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<H2 align=center><STRONG>ISD2560语音芯片在排队机系统中的应用 </STRONG></H2>
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            <P class=MsoNormal><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><B>摘要:</B></SPAN>详细介绍了Winbond公司生产的ISD2560语音芯片的引脚功能、操作模式以及具体使用方法,给出了用AT89C51与ISD2560构成的语音系统的硬件结构和软件设计方法。</P>
            <P class=MsoNormal><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">&nbsp;&nbsp;&nbsp; 
            <B>关键词:</B></SPAN>单片机;ISD2560;语音芯片;ISD1425</P>
            <P 
            style="TEXT-INDENT: 30px">目前,电脑语音服务的应用范围越来越广,如电脑语音钟、语音型数字万用表、手机话费查询系统以及公共汽车报站器等。而Winbond公司生产的ISD2500系列语音芯片是具有较强功能的一种电脑语音录放器件,它能够应用在很多需要语音服务的场合。AT89C51是ATMEL公司生产的性能良好、价格便宜的单片机。文中介绍了用AT89C51和ISD2560构成的智能型排队机的语音部分,可实现语音的分段录取和组合回放,同时可通过修改软件实现整段或循环播放。本文重点介绍了用该电路来完成语音的组合播放等功能的实现方法。</P>
            <P 
            style="TEXT-INDENT: 30px">ISD2560是ISD系列单片语音录放集成电路的一种。这是一种永久记忆型语音录放电路,录音时间为60s,可重复录放10万次。<IMG 
            onmousewheel="return bbimg(this)" onclick=ImgClick(this) height=385 
            hspace=1 
            src="★★★博士教育网--- 消费类电子论文--ISD2560语音芯片在排队机系统中的应用.files/11a.gif" 
            width=258 align=right vspace=1 border=0 
            resized="0">该芯片采用多电平直接模拟量存储专利技术,每个采样值可直接存储在片内单个EEPROM单元中,因此能够非常真实、自然地再现语音、音乐、音调和效果声,从而避免了一般固体录音电路因量化和压缩造成的量化噪声和“金属声”。该器件的采样频率为8.0kHz,同一系列的产品采样频率越低

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