NDLI: Two-Step Coding for High Definition Video Compression

Content Provider	IEEE Xplore Digital Library
Author	Wenfei Jiang Wenyu Liu Latecki, L.J. Hui Liang Changqing Wang Bing Feng
Copyright Year	2010
Abstract	High definition (HD) video has come into people’s life from movie theaters to HDTV. However, the compression of HD videos is a challenging problem due to flicker noise, caused by film grain. The flicker noise significantly limits the applicability of motion estimation (ME), which is a key factor of the efficient video compression in block-based coding standards. Due to the flicker noise, it is difficult to obtain a perfect match between a current block and a reference block. In block-based video coding standards including H.264 a given block is either encoded by inter-frame or intra-frame prediction. We propose a new coding scheme called Two-Step Coding (TSC) that utilizes both for each block. TSC first reduces the resolution of each frame by replacing each block with its DC coefficient of the DCT to the original color values. The flicker noise is greatly reduced in the obtained lower resolution frame, which we call DC frame. The key benefit is that ME becomes very efficient on DC frames, and consequently, the DC frame can be efficiently inter-frame coded. The difference between the original frame and DC frame is actually described by the AC coefficients of the DCT of the original frame. We utilize the existing H.264 tools to combine the intra-frame and inter-frame coded parts of blocks both on the encoder and decoder sides. The key benefit of the proposed TSC in comparison to the most popular standards, in particular, in comparison to H.264 lies in better utilization of inter-frame coding.. Due to flicker noise, H.264 mostly employs intra block coding on HD videos. However, it is well-known that inter-frame coding significantly outperforms intra coding in video compression rate if the temporal correllation is correctly utilized. By reducing each frame to DC frame, TSC makes it possible to apply inter-frame coding. We provide experimental data and analysis to illustrate this fact.
Starting Page	535
Ending Page	535
File Size	158109
Page Count	1
File Format	PDF
ISBN	9781424464258
ISSN	10680314
e-ISBN	9781424464265
DOI	10.1109/DCC.2010.54
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-03-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	High definition video 1f noise Video compression Discrete cosine transforms DC generators Decoding Motion pictures HDTV Motion estimation Codecs SVC High Definition Video H.264 Film grain flicker noise
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications

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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