment.

In this embodiment, if it is determined that the voice codec type of the called user is different from the voice codec type of the calling user, and the first correspondence corresponding to the setting is met, the TFO negotiation is successfully sent to the peer end, and The voice codec type of the calling user is switched to the voice codec type consistent with the called user, including:

If the calling user's voice coding type is: EVRC—NW or Enhanced Voice Coding Broadband EVRC WB:

When the voice coding type of the called user is: EVRC_NW, and the EVRC_NW is not exactly the same as the specific voice coding type included in the calling EVRC_NW, then the opposite end The TFO negotiation is successful, and the voice codec type of the calling user is switched to the capability operating point COP of the EVRC-WB;

When the voice coding type of the called user is: enhanced voice coding narrowband EVRC_B, the TFO negotiation is successfully sent to the opposite end, and the voice codec type of the calling user is switched to the capability operation point COP of the EVRC_B. .

The first correspondence is a preset relationship between a calling voice codec type, a called voice codec type, and a negotiation result, where the calling user and the called user are in the first correspondence. At least one of the supported voice codec types is the same.

Preferably, the method may further include: when determining that the voice codec type of the called user is different from the voice codec type of the calling user, and satisfying the set second correspondence, sending a TFO negotiation to the peer end Failed, and switch the calling user's voice codec type to

EVRC-B's capability operation point COP; specifically includes:

If the voice coding type of the calling user is: EVRC—NW or EVRC—WB: When the voice coding type of the called user is: EVRC; then the TFO negotiation fails to be sent to the opposite end, and the voice of the calling user is edited. The decoding type is switched to the COP of EVRC-B;

When the voice coding type of the called user is: public switched telephone network PSTN; the TFO negotiation result is sent to the opposite end as follows: TFO negotiation fails, and the voice codec type of the calling user is switched to the COP of EVRC_B .

The second correspondence relationship is a preset caller codec type and a called party. Correspondence between the type of tone codec and the result of the negotiation. In the second correspondence, the types of voice codecs supported by the calling user and the called user are not the same.

Preferably, the method may further include: setting a voice codec type of the calling user, a first correspondence relationship between the voice codec type of the called user and the TFO negotiation result, and a second correspondence relationship; A correspondence and a second correspondence are stored on the base station controller.

Preferably, when it is determined that the voice codec type of the called user is different from the voice codec type of the calling user, and the first correspondence or the second correspondence is set, the method may further include: querying The correspondence between the voice codec type of the calling user, the voice codec type of the called user, and the TFO negotiation result, and the negotiation result that the TFO negotiation succeeds or the TFO negotiation fails.

In the embodiment of the present invention, when performing the TFO negotiation of the secondary codec-free operation, if the calling base station controller finds that the voice codec types of the calling and called parties are inconsistent, the TFO negotiation is still successful, and the calling party's voice is obtained. The codec type is switched to the voice codec type consistent with the called party, avoiding the quality loss caused by switching the voice to narrowband PCM voice. That is to say, the speech encoding and decoding compatible with the narrowband in this embodiment greatly improves the success rate of the TFO negotiation.

Further, in the case that the TFO negotiation fails, switching to the narrowband codec reduces the damage to the voice quality caused by the codec handover, and improves the voice call quality.

In order to facilitate the understanding of those skilled in the art, the following description will be made with specific embodiments. FIG. 2 is a flowchart of an application example of a method for improving voice communication according to an embodiment of the present invention, including:

Step 201: The calling user's voice codec type is EVRC-NW user initiates a call; Step 202: After the calling base station controller receives the call, it performs TFO negotiation with the called base station controller;

Step 203: The base station controller of the calling party determines whether the voice codec type of the called user is the same as the voice codec type of the calling party. If not, perform step 204; if they are the same, perform the steps.

205;

Step 204: If the voice codec type of the called user is EVRC_WB, the TFO negotiation is successful, and the voice of the calling user is coded and decoded by the EVRC-WB and sent to the called base station controller;

If the voice codec type of the called user is EVRC_B, the TFO negotiation is successful, and the voice of the calling user is coded and decoded by the EVRC-B and sent to the called base station controller;

If the called user's voice codec type is EVRC_NW, and the specific voice coding type included in the EVRC_NW is not exactly the same as the specific voice coding type included in the calling EVRC-NW, the TFO negotiation is successful, using EVRC-NW The code of the calling user is coded and sent to the called base station controller;

If the called user's voice codec type is EVRC, the TFO negotiation fails, and the EVRC-B is used to encode and decode the voice of the calling user and then send it to the called base station controller; If the voice codec type of the called user is PSTN, the TFO negotiation fails, and the voice of the calling user is coded and decoded by the EVRC-B and sent to the called base station controller;

Step 205: If the voice codec type of the called user is also EVRC_NW, the TFO negotiation is successful, and the voice of the calling user is coded and decoded by using the EVRC-WB capability operation point COP, and then sent to the called base station controller;

Step 206: The called base station controller decodes the received voice, acquires a broadband voice frame, and sends the broadband voice frame to the called user.

Step 207: The calling user and the called user make a call.

In this embodiment, the voice codec type of the calling party, the type of the voice codec of the called party, and the result of the negotiation are as shown in Table 1,

Table 1

Calling voice codec type Called voice codec type Negotiation result

EVRC-丽EV-NW, and the TFO negotiation is successful, so that

EVRC—NW and calling EVRC—WB EVRC—NW includes COP body speech coding type incomplete

the same

EVRC-丽EVRC-B TFO negotiated successfully, using COP of EVRC-B EVRC-丽EVRC-called TFO negotiation success, using EVRC-WB COP

EVRC-Li EVRC TFO negotiation failed, using EVRC - Β COP

EVRC-Li PSTN TFO negotiation failed, the caller used EVRC-B COP

The implementation process of this embodiment is similar to that of Embodiment 1, except that the calling party's voice codec type is EVRC-WB, and is different from the called voice coding type, and is different according to the called voice codec type. The results of the consultation are shown in Table 2: Table 2

The EVRC WB PSTN TFO negotiation fails. The caller uses the COP of the EVRC-B. In this embodiment, if the calling base station controller finds that the voice codec types of the calling and called parties are inconsistent, the TFO negotiation is still successful, and the voice codec is decoded. The type is switched to the voice codec type consistent with the called party, avoiding the quality loss caused by switching the voice to narrowband PCM voice. And in the case of TFO negotiation failure, switching to the narrowband speech codec EVRC-B reduces the damage of the codec switching to the voice quality.

Based on the implementation process of the foregoing embodiment, the embodiment of the present invention further provides an apparatus for improving voice communication, and a schematic structural diagram thereof is shown in FIG. 3. The device is applied to a calling user to communicate with a called user, where the calling user For a high-definition user, the device includes: an establishing unit 31, a negotiating unit 32, a determining unit 33, a transmitting unit 34, a switching unit 35, and a codec unit 36, wherein the establishing unit 31 is configured to establish a calling user to be Calling the user-initiated call; the negotiating unit 32 is configured to perform a TFO-free negotiation with the peer end after the establishing unit establishes the call; the determining unit 33 is configured to determine the voice of the called user. When the decoding type is different from the voice codec type of the calling user, and the first correspondence is set, the trigger sending unit 34 sends the TFO negotiation to the opposite end, and triggers the switching unit 35 to change the voice encoding and decoding type of the calling user. Switching to a voice codec type consistent with the called user; the sending unit 34, configured to send a TFO negotiation to the peer end successfully; the switching unit 35, configured to After codec unit 36 for switching use; audio codec is switched to the same type of voice codec called user type The voice codec type of the calling user encodes and decodes the call and sends it to the peer.

Preferably, the switching unit 35 switches the voice codec type of the calling user to the voice codec type consistent with the called user: switching the voice codec type of the calling user to the calling user and the called user. The best quality codec type among the supported codec types.

Preferably, the determining unit 33 is further configured to: when determining that the voice codec type of the called user is different from the voice codec type of the calling user, and satisfying the set second correspondence, triggering the sending unit to the opposite end The sending TFO negotiation fails, and triggers the switching unit to switch the voice codec type of the calling user to the capability operating point COP of the EVRC_B;

The sending unit 34 is further configured to send a TFO negotiation failure to the peer end;

The switching unit 35 is further configured to switch the voice codec type of the calling user to the capability operating point COP of the EVRC-B.

In this embodiment, when the calling party's voice codec type is EVRC_NW or EVRC-WB, the called voice codec type is EVRC_NW, and the EVRC_NW and the calling EVRC_NW are included. The specific voice coding type is not exactly the same, EVRC-B, EVRC or PSTN, etc., satisfying the first correspondence; when the calling party's voice codec type is EVRC-NW or EVRC-WB, the called voice codec type is EVRC , EVRC-B or PSTN, satisfying the second correspondence.

Preferably, the apparatus may further include: a storage unit, configured to store a voice codec type of the calling user, a voice codec type of the called user, and a first pair of TFO negotiation results. It should be noted that, in the first correspondence, at least one of the voice codec types supported by the calling user and the called user is the same; and/or the voice codec type of the calling user and the voice codec of the called user are stored. A second correspondence between the type and the TFO negotiation result, wherein, in the second correspondence, the voice codec types supported by the calling user and the called user are not the same.

Preferably, the apparatus may further include: a query unit, configured to determine that the voice codec type of the called user is different from the voice codec type of the calling user, and meet the set first correspondence or the second In the corresponding relationship, the correspondence between the voice codec type of the calling user, the voice codec type of the called user, and the TFO negotiation result is queried, and the negotiation result of the TFO negotiation success or the TFO negotiation failure is obtained.

Preferably, the device may be a base station controller, or may be integrated in the base station controller of the calling party, or may be integrated in the called base station controller, or may be independently deployed in the network, and this embodiment does not do limit.

In the embodiment of the present invention, when performing the TFO negotiation of the secondary codec-free operation, if the calling base station controller finds that the voice codec types of the calling and called parties are inconsistent, the TFO negotiation is still successful, and the voice codec type is switched. For the type of speech codec that is consistent with the called party, avoid the quality loss caused by switching the voice to narrowband PCM voice. That is to say, the success rate of the TFO negotiation is greatly improved by the voice codec compatible with the narrowband in this embodiment. Further, in the case that the TFO negotiation fails, switching to the narrowband codec reduces the damage of the codec handover to the voice quality, and improves the voice call quality. It should also be noted that, in this context, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying such entities or operations. There is any such actual relationship or order between them. Furthermore, the terms "including", "comprising" or "comprising" or "comprising" are intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that includes a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional elements in the process, method, article, or device that comprises the element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make some improvements without departing from the principles of the present invention. And retouching, these improvements and retouchings should also be considered as protection scope of the present invention.

Claims

Rights request

A method for improving voice communication, which is applied to a communication between a calling user and a called user, wherein the calling user is a high-definition user, and the method includes:

If it is determined that the voice codec type of the called user is different from the voice codec type of the calling user, and the first correspondence corresponding to the setting is satisfied, the TFO negotiation is successfully sent to the peer end, and the voice code of the calling user is coded and decoded. The type is switched to the voice codec type consistent with the called user;

The call is coded and decoded by the switched party's voice codec type and sent to the peer.

2. The method according to claim 1, wherein the switching the voice codec type of the calling user to the voice codec type consistent with the called user is: switching the voice code of the calling user to the master The best quality codec type among the codec types supported by both the user and the called user.

The method according to claim 1 or 2, wherein the determining that the called user's voice codec type is different from the calling user's voice codec type, and satisfying the set first correspondence relationship, The TFO negotiation is successfully sent to the peer end, and the voice codec type of the calling user is switched to the voice codec type consistent with the called user, including:

If the calling user's voice coding type is: EVRC NW or enhanced voice coding broadband EVRC - said:

When the voice coding type of the called user is: EVRC_NW, and the voice coding type included in the EVRC_NW of the calling party is not exactly the same, the TFO negotiation is successfully sent to the opposite end, and Switching the voice codec type of the calling user to the capability operating point COP of the EVRC-WB;

The method according to claim 1, wherein the method further comprises: determining that the type of the voice codec of the called user is different from the type of the voice codec of the calling user, and satisfying the second corresponding setting In the case of a relationship, the TFO negotiation failure is sent to the opposite end, and the voice codec type of the calling user is switched to the capability operating point COP of the EVRC-B.

The method according to claim 4, wherein when determining that the type of the speech codec of the called user is different from the type of the speech codec of the calling user, and satisfying the set second correspondence, The peer sends a TFO negotiation failure, and switches the calling user's voice codec type to the EVRC-B capability operating point COP, including:

If the voice coding type of the calling user is: EVRC—NW or EVRC—WB: When the voice coding type of the called user is: EVRC; then the TFO negotiation fails to be sent to the opposite end, and the voice of the calling user is edited. The decoding type is switched to the COP of EVRC-B; When the voice coding type of the called user is: public switched telephone network PSTN; the TFO negotiation result is sent to the opposite end as follows: TFO negotiation fails, and the voice codec type of the calling user is switched to the COP of EVRC_B .

The method according to any one of claims 1 to 3, further comprising:

The first correspondence between the voice codec type of the calling user, the voice codec type of the called user, and the TFO negotiation result, where the voice code supported by the calling user and the called user is included in the first correspondence The decoding type has at least one of the same.

The method according to any one of claims 1 to 5, wherein the method further comprises:

The second corresponding relationship between the voice codec type of the calling user, the voice codec type of the called user, and the TFO negotiation result, where the voice code supported by the calling user and the called user is stored in the second correspondence The decoding types are not the same.

A device for improving voice communication, which is applied to a communication between a calling user and a called user, wherein the calling user is a high-definition user, and the method includes:

a determining unit, configured to determine a voice codec type of the called user and a voice of the calling user When the codec type is different and the first correspondence is set, the trigger sending unit sends the TFO negotiation to the peer end successfully, and triggers the switching unit to switch the voice codec type of the calling user to the voice code consistent with the called user. Decoding type;

The codec unit is configured to encode and decode the call by using the voice coding type of the switched calling party, and then send the call to the opposite end.

The device according to claim 8, wherein the switching unit switches the voice codec type of the calling user to a voice codec type consistent with the called user: encoding and decoding the voice of the calling user Type switching is the best quality codec type among the codec types supported by both the calling user and the called user.

10. Apparatus according to claim 8 wherein:

The determining unit is further configured to: when determining that the voice codec type of the called user is different from the voice codec type of the calling user, and satisfying the set second correspondence, the trigger sending unit sends the TFO negotiation failure to the peer end. And triggering the switching unit to switch the voice codec type of the calling user to the capability operating point COP of the EVRC_B;

The sending unit is further configured to send a TFO negotiation failure to the peer end;

The switching unit is further configured to switch the voice codec type of the calling user to EVRC-B The ability to operate point COP.

The device according to any one of claims 8 to 10, further comprising: a storage unit, configured to store a voice codec type of the calling user, a voice codec type of the called user, and a TFO negotiation result. a first correspondence relationship, wherein, in the first correspondence, at least one of a voice codec type supported by the calling user and the called user is the same; and/or, for storing a voice codec type of the calling user And a first correspondence relationship between the voice codec type of the called user and the TFO negotiation result, and a second correspondence relationship, wherein in the second correspondence relationship, the voice codec type supported by the calling user and the called user is not one. the same.