Telephone
共 66 篇文章
Telephone 相关的电子技术资料，包括技术文档、应用笔记、电路设计、代码示例等，共 66 篇文章，持续更新中。
英文书籍
英文书籍，Introduction.to.Mobile.Telephone.Systems.1G.2G.2.5G.and.3G.Wireless.Technologies.and.Services
Introduction To Mobile Telephone Systems: 1G, 2G, 2.5G, and 3G Wireless Technologies and Services
Introduction To Mobile Telephone Systems: 1G, 2G, 2.5G, and 3G Wireless Technologies and Services
嵌入式LINUX 电子教程全集
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<strong>嵌入式LINUX 电子教程全集</strong></p>
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嵌入式系统出现于60年代晚期，它最初被用于控制机电电话交换机，如今已被广泛的应用于工业制造、过程控制、通讯、仪器、仪表、汽车、船舶、航空、航天、军事装备、消费类产品等众多领域。计算机系统核心CPU，每年在全球范围内的产量大概在二十亿颗左右，其中超过80％应用于各类专用性很强的嵌入式系统。一般的
基于码本映射的语音带宽扩展算法研究
在现代通信系统中，电话语音的频带被限制在300 Hz～4 kHz的范围内，带来了语音可懂度和自然度的降低。为了在不增加额外成本的前提下提高语音的可懂度和自然度，进行了电话语音频带扩展的研究。提出了一种改进的基于码本映射的语音带宽扩展算法：在码本映射的过程中，使用加权系数来得到映射码本。客观测试结果表明，用此算法得到的宽带语音的谱失真度比用一般的码本映射降低至少2%。主观测试结果表明，用此算法得到的
基于MT8880的一键拨号电话系统设计
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针对煤矿井下调度及紧急救援系统的需求，以DTMF编解码模块为核心，设计了具有自动拨号功能的新型电话系统。该系统利用MT8880对DTMF信号的编解码功能实现一键拨号和远程设置，通过检测振铃和忙音信号，完成自动摘机和挂机过程，配合AGC等外围电路达到话音清晰流畅的效果。</p>
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Abstract:</p>
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To meet the demand for min
Warn you trough modem when your telephone is ringing. Useful to work with headphones. =)
Warn you trough modem when your telephone is ringing. Useful to work with headphones. =)
wireless telephone circuit and analysis
wireless telephone circuit and analysis
New security and control protocol for VoIP based on steganography and digital watermarking （关于ip te
New security and control protocol for VoIP based on steganography and digital watermarking
（关于ip telephone security的外文资料2006年）
用java 开发的 一个 telephone 软件
用java 开发的 一个 telephone 软件， 软件 虽小， 功能 强悍
Contains a project related to the managment of a Telephone Directory... Feel free to download and us
Contains a project related to the managment of a Telephone Directory... Feel free to download and use!!
The files in this directory comprise ANSI-C language reference implementations of the CCITT (Intern
The files in this directory comprise ANSI-C language reference implementations
of the CCITT (International Telegraph and Telephone Consultative Committee)
G.711, G.721 and G.723 voice compressions.
jtapi for telephone
jtapi for telephone
ITU-T Recommendation V.90 98年9月版本 A DIGITAL MODEM AND ANALOGUE MODEM PAIR FOR USE ON THE PUBLIC SWI
ITU-T Recommendation V.90 98年9月版本
A DIGITAL MODEM AND ANALOGUE MODEM PAIR FOR USE ON THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN) AT DATA SIGNALLING RATES OF UP TO 56 000 bit/s DOWNSTREAM AND UP TO 3
Online Telephone Directory in Visual Basic
Online Telephone Directory in Visual Basic
该源代码是有关modem 拨号
该源代码是有关modem 拨号，it is based on Windows Telephone API (TAPI) service
The second edition of WiMax Operator鈥檚 Manual includes most of the material from the first edition
The second edition of WiMax Operator鈥檚 Manual includes most of the material from the first
edition, plus new discussions of
鈥?The ultra-high-speed mobile telephone standard, HSDPA
鈥?Ultrawideband
Application Note Abstract This Application Note introduces a complete and detailed PSoC® project
Application Note Abstract
This Application Note introduces a complete and detailed PSoC® project. Telephone Call Logger keeps the detailed record of
approximately 945 phone calls (7-digit number
Abstract-The effect of the companding process on QAM signals has been under investigation for the p
Abstract-The effect of the companding process on QAM signals
has been under investigation for the past several years. The
compander, included in the PCM telephone network to improve
voice performan
Nokia telephone source code
Nokia telephone source code
Telephone directory programmed in java
Telephone directory programmed in java