Digital Media Processing: DSP Algorithms Using C

947 Pages·2010·11.61 MB·English

by  Hazarathaiah Malepati

Digital Media Processing
DSP Algorithms Using C
Hazarathaiah Malepati
AMSTERDAM•BOSTON•HEIDELBERG•LONDON
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LibraryofCongressCataloging-in-PublicationData
Malepati,Hazarathaiah.
Digitalmediaprocessing:DSPalgorithmsusingC/byHazarathaiahMalepati.
p.cm.
Includesbibliographicalreferencesandindex.
ISBN978-1-85617-678-1(alk.paper)
1.Multimediasystems. 2.Embeddedcomputersystems—Programming. 3.Signalprocessing—Digitaltechniques.
4.C(Computerprogramlanguage). I.Title.
QA76.575.M31522919
006.7–dc22
2009050460
BritishLibraryCataloguing-in-PublicationData
AcataloguerecordforthisbookisavailablefromtheBritishLibrary.
ForinformationonallNewnespublications
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PrintedintheUnitedStates
10 11 12 13 14 10 9 8 7 6 5 4 3 2 1
This book is dedicated to my late father
Mastanaiah Malepati, whose vision and hard
work shaped my career a lot.
Thispageintentionallyleftblank
Contents
Preface ................................................................................... ix
Chapter 1 Introduction ............................................................................. 1
1.1 DigitalMediaProcessing ................................................................................1
1.2 Media-ProcessingAlgorithms...........................................................................2
1.3 EmbeddedSystemsandApplications...................................................................4
1.4 AlgorithmImplementationonDSPArchitectures......................................................5
Part 1 Data Processing ....................................................... 13
Chapter 2 DataSecurity...........................................................................15
2.1 CryptographyBasics ................................................................................... 15
2.2 TripleDataEncryptionAlgorithm..................................................................... 24
2.3 AdvancedEncryptionStandard........................................................................ 37
2.4 Keyed-HashMessageAuthenticationCode........................................................... 50
2.5 Elliptic-CurveDigitalSignatureAlgorithm........................................................... 58
Chapter 3 Introduction toDataError Correction ..................................................87
3.1 Definitions.............................................................................................. 87
3.2 ErrorDetectionAlgorithms............................................................................ 88
3.3 BlockCodes ............................................................................................ 97
3.4 Hamming(72,64)Coder .............................................................................101
3.5 BCH Codes............................................................................................108
3.6 RS Codes ..............................................................................................112
3.7 ConvolutionalCodes ..................................................................................118
3.8 TrellisCodedModulation.............................................................................126
3.9 ViterbiAlgorithm .....................................................................................134
3.10 TurboCodes ...........................................................................................136
3.11 LDPC Codes...........................................................................................143
Chapter 4 ImplementationofError Correction Algorithms ........................................155
4.1 BCH Codes............................................................................................155
4.2 Reed-SolomonError-CorrectionCodes..............................................................166
4.3 RS ErasureCodes .....................................................................................179
4.4 ViterbiDecoder........................................................................................190
4.5 TurboCodes ...........................................................................................199
4.6 LDPC Codes...........................................................................................216
Chapter 5 Lossless DataCompression ............................................................225
5.1 EntropyCoding........................................................................................226
5.2 VariableLengthDecoding ............................................................................231
5.3 H.264VLC-BasedEntropyCoding ..................................................................242
5.4 MQ-Decoder...........................................................................................260
5.5 Context-Based AdaptiveBinaryArithmeticCoding ................................................269
vi Contents
Part 2 Digital Signal and Image Processing ..................................283
Chapter 6 Signals and Systems....................................................................285
6.1 IntroductiontoSignals................................................................................285
6.2 Time-FrequencyRepresentationofContinuous-TimeSignals......................................299
6.3 SamplingofContinuous-TimeSignals...............................................................304
6.4 Time-FrequencyRepresentationofDiscrete-TimeSignals .........................................310
6.5 LinearTime-InvariantSystems.......................................................................312
6.6 GeneralizedFourierTransforms......................................................................317
Chapter 7 Transforms andFilters.................................................................321
7.1 FastFourierTransform................................................................................321
7.2 DiscreteCosineTransform ...........................................................................334
7.3 FilterBasics ...........................................................................................345
7.4 FiniteImpulse-ResponseFilters......................................................................352
7.5 InfiniteImpulse-ResponseFilters ....................................................................363
Chapter 8 Advanced SignalProcessing ............................................................381
8.1 AdaptiveSignalProcessing...........................................................................381
8.2 MultirateSignalProcessing...........................................................................405
8.3 WaveletSignalProcessing............................................................................415
8.4 SimulationandImplementationTechniques.........................................................431
Chapter 9 Digital Communications................................................................437
9.1 Introduction............................................................................................437
9.2 Single-andMulticarrierCommunicationSystems..................................................454
9.3 ChannelEstimation ...................................................................................464
9.4 ChannelEqualization .................................................................................472
9.5 Synchronization .......................................................................................491
9.6 SimulationTechniques................................................................................504
Chapter 10 Image Processing Tools ...............................................................509
10.1 ColorConversion......................................................................................509
10.2 ColorEnhancement ...................................................................................510
10.3 BrightnessandContrastAdjustment.................................................................510
10.4 EdgeEnhancement/SharpeningofEdges............................................................512
10.5 ImageFiltering ........................................................................................512
10.6 EdgeDetection ........................................................................................513
10.7 ImageScaling .........................................................................................525
10.8 ErosionandDilation ..................................................................................531
10.9 ObjectsCornerDetection.............................................................................534
10.10 HoughTransform......................................................................................536
10.11 SimulationofImageProcessingTools ...............................................................540
Chapter 11 Advanced Image Processing Algorithms...............................................553
11.1 ImageRotation ........................................................................................553
11.2 DigitalImageStabilization ...........................................................................562
11.3 ImageObjectsDetection..............................................................................568
11.4 2DImageFilters.......................................................................................575
11.5 FisheyeDistortionCorrection ........................................................................581
11.6 ImageCompression ...................................................................................584
Part 3 Digital Speech and Audio Processing..................................593
Chapter 12 Speech andAudio Processing .........................................................595
12.1 SoundWavesandSignals.............................................................................595
Contents vii
12.2 DigitalRepresentationofAudioSignals.............................................................596
12.3 SignalProcessingwithEmbeddedProcessor........................................................608
12.4 Speech Compression..................................................................................611
12.5 VoIPandJitterBuffer .................................................................................626
Chapter 13 Audio Coding.........................................................................637
13.1 PsychoacousticsandPerceptualCoding .............................................................637
13.2 AudioSignalsCoding.................................................................................642
13.3 MPEG-4AACCodec .................................................................................647
13.4 PopularAudioCodecs ................................................................................651
13.5 AudioPost-Processing................................................................................653
Part 4 Digital Video Processing ..............................................657
Chapter 14 Video Coding Technology .............................................................659
14.1 Introduction............................................................................................659
14.2 VideoCodingBasics..................................................................................661
14.3 MPEG-2Decoder .....................................................................................675
14.4 H.264Decoder ........................................................................................681
14.5 Scalable VideoCoding................................................................................709
Chapter 15 Video Post-Processing ................................................................713
15.1 VideoQualityMeasurement..........................................................................713
15.2 VideoScaling..........................................................................................713
15.3 VideoProcessing......................................................................................728
15.4 VideoTranscoding ....................................................................................737
Index ..............................................................................................745
viii Contents
On the Website
Part 5 Embedded Systems
Chapter 16 EmbeddedSystems ..................................................................... 1
16.1 Introduction...............................................................................................1
16.2 EmbeddedSystemComponents.........................................................................1
16.3 EmbeddedVideoProcessingandSystemIssues...................................................... 20
16.4 Software–HardwarePartitioning ...................................................................... 37
16.5 EmbeddedProcessorsandApplicationRequirements ............................................... 39
Chapter 17 EmbeddedProcessing Applications...................................................... 1
17.1 AutomotiveApplications ................................................................................1
17.2 VideoSurveillanceSystems .............................................................................8
17.3 PortableEntertainmentSystems....................................................................... 11
17.4 DigitalCommunications............................................................................... 12
17.5 DigitalCamera ImagePipe ............................................................................ 20
17.6 HomelandSecurityandHealthCare .................................................................. 22
AppendixA Reference EmbeddedProcessor......................................................... 1
A.1 BlackfinArchitectureOverview.........................................................................1
A.2 OverviewofBlackfinInstructionSet.................................................................. 12
A.3 BlackfinDMA.......................................................................................... 23
A.4 CyclesEstimationwithBlackfin ...................................................................... 25
AppendixB Mathematical Computations onFixed-Point Processors ................................. 1
B.1 NumericDataFixed-PointComputing..................................................................1
B.2 GaloisFields............................................................................................ 10
AppendixC Look-upTables ......................................................................... 1
References........................................................................................... 1
Exercises ............................................................................................ 1
Preface
The title of this book could well have been Digital Media Processing Algorithms: Efficient Implementation
TechniquesinC,asitisnotonlyaboutdigitalmediaprocessingalgorithms,butalsocontainsmanyimplementa-
tiontechniquesformostalgorithms.Themainpurposeofitistofillthegapbetweentheoryandtechniquestaught
at universities and that are required by the software industry in the digital processing of data, signal, speech,
audio, images,and video onan embedded processor. The book serves as a bridge totransitfrom thetechnical
institute to the embedded software development industry. Many powerful algorithms in current cutting-edge
technologiesareanalyzed, andsimulationandimplementationtechniquesarepresented.
Digital media processing demands efficient programming in order to optimize functionality. Data, signal,
image, audio, and video processing—some or all of which are present in all electronic devices today—are
complexprogrammingenvironments.Optimizedalgorithms(step-by-stepdirections)aredifficulttocreate, but
they can make all the difference when developing a new application. This book discusses the most recent
algorithmsavailabletomaximizeyourprogramming,whilesimultaneouslykeepinginmindmemoryandreal-
time constraints of the architecture with which you are working. General implementation concepts can be
integratedintomanyarchitecturesthatyoufindyourselfworkingwithonaspecificproject.
My interest in writing a book on digital media processing algorithms derives from reading literature in the
fieldandworkingonthosealgorithms.Thisbookcannotreplacetheliteratureonthebackgroundtheoryrelated
to the algorithms; in fact, what is written here is largely incomplete without it. Although I do not rigorously
discuss the theory and derivation of equations and theorems, a brief introduction and basic mathematics are
providedformostofthealgorithmspresented.
Typically,developersofembeddedsoftwaremoduleswanttoknowthebasicfunctionalityofanalgorithmand
simulationtechniques,inadditiontowhetheranytechniquesare availabletoefficientlyimplementaparticular
algorithm.Mostdevelopersareproficientwithequationsandalgorithmsasaresultofuniversitytraining;however,
theefficientimplementationofsuchalgorithmsrequiresindustryexperience. Butemployers,ofcourse, expect
developers to immediately begin work. Often they provide training for writing quality software, but not for
writingefficientsoftware.Softwareengineerslearnhowtodothisintime,suchasduringthecourseofworking
onafewefficientlyimplementedmodulesorobservingaseniorengineer’simplementationmethods.Manysuch
techniquestoefficientlysimulateandimplementdigitalmediaprocessingalgorithmsaredescribedinthisbook.
Today many algorithmsare available on the Internet, and the software for a number of them isavailable in
thepublicdomain.Buttheinformationavailableonthewebistheoryoriented,andwemayobtainonlypieces
ofthesoftwarehereandthere andnotthecompletesolution.Sometimes,wecan obtainthecompletesoftware
foraparticularalgorithmthatworkswell,butitmaybeinefficientforuseinaparticularproject.Consequently,
usershave toenhance softwareefficiency bypurchasingitfroma third-partysource. What’shere providesthe
informationneededtodevelopefficientsoftwareformanyalgorithmsfromscratch.
Thebookisaimedatgraduateandpostgraduatestudentsinvariousengineeringsubdisciplinesandsoftware
industryjunior-levelemployeesdevelopingembeddedsystemssoftware.Onlycollege-levelknowledgeofmath-
ematics is required to understand the equations and calculations. Knowledge of ANSI C is a prerequisite for
thisbook.Knowledgeofmicrocontroller,microprocessor,ordigitalsignalprocessing(DSP) architectureswill
provideanaddedadvantagesothatyoucanunderstandimplementationskillsabitfaster.
UnlikeotherDSPalgorithmbooksthatconcentratemainlyonbasicoperations,suchastheFouriertransforms
anddigitalfilters,thisbookcoversmanyalgorithmscommonlyusedinmediaprocessing.Formostofthem,this
book provides full details of flow, implementationcomplexity, and efficient implementationtechniques using
ANSIC.Inaddition,simulationresultsareprovidedforselectedalgorithms.
ThisbookusestheAnalogDevices,Inc.(ADI)Blackfinprocessor(BF5xxseries)asthereference embedded
processor, and it discusses implementationcomplexity of all algorithmscovered with respect to this amazing
general-purpose DSP processor. The Pcode notation (meaning pseudocode or program code) is used to flag
simulationcode.