1.1概述 一、输入设备的作用 将字符、图形、图象、语音等信息转换成电脉冲信息,送入主机进行加工处理

8.1键盘及其接口 8.2显示器接口 8.3打印机接口 8.4拨码盘及语音接口

小波分析是近十几年才发展起来并迅速应用到图像处理和语音分析等众多领域的一种 数学工具。它是继110多年前的傅立叶(Joseph Fourier)分析之后的一个重大突破,无论是对 古老的自然学科还是对新兴的高新技术应用学科都产生了强烈冲击

2.1引言 2.2基本编码方法 2.3图像编码标准 2.4语音编码标准

1. Definition of tone Tones are pitch variations, which are caused by the differing rates of vibration of the vocal cords. 声调是由于声带振动的速率的不同而引起的音高变化

Part Two Sounds in Connected Speech 1. Strong and Weak Forms 2. Assimilation and elision 3. Liaison 4. Length of a sound 5. Word stress 6. Sentence stress 7. Rhythm 8. Sense groups and Pause

202.The length of a sound is the length of time during which it is held on continuously in a given word or phrase. The principal facts concerning length in English are given in the following rules: 203. Length of vowels 1.English vowels [i:], are longer than the other English vowels in similar context,i.e when surrounded by the same sounds, and pronounced with the same degree of stress Thus the vowels in bead

Rhythm in English speech is based on stress. rhythm unit节奏单位)is formed by stressed syllable, together with unstressed syllables which may come before the stress and after it.The unstressed syllables before the stress are said very quickly, so they are very short, as short as you can make them; but the stressed syllable is as long as before, so there is great difference of length between the unstressed syllables and the stressed one, e.g

It should first be pointed out that there are two kinds of stress: word stress and sentence stress. The former is concerned with the stressing of individual words of two or more syllables when they are pronounced in isolation

Chapter 3 Liaison If we want to speak English fluently, we must try to avoid pronouncing each word as if it were isolated. We must try to link words together smoothly and naturally. In English one word is not separated from another by pausing or hesitating; the end of one word flows straight on to the