参数资料
型号: AC163020
厂商: Microchip Technology
文件页数: 26/152页
文件大小: 0K
描述: ADAPTER PROGRAMMER PIC10F2XX
标准包装: 1
模块/板类型: DIP 插座模块
适用于相关产品: 基准闪存微型控制器编程器
产品目录页面: 658 (CN2011-ZH PDF)
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Development Systems Ordering Guide
NEW
dsPIC30F Speech Encoding/Decoding Library
The dsPIC30F Speech Encoding/Decoding Library
performs toll-quality voice compression and voice
decompression. The library is based on a modified
version of Speex source code and features a 16:1
compression ratio. It samples speech at 8 kHz and
compresses it to a rate of 8 kbps. Storing compressed
speech for playback requires approximately 1 Kbyte of
memory for each second of speech.
Features
Key features of the library include:
? Fixed 8 kHz sample rate
? Fixed 8 kbps output rate
? PESQ-based Mean Opinion Score: 3.7-4.2 (out of 5.0)
? Code Excited Linear Prediction (CELP)-based coding
? Two analog input interfaces – codec or on-chip
12-bit ADC
? Two analog output interfaces – codec or
on-chip PWM
? Optional Voice Activity Detection
? Playback-only applications will benefit from the
Speech Encoder Utility. It allows you to make
encoded speech files from your desktop using a PC
microphone or WAV file
? Storing compressed speech requires 1 KB of
memory per second of speech
? Off-chip support for playback of long speech samples
? Royalty free (only one-time license fee)
? Full compliance with Microchip MPLAB ? C30
C Compiler Tools
? “dsPIC30F Speech Encoding/Decoding Library
User ’s Guide” (DS70154) is provided to help the user
understand and use the library
? Designed to run on dsPICDEM? 1.1 Demonstration
Board (DM300014)
Ordering Information:
Resource Requirements
Decoder:
Playback Interface: Si-3000 Audio codec or PWM
Computational Power: 3 MIPS
Program Flash Memory: 15 KB
RAM*: 3.2 KB
Encoder:
Sampling Interface: Si-3000 Audio codec or 12-bit ADC
Computational Power: 19 MIPS (worst case)
Program Flash Memory: 33 KB
RAM*: 5.4 KB (1.2 KB is scratch)
* Full-duplex support is presently not possible due to RAM requirements,
but support will be provided with future devices. Half-duplex support is
now possible and requires 6.8 KB of RAM.
SW300070-EVAL
SW300070-5K
SW300070-25K
SW300070-100K
DS70146
DS30177T-page 20
dsPIC30F Speech Encoder/Decoder Library Software License (Evaluation Only)
dsPIC30F Speech Encoder/Decoder Library Software License (Up to 5K units)
dsPIC30F Speech Encoder/Decoder Library Software License (Up to 25K units)
dsPIC30F Speech Encoder/Decoder Library Software License (Up to 100K units)
“dsPIC30F Speech Encoding/Decoding Library Product Overview”
? 2005 Microchip Technology Inc.
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