基于LabVIEW的双声道语音录制系统的设计

本文论述了一款双声道语音录制系统的组成及开发过程,该系统利用LabVIEW进行设计,采用计算机声卡代替专用数据采集卡,实现语音信号的录制、显示、存储等功能,具有广阔的应用前景。     

飞机语音告警系统语音库的建立

飞机语音告警系统语音信息的录制工作存在受人员、环境限制及操作繁琐等问题,本文提出了解决方案：建立了一种通用的语音报警系统语音库,阐明了该系统的基本原理、建立过程和人机交互的实现。     

基于LPCC参数的语音识别系统

为了识别简单语音,设计了一个基于LPCC参数的语音识别系统。该系统其主要功能有语音信号的录制、播放、预处理、分段滤波、特征提取以及识别语音。最后通过仿真实验验证了本系统能够达到识别简单语音的要求,但仍有需改进的地方,如:能否在复杂环境下识别比较复杂的语音。     

基于MATLAB的皮肤听声器系统的研究

为了使皮肤听声器能够辨析语音,设计了基于MATLAB的皮肤听声器系统。该系统以MATLAB软件为平台,在此基础上实现了语音信号的录制、播放、预处理、分段滤波、特征提取等功能,并利用特征参数辨析语音。本系统达到了辨析简单语音的要求,但仍有需改进的地方,如:能否构造更合适的特征参数,能否辨析比较复杂的语音。     

语录室声音录制技巧

本文主要简单介绍单纯语音录制的技巧,以及语录室传声器的使用和语音录制时常用到的一些术语.     

厂商中标信息

近期,大洋中标和田广电局译制网系统。该系统将包括4个精编站点、2个上下载站点、2个审片站点、12套音频工作站,还有26套抄译工作站,是一个集视音频节目录制、上载、语音录制、音效制作、拟音制作、混录、视音频下载、抄写、翻译、校对、剧     

如何使用手机语音信箱

怎样开启并使用您的语音信箱? 1.进入:当您在移动营业厅为您的手机申请使用语音功能后,您就可以在您的手机上按13800100200,进入语音信箱系统。 2.录制问候语:您的问候语会在来电进入手机的语音信箱时播放。依次按3键、1键,然后根据语音提示,您就可以录制了。当您对自己录制的问候语满意后,您就可以根据语音提示操作确认即可。 3.设置信箱密码:每个信箱的初始密码都是“1234”。但为了确保语音信箱的保密性,您可以依次按3键、4键,并根据语音提示操作即可重新设置您的信箱密码。     

语音信号模拟传输系统实验设计与实现

针对通信原理授课案例的不足,考虑到近距离传输模拟系统的优势设计了语音信号模拟带通传输系统实验案例。以录制的语音为信号源,在模拟调制原理的基础上结合语音信号特性,构建了基于幅度调制的信号传输系统。实验结果表明:模拟带通系统可以有效地实现语音信号传输且直观性强,易于学生深入理解模拟调制解调原理,很大程度上激发了学生的学习兴趣和学习积极性。     

一种用于无线通信的数字语音识别系统设计

数字语音录制过程中存在的环境、用户口音和非目标词汇等干扰,使以往开发出的无线通信数字语音识别系统准确性较低、可移植性较差。因此,对无线通信的数字语音识别系统进行优化设计,设计系统的核心元件为C6727DSP芯片、QGDH710语音识别芯片和CC2520射频收发器。C6727DSP芯片进行数字语音的前期处理工作;QGDH710语音识别芯片对处理后的数字语音进行识别,并将其识别出的指令反馈到CC2520射频收发器;CC2520射频收发器进行指令的格式转换工作,并将指令传输到用户无线通信设备中,最终实现数字语音识别系统在无线通信中的有效利用。为了方便用户进行系统操作,软件给出用户无线通信设备虚拟功能图。经实验验证可知,该设计系统准确性较高,具有高度可移植性。     

一种低成本的病床呼叫系统

基于STC89C52单片机设计了一款低成本病床呼叫系统。使用单片机控制语音合成芯片和液晶显示模块,通过ISD1760的FT直通操作模式录制语音信息,然后利用ISD1760的SPI模式接口与单片机的I/O端口连接通信,实现单片机对语音芯片的控制。同时加入留言功能,使呼叫系统更加人性化。样机测试表明,呼叫系统的稳定性高,解决了落后地区乡镇医院中病人得到及时护理的问题。     

Heat Assisted Magnetic Recording

Heat-assisted magnetic recording is a promising approach for enabling large increases in the storage density of hard disk drives. A laser is used to momentarily heat the recording area of the medium to reduce its coercivity below that of the applied magnetic field from the recording head. In such a system, the recording materials have a very high magnetic anisotropy, which is essential for the thermal stability of the magnetization of the extremely small grains in the medium. This technology involves new recording physics, new approaches to near field optics, a recording head that integrates optics and magnetics, new recording materials, lubricants that can withstand extremely high temperatures, and new approaches to the recording channel design. This paper surveys the challenges for this technology and the progress that has been made in addressing them.      

Digital video recording

Through mutual technology transfer between consumer and professional video recorders, the last 20 years has witnessed a rapid evolution from analog to digital recording. Each new digital videotape recorder (VTR) uses different channel coding. This implies that improving the recording density involves the development of new channel-coding schemes together with evolutionary magnetic tapes and heads. As a result, professional digital VTR's offer the best features for video recording. This paper reviews state-of-the-art magnetic recording devices, signal processing techniques for digital recording. It also describes the specifications for home-use digital recorders for current television systems, and discusses disk recording technology in the future     

面向多核程序确定性重演的内存竞争记录机制研究

内存竞争记录是实现多核程序确定性重演的关键技术.针对现有内存竞争记录算法存在消耗资源多、记录日志大、重演速度受限等问题,本文提出了一种硬件结构支持的、基于分段技术的、高效的点对点内存竞争记录算法,该算法用一种更严格的间接发生序表示内存竞争,采用分段的可推导约减算法减少记录内存竞争的次数,同时使用最大近似时戳法近似已被替...     

外包呼叫中心座席在线IP录音的技术研究

从外包呼叫中心业务实际运营过程中碰到的录音文件丢失、录音检索信息丢失等问题出发,提出了一种在线IP录音的解决思路,可通过流媒体端口镜像采集数据的IP录音模式,经济、有效地解决传统并线座席录音方面存在的数据丢失问题。最后对在线IP录音系统的设计要素及其策略进行了介绍。     

Coded modulation and precoding for electron-trapping opticalmemories

This paper develops coding and signal processing approaches for a novel optical recording channel that arises from electron-trapping phosphor materials. The recording medium allows multiple reads and writes, and one important feature is that the read process serves to erase the disk. This feature would enable vendors of prerecorded video to provide customers with one-time services. For applications where this feature is not desirable, the data can be immediately rewritten. From a communications viewpoint, the most important feature of this new channel is that, subject to a peak constraint, it supports a continuum of recording levels. The combination of read and write processes creates a partial-response channel, and the ability to write a continuum of levels makes it possible to employ precoding techniques, such as the one developed by Tomlinson (1971) and by Miyakawa and Harashima (1969). This is fundamentally different from magnetic data storage, where the read/write process creates a partial-response channel but where it is only possible to write two levels at the input to that channel. This paper shows that the use of precoding and coset codes can significantly improve upon the recording densities (and recording rates) that can be achieved by using M-ary run length constrained codes to eliminate intersymbol interference (ISI) at the output of the read/write process. The approach presented is applicable to any optical recording channel that supports a continuum of recording levels     

LiNbO3∶Fe∶Rh晶体近红外非挥发全息记录

采用双中心记录方案在双掺杂LiNbO3∶Fe∶Rh晶体中实现了近红外非挥发全息记录,研究了LiNbO3∶Fe∶Rh晶体在633 nm,752 nm,799 nm波长下的全息记录性能。结果表明,在使用近红外记录光时,其记录灵敏度随敏化光强的变化趋势与双中心短波长记录时的不同。通过和LiNbO3∶Fe∶Mn等传统双掺杂铌酸锂晶体的近红外波段记录效果对比,发现同时掺杂Fe和Rh可增强晶体对近红外光的吸收,获得更高的浅中心Fe光生伏特系数,从而能够在LiNbO3∶Fe∶Rh晶体中实现近红外波段的光折变全息记录。     

磁带记录与时序器记录的比较

本文对磁带录音（磁带演播室）和时序器录音（无磁带演播室）这两种录音方式进行了比较，从中可以了解到这两种录音方式的优缺点。     

An electrostatic recording method using transformer assemblies based on error-correcting codes

A new high-speed electrostatic recording method has been developed that utilizes assemblies of transformers whose secondary windings are wound on the cores and connected to output terminals in arrangements based on (n,k) or fixed-weight error-correcting codes. This method is used to distribute electrostatic recording pulses to styli to form latent images on recording paper. With the present experimental device a recording speed of 480 kilodots per second, or 436 steps per second, was obtained.     

Microfabrication of ultra-long reinforced silicon neural electrodes

The authors describe a simple dry-etch silicon microfabrication process to develop an array of electrodes with multiple recording sites suitable for neural recording applications. This new high-yield fabrication process uses commercially available ultra-thin silicon wafers as substrate material. A xenon difluoride system is used to etch the silicon substrate to form the electrode structures. The novel concept of structural reinforcement to produce elongated and reliable probe electrodes is introduced. The authors demonstrate recording silicon electrodes that can reach lengths longer than 10 mm having only 50 μm thicknesses and an 100 μm average width. This new microfabrication process illustrates a simple, cost-effective and mass-producible method for developing ultralong silicon probes for deep brain implantation and neural recording.