This paper proposes a content-adaptive blending method, smart compositing, for displaying two overlapped video frames on the same screen while preserving the readability of both. A pixel-wise adaptive blending factor map is generated according to the edge and saturation information of the content of only the overlay frame. Using this blending factor map, regions of the overlay frame with edges or saturated color are assigned to be more opaque and the remaining regions are assigned to be more transparent. A halo is also created around the edges of the overlay content which enhances the edges and disambiguates them from the underlying frame. The proposed method is suitable for overlaying many different types of content (e.g. drawings, slides, texts, and pictures) and does not require any information (e.g., an opacity mask) from the application which generates the content. This method has low computational complexity and has been implemented in real-time.

In this workshop, we explore novel applications, services, tools, and systems that take advantage of the audio channel on mobile devices to feed users with a flow of information. We call for innovative ideas to introduce ambient context-aware, location-aware, and/or social audio as a more effective means of communicating information and providing experiences to mobile users.

Mobile video is now an everyday possibility with a wide array of commercially available devices, services and content. These technologies promise to transform the way that people can consume video media in their lives beyond the familiar behaviours associated with fixed TV and video technologies. Building upon earlier studies of mobile video, this paper reports on a study using diary techniques and ethnographic interviews to better understand how people are using commercially available mobile video technologies in their everyday lives. Drawing on reported episodes of mobile video behaviour, the study identifies the social motivations and values underpinning these behaviours that help characterise mobile video consumption beyond the simplistic notion of viewing TV to kill time wherever you may be. Implications for adoption and design of mobile video technologies and services are discussed.

Named for the combination of the words DJ and Jamming, the DJammer allows its users to manipulate their music using standard DJ techniques as well as interact with others in virtual jam sessions through the exchange and sharing of multiple music streams. In this paper, we describe the evolution of the DJammer including the interactive process and evaluation which led to the latest prototype. This latest prototype allows its users to "touch" their digital music through single-handed manipulation and control. By allowing both creativity and communication with digital music, the DJammer is a new musical instrument which takes the next step in the evolution of portable music players.

Mutually-immersive mobile telepresence uses a teleoperated robotic surrogate to visit remote locations as a substitute for physical travel. Our goal is to recreate to the greatest extent practical, both for the user and the people at the remote location, the sensory experience relevant for business interactions of the user actually being in the remote location. The system includes multi-channel bidirectional video and audio on a mobile platform as well as haptic feedback. The user-controlled surrogate can autonomously backtrack along the path it has previously been driven if it loses wireless connectivity.

BiReality (a.k.a. Mutually-Immersive Telepresence) uses a teleoperated robotic surrogate to provide an immersive telepresence system for face-to-face interactions. Our goal is to recreate to the greatest extent practical, both for the user and the people at the remote location, the sensory experience relevant for face-to-face interactions of the user actually being in the remote location. Our system provides a 360-degree surround immersive audio and visual experience for both the user and remote participants, and streams eight 704x480 MPEG-2 coded videos totaling 20Mb/s. The system preserves gaze and eye contact, presents local and remote participants to each other at life size, and preserves the head height of the user at the remote location. Initial user experiences are presented.