Ngày tải lên: 22/06/2014, 19:20
Tài liệu Báo cáo môn mạng máy tính " ADSL - Asymmetric Digital Subscriber Line " ppt
... PHÒNG KHOA CÔNG NGHỆ THÔNG TIN BÁO CÁO MÔN MẠNG MÁY TÍNH ADSL ADSL (Asymmetric Digital Subscriber Line ) (Asymmetric Digital Subscriber Line ) Giáo viên hướng dẫn : Đỗ Xuân Toàn Nhóm sinh viên ... trên Internet một cách nhanh hơn. 4 ADSL có nghĩa như thế nào? ADSL viết tắt của Asymmetric Digital Subscriber Line - đó là đường thuê bao số không đối xứng, kỹ thuật truyền được sử dụng ... tới thuê bao) có thể nhanh gấp hơn 10 lần so với tốc độ của chiều lên (từ thuê bao tới mạng). Digital: Các Modem ADSL hoạt động ở mức bít (0 & 1) và dùng để chuyển thông tin số hoá giữa...
Ngày tải lên: 11/12/2013, 18:15
Tài liệu The Emerging Digital Economy II ppt
... Electronic Commerce in the Digital Economy Page 13 43 "GDP and the Digital Economy: Keeping Up With the Changes," Brent R. Moulton, paper presented at Understanding the Digital Economy Conference , ... Commerce in the Digital Economy Page 1 * This chapter was written by Patricia Buckley, senior policy advisor in the Office of Policy Development. CHAPTER I ELECTRONIC COMMERCE IN THE DIGITAL ECONOMY * “The ... demand and business imperatives, the digital economy is becoming truly global. The United States continues to lead the world in many measures of the utilization of digital technology. However, this...
Ngày tải lên: 21/12/2013, 03:15
Tài liệu COMPLETE DIGITAL DESIGN P1 ppt
... CHAPTER 1 Digital Logic All digital systems are founded on logic design. Logic design transforms algorithms and processes conceived by people into computing machines. A grasp of digital logic ... ex- plained previously in designing hybrid analog /digital circuits to support a larger digital system. -Balch.book Page xvi Thursday, May 15, 2003 3:46 PM 8 Digital Fundamentals Augustus DeMorgan, ... sharpen their skills in modern digital system design. Engineers who have spent years outside the design arena or in less-than-cutting-edge areas often find that their digital design skills are behind...
Ngày tải lên: 22/12/2013, 20:18
Tài liệu Complete Digital Design P2 ppt
... Phase Period Finite transition time of real clock signal FIGURE 1.10 Digital clock signal. -Balch.book Page 18 Thursday, May 15, 2003 3:46 PM 24 Digital Fundamentals may begin to change. Again, if the input ... One-trillionth 10 –12 pps -Balch.book Page 24 Thursday, May 15, 2003 3:46 PM 14 Digital Fundamentals The majority of digital components adhere to power-of-two magnitude definitions. However, some ... two or three octal digits were common in earlier times. Because of the inherent binary nature of digital systems, quantities are most often expressed in or- ders of magnitude that are tied to binary...
Ngày tải lên: 22/12/2013, 21:18
Tài liệu Altenative Digital Photography P1 ppt
... CS. Chapter 1 x Alternative Digital Photography Chapter 11 Digital Pinhole 153 Lesson 11.1—Making Your Own Digital Pinhole Camera 154 Lesson 11.2—Using a Commercial Pinhole Attachment 157 Gallery of Digital Pinhole ... book is to bring back that fun by suggesting digital reproductions of the old techniques such as digital pinhole cameras, digital toy cameras, and digital infrared. It also suggests some new ideas ... it looks like in advance. 10 Alternative Digital Photography Figure 1.15 Creating a Channel Mixer layer. Figure 1.16 The Channel Mixer. 8 Alternative Digital Photography Figure 1.11 Picking the...
Ngày tải lên: 22/12/2013, 23:15
Tài liệu Digital Communications Harold ppt
... 1986. R.E. Ziemer and R.L. Peterson, Digital Communications and Spread Spectrum Systems, New York, Macmillan, 1985. R.E. Ziemer and R.L. Peterson, Introduction to Digital Communications, New York, ... sudden bump in the number of times Spread Spectrum (SS) techniques were mentioned in the amateur digital areas. While QEX has discussed SS in the past, we haven't touched on it in this forum. ... computer science at the Naval Postgraduate School in Monterey, California. His areas of interest are digital communications, amateur satellites, VHF/UHF contesting, and QRP. His research area closely...
Ngày tải lên: 21/01/2014, 04:20
Tài liệu 40 MPEG Digital Audio Coding Standards pdf
... ISO/MPEG -audio codec: A generic standard for coding of high quality digital audio, J. Audio Eng. Soc. (AES), 42(10), 780–792, Oct. 1994. [31] van de Kerkhof, L.M. and Cugnini, A.G., The ISO/MPEG audio ... will use the MPEG-2 /Audio algorithm. 40.7 Conclusions Lowbitratedigitalaudioisappliedinmanydifferentfields,suchasconsumerelectronics,professional audioprocessing,telecommunications,andbroadcasting. ... MPEG-2 /Audio Multichannel Coding A logical further step in digital audio is the definition of a multichannel audio representation sys- tem to create a convincing, lifelike soundfield both for audio- only...
Ngày tải lên: 22/01/2014, 12:20
Tài liệu 41 Digital Audio Coding: Dolby AC-3 pdf
... G.A. Digital Audio Coding: Dolby AC-3” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC Press LLC, 1999 c 1999byCRCPressLLC TABLE41.2 AC-3 Audio ... of the six Audio Blocks depending on audio signal bit demand. This feature is particularly useful when the audio signal is non-stationary over the 1536-sample synchronization frame. Audio Blocks ... in a perceptual audio coder, presented at the 97th Convention of the Audio Engineering Society, Preprint 3921, November 1994. [9] Schroeder, M., Atal, B. and Hall, J., Optimizing digital speech...
Ngày tải lên: 22/01/2014, 12:20
Tài liệu Innovation within Digital Rights Management ppt
... 4.1.4 Digital Content Protection LLC Digital Content Protection LLC is an organization created to license High- bandwidth Digital Content Protection (HDCP), a scheme for protecting video on Digital ... Digital Rights Management (DRM). DRM has attempted to address the issue of licensing and controlling distribution of digital content. In general, all DRM systems allow the distribution of digital ... in digital form. Virtually any information that can be represented by words, numbers, graphics, audio information, or a system of commands and instructions can be formatted into electronic digital...
Ngày tải lên: 24/01/2014, 00:20
High-Performance, 16-bit Digital Signal Controllers ppt
... contains specific information for the dsPIC30F3014/4013 Digital Signal Controller (DSC) devices. The dsPIC30F3014/4013 devices contain extensive Digital Signal Processor (DSP) functionality within ... read and write instructions can be used to access all 24 bits of an instruction word. Overhead -free circular buffers (Modulo Addressing) are supported in both X and Y address spaces. This is primarily ... An instruction prefetch mechanism is used to help maintain throughput. Program loop constructs, free from loop count management overhead, are supported using the DO and REPEAT instructions, both of...
Ngày tải lên: 06/03/2014, 22:20
Shoot Like a Pro! DIGITAL PHOTOGRAPHY TECHNIQUES ppt
... 207 B Online Resources for Digital Photographers . . . . . . . 219 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223 v DigPhoto / Shoot Like a Pro! Digital Photography/ King/ ... ways to get pro-quality results with your digital camera. Among other things, you’ll find out how to • Take better advantage of all the options on your digital camera—from resolution to ISO to ... virtual reality images. • Manipulate colors using traditional and digital filters. xvi Shoot Like a Pro! DigPhoto / Shoot Like a Pro! Digital Photography/ King/ 2949-7 / P:\010Comp\VirClass\949-7\fm.vp Thursday,...
Ngày tải lên: 11/03/2014, 19:20
DAFX: Digital Audio Effects Second Edition potx
... DAFX (Digital Audio Effects) Scientific Committee. His interests are centered in audio signal representations, sound synthesis by physical models, digital audio effects, spatial audio, audio coding, ... Fundamentals of digital signal processing The fundamentals of digital signal processing consist of the description of digital signals –inthe context of this book we use digital audio signals – ... literature for an introduction to digital signal processing [ME93, Orf96, Z ¨ ol05, MSY98, Mit01]. 1.3.1 Digital signals The digital signal representation of an analog audio signal as a sequence of...
Ngày tải lên: 16/03/2014, 11:20
Chuyển đổi và kiểm tra lỗi các tập tin audio với Helium Audio Converter ppt
... Chuyển đổi và kiểm tra lỗi các tập tin audio với Helium Audio Converter Helium Audio Converter là công cụ miễn phí, hỗ trợ người dùng chuyển đổi qua lại ... Options tương ứng với mỗi định dạng âm thanh xuất ra để thay đổi các tham số nén âm thanh. Helium Audio Converter tương thích mọi Windows, bạn tải về sử dụng miễn phí tại đây. ...
Ngày tải lên: 20/03/2014, 16:20
Foundations of Analog and Digital Electronic Circuits ppt
... discretizing matter. 1 Digital systems use the digital abstraction, which is based on discretizing signal values. Clocked digital systems are based on discretizing both signals and time, and digital systolic ... abstraction that simplifies the building of bigger analog systems. The logic gate, the digital memory, the digital finite-state machine, and the microprocessor are themselves a succession of abstractions ... also introduces several major applications of first-order networks, including digital memory. Chapter 11 discusses energy and power issues in digital systems and introduces CMOS logic. Chapter 12 analyzes second...
Ngày tải lên: 23/03/2014, 08:21