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通常我们所说的语音卡,是指用于IBM PC-XT、PC-AT、PS/2及其兼容系统、支持在多路电话线上进行语音I/O的扩展卡。语音卡提供的功能包括:对语音信号进行实时录音、数字化和压缩存储;播放以前录制的语音文件两种基本功能。另外,语音卡还辅以除语音信号以外的其他信号的生成、检测、监听、分析呼叫过程等功能。 技术概述 在数字化语音录音过程中,语音卡按一定的频率采样连续声波,将模拟信号转换为数字表示,以数字化形式记录采样点语音信号的强度。任何一个语音处理系统都要考虑两个关键点:录音质量和数字化语音所占存储空间的大小。用户希
The voice card we usually refer to is an expansion card that supports voice I / O on a multichannel telephone line for IBM PC-XT, PC-AT, PS / 2, and their compatible systems. Voice card features include: real-time voice signal recording, digital and compressed storage; play previously recorded voice file two basic functions. In addition, the voice card is supplemented by other than voice signal generation, detection, monitoring, analysis of the call process and other functions. Technical Overview In the process of digital voice recording, the voice card samples continuous acoustic waves at a certain frequency and converts the analog signals into digital ones to record the intensity of the sampled voice signals digitally. Two key points to consider in any speech processing system are the quality of the recording and the amount of storage space that digital speech occupies. Users hope