This page is an expression of: https://omen.cs.uni-magdeburg.de/fz/contenido48/cms/front_content.php?lang=2&idart=261&idcat=101
Questionnaire: Multimedia Systems and Multimedia Technology [MMTECH]
Potential questions for oral exams:
Introduction to Multimedia
- What is a medium?
- What is multimedia?
- Please enumerate different types of media related to our perceptual system!
- Please define a continuous-time signal!
- Please define a discrete-time signal!
- Please define a discrete-space based signal!
- Please give example signals for discrete-space, continuous-time and discrete-time signals!
- Please define an analog and digital signal!
- Please define a linear system!
- Which functions are involved in a multimedia system?
- Please enumerate at least three example multimedia applications and classify the types of signal into discrete / continuous! Which senses are effected?
- Please define synchronization, post-synchronization, lip synchronization, dubbing!
- Please explain the multimedia pipeline!
- How do we call the variance in delay in networked multimedia applications and what is the concept behind?
- Real-time audio / video require the timely delivery of data, how can we achieve that data is delivered at the correct rate?
- Please define unicast and muticast! Please describe the layers of multicast!
Image/video and audio capture/sampling, processing and compression
- What is a low pass filter?
- Please define the sampling theorem (Nyquist, Shannon et. al)
- What is the highest frequency we can reproduce from a sampled signal and what does it mean?
- On what depends the quality of Encoding from analog to digital?
- Please explain Capturing, Sampling and Resolution of an image!
- Please explain the RGB color coding and what is the difference to CMY model?
- Please explain Interlacing and its effects!
Image/video and audio capture/sampling, processing and compression - Audio
- Define sound and frequency of audio signals!
- Describe the perception of sound!
- Describe the limits of human hearing?
- Define the digital audio parameters!
- How could sound be represented?
- What is the Fourier Transformation?
- Describe audio sampling!
- Describe the basic sound effects!
- What is the difference between pitch scaling and time scaling?
Image/video and audio capture/sampling, processing and compression - Compression Basics
- Why is compression used?
- How works compression and what types of compression do you know?
- What is meant by asymmetric compression?
- What is Entropy Encoding? What is Source Coding? What is Channel Coding?
- Describe the Run-length Encoding and how it works!
- Describe the Huffman-Encoding!
Image/video and audio capture/sampling, processing and compression - JPEG
- What is JPEG?Which operating modes of JPEG do you know?Which steps have to be followed for JEPG compression?
- What is the JPEG-LS standard and what is the difference to JPEG?
- What is sample-based and block-based coding?
- Describe DCT-based coding?
- Describe the JPEG image compression algorithm!
- Describe Zig-Zag encoding!
- Describe JPEG - entropy coding!
- How does the JPEG decompression works?
Image/video and audio capture/sampling, processing and compression - MPEG
- What is "Line Sampling" and how does it work?Define intraframe and interframe compression!What is the main idea in the MPEG approach?
- Define the basic MPEG parameters!
- Define the 5 part of MPEG-1!
- Define the frame types of MPEG-1!
- What is DSM-CC?
- Which media objects are contained in MPEG-4?
- Define A/V object and A/V scene!