COMPM034 - Multimedia Systems

This database contains the 2017-18 versions of syllabuses. Syllabuses from the 2016-17 session are available here.

Note: Whilst every effort is made to keep the syllabus and assessment records correct, the precise details must be checked with the lecturer(s).

Code COMPM034 (Also taught as COMPGZ05)
Year 4 (Masters)
Prerequisites
Term 2
Taught By Mark Handley (100%)
Aims The aims of this course are to describe the ways in which multimedia information is captured, processed, and rendered, to introduce multimedia quality of service (QoS) and to compare subjective and objective methods of assessing user satisfaction, to analyse the ways in which multimedia data is transmitted across networks, and to discuss privacy and copyright issues in the context of multimedia.
Learning Outcomes The ability to: describe different realisations of multimedia tools and the way in which they are used; analyse the structure of the tools in the light of low-level constraints imposed by the adoption of various QoS schemes (ie bottom up approach); analyse the effects of scale and use on both presentation and lower-level requirements (ie top down approach); state the properties of different media streams; compare and contrast different network protocols and to describe mechanisms for providing QoS guarantees in the network.

Content

Introduction and overview

  • Discrete Cosine Transform
  • Coefficient Coding

Audio Coding

  • Analogue and digital form:
    • Sample rate
    • bits/sample
    • nyquist rate
    • CD audio
  • Compression techniques:
    • PCM
    • ADPCM
    • LPC
    • GSM/CELP
    • MP3/AAC

Video

  • TV Standards:
    • Interlacing vs progressive scan, PAL, NTSC, SECAM Video digitisation
  • Raw Image Representation:
    • RGB, YUV411, YUV422, Indexed color vs true colour
  • Image Compression:
    • GIF, JPEG, Motion JPEG:
  • Video Compression:
    • Motion estimation
    • Motion compensation
  • Video Compression Schemes:
    • H.261, H.263
    • MPEG 1, MPEG 2, MPEG 4
  • Video Adaptation:
    • Sender-side adaptation, buffering, VBR->CBR conversion

System Streams

  • MPEG program and transport streams
  • H.221 framing (for ISDN)
  • IP-based transport:
    • packet loss
    • TCP vs UDP
    • Application-level framing
    • RTP
    • H.261 as example of payload format
    • DCCP
  • Audio/Video synchronization
    • RTCP
    • MPEG system stream

Signalling

  • H.323
  • SIP and SDP
  • RTSP
  • Megaco

OS Issues

  • Buffering
  • Scheduling

Describing Network Traffic

  • Traffic patterns
  • Application requirements
  • QoS parameters and descriptions

Congestion control and Resource Management

  • TCP congestion control
  • Real-time traffic congestion control
  • Queue management:
    • Random Early Detection + other AQM
    • Explicit Congection Notification (ECN)
    • Scheduling mechanisms (FQ, WFQ)

Enhanced Quality of Service

  • Intserv
  • Resource reSerVation Protocol (RSVP)
  • Diffserv

IP Multicast

  • Service Model
  • Layered transmission
  • Multicast congestion control

Digital rights management

  • Legal issues
  • Watermarking

Method of Instruction

Lecture presentations

Assessment

The course has the following assessment components:

  • Written Examination (2 hours, 85%)
  • Coursework Section (15%)

To pass this course, students must:

  • Obtain an overall pass mark of 50% for all sections combined
  • Obtain a minimum mark of 40% in each component worth ≥ 30% of the module as a whole.

Resources

Reading list available via the UCL Library catalogue.