Information Technology and Computer Application Engineering – Liu, Sung & Yao (Eds)
© 2014 Taylor & Francis Group, London, ISBN 978-1-138-00079-7
Research and realization of a hardware eliminating echo
technology on building talkback system
S.H. Tong
College of Computer, Chongqing College of Electronic Engineering, Chongqing, China
ABSTRACT: This paper researches a hardware eliminating echo technology, which applied to audio and
video transmission system in building talkback. Echo Cancellation chip 34801 is added to the audio and video
transmission circuit. A reasonable power amplifier circuit is designed in its external. Both the filtered echo, but
also to ensure the quality of the audio signal transmission. The design method is simple and practical, ...