The AltMM 2017 workshop aims at exploring how the synergy between multimedia technologies and effects can foster the creation of alternate realities and make their access an enriching, valuable and real experience. We seek contributions that present multimedia technologies, methods and measurement approaches from the perspective of "enabling other realities".

In particular, one or more of the following dimensions must be addressed in the contributions by prospective authors, when characterizing the type of multimedia alternate realities that they are aiming for:

• Alternate ‐ refers to what is alternate about it: different space, time, situation, and so on;
• Virtual/Augmented ‐ how far or close to the actual reality content can be experienced, ranging from totally virtual to augmented reality;
• Real/Fictional ‐ how real or fictional the content is;
• Interactive ‐ the level of interactivity as a means of engagement and immersion;
• Immersive ‐ level in perceptual, cognitive and emotional terms, the sense of presence and belonging, the quality of the content and the experience, imagination and engagement;
• Multisensorial ‐ the media involved and how much mulsemedia it is, also going beyond audiovisual content to include the five senses;
• Personal ‐ adaptation to individual preferences and contexts;
• Social ‐ individualized vs shared experiences and communication.

We invite contributions with the goals and the perspective of enabling alternate realities experiences as characterized above, through multimedia technologies, and design and evaluation methods for its creation and consumption. This involves the use of different types of media content (audio‐visual, haptics, smell, and taste), increased immersion (e.g., 3D, holographic, UHD, ultra-wideview, and stereoscopic audio), new interaction devices, environments, modalities, and formats. 
Topics include but are not limited to:

Creation and Consumption of Alternate Realities

• capturing and sensing;
• content production and authoring, interactive storytelling, digital narratives, cinema and TV;
• crowdsourcing and co‐creation;
• delivery, rendering, and consumption paradigms , co‐experience and communication;
• personalization, post‐processing, enhancement and real‐time adaptation.

Design and Evaluation of Alternate Realities Experience

• engagement, immersion, flow assessment and prediction;
• experience evaluation through the analysis of quantitative (physiological data, self reports) and qualitative data;
• quality of alternate reality experience measurements and metrics;
• field trial reports and user studies.

Alternate Realities Applications

• from more traditional to multi‐device and multisensory shared content consumption in asynchronous or live scenarios, in personal media, culture, tourism, art, education, training, wellbeing, and so on.

The workshop program will contain a combination of oral and invited keynote presentations, and poster, demo and discussion sessions, altogether enabling interactive scientific discourse. AltMM 2017 welcomes submissions of full papers (max. 6 pages) for oral presentation, as well as short papers that report work‐in‐progress (max 4 pages) for poster presentation, reporting new, unpublished, original research. Accompanying demonstrations or videos are very welcome and highly appreciated.

All submissions must be written in English and formatted according to the ACM Proceedings style (templates in the submission page), and they must contain no information identifying the author(s) or their organization(s). Reviews will be double‐blind. Papers will be judged on their relevance, originality, technical content and correctness, and the clarity of presentation of the research.

Accepted papers will appear in the ACM Multimedia 2017 Workshop Proceedings and will be part of the ACM Digital Library. A Special Issue of a Top Ranked Multimedia Journal is being planned.