Research Topic:
Entropy Coding for Scalable Video Codecs using Context Modeling
Research Scope:
During the last decade, transmissions of video over various networks have
enormously increased. Due to fact that compressed video has to traverse
networks with different bandwidths, and has to be displayed on devices with
different display capabilities, the need for highly efficient and flexible
coding technology, which meets these requirements, is increasing. An
emerging approach is scalable video coding, in which extraction of a lower
fidelity video is possible by simple parsing of the compressed bit-stream,
which contains high-fidelity video.
Scalability is usually desired in spatial, temporal and quality domain.
Spatio-temporal scalability is enabled by applying a combination of 2D
discrete wavelet transform and Motion Compensated Temporal Filtering (MCTF).
Quality scalability is achieved by bit-plane coding of wavelet coefficients
resulting from the spatio-temporal transform.
In this research work, an efficient entropy coder for wavelet coefficients
and motion data will be developed. In order to exploit statistical
inter-symbol dependencies, context modelling will be used with adaptive
probability estimations within each context.
Research Interests: Scalable video coding and transmission,
universal multimedia access, surveillance-centric coding, quality evaluation
in image and video processing
T. Zgaljic, N. Sprljan, and E. Izquierdo, "Bit-stream allocation methods for scalable video coding supporting wireless communications," Signal Processing: Image Communication, vol. 22, iss. 3, pp. 298–316, 2007.
Conferences
T. Zgaljic, M. Mrak, and E. Izquierdo, "Influence of downsampling filters characteristics on compression performance in scalable video coding," in Proc. 4th International Conference on Visual Information Engineering (VIE), 2007,
T. Zgaljic, M. Mrak, and E. Izquierdo, "Towards optimised context selection in scalable wavelet based video coding," in Proc. 15th European Signal Processing Conference (EUSIPCO), 2007,
T. Zgaljic, M. Mrak, and E. Izquierdo, "Optimised compression strategy in wavelet-based video coding using improved context models," in Proc. 14th IEEE International Conference on Image Processing, 2007,
T. Zgaljic, M. Mrak, N. Sprljan, and E. Izquierdo, "An entropy coding scheme for multi-component scalable motion information," in Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2006,
T. Zgaljic, N. Sprljan, and M. Mrak, "Bit-stream allocation methods for wavelet based scalable video coding," in Proc. 2nd International Mobile Multimedia Communications Conference (Mobimedia), 2006,
T. Zgaljic, N. Sprljan, and E. Izquierdo, "Bitstream syntax description based adaptation of scalable video," in Proc. 2nd European Workshop on the Integration of Knowledge Semantic and Digital Media Technologies (EWIMT), 2005,
T. Zgaljic, N. Sprljan, and E. Izquierdo, "Scalable video adaptation based on bitstream syntax description," in Proc. 2nd Workshop on Immersive Communication and Broadcast Systems (ICOB), 2005,
Technical Reports
N. Sprljan, M. Mrak, and T. Zgaljic, "Enhancements to scalable video coding framework," aceMedia project, 2006.
T. Zgaljic, N. Sprljan, and M. Mrak, "Specification of scalable metadata coding framework," aceMedia project, 2006.
Contributions to Standards
T. Zgaljic, M. Mrak, Y. Andreopoulos, and E. Izquierdo, "Proposal to draft a Call for Evidence Test in AIC," ISO/IEC JTC1/SC29/WG1, Tech. Rep. N4190, 2007.
N. Adami, E. Izquierdo, R. Leonardi, M. Mrak, A. Signoroni, and T. Zgaljic, "Efficient wavelet-based video compression," ISO/IEC JTC1/SC29/WG1, N3954, 2006.
M. Mrak, N. Sprljan, T. Zgaljic, N. Ramzan, S. Wan, and E. Izquierdo, "Performance evidence of software proposal for wavelet video coding exploration group," ISO/IEC JTC1/SC29/WG11, M13146, 2006.
N. Sprljan, M. Mrak, T. Zgaljic, and E. Izquierdo, "Software proposal for wavelet video coding exploration group," M12941, 2006.
T. Zgaljic, M. Mrak, N. Ramzan, and E. Izquierdo, "Scalable coding using motion adapted wavelet transform," ISO/IEC JTC1/SC29/WG1, N4048, 2006.
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