acoustic echo cancellation

The so-called acoustic echo cancellation is to solve the problem of VoIP (Internet telephony), that is, A and B calls, a-side microphone and speakers are used to collect a sound and play B sound, B-side microphone and speakers are used to collect the sound of B and play a sound, it is obvious, due to the characteristics of sound propagation , a end of the microph

The AEC echo suppression algorithm is difficult. Currently, directsound can be used for processing, but it can only be used in xp. It is not supported by other systems!Currently, gips has excellent implementations of this algorithm. Skype is the engine used!It may be difficult to implement it on your own! The AEC module is part of the underlying structure of Microsoft directsound. This component includes the following features and restrictions: The AE

the mystery of echo cancellation technology. Second, the principle of echo cancellation from the source of communication echoes, can be divided into acoustic echo (acoustic

technology? second, the principle of echo eliminationFrom the reason of communication echo, can be divided into acoustic echo (acoustic echo) and line echo (lines

First, prefaceto understand echo cancellation technology, we have to mention the theory of digital signal processing as the theoretical basis of modern communication technology. First of all, there is an important branch of the digital signal processing theory, called adaptive Signal Processing, and in the classical textbook, the echo elimination problem has alwa

Acoustic echo refers to the sound that the speaker plays out and sends back to the far end when the microphone is picked up, allowing the remote interlocutor to hear his or her voice. Acoustic echoes are also divided into direct echoes and indirect echoes. Direct echo refers to the speaker playing out the sound without

. 　　 II. structure and correlation algorithm of acoustic echo CancellerWith the development of ECHO-eliminating technology, the focus of the current study of ECHO cancellation has been shifted from "Circuit echo" to "

= audiorecord.getminbuffersize (8000, Audioformat.channel_in_mono, Audioformat.encoding_pcm_16bit); 2.Android echo Cancellation There are probably two types of echo cancellation on the Internet: 1. The audio is automatically removed from the voice_communication mode of Android. 2. Use third-party librarie

Abstract: Today, with the development of chip technology and high-bandwidth communications, developers are able to make a fuss about a more superior voice-calling experience, while the demand for hands-free calls is getting higher on the market. However, hands-free communication systems often need to be able to cope with various disturbances. One of the interferences that cannot be overlooked is acoustic echo