NDLI: Three-dimensional subband coding with motion compensation

Content Provider	IEEE Xplore Digital Library
Author	Ohm, J.-R.
Copyright Year	1992
Abstract	Three-dimensional (3-D) frequency coding is an alternative approach to hybrid coding concepts used in today's standards. The first part of this paper presents a study on concepts for temporal-axis frequency decomposition along the motion trajectory in video sequences. It is shown that, if a two-band split is used, it is possible to overcome the problem of spatial inhomogeneity in the motion vector field (MVF), which occurs at the positions of uncovered and covered areas. In these cases, original pixel values from one frame are placed into the lowpass-band signal, while displaced-frame-difference values are embedded into the highpass band. This technique is applicable with arbitrary MVF's; examples with block-matching and interpolative motion compensation are given. Derivations are first performed for the example of two-tap quadrature mirror filters (QMF's), and then generalized to any linear-phase QMF's. With two-band analysis and synthesis stages arranged as cascade structures, higher resolution frequency decompositions are realizable. In the second part of the paper, encoding of the temporal-axis subband signals is discussed. A parallel filterbank scheme was used for spatial subband decomposition, and adaptive lattice vector quantization was employed to approach the entropy rate of the 3-D subband samples. Coding results suggest that high-motion video sequences can be encoded at significantly lower rates than those achievable with conventional hybrid coders. Main advantages are the high energy compaction capability and the nonrecursive decoder structure. In the conclusion, the scheme is interpreted more generally, viewed as a motion-compensated short-time spectral analysis of video sequences, which can adapt to the quickness of changes. Although a 3-D multiresolution representation of the picture information is produced, a true multiresolution representation of motion information, based on spatio-temporal decimation and interpolation of the MVF, is regarded as the still-missing part.<>
Sponsorship	IEEE Signal Processing Society
Starting Page	559
Ending Page	571
Page Count	13
File Size	1800623
File Format	PDF
ISSN	10577149
Volume Number	3
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion compensation Video sequences Spatial resolution Signal resolution Energy resolution Mirrors Filters Signal synthesis Frequency synthesizers Encoding
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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