Digital signal
Processing
Professor
Peng Qi-cong (彭启琮 )
Tel,028-83202502
e-mail,qpeng@uestc.edu.cn
Introduction
Digital Signal Processing
Theory,method,algorithm
A kind of microprocessor used to
implement digital signal
processing algorithm
Digital Signal Processor
The foundation of information
technology is digitalization.
The kernel of digitalization is digital
signal processing
Most of digital signal processing,
especially real-time processing are
implemented by DSP processor or ASIC
based on DSP core
DSP technology becomes hot front edge
and is growing up rapidly.
DSP Solution
Programmable switch
Mobile phone
The handset is not only used
for voice communication
VOP (Voice over Package)
HFC（ Hybrid Fiber-Coax）
ADSL
（ Asymmetric Digital Subscriber Line)
Software radio
BPF
Local
oscillator
BPF ADC DSP
audio
Digital
video
LNA
Digital Camera
Digital Camera
HDTV
High Definition TV
PDP (Plasma Display)TV
Home Theater
DB Digital AC-3
DVD(Digital Video Disc)
SET-TOP-BOX
STB（ Set-Top - Box）
STB
Watchman
Simulator of airplane
GPS(Global Position System)
Radar/Sonar
Cruise missile
Smart bomb from F117
Pattern recognization
Fingerprint distinguish
Why digital?
（ 1） Programmability
Analog system,Modify
hardware design.
Digital system,Modify software.
Example,Analog filter,digital
filter,adaptive filter
Why digital?
（ 2） Precision
Analog system,component
specification,resistors have a
tolerance 5%; capacitors 20% or
worse
Digital system,ADC bits,CPU
word width and algorithm
Why digital?
（ 3） Stability
Analog system,the characteristics of
analog system components,resistors,
capacitors and operational amplifiers will
change along with temperature,humidity
Digital system,will show no variation
with temperature throughout their
guaranteed operation range.
Why digital?
(4) Anti-noise
Why digital?
Amplify A
Amplify B
Signal
generator
computer A
computer B
(5) Repeatability
Why digital?
（ 6） VLSI (Very Large Scale
Integrated circuit)
Why digital?
(7) Error Correcting Codes
Data retrieval and transmission systems suffer
from a number of potential forms of error.
With information in a digital or binary form,we
may easily build into the data stream additional
“redundant” bits that are used to detect when
an error has occurred.
Why digital?
(8) Data Transmission and Storage
The Internet,Compact Disc (CD) and
Digital Video Disc (DVD) brought
information based on trouble-free high-
quality text,audio and video into the
office and home.
The fidelity of the digital medium is greater
than that of the analog one.
Why digital?
(9) Data Compression
The information channels cost and transmission
bottlenecks make compression necessary for
real-time processing.
With analog compression some information is lost,
A typical example is the bandwidth limiting
applied to analog telephone lines in order to
multiples calls,which limits the frequency
response to 3.4kHz.
We still need analog processing
（ 1） Real-Time Processing
Analog system,Besides the
delay introduced by the circuit,the
processing is in real-time.
Digital system,Decided by the
processor speed.
We still need analog processing
（ 2） Processing very high frequency
signals
Analog system,may process microwave,
mini-meter-wave,even light wave signals.
Digital system,By the Nyquist Rule,the
processing speed is limited by the S/H,A/D and
processor speed.
We still need analog processing
(3)The most signals in real would are
analog.
If we want to process these analog
signals with digital signal processing
system,must change them into
digital form first by mixed signal
processing.
Requirement of DSP Engineers is
growing up rapidly
ANALOG DEVICES AND INTEL
TO DEVELOP DIGITAL SIGNAL
PROCESSING TECHNOLOGY
SANTA CLARA,Calif,(Feb,3,1999) - Intel
Corporation and Analog Devices,Inc.
announced today that they have signed a joint
development agreement to design a Digital
Signal Processing (DSP) core architecture,
which will result in a fixed-point,low-power
DSP core ideal for processing video,image,
voice and data in emerging embedded
communications and internet appliances.
MIPS TECHNOLOGIES,INC,AND
TI ANNOUNCE A STRATEGIC
RELATIONSHIP
MOUNTAIN VIEW,CALIF,and
DALLAS,TX (Feb,16,1999) -- MIPS
Technologies,Inc,(NASDAQ,MIPS) and
Texas Instruments (NYSE,TXN)
announced today a relationship to
provide TI access to MIPS Technologies'
processor cores in support of TI's digital
signal processor (DSP) System Level
Integration (SLI) solutions.
Development of DSP
Higher processing speed
Multi-DSP co-operation
More powerful and convenient
development environment
ASIC based on DSP core
Lower price or higher performance price
ratio
Lower power consumption or longer
battery life
Tel,028-83202502
e-mail,qpeng@uestc.edu.cn
Processing
Professor
Peng Qi-cong (彭启琮 )
Tel,028-83202502
e-mail,qpeng@uestc.edu.cn
Introduction
Digital Signal Processing
Theory,method,algorithm
A kind of microprocessor used to
implement digital signal
processing algorithm
Digital Signal Processor
The foundation of information
technology is digitalization.
The kernel of digitalization is digital
signal processing
Most of digital signal processing,
especially real-time processing are
implemented by DSP processor or ASIC
based on DSP core
DSP technology becomes hot front edge
and is growing up rapidly.
DSP Solution
Programmable switch
Mobile phone
The handset is not only used
for voice communication
VOP (Voice over Package)
HFC（ Hybrid Fiber-Coax）
ADSL
（ Asymmetric Digital Subscriber Line)
Software radio
BPF
Local
oscillator
BPF ADC DSP
audio
Digital
video
LNA
Digital Camera
Digital Camera
HDTV
High Definition TV
PDP (Plasma Display)TV
Home Theater
DB Digital AC-3
DVD(Digital Video Disc)
SET-TOP-BOX
STB（ Set-Top - Box）
STB
Watchman
Simulator of airplane
GPS(Global Position System)
Radar/Sonar
Cruise missile
Smart bomb from F117
Pattern recognization
Fingerprint distinguish
Why digital?
（ 1） Programmability
Analog system,Modify
hardware design.
Digital system,Modify software.
Example,Analog filter,digital
filter,adaptive filter
Why digital?
（ 2） Precision
Analog system,component
specification,resistors have a
tolerance 5%; capacitors 20% or
worse
Digital system,ADC bits,CPU
word width and algorithm
Why digital?
（ 3） Stability
Analog system,the characteristics of
analog system components,resistors,
capacitors and operational amplifiers will
change along with temperature,humidity
Digital system,will show no variation
with temperature throughout their
guaranteed operation range.
Why digital?
(4) Anti-noise
Why digital?
Amplify A
Amplify B
Signal
generator
computer A
computer B
(5) Repeatability
Why digital?
（ 6） VLSI (Very Large Scale
Integrated circuit)
Why digital?
(7) Error Correcting Codes
Data retrieval and transmission systems suffer
from a number of potential forms of error.
With information in a digital or binary form,we
may easily build into the data stream additional
“redundant” bits that are used to detect when
an error has occurred.
Why digital?
(8) Data Transmission and Storage
The Internet,Compact Disc (CD) and
Digital Video Disc (DVD) brought
information based on trouble-free high-
quality text,audio and video into the
office and home.
The fidelity of the digital medium is greater
than that of the analog one.
Why digital?
(9) Data Compression
The information channels cost and transmission
bottlenecks make compression necessary for
real-time processing.
With analog compression some information is lost,
A typical example is the bandwidth limiting
applied to analog telephone lines in order to
multiples calls,which limits the frequency
response to 3.4kHz.
We still need analog processing
（ 1） Real-Time Processing
Analog system,Besides the
delay introduced by the circuit,the
processing is in real-time.
Digital system,Decided by the
processor speed.
We still need analog processing
（ 2） Processing very high frequency
signals
Analog system,may process microwave,
mini-meter-wave,even light wave signals.
Digital system,By the Nyquist Rule,the
processing speed is limited by the S/H,A/D and
processor speed.
We still need analog processing
(3)The most signals in real would are
analog.
If we want to process these analog
signals with digital signal processing
system,must change them into
digital form first by mixed signal
processing.
Requirement of DSP Engineers is
growing up rapidly
ANALOG DEVICES AND INTEL
TO DEVELOP DIGITAL SIGNAL
PROCESSING TECHNOLOGY
SANTA CLARA,Calif,(Feb,3,1999) - Intel
Corporation and Analog Devices,Inc.
announced today that they have signed a joint
development agreement to design a Digital
Signal Processing (DSP) core architecture,
which will result in a fixed-point,low-power
DSP core ideal for processing video,image,
voice and data in emerging embedded
communications and internet appliances.
MIPS TECHNOLOGIES,INC,AND
TI ANNOUNCE A STRATEGIC
RELATIONSHIP
MOUNTAIN VIEW,CALIF,and
DALLAS,TX (Feb,16,1999) -- MIPS
Technologies,Inc,(NASDAQ,MIPS) and
Texas Instruments (NYSE,TXN)
announced today a relationship to
provide TI access to MIPS Technologies'
processor cores in support of TI's digital
signal processor (DSP) System Level
Integration (SLI) solutions.
Development of DSP
Higher processing speed
Multi-DSP co-operation
More powerful and convenient
development environment
ASIC based on DSP core
Lower price or higher performance price
ratio
Lower power consumption or longer
battery life
Tel,028-83202502
e-mail,qpeng@uestc.edu.cn
