NDLI: MPEG Motion Picture Coding With Long-Term Constraint on Distortion Variation

Content Provider	IEEE Xplore Digital Library
Author	Kai Wang Woods, J.W.
Copyright Year	1991
Abstract	A highly desirable feature in storage video applications is uniform quality. Variable bit rate (VBR) coding has the potential to produce nearly constant quality throughout an entire movie. This can be defined as a bit allocation problem with a long-term constraint on distortion variation. We consider the optimal bit allocation with multiple constraints including disk capacity and the distortion bounds on the individual frames. We find the theoretical optimality conditions and propose a practical iterative solution based on the Lagrangian methods. While minimizing average distortion and distortion variation cannot be achieved simultaneously for a given bit budget, the proposed algorithms are able to efficiently balance the tradeoff between the two goals. The computational complexity of the exact rate-distortion (R - D) functions for real movies is addressed by a statistical R - D model proposed in this work. Based on the generic block-based motion compensated transform coding theories, the model is formed by a rate-quantization (R - Q) function and the corresponding distortion-quantization (D - Q) function. A novel two-pass MPEG-2 VBR encoder based on the proposed algorithms is developed for coding with long-term nearly constant quality. Experimental results are promising and the encoder effectively achieves the fit-to-disc function and at the same time controls objective quality variation. By incorporating basic subjective coding techniques into the encoder, significant visual quality improvement is observed during the subjective tests.
Sponsorship	IEEE Circuits and Systems Society
Starting Page	294
Ending Page	304
Page Count	11
File Size	1084047
File Format	PDF
ISSN	10518215
Volume Number	18
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-01
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 pictures Bit rate Image coding Transform coding Video compression Lagrangian functions Rate-distortion Image processing DVD Upper bound variable bit rate (VBR) Constant quality distortion-constrained fit-to- disk MPEG perceptual coding rate-distortion fit-to-disk VBR constant quality
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Media Technology

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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