Interactive region of interest scalability for wavelet based scalable video coder

The current wavelet-based scalable video coder supports quality, spatial and temporal scalabilities required for recent multimedia applications. One of the key scalability required by the Joint Video Team (JVT) is Interactive Region of Interest (IROI) scalability. This paper proposes a technique to...

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Vydané v:Journal of real-time image processing Ročník 6; číslo 2; s. 93 - 100
Hlavní autori: Karunakar, A. K., Manohara Pai, M. M.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Berlin/Heidelberg Springer-Verlag 01.06.2011
Springer Nature B.V
Predmet:
Bandwidths
Coders
Computer Graphics
Computer Science
Decomposition
Image coding
Image Processing and Computer Vision
Multimedia
Multimedia Information Systems
Original Article
Pattern Recognition
Signal,Image and Speech Processing
Surveillance
Wavelet transforms
Scalable video coding
Region of interest coding
Wavelet video coding
ISSN:1861-8200, 1861-8219
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Shrnutí:The current wavelet-based scalable video coder supports quality, spatial and temporal scalabilities required for recent multimedia applications. One of the key scalability required by the Joint Video Team (JVT) is Interactive Region of Interest (IROI) scalability. This paper proposes a technique to interactively extract ROI from scalable sub bit-streams. At the encoder, after sub-band decomposition the 3D wavelet tree is divided into N sub tree, each of these has spatial relevance in the original video, which can be decoded interactively. A generalized model for optimal value of N is proposed, that satisfies minimum requirement of the JVT about IROI support at reduced cost of the encoder. The ROI request from decoder along with resolution and bandwidth are mapped to that in the sub-band domain and respective sub-bit-streams are identified. The extractor assigns more bandwidth to ROI and remaining to non-ROI regions. Hence the decoder reconstructs the video with highest quality at the ROI. The proposed IROI functionality enhances the scalability of video coding by additional dimension.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1861-8200
1861-8219
DOI:10.1007/s11554-009-0143-z