参数资料
型号: CS6403
厂商: Cirrus Logic, Inc.
元件分类: Codec
英文描述: Echo-Cancelling Codec
中文描述: 回声取消编解码器
文件页数: 20/54页
文件大小: 761K
代理商: CS6403
Register SSI_CR0 (cont.)
BIT
NAME
VALUE
FUNCTION
GBC1
GBC0-
Graded-Beta Count
Graded-Beta Count - These bits control the rate at
which the update gain decays in the AEC as the
adaptive-filter taps are updated in a particular
sample time. For each setting below, some
number of taps are processed, after which the
update gain is divided by two. The possible
settings are given below:
Taps Processed
00
01
10
11
R
512
64
128
256
Equivalent path-decay rate
0 dB/ms
0.75 dB/ms
0.38 dB/ms
0.19 dB/ms
AECB1
AECB0
AEC Beta
These bits scale the adaptive filter update gain that
is present at the start of each sample time.
Update Gain
00
01
10
11
R
0.25
0.5
1.0
2.0
"R" indicates value after Reset
Recommended settings for D3-D0:
0001
0111
--No graded beta
--"dead" room/car;
0.75 dB/ms path decay
--medium room; (default)
0.28 dB/ms path decay
--large (or "live") room;
0.19 dB/ms decay
1010
1100
CS6403
20
DS192PP6
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