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Abstract.We introduce the concept of identity-differentiating widgets (iDwidgets), widgets parameterized by the identity of their user. Although multi-user applications have become more common, most support only traditional "single-user" widgets. By adding user-identity information we allow interactions with today's widgets to be dynamically customized on a per-user basis in a group usage setting. The concept has inspired the design of new widgets as well. In this paper we describe example iDwidgets and define a conceptual framework based on what is being customized in the widget. iDwidgets can support novel interaction techniques in collaborative settings.

Abstruct-This paper describes a set of interfaces for augmenting fast-forward and rewind on consumer digital video recorders. Our method overlays a series of images sampled from the video over top of the traditional full screen accelerated playback. This sequence creates a trail that provides contextual information and highlights upcoming scene changes in the video stream. With this augmentation, consumers are more accurate at traversing to a desired location in a recorded video. This advantage is achieved by taking advantage of compresseddomain processing and adds little computational and storage overhead. r. INTRODUCTIONDigital consumer video devices have all but replaced their analogue ancestors, and have brought with them the benefits of smaller device sizes, lower costs, and larger storage mediums. While these measurements have improved from this analogue to digital transition, many portions of the interface for accessing recorded video have remained the same. Some notable exceptions include what are the most exciting changes to video browsing interfaces; changes that have come from exploiting the qualities of digital media, and include such features as browsing by chapters on a DVD and the 30-second skip ahead button found on personal video recorders; however, the basic method for fast-forwarding, browsing in full screen one frame at a time, has remained the same.With an analog tape, a device can only display an image from one position in the video at a time. This constraint is lifted for random-access digital video devices that can display multiple portions of a recorded video stream at the same time.We have found that this type of simultaneous-points-ofplayback interface especially helpful for the tasks of fastforwarding and rewinding through recorded video. In addition to the familiar accelerated playback of the video that is provided by VCRs, PVRs, and DVD players, our interface simultaneously shows a number of upcoming and previous frames from the video stream in the periphery of the screen ( Figure I). By presenting multiple frames from the video stream simultaneously, we give the consumer a view into the future of the video they are traversing. Camera movement and scene boundaries are clearly visible and aid in the navigation. With this extra information, consumers are better able to identify upcoming points of interest in a recorded video, and are able to more quickly and more accurately traverse to a desired location in the stream.0-7803-8838-0/05/$20.00 02005 IEEE. 43the background o f the screen. In the foreground, a timeline displays upcoming and previous images from the video stream. In this example, the middle frame is in sync with the background fast-forward frame. TECHNICAL DESCRIPTIONCapturing and rendering full-screen high-definition images is computationally expensive and requires large amounts of storage. Rather than trying to decode multiple portions of the recorded video stream simultaneously or trying to store a collection of full-resolution images while capturing video, our approach ...

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We describe an implementation of our previously developed highlight scene detection and video summarization system on a PVR-enabled high definition television system. The implementation poses significant challenges such as consuming minimal computational resources so as to avoid disrupting any of the existing functionalities. The target platform poses challenges such as the absence of a DSP which differ significantly from our previous PVR platform. Our implementation successfully addresses the aforementioned challenges by adapting techniques such as limited buffering and error concealment for dropped frames to the target platform. IEEE International Conference on Consumer Electronics (ICCEThis work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Abstract-We describe an implementation of our previously developed highlight scene detection and video summarization system, on a PVR-enabled high-definition television system. The implementation poses significant challenges such as consuming minimal computational resources so as to avoid disrupting any of the existing functionalities. The target platform poses challenges such as the absence of a DSP which differ significantly from our previous PVR platform. Our implementation successfully addresses the aforementioned challenges by adapting techniques such as limited buffering and error concealment for dropped frames to the target platform.