Acoustic-Echo Canceller for a Full-Duplex Hands-Free Mobile Phone Motorola Incorporated Digital Signal Processing Operations Austin, TX

Format:

Conference/Event

Author/Creator:

Park, Sangil, author.

Conference Name:

International Congress & Exposition (1991-02-25 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1991

Summary:

This paper discusses a real-time implementation of an adaptive acoustic echo canceler for a hands-free cellular (mobile) phone operating inside a car. A 512-tap adaptive-finite-impulse-response (AFIR) filter, which is the implementation of the adaptive least-mean-square (LMS) algorithm with tapped-delay-line (TDL) structure, is utilized for the acoustic echo canceller. A simple double-talk detection algorithm and the normalized convergence parameter for the LMS algorithm are discussed and implemented on the DSP56001, which is also used as a host processor for the DSP56200s, A/D and D/A converters. DSP56001 assembly codes are included as well as experimental results and the schematic diagram for the hardware implementation

Notes:

Vendor supplied data

Publisher Number:

910789

Access Restriction:

Restricted for use by site license