Automatic image data quality adjustment to reduce response time of a Web server  

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	Publication number: EP0992922 (A2) Publication date: 2000-04-12 Inventor(s): BHAGWAT PRAVIN [GB]; HAN RICHARD YEH-WHEIN [GB]; LA MAIRE RICHARD O [GB]; MUMMERT TODD WILLIAM [GB]; RUBAS JAMES [GB] Applicant(s): IBM [US] Classification:   - international: G06F15/16; G06F17/30; H04L29/06; H04L29/08; H04N7/24; H04N7/26; G06F15/16; G06F17/30; H04L29/06; H04L29/08; H04N7/24; H04N7/26; (IPC1-7): G06F17/30 - European: G06F17/30W9V; H04L29/06; H04L29/08N27R; H04N7/24C6; H04N7/26T Application number: EP19990307580 19990924  Priority number(s): US19990236622 19990129; US19980102944P 19981002     View INPADOC patent family   View list of citing documents   View document in the European Register     Also published as:   EP0992922  (A3)     EP0992922  (B1)     US6563517  (B1)     KR20000034960  (A)     DE69919474  (T2)       more >> Cited documents:   WO9843177 (A1)     EP0811939 (A2)     XP000790121 (A)   Report a data error here    Abstract of EP 0992922  (A2) The present invention provides methods, devices and systems for dynamically adjusting transcoding parameters so as to increase the benefits of transcoding. Methods of adaptation are designed to cope with the variability of network characteristics and of the size of transcoded images. The invention also provides a method and apparatus to enable the transcoding proxy to adjust a quality-size tradeoff on a per-image and/or a per-client basis. The adaptive transcoder chooses different parameters for each object, and provides performance improvements. The invention further provides a general framework for making policy decisions taking into account available bandwidth, content and type of image, and user preferences. The invention also includes methods for generating feedback about the choice of optimal transcoding parameters to the user.   Data supplied from the esp@cenet database — Worldwide