Echo cancellation method for set element affine projection of deviation compensation

Abstract

The invention relates to an echo cancellation technology, and belongs to the field of telephone communication. The invention discloses an echo cancellation method for set element radiation projectionof deviation compensation, and solves the problems that a traditional echo cancellation algorithm is relatively high in algorithm complexity, and echo cancellation has deviation when noise is mixed inan input signal. According to the method, the deviation compensation vector at the current moment is calculated, and the compensation vector is used as a subtraction term when the weight coefficientvector is updated. When the weight coefficient vector is relatively large, the subtraction value is relatively large, so that a faster initial convergence speed is obtained; and the subtraction valueis reduced when the tap weight coefficient approaches a steady state, so that the updating speed of the tap weight coefficient is correspondingly reduced when the tap weight coefficient approaches thesteady state, and better stability is kept.

Description

technical field [0001] The invention relates to an echo canceling technology, in particular to an echo canceling method of a deviation-compensated set-element radiation projection, which belongs to the field of telephone communication. Background technique [0002] In the real-time communication system, real-time voice communication between two or more parties is required. The echo in the process of real-time voice communication is a major problem that interferes with the call. For example, during a phone call, if you hear your own voice from the receiver, it means that an echo is generated in the communication process. [0003] At present, with the opening of many kinds of multi-functional communication services, echo problems will inevitably appear in any occasions that need to use speakers and microphones at the same time, such as hands-free phone systems, IP phones, video conference systems and voice control systems. The human ear is extremely sensitive to echoes. Durin...

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to propose a deviation-compensated set-element radial projection echo cancellation method to solve the problem of high algorithm complexity in the traditional echo cancellation algorithm and the deviation of echo cancellation when the input signal is mixed with noise

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