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Mesh-based video coding for low bit-rate communications

Kocharoen, P, Ahmed, KM, Rajatheva, RMAP and Fernando, WAC (2006) Mesh-based video coding for low bit-rate communications IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, 52 (2). 611 - 620. ISSN 0098-3063

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In this paper, a new method for low bit-rate content-adaptive mesh-based video coding is proposed. Intraframe coding of this method employs feature map extraction for node distribution at specific threshold levels to achieve higher density placement of initial nodes for regions that contain high frequency features and conversely sparse placement of initial nodes for smooth regions. Insignificant nodes are largely removed using a subsequent node elimination scheme. The Hilbert scan is then applied before quantization and entropy coding to reduce amount of transmitted information. For moving images, both node position and color parameters of only a subset of nodes may change from frame to frame. It is sufficient to transmit only these changed parameters. The proposed method is wellsuited for video coding at very low bit rates, as processing results demonstrate that it provides good subjective and objective image quality at a lower number of required bits.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Technology, Engineering, Electrical & Electronic, Telecommunications, Engineering, video coding, mesh generation, multimedia communications, INTERPOLATION, TRIANGULATION, GENERATION, TRACKING
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Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Depositing User: Melanie Hughes
Date Deposited: 16 Sep 2010 09:10
Last Modified: 23 Sep 2013 18:36

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