NDLI: R2A: Realtime Resolution Adapter for Asymmetric Computer Screen Recording

Content Provider	IEEE Xplore Digital Library
Author	Shin-Hung Chang Kuei-Hsiung Chang Wei-Ting Chen
Copyright Year	2011
Abstract	Users need to record whole motions on their computer screens in many applications, such as distance learning, distance conference, thin client, share desktop and remote control etc. In order to conveniently use these applications, a problem, called asymmetric screen resolution (ASR), needs to be solved. The ASR problem means that the resolution of a remote computer is different from that of a client computer. Usually, one computer, called ¡§remote computer¡¨, records its screen and sends this recorded data to another computer, called ¡§client computer¡¨, for display through network transmission. Previously, resolutions of computers are only two categories, either 800x600 or 1024x768. Users can easily switch their computer¡¦s resolution between these two kinds of resolutions when adjusting resolution is necessary. However, resolutions of current computers are more than thirteen categories. Furthermore, many computers have their own specific resolutions and not all computer screens support these specific resolutions. If resolution of a remote computer is larger than that of a client computer, the ASR problem will leads to roll scroll bars to explore uncovered area of a computer screen while displaying a remote computer screen in a client computer with small resolution. Conversely, if resolution of a remote computer is smaller than that of a client computer, the ASR problem will lead to only use a small area in a large client computer screen. Traditionally, handling the ASR problem uses resizing whole screen images with system API, such as stretchblt ( ) of Microsoft windows system, in a client computer. However, this resizing whole image method requires too much network bandwidth and CPU utilization. This study addresses the R2A and R2A+ methods to handle real-time resolution adaptation for dealing with the ASR problem in screen recording applications. This paper tests the resolution adaptation quality and CPU utilization of the R2A and R2A+ methods in four different application scenarios, web browsing, slide show, text editing, and video playback. The experimental results show that integrating R2A and R2A+ methods utilizes less CPU utilization and guarantees the display quality at the same time in different applications. Compared with that of resizing whole image method, the integration method reduces CPU utilization by more than 30%.
Starting Page	195
Ending Page	202
File Size	520112
Page Count	8
File Format	PDF
ISBN	9781467302067
DOI	10.1109/APSCC.2011.77
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-12
Publisher Place	Korea (South)
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computers Real time systems Interpolation Computer aided instruction Screen recording Image resolution Asymmetric screen resolution Distance learning Streaming media Mirrors Remote control Thin client
Content Type	Text
Resource Type	Article

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