NDLI: Boundary macroblock padding in MPEG-4 video decoding using a graphics coprocessor

Content Provider	IEEE Xplore Digital Library
Author	Garg, R. Chung, C.Y. Donglok Kim Yongmin Kim
Copyright Year	1991
Abstract	MPEG-4 is the latest multimedia coding standard that supports object-based coding and manipulation of natural video and synthetic graphics objects. Due to its various features and high coding efficiency, MPEG-4 is becoming popular in video streaming applications. Many graphics coprocessors provide the acceleration of inverse discrete cosine transform (IDCT) and motion compensation for real-time video decoding. Therefore, it is desired to use the graphics coprocessors to accelerate MPEG-4 video decoding as well. Since MPEG-4 video decoding for rectangular video objects is similar to other video coding standards, e.g., MPEG-2, the IDCT and motion compensation can still be executed on the graphics coprocessors. However, we have found that boundary macroblock padding, which is an essential processing step in decoding arbitrarily shaped video objects, could not be efficiently accelerated on the graphics coprocessors due to its complexity. Although we can implement the boundary macroblock padding on the host processor, the frame data processed on the graphics coprocessor need to be transferred to the host processor for padding. In addition, the padded data on the host processor need to be sent back to the graphics coprocessor to be used as a reference for subsequent frames. To avoid this overhead, we present two approaches of boundary macroblock padding. In the first approach, the boundary macroblock padding is partitioned into two tasks, one of which the host processor can perform without the overhead of data transfers. In the second approach, we propose two new instructions and an algorithm that can be easily adopted in the next-generation graphics coprocessors or mediaprocessors, which gives a performance improvement of up to a factor of nine compared to that with the Pentium III.
Sponsorship	IEEE Circuits and Systems Society
Starting Page	719
Ending Page	723
Page Count	5
File Size	229415
File Format	PDF
ISSN	10518215
Volume Number	12
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MPEG 4 Standard Decoding Graphics Coprocessors Acceleration Streaming media Motion compensation Discrete cosine transforms Video coding Partitioning algorithms
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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