参数资料
型号: AC300030
厂商: Microchip Technology
文件页数: 38/64页
文件大小: 0K
描述: KIT ACOUSTIC ACCESSORY
标准包装: 1
附件类型: 配件套件
适用于相关产品: 杂讯抑制/回声消除库
dsPIC ? DSC Acoustic Echo Cancellation Library User’s Guide
4.6
RESOURCE REQUIREMENTS
The AEC library requires the following resources while running on the dsPIC DSC
device.
TABLE 4-1:
PROGRAM MEMORY USAGE
Type
Code in Program Memory
Tables in Program Memory
Total Program Memory
Size (bytes)
6810 (dsPIC30F/dsPIC33F)
7032 (dsPIC33E)
2154 (dsPIC30F/dsPIC33F)
0 (dsPIC33E)
8964 (dsPIC30F/dsPIC33F)
7032 (dsPIC33E)
Section
.libec
.const
TABLE 4-2:
DATA MEMORY USAGE (64 ms ECHO TAIL LENGTH)
Function
ecStateMemX
scratchMemX
scratchMemY
nearEndIn
farEndIn
Tables in Data Memory
Size (bytes)
2240
1504
1184
160
160
0 (dsPIC30F/dsPIC33F)
Alignment
2
2
2
2
2
2
Section
X data memory
X data memory
Y data memory
X or Y data memory
X or Y data memory
X data memory
1436 (dsPIC33E)
Total Data Memory
5248 (dsPIC30F/dsPIC33F)
6684 (dsPIC33E)
TABLE 4-3:
ESTIMATED DYNAMIC MEMORY USAGE
Heap
Stack
Section
Size (bytes)
0
< 300
TABLE 4-4:
COMPUTATIONAL SPEED
Function
EC_init()
EC_apply() + EC_applyNlP()
EC_apply() + EC_applyNlP()
EC_apply() + EC_applyNlP()
EC_apply() + EC_applyNlP()
EC_apply() + EC_applyNlP()
All other functions
Echo Tail
All
8
16
32
64
128
All
MIPS
< 0.5
3
5
8
14
27
Minimal
Typical Call Frequency
Once
10 ms
10 ms
10 ms
10 ms
10 ms
As required
Note:
4.6.1
Enabling the Howling Control feature requires an additional 8 MIPS.
Data Format
The data type of nearEndIn and farEndIn can be 10-bit, 12-bit or 16-bit linear PCM
data. The AEC algorithm automatically adjusts for the data format used.
DS70134F-page 38
? 2004-2011 Microchip Technology Inc.
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