Current Result Document :
| 한글제목(Korean Title) |
ACOUSTIC ECHO CANCELLER FOR A MOBILE HANDSET |
| 영문제목(English Title) |
ACOUSTIC ECHO CANCELLER FOR A MOBILE HANDSET |
| 저자(Author) |
Hong-Seok Kwon
Si-Ho Kim
Byung-Wook Jang
Keun-Sung Bae
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| 원문수록처(Citation) |
VOL 12 NO. 01 PP. 5F ~ 0003 (2002. 04) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
In this paper, we implement an acoustic echo canceller (AEC) running in real-time using the TeakLite DSP core, which will be placed in the vocoder chip of a mobile handset. Considering the limited computational capacity given to the echo canceller part in a vocoder chip, we employ an FIR-type filter with the conventional NLMS (Normalized Least Mean Square) algorithm for adaptation of filter coefficients. We program and optimize the system in the assembler level to make it run in real-time. The implemented echo canceller has 624 words of program memory and 811 words of data memory. With 8 kHz sampling rate and 256 filter taps in the echo canceller that corresponds to 32 milliseconds of echo delay, it requires 14.12 MIPS of computational loads. |
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