Method and device for improving speech communication
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A voice communication and voice technology, applied in the field of communication, can solve problems such as TFO negotiation failure, and achieve the effects of avoiding quality loss, improving success rate, and reducing damage
Active Publication Date: 2012-10-17
HUAWEI TECH CO LTD
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[0006] The embodiment of the present invention provides a voice communication method and device to solve the technical problem of TFO negotiation failure caused by the different types of voice coding between the communication parties, and to improve the call quality
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Embodiment 1
[0044] see also figure 2 , which is a flow chart of an application example of a method for improving voice communication provided in an embodiment of the present invention, including:
[0045] Step 201: the calling user whose voice codec type is EVRC_NW initiates a call;
[0046] Step 202: After receiving the call, the calling base station controller performs TFO negotiation with the called base station controller;
[0047] Step 203: the base station controller of the calling judges whether the voice codec type of the called user is the same as the voice codec type of the calling party, if not, execute step 204; if identical, execute step 205;
[0048] Step 204: If the voice codec type of the called user is EVRC_WB, then the TFO negotiation is successful, and the voice of the calling user is coded using EVRC_WB and sent to the called base station controller;
[0049] If the voice codec type of the called user is EVRC_B, the TFO negotiation is successful, use EVRC_B to code ...
Embodiment 2
[0061] The implementation process of this embodiment is similar to that of Embodiment 1, the difference being that: the voice codec type of the calling party is EVRC_WB, and it is different from the voice codec type of the called party, and is different according to the voice codec type of the called party. The results of the negotiation are shown in Table 2:
[0062] Table 2
[0063]
[0064]
[0065] In this embodiment, if the base station controller of the calling party finds that the voice codec types of the calling party and the called party are inconsistent, the TFO negotiation is still successful, and the voice codec type is switched to the voice codec type consistent with the called party to avoid Quality loss caused by switching voice to narrowband PCM voice. And when the TFO negotiation fails, switch to the narrowband voice codec EVRC_B, which reduces the damage to the voice quality caused by codec switching.
[0066] Based on the realization process of the a...
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Abstract
The embodiment of the invention provides a method and a device for improving speech communication. The method and the device are applied to communication between a calling party and a called party, wherein the calling party is a high definition user. The method comprises the following steps: a call that the calling party initiates to the called party is established and a tandem free operation (TFO) negotiation with an opposite terminal is made; the TFO negotiation is sent successfully to the opposite terminal and the speech coding and decoding type of the calling party is switched into one consistent with that of the called party if it is judged that speech coding and decoding type of the called party is different from that of the calling party and a set first correspondence is satisfied; and the call is coded and decoded by using the switched speech coding and decoding type of the calling party and the coded and decoded call is sent to the opposite terminal. The method and the device aim to solve the technical problem of TFO negotiation failure caused by the difference between speech coding and decoding types of both communicating parties and improve communication quality.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for improving voice communication. Background technique [0002] The emergence of wideband voice (that is, high-definition voice) technology has optimized the quality of voice calls. Many enterprises have been gradually migrating their networks to high-definition voice over IP (VoIP, Voice over IP). However, since high-definition VoIP adopts wideband audio codec, it is not compatible with the connection between the existing PSTN (Public Switched Telephone Network) which adopts narrowband audio codec, so this migration cannot be widely accepted. [0003] At present, in the prior art, the call process between HD voice users is as follows: if two HD voice users talk to each other, because both parties support HD voice, the TFO (TandemFree Operation) negotiation is successful, and the wideband voice The frame is sent from the calling party, and after the b...
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Application Information
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