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AN4229 数据表(PDF) 9 Page - STMicroelectronics

部件名 AN4229
功能描述  How to implement a vocoder solution using STM32 microcontrollers
PDF  26 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN4229 数据表(HTML) 9 Page - STMicroelectronics

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AN4229
Vocoder overview and comparison
25
Table 4. G.726 decoder performance
Parameter (1)
1. Bitrate: 32 Kbits/s
G.726 Decoder
µ-law
A-law
PCM
Flash memory (bytes)
2026
2018
1604
RAM (bytes)
144
144
144
Load (MHz)
18.06
17.55
11.76
Table 5. IMA-ADPCM performance
Parameter
IMA-ADPCM encoder
IMA-ADPCM decoder
Flash memory (bytes)
416
416
RAM (bytes)
16
16
Load (MHz)
0.62
0.51
Table 6. Speex encoder performance
Quality (1)
1. Complexity = 1
Load (MHz)
Narrowband
Wideband
1
40.8
53.4
2
33.6
46.2
3
37.2
49.8
4
37.2
64.2
5
52.2
56.4
6
52.2
70.2
7
44.4
98.4
8
44.4
114
9
72.6
100.8
10
59.4
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