英语翻译
英语翻译
引 言
目前,随着数字化信号处理技术的不断提高,单片机,数字信号处理器以及语音处理大规模集成电路的进步,语音合成,语音识别,语音存储和回放技术的应用越来越广泛.本文提出的体积小巧,功耗低的数字化语音存储与回放系统将完全可以替代传统的语音录放系统.
1选题背景及意义
从磁带、录像带到CD、VCD、DVD；从黑白电视机、彩色电视机、高清晰度电视机（HDTV）到具有数字信号处理功能的电视机；从留声机、录音机到语音信箱；现在正处在模拟信息到数字信息的变革之中,传统的磁带语音录放系统因其体积大,使用不便,在电子与信息处理的使用中受到许多限制.虽然,目前广播电视系统尚未实现真正的数字化,相信在不久的将来,真正的数字电视机、数字收音机、数字收录机将进入家庭.所以,研究音频信号的数字化存储、处理和回放系统有着很重要的现实意义.
其中,关键技术在于：为了增加语音存储时间,提高存储器的利用率,采用了非失真压缩算法对语音信号进行压缩后再存储,而在回放是再进行解压缩；同时,对输入语音信号进行数字滤波以抑制杂音和干扰,从而确保了语音回放的可靠质量.
Introduction
Now,with digital signal processing technology and continuous improvement,microcontroller,digital signal processors as well as the voice of progress in dealing with large-scale integrated circuits,speech synthesis,speech recognition,voice storage and playback technology more widely.In this paper,compact size,low power consumption of digital audio storage and playback system can replace traditional voice recording system.
1 Background and significance of topics
From the tapes,video tapes to CD,VCD,DVD; from black-and-white TV,color TV,high-definition TV (HDTV) to a digital TV signal processing functions; from the gramophone,tape recorder to the voice mail; now at analog information into digital information revolution,the traditional voice of the tape recording system because of its bulky,inconvenient to use in electronics and information processing limitations in use by many.Although the current system of radio and television has not yet been digitized real,I believe that in the near future,the real digital TV,digital radio,digital tape recorders will enter the family.Therefore,the study of digital audio signal storage,processing and playback system has a very important practical significance.
Among them,the key technologies are:In order to increase the voice storage time and increase the utilization of memory,using a non-lossy compression algorithm to compress voice signals and then stored again in the replay is decompressed; At the same time,the digital input voice signal filter to suppress noise and interference,so as to ensure reliable voice quality playback.