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Telephone conference voice mixing method

A sound mixing and sound technology, which is applied in the field of sound mixing to improve voice quality in conference calls, can solve problems such as sound noise and voice quality degradation, and achieve the effect of improving sound mixing effects and voice quality

Inactive Publication Date: 2006-11-08
HUAWEI TECH CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: when the channel numbers with the loudest volume and the next loudest volume change in adjacent time periods, obvious noises appear in the sound due to the direct switching of the mixing data, so that the voice quality drops

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Embodiment Construction

[0025] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0026] see image 3 , using the original mixing method, the mixed sound data obtained in the first time period is: MixOut(n)=A(n)+B(n); the mixed sound data obtained in the second time period is: MixOut(n )=B(n)+C(n); due to the transition from time period 1 to time period 2, the mixing data is directly switched, which is easy to generate noise; the present invention attempts to smooth two Data in adjacent time periods improves the sound mixing effect. Mixing method of the present invention sees Figure 4a , Figure 4b , also set a fixed time period, first calculate the time domain energy of each participant in the fixed time period, and determine the channel with the largest volume and the second largest channel in each time period; after that, in the current time period, based on the above The sounds of the largest channel and the second largest chan...

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Abstract

A teleconference sound mixing method includes A, configuring one fixed time section, calculating each attend a meeting side time domain energy in fixed time section, judging maximum sound side and sub-maximum side; B, in current time section previous time section maximum sound side and sub-maximum side to make sound mixing, to obtain first sound mixing data, and according to current time section maximum sound side sub-maximum side to make sound mixing, to obtain second sound mixing data; C, dividing fixed time section into sound mixing zone smooth zone; in current time section sound mixing zone, sound mixing result being first sound mixing data or second sound mixing data; but in current time section smooth zone, first sound mixing data descent along with time, second sound mixing data increasing along with time, sound mixing result formed by first and second sound mixing data superposition. Said method makes adjacent time section different sound mixing data capable of smooth transition, improving sound mixing effect.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a sound mixing method for improving voice quality in a conference call. Background technique [0002] Conference calls often involve multi-party calls, and the most common thing we see is two-party audio mixing. For example, A, B, C, and D participate in a conference call at the same time. If A and B speak together, C and D will hear the voices of A and B at the same time. The network diagram is as follows figure 1 shown. When our equipment is processing a conference call, it first judges who has the loudest voice and whose voice is the second loudest in the conference, and then superimposes the loudest and second loudest voices and sends them to other people who have not spoken or who have a low voice Participants have basically realized the conference call function; and the operation of superimposing sounds together is sound mixing, and the sound mixing method directly ...

Claims

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Application Information

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IPC IPC(8): H04M3/56
Inventor 朱祥文吴宗武
Owner HUAWEI TECH CO LTD
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