利用Microsft Sapi的文本语音系统来实现在IE中对选择文本的发音。适用于学英语。IE中对选中文本右键选择speech。

Speex is an Open Source/Free Software patent-free audio compression format designed for speech.

Abstract— We propose a simple speech compression algorithm using subband division and ADPCM (Adaptive Differential Pulse Code Modulation) algorithm. Although speech data are stored in a semiconductor memory device, its capacity and the availa