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The Hong Kong Polytechnic UniversityDepartment of

Electronic and Information Engineering

Research and Teaching Activities

Daniel P.K. Lun, PhDDept of EIE HKPolyUDept.of EIE, HKPolyU, Hong Kong

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Outline

Introduction to the Department of Electronic d I f ti E i i f th Hand Information Engineering of the Hong

Kong Polytechnic UniversityResearch ActivitiesLearning and Teaching Activities

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

About the UniversityAbout the University

1937 Opened as “Government Trade

Over 70 Years of History

School” in Wood Road, Wan Chai1947 Became the “Hong Kong Technical

College” after World War IICollege after World War II1957 New premises in Hung Hom opened1972 Formal establishment of the “Hong

Kong Polytechnic”1994 Assumed full university status and

renamed as “The Hong Kong

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Polytechnic University”

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

The Electronic and Information Engineering Department (EIE)g g p ( )

Established in 1974 (formerly known as the D t t f El t i E i i )Department of Electronic Engineering)Provided contemporary courses with modern subjectssubjects

Doctor of Philosophy (PhD)Engineering Doctorate (EngD)M t f Phil h (MPhil)Master of Philosophy (MPhil)Master of Science (MSc) / Postgraduate Diploma (PgD)BEng (Honours) in Electronic and Information EngineeringBS (H ) D i I d M l i di T h l i

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BSc (Honours) Degree in Internet and Multimedia TechnologiesHigher Diploma in Electronic and Information Engineering

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Ed i l FEducational FocusEmphasizes applicationsEmphasizes applicationsDevelops creativity and innovationAll-rounded education: problem solving skills, criticalAll rounded education: problem solving skills, critical thinking, cross disciplinary skills, global outlook, Practice work-integrated education

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Part A: Research ActivitiesPart A: Research Activities

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Current Research Focuses

Telecommunications: Mobile Communication Systems, Power Control in Cellular Systems, Indoor Wireless Systems, Coding, Communication Networks

Multimedia Signal Processing: Image and Video Compression, Biometrics, Face Recognition, Bioinformatics, Information Technology in Medicine

Optical Communications, Optoelectronics & Photonics: GaN (III-V) Devices, p , p ( )Characterizations, UV Detectors, Optical Sensors, Optical Communication Networks

Nonlinear Systems: Complex Networks Applications in Traffic Modeling, Time-Series Analysis, Biomedical Signal Identification

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Analysis, Biomedical Signal Identification

Power Electronics: Switching Power Supplies, DC-DC Converters, Power Supplies for Lighting, Electronic Ballasts, LED Power Supplies

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Research Centres/GroupsResearch Centres/Groups1. Centre for Signal Processing2 Applied Nonlinear Circuits and Systems2. Applied Nonlinear Circuits and Systems

Research Group3. Communications Research Group3. Communications Research Group4. Thin Film Optoelectronics Research Group

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Research OutputsOutputs 2002/03 2003/04 2004/05 2005/06 2006/07Outputs (Average per faculty member)

2002/03 2003/04 2004/05 2005/06 2006/07

Books, Book Chapters, Journal 3 12 3 05 3 25 4 17 3 51Books, Book Chapters, Journal Papers

3.12 3.05 3.25 4.17 3.51

Conference Papers 3.37 4.33 3.82 2.8 3.73

Total 6.49 7.38 7.07 6.97 7.24

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Industrial & Application-Oriented ProjectsNovel applications of existing technologies UWB developed in EIE

Communications: ultra-wideband indoor radios, RF systems, optical communicationsPhotonics: UV sensors interdisciplinaryPhotonics: UV sensors, interdisciplinary applications, environmental applicationsMultimedia: informatics applications, voice bi t i di l i f ti d di l

UV detector

biometrics, medical informatics and medical imaging, codecElectronics: new lighting devices (LEDs), advanced packaging, power supplies for implantable devices, sensor networks

LED lights developed in EIE

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Patents filed and granted in past 5 years: 16 (total)

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Achievement HighlightsWinning Power Supply

Distinguished International Research Fellow, University of Calgary Canada Grand Champion, Efficiency Challenge,

California Energy Commission 2004University of Calgary, Canada2 IEEE FellowsFellow of Australian Academy of Technological Sciences and EngineeringTechnological Sciences and Engineering IEEE Distinguished LecturerGrand Champion, Efficiency ChallengeC P i E ll i M di lCrump Prize on Excellence in Medical EngineeringIEEE Transactions on Power Electronics Best P A dPaper AwardIEEE Signal Processing Society Honorable Mention Award

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International Journal of Circuit Theory & Applications Best Paper Award

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Oth I tOther ImpactsKeynote Addresses / Invited Tutorials at

International ConferencesIEEE European Conf. on Circuit Theory and Design, Cork, Ireland 2005IEEE International Symposium on CircuitsIEEE International Symposium on Circuits and Systems, Bangkok, Thailand 2003IEEE International Conf. on Networks and Signal Processing, Nanjing 2003

:Editorships of International Journals

IEEE Transactions on Circuits andIEEE Transactions on Circuits and Systems Part I / Part IIIEEE Transactions on Image Processing

IEEE T ti I f ti

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IEEE Transactions on Information Technology in Medicine

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Applied Nonlinear Circuits and Systems Research Applied Nonlinear Circuits and Systems Research GroupGroupLeader: Leader: Prof. Michael TseProf. Michael Tse

The Applied Nonlinear Circuits and Systems Research Group has established itself, with 17 years of experience, as a Pioneer in computer-aided analysis and design of power converters.

Major Research AreasMajor Research Areas• Power Electronics• Circuit theory• Sliding-mode control applications• Chaos-based communications• Disease propagation dynamics• Time-series analysis and applications to

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biomedical signal processing

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Communication Research GroupCommunication Research GroupGroup Leader: Group Leader: Prof. Alex WaiProf. Alex Wai

Communications, especially mobile communications and networking, has experienced a phenomenal growth during the past two decades and this growth is projected to continue in the foreseeable future. The Group undertakes research in different areas of communications

Main Topics of ResearchWi l i ti

undertakes research in different areas of communications.

• Wireless communications• Electromagnetics• Chaos-based spread-spectrum

communicationscommunications • High Speed Networking• Optical fiber communication systems

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Thin Film Optoelectronics Research GroupThin Film Optoelectronics Research GroupGroup Leader: Group Leader: Prof. C. SuryaProf. C. Surya

The Thin Film and Optoelectronics Research Group focuses on applied experimental and theoretical research for the development of modern semiconductor optoelectronic devicesof modern semiconductor optoelectronic devices.

Selected Current ProjectsCooperati e Research Centre for the• Cooperative Research Centre for the development of III-V nitride based optoelectronic components

• Fabrication and characterization of GaN-b d bl LED d h t t tbased blue LEDs and heterostructures

• Non-destructive measurement of longitudinal dispersion of an optical fiber

• Optimum design of dispersion profile of ti l i ti t

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an optical communication system• Realization of high-density information

storage using ferroelectric thin films

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Centre for Signal ProcessingCentre director: Centre director: Prof. W.C. SiuProf. W.C. Siu (15 academic staff members from different Departments)

Full Spectrum of Research Work in Signal Processing

• Fundamental studies on transforms, high-performance DSP, and ASIC Design

• Image Processing and Video Technologies• Speech enhancement, recognition and

speaker Identification• Pattern recognition• Information transfer and storage• Biomedical signal processing

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• Intelligent systems, fuzzy logic & neural networks

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

R d f R k d i i i

PublicationsC t b h bli h d th 700 t h i l ti l

Records of Recent work and activities:

Centre members have published more than 700 technical articles(1999-2005)

Total number of books/book chapters: 39Total number of international journal papers: 239j p pTotal number of national journal papers 15Total number of conference papers: 418

(Sample journals and conferences: IEEE Transactions (on IP, SP and VT),Pattern Recognition, Signal Processing: Image Comm., etc., ICASSP, ISCAS,atte ecog itio , Sig al ocessi g: age Co ., etc., C SS , SC S,ICIP, CPM, etc.)

Industrial+Government+University Funding:HK$ 38 000 000 (1999-2005)HK$ 38,000,000 (1999 2005)Activities of Members:

Keynote speakers of international conferences, editors/associate editors of

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international journals, members of technical committees, etc.

Successfully produced 54 PhD/MPhil Graduates (1999-2005)

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Intelligent Multimedia Home

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Low cost home appliance control using power linep

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Voice Commanding

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Access Control by Face recognition

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Remote Monitoring and Control

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Remote Monitoring and Control

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Image Compression, Video Coding Streaming andCoding, Streaming and

Transcoding

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

W l t B d I C d JPEG2000Wavelet Based Image Coder – JPEG2000JPEG 2000 is a wavelet-based image coder intended to

t i di tcreate a new image coding system for different types of still images with different characteristicswith different characteristics allowing different imaging models

25JPEG2000 at 0.125 bppJPEG at 0.125 bpp

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Content-based video coding

Real-timeCode the moving

Combine with theReal time

object segmentation

moving objects with video codec

with the background

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Transmit Receive

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Video Interpolation

While video broadcasting has entered into the high definition era, the previously prepared low definition videos do not meet the resolution requirementNeed interpolation from Low-Def to Hi-DefT diti l h h i i i i thTraditional approaches emphasize on maximizing the signal to error ratio do not carefully consider human perceptionThe proposed approach enhances edges and sharp transitions in the images that make the resulting video look better

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InterpolationDemo

look better

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Video Transcoding: Transcoding the H.263 to the H 264 within the Transform Domainthe H.264 within the Transform Domain

Why transcoding from H.263 to H.264 ?

• Complete migration to the new H.264 will take several years since H.263 and MPEG are widely used in many multimedia applications nowadays. pp y

• This creates an important need for transcodingtechnologies that convert the widely available H.263 compressed ideos to H 264 compressed formatcompressed videos to H.264 compressed format.

• The proposed approach directly converts the DCT coefficients in H 263 to integer transform coefficients in

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coefficients in H.263 to integer transform coefficients in H.264 that reduces a lot of computational errors compared with the conventional methods.

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Original Movie Conventional requantization

29Our H.263 to H.264 Video Transcoder

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Signal EnhancementS g a a ce e t

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Application 1: Block transform images deblockingdeb oc g

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Singularities introduction over smooth area

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Original JPEG

CLS ProposedWTMS

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

2-D GCV Proposed ApproachApplication 2: Blind Image Restoration

DPRT

2-D FFT 1-D FFT

1-D FFT. . .

P+1

IDPRT

Complexity: O(N2log2N2) Complexity: O((P+1)Nlog2N)where N >> P

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w e ewhere P is the size of the PSF

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Results

O i i Bl d d i i

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Original Blurred and noisy image (BSNR = 30dB)

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Restored image using Restored image using

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the proposed approach(SER = 22.66dB)

GCV (SER = 22.01dB)

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Noise 2 D GCV Proposed DPRTNoiselevel

2-D GCV Proposed DPRT approach

No of Flops / I*F No of Flops / I*F +BNSR

No. of iterati-ons (I)

Flops / iter. (F)

I*F No. of iterati-ons (I)

Flops / iter. (F)

I*F + DPRT

40dB 361 5.5x106 2x109 1,515 40,759 6.3x107

30dB 318 5 5x106 1 8x109 1 648 40 759 6 8x10730dB 318 5.5x106 1.8x109 1,648 40,759 6.8x107

Comparison in terms of arithmetic operations required

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Comparison in terms of arithmetic operations required

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Application 3: Speech Enhancement

In real environment speech obtained from theIn real environment, speech obtained from the microphone can be very noisySuch noise can be wideband hence cannot beSuch noise can be wideband hence cannot be removed by simply low pass filtering it Enhancement can be done by closelyEnhancement can be done by closely examining the power spectrum of the speech

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

It is a topic that has been researched for over 40 years

Still no final solution!It is because

Noise level ↓ → speech intelligibility ↓o se e e speec te g b tySpeech intelligibility ↑ → noise level ↑

Current approaches are to strive a goodCurrent approaches are to strive a good balance between noise level and speech intelligibility

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intelligibility

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Original Noisy

40Using Wiener filter The proposed method

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Part B: Learning and Teaching ActivitiesActivities

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Undergraduate Programmes

Bachelor of Engineering (Honours) in ElectronicBachelor of Engineering (Honours) in Electronic and Information EngineeringBachelor of Science (Honours) in Internet andBachelor of Science (Honours) in Internet and Multimedia Technology

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Modes of Study (1)

Foundation Year

Year 1

Year 2 Exchange Study in an overseas Year 2

Year 3

Exchange Study in an overseas university for one semester

Graduate

43For BEng(Hons) in EIE and BSc(Hons) in IMT

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Modes of Study (2)

Sandwich mode of Foundation Year

Year 1

Sandwich mode of study: total 5 years

Year 1

Year 2

Year 3: Sandwich Optional: Work in a company for one year

Year 4

year

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GraduateFor BEng(Hons) in EIE and BSc(Hons) in IMT

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Major study areasMajor study areas

Circuits and MicroelectronicsCommunication EngineeringC E i iComputer EngineeringInformation T h lTechnology

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Various Learning Experiences

ExchangeIndustrial center trainingIndustrial trainingPreferred Graduate SchemeIndustrial ProjectsjStudy TourCommunity Services

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Community ServicesProblem-based learning

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Problem-Based Learning

The Department has been implementing problem-based learning (PBL) for years to improve students’ understanding and retention of the learnt knowledge, P bl b d l iProblem-based learning

Originally developed for medical school education in 70’sTeach students both content and problem solving skills through engagement with authentic real-world problems

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Ch i i f PBLCharacteristics of PBL [1]

Problem Analysis

Self-directedTestSol tion LearningSolution

BrainstormingDiscussion

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[1] Massa, et al, “Problem-based Learning in Technology Education”, HI-TEC 2009, Scottsdale, AZ, July 2009

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

B fi f PBLBenefits of PBL [1]

Promote “deep learning” Improve critical thinking and problem solving skillsImprove motivation for learningImprove students’ ability to transfer skills p o e s ude s ab y o a s e s sand knowledge to new situations

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

PBL I l d i EIEPBL Implemented in EIE

A semi-PBL approach has been usedLearning occurs collaboratively in small groupsLearning occurs collaboratively in small groupsProblems are presented after some formal introduction has been presented to studentspStudents are required to work out the rest via self-directed learningI t t t f ilit t t ti t thi i tInstructor acts as a facilitator starting at this point providing focused instruction and guidance on an “as needed” based

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

E l I d P jExample: Integrated Project

All year-2 students are required to take a 3 credits subject, namely Integrated Projectcredits subject, namely Integrated ProjectIt is a project based subject, i.e. the whole subject is about doing a projectObjectives:

Apply knowledge acquired in other subjects in an integrated mannerintegrated mannerDeepen the understanding of the learnt knowledgeProvide students with the experience of project

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jdevelopment

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Ch ll dChallenges to students

TechnicalSoftware developmentSoftware developmentSystem integrationSystem troubleshooting

Non-technicalTeamworkTime and resource managementTime and resource managementProblem solvingCommunications

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

P j T iProject Topic

To ensure all students will work out the solution by themselves, the project topic is changed every yearIn 2007/08 the topic was “Robot Car Race –In 2007/08, the topic was Robot Car Race –Augmented Reality”

To enable first person xperience in a real car raceLive video is combined with 3D graphics

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Architecture of the Car RacingArchitecture of the Car Racing SystemA steering wheel

with a marker

Motion Tracking Server

Network

Game Server(Mindstorms Control )

Motion Tracking System

Marker

Students’ program

(Mindstorms Control )

Video Server

Marker Bluetooth radio(Control car movement)

Server

3D GraphicsEngine

Video +3D Graphics

RFLego Mindstorms

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EngineRF(Transmit video)

Lego Mindstorms and a wireless video camera

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

S h d l d ASchedule and ArrangementGrouping and Job assignment

2 students in a group2 students in a group Each group member has been pre-assigned a task to achieveThe results have to be combined to complete the project –need collaboration

Lectures - 6 lectures in the first 3 weeks Laboratory work

Each group member does different laboratory works (3 labs)The labs are to familiar them with the basic setup in the projectHence each group member does not know the details of the task of his/her partner – force them to collaborate

ProjectProjectStudents need to figure out the best control strategy and the best graphics add onto the game

Meetings

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gTwice per week after the lectures and labs For instructor to give advices to students

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

A W i h iAssessment WeightingA t T W i htiAssessment Type WeightingLab exercises 20%Logbook / Progress report / Final report 30%Logbook / Progress report / Final report / Presentation

30%

Result in Qualifying Round 15%Q y g

Result in the Final 25%

Winners of the race (to reward those putting extra effort in the project)

(max 16% bonus)

Project Management 10%

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Project Management 10%

The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Video clips of 2007/08 interactive game design project competition

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The Hong Kong Polytechnic UniversityDepartment of Electronic and Information Engineering

Thank you for your attention andand

Welcome any collaboration onWelcome any collaboration on the above topics

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