Surendar Chandra, Carla Schlatter Ellis, and Amin Vahdat, "Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding, " in The Second ACM International Workshop on Wireless Mobile Multimedia, Seattle, August 1999, ACM SIGMOBILE.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....phones. 3.3. 1 Quality aware transcoding Chandra et al. have proposed transcoding techniques to provide differentiated service to Web devices and to dynamically allocate available bandwidth among different device classes, while delivering good quality of information content for all clients [CEV99, CE99, CEV00] The idea presented is to deliver the information on a Web server according to network connectivity and client device characteristics. The technique proposed concentrates on adapting JPEG images based on bandwidth information. If the connection is weak (i.e. slow) for example, the ....

Surendar Chandra, Carla SChlatter Ellis, and Amin Vahdat. Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding. In 2nd ACM International Workshop on Wireless Mobile Multimedia (WoWMoM 99), Seattle, WA, USA, August 1999.

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Surendar Chandra, Carla Schlatter Ellis, and Amin Vahdat, "Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding, " in The Second ACM International Workshop on Wireless Mobile Multimedia, Seattle, August 1999, ACM SIGMOBILE.

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S. Chandra, C. S. Ellis, and A. Vahdat, "Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding," in The Second ACM International Workshop on Wireless Mobile Multimedia, pp. 99--108, (Seattle), Aug. 1999.

.... degree of information content (Quality Factor) for all clients [26, 25] We also demonstrate that it is possible to use informed transcoding techniques in a network proxy to balance the demand for quality of multimedia content while reducing consumed network bandwidth and server CPU overhead 8 [24]. 3. We also demonstrate techniques that allow application developers to exploit the storage, quality and battery tradeoffs to store images in the best possible fashion in a multimedia image capture device (e.g. digital camera) 27] 1.4 Organization This dissertation is organized as follows: ....

....quality aware, informed transcoding for mobile end users accessing the web via wireless networks. We demonstrate that it is possible to use informed transcoding techniques to balance the demand for quality of multimedia content while reducing consumed network bandwidth and server CPU overhead [24]. In Chapter 7, we focus on resource management in devices that are affected by the unique challenges and opportunities offered by mobile multimedia applications. We use the example of a digital 10 camera to illustrate the issues in a mobile multimedia system. We develop techniques to allow ....

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Surendar Chandra, Carla Schlatter Ellis, and Amin Vahdat. Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding. In Proceedings of the Second ACM International Workshop on Wireless and Mobile Multimedia (WoWMoM'99), pages 99--108, Seattle, August 1999. ACM SIGMOBILE.

.... a high degree of information content (Quality Factor) for all clients [6] We also show how a web server can dynamically serve different versions of multimedia objects to clients accessing the web, based on network performance, to provide tolerable latency and a satisfying web experience [7]. The rest of the paper is organized as follows: Section II reviews our previous work as the necessary background and places our work in context to other related work. Section III outlines the experiment objectives and design constraints, as well as the system architecture, the workload used, and ....

Surendar Chandra, Carla Schlatter Ellis, and Amin Vahdat, "Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding, " in The Second ACM International Workshop on Wireless Mobile Multimedia, Seattle, August 1999, ACM SIGMOBILE.

....to lose more in storage space for a particular loss in information quality. We show that we can predict efficient images at a significantly better rate than the base case. We validate these results with a number of JPEG images. The results from this paper were utilized in a companion paper [4] that describes the utility of quality aware transcoding for serving multimedia objects to mobile clients. The remainder of this paper is organized as follows: Section 2 describes the JPEG compression metric and how it can be computed for a given JFIF image. Section 3 describes the workload used ....

S. Chandra, C. S. Ellis, and A. Vahdat. Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding. In The Second ACM International Workshop on Wireless Mobile Multimedia, Seattle, Aug 1999.

....the result delivered may become degraded in quality so much as to be unusable. In our preliminary work [2] we have developed an informed quality aware transcoding technology that addresses this deficit, preserving quality by allowing transcoding to be selectively applied. We have demonstrated [3] that this technique can be applied at a proxy to reduce the wireless bandwidth required to deliver good quality images. Mobile devices can also achieve improved average image quality and reduced power consumption by performing transcoding operations locally. In [4] we show that our techniques ....

S. Chandra, C. S. Ellis, and A. Vahdat. Multimedia Web Services for Mob ile Clients Using Quality Aware Transcoding. In Proceedings of the Second ACM/IEEE International Conference on Wireless and Mobile Multimedia (WoWMoM'99), Seattle, WA, August 1999. ACM SIGMOBILE.

....estimates the computational overhead with a high degree of accuracy. We also develop a predictor to determine if an image will lose more in storage space for a corresponding loss in information quality. We refer to the technology we have developed as quality aware transcoding. Preliminary results [6] show how to utilize this technology to allow network proxy servers to customize objects for the network bandwidth available on the wireless last hop to a mobile client. Experiments performed in that work identify policies that selectively transcode JPEG images to deliver good quality with ....

S. Chandra, C. S. Ellis, and A. Vahdat. Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding. In Proceedings of the Second ACM/IEEE International Conference on Wireless and Mobile Multimedia (WoWMoM'99), Seattle, WA, August 1999. ACM SIGMOBILE.

....possible cost. On the other hand, consumers using high speed networks and high quality displays may desire to view the multimedia images at the highest quality. Further, consumers using slow networks want to view the images as quickly as possible. Transcoding has been used in a number of systems [3, 4, 11, 12, 26, 23, 22, 21, 19, 27, 8, 17, 1, 28] to serve the same multimedia object at different quality levels to different users. Transcoding is a transformation that converts a multimedia object from one form to another, frequently trading object fidelity for size. Some of the transcoding choices for images include color reduction, spatial ....

....of a JPEG image as well as the computational costs and space benefits for a transcoding that changes the JPEG compression metric of an image. We utilized this informed transcoding technology in a transcoding web proxy serving mobile clients that access the web using slow and expensive networks [3]. We demonstrated that it is possible to use informed transcoding techniques to balance the demand for quality of multimedia content while reducing consumed network bandwidth and server CPU overhead. We also utilized informed transcoding in a web service that offers differentiated Quality of ....

Surendar Chandra, Carla Schlatter Ellis, and Amin Vahdat. Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding. In The Second ACM International Workshop on Wireless Mobile Multimedia, pages 99--108, Seattle, August 1999. ACM SIGMOBILE.

No context found.

S. Chandra, C. Ellis, A. Vahdat, "Multimedia Web Services for Mobile Clients Using Quality Aware Transcoding," ACM International Workshop On Wireless Mobile Multimedia (WOWMOM), 1999, pp. 99-108.

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