NDLI: Video compression using fax techniques

Content Provider	IEEE Xplore Digital Library
Author	Yi-Jen Chiu Berger, T.
Copyright Year	1996
Description	Author affiliation: Sch. of Electr. Eng., Cornell Univ., Ithaca, NY, USA (Yi-Jen Chiu; Berger, T.)
Abstract	We have implemented approaches to compressing and decompressing a sequence of head-and-shoulders images that trade off the data rate, picture quality, computational complexity and latency. All these approaches are transform-free and pixel-based; some of them also involve no motion compensation and hence are free of block-based artifacts. We compare the magnitude of the intensity of each pixel site in the difference frame to a threshold. If the intensity at a pixel site is above the threshold, that pixel is a survivor; otherwise, that pixel is a casualty. We zero the intensity at each casualty pixel and leave the intensity intact at each surviving pixel. A bi-level frame is formed to represent the location map of the survivors and casualties. We gather the intensities at the surviving pixels into an intensity vector. The zeroed difference frame is therefore decomposed into a bi-level frame and an intensity vector. We modified the Group 3, Group 4 or JBIG facsimile standards to compress the bi-level frame and can achieve further compression by applying scalar quantization to each element of the intensity vector. Forming the difference frames by direct subtraction of the previous decompressed frame from the current input frame permits software-only realization of the compressor and decompressor on today's home and office computers for large (CIF or Q-NTSC) full-color formats at 30 frames per second for head-and-shoulders video at under 1.0 Mbps with PSNR>38 dB, assuming provision has been made for A/D converted camera output to be pipelined into the computer CPU in real time.
File Size	60571
File Format	PDF
ISBN	0818673583
ISSN	10680314
DOI	10.1109/DCC.1996.488357
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-03-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Video compression Home computing Image coding Computational complexity Delay Motion compensation Facsimile Quantization Cameras Central Processing Unit
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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