Image transcoding for wireless WWW access: the user perspective

Thomas Kunz; Mohamed El Shentenawy; Abdulbaset Gaddah; R. H. M. Hafez

doi:10.1117/12.449986

10 December 2001 Image transcoding for wireless WWW access: the user perspective

Thomas Kunz, Mohamed El Shentenawy, Abdulbaset Gaddah, R. H. M. Hafez

Proceedings Volume 4673, Multimedia Computing and Networking 2002; (2001) https://doi.org/10.1117/12.449986
Event: Electronic Imaging, 2002, San Jose, California, United States

Abstract

Mobile devices/clients vary in their hardware and software resources such as screen size, color depth, effective bandwidth, processing power, and the ability to handle different data formats. This makes it difficult for servers to support a wide range of client variations. In our research, we introduce an image transcoding proxy server placed between the generic WWW servers and the heterogeneous mobile hosts. The selection of transcoding operations is based on the mobile device characteristics and can adapt to dynamically changing bandwidth on the proxy-client link. The policy decisions are used to select the most appropriate operations in order to achieve the smallest file size and acceptable image quality. More aggressive transcoding operations result in greater loss of image quality. Based on a user survey, we determined minimal acceptable thresholds for each transcoding operation. As our results show, these thresholds are dependent on the display quality of the user device.

Citation Download Citation

Thomas Kunz, Mohamed El Shentenawy, Abdulbaset Gaddah, and R. H. M. Hafez "Image transcoding for wireless WWW access: the user perspective", Proc. SPIE 4673, Multimedia Computing and Networking 2002, (10 December 2001); https://doi.org/10.1117/12.449986

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available