... 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...
...
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...
...
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...
... 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...
... 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...
... 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...
... 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 digitalaudio is the definition of a multichannel audio representation sys-
tem to create a convincing, lifelike soundfield both for audio- only...
... G.A. DigitalAudio 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...
...
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...
... contains specific information for the
dsPIC30F3014/4013 Digital Signal Controller (DSC)
devices. The dsPIC30F3014/4013 devices contain
extensive Digital Signal Processor (DSP) functionality
within ... Module 103
17.0 CAN Module 111
18.0 Data Converter Interface (DCI) Module 121
19.0 12-bit Analog-to -Digital Converter (ADC) Module 131
20.0 System Integration 141
21.0 Instruction Set Summary 159
22.0...
... 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,...
... DAFX (Digital Audio Effects) Scientific
Committee. His interests are centered in audio signal representations, sound synthesis by physical
models, digitalaudio 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 digitalaudio 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...
...
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.
...
... 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...