Minimizing MPEG-4 Sprite Coding-Cost Using Multi-Sprites


Farin, Dirk ; With, Peter H. N. de ; Effelsberg, Wolfgang


Additional URL: http://vca.ele.tue.nl/publications/data/Farin2004a...
Document Type: Conference or workshop publication
Year of publication: 2004
Book title: Visual Communications and Image Processing 2004 / SPIE
Page range: 234-245
Place of publication: San Jose, Calif.
Publishing house: SPIE
ISBN: 0-8194-5211-4
Publication language: English
Institution: School of Business Informatics and Mathematics > Praktische Informatik IV (Effelsberg -2017)
Subject: 004 Computer science, internet
Abstract: Object-oriented coding in the MPEG-4 standard enables the separate processing of foreground objects and the scene background (sprite). Since the background sprite only has to be sent once, transmission bandwidth can be saved. This paper shows that the concept of merging several views of a non-changing scene background into a single background sprite is usually not the most efficient way to transmit the background image. We have found that the counter-intuitive approach of splitting the background into several independent parts can reduce the overall amount of data. For this reason, we propose an algorithm that provides an optimal partitioning of a video sequence into independent background sprites (a multi-sprite), resulting in a significant reduction of the involved coding cost. Additionally, our algorithm results in background sprites of better quality by ensuring that the sprite resolution has at least the final display resolution throughout the sequence. Even though our sprite generation algorithm creates multiple sprites instead of a single background sprite, it is fully compatible with the existing MPEG-4 standard. The algorithm has been evaluated with several test-sequences, including the well-known Table-tennis and Stefan sequences. We were able to reduce the total coding cost by factors of about 2.7 or even higher.

Dieser Eintrag ist Teil der Universitätsbibliographie.




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Farin, Dirk ; With, Peter H. N. de ; Effelsberg, Wolfgang Minimizing MPEG-4 Sprite Coding-Cost Using Multi-Sprites. 234-245 In: Visual Communications and Image Processing 2004 / SPIE (2004) San Jose, Calif. [Conference or workshop publication]


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