Koding og komprimering av mediedata
2013-2014 - IMT4451 - 10sp

Anbefalt forkunnskap

IMT4202 Image Processing and Analysis

Forventet læringsutbytte

This course is a graduate-level introductory course to the fundamentals of coding and compression of media data. It focuses on the fundamental principles of coding and compression and discusses several of the existing audio, image and video compression standards. On completion of this course the student will:

Knowledge 

  • posses an understanding of the fundamental characteristics of data coding systems systems used widely in digital recording formats, software and hardware encoders.
  • understand the human visual system characteristics and deficiencies that can be exploited to compress visual media efficiently.
  • understand the redundancies in visual content and audio content and how to remove it when encoding this type of material. 
  • understand how subjective as well as objective metrics work, for the evaluation of media quality.
  • possess advanced knowledge of basic algorithms for lossless and lossy audio, image and video compression techniques and standards including preprocessing, energy compaction using transforms,  manipulation, filtering, etc.
  • posses advanced knowledge of video sequences content and how they differ from still images and how to exploit the inherent redundancies in it to compress this type of data. 
  • possess specialized insight and good understanding of the different media coding standards and their differences.

Skills 

  • be able to use mathematical techniques for encoding different types of media and demonstrate the use of tools such as matlab, wavelets toolbox, to solve problems in data coding and compression.
  • be able to to explore a range of practical techniques, by developing their own simple encoding functions using library facilities and tools such as Matlab.
  • be able to implement the techniques in the topics studied and compare their performances in certain coding tasks.
  • be able to use relevant and suitable methods when carrying out research and development activities in the area of media coding.
  • be able to present, to his colleagues and experts, his work in English and defend his ideas. 

General competence 

  • have the learning skills to continue acquiring new knowledge and skills in a manner that is largely self-directed
  • be able to contribute to innovative thinking and innovation processes

Emnets temaer

  •  Motivation for media data compression
  •  Media data redundancy and compression
  •  Fundamental digital image representation and processing
  •  Sampling and quantization
  •  Entropy coding, run-length coding, variable-length coding
  •  Lossy and lossless compression techniques
  •  Transform-based coding
  •  Compression of audio, image, and video data
  •  File formats and standards
  •  JPEG, JPEG2000
  •  Motion estimation, motion compensation, motion compensated prediction
  •  H.261, H.263, MPEG-1, MPEG-2, MPEG-4, and MPEG-7
  •  Image quality

Pedagogiske metoder

Forelesninger
Nettstøttet læring
Oppgaveløsning
Prosjektarbeid

Pedagogiske metoder (fritekst)

Emnet tilbys både som et ordinært campus-emne og som et emne som tilbys fjernstudenter på en fleksibel måte. Forelesningsnotater, e-forelesninger og andre typer av e-læringsmateriell vil bli tilbudt gjennom en læringsplattform. Kommunikasjon mellom lærere og studenter, og mellom studenter, vil bli understøttet av læringsplattform.

Vurderingsformer

Skriftlig eksamen, 4 timer
Vurdering av prosjekt(er)

Vurderingsformer

 Skriftlig eksamen, 4 timer (teller 60%)
 Vurdering av prosjekt(er) (teller 40%)
 Hver av delene må bestås separat.
 

Karakterskala

Bokstavkarakterer, A (best) - F (ikke bestått)

Sensorordning

  •  Ekstern+intern sensor retter alle besvarelser
     (skriftlig eksamen)
     
  •  Intern vurderer prosjekt

Utsatt eksamen (tidl. kontinuasjon)

Ordinær kontinuasjon på skriftlig eksamen

Tillatte hjelpemidler (gjelder kun skriftlig eksamen)

Godkjent kalkulator

Engelsk ordliste

Obligatoriske arbeidskrav

Obligatoriske øvingsoppgaver

Læremidler

Oppgis ved semesterstart

Erstatter

IMT4001 - Digital medierepresentasjon