Acoustic Data Transmission to Ad-hoc Mobile Phone Arrays

Phones jointly decode the received data, acting as an array, which greatly improves the quality of the communication channel.

Phones jointly decode the received data, acting as an array, which greatly improves the quality of the communication channel.

In show environments like cinemas, theaters, music concerts, entertainment theme parks, or at sport stadiums, offering a reliable communication channel from the show event (movie, concert) towards mobile phones located in the audience enables interesting new applications. For example, events in a movie can trigger additional and assisting information to appear on a phone’s display. This is particularly attractive when there is no need for a wireless infrastructure. Avoiding the need for a dedicated wireless infrastructure, the movie (or show) can directly interact with phones in the audience, independently of the local resources. Wirelessly communicating data from a movie to mobile phones in a cinema can be realized by using the cinema audio system and multiple loudspeakers. The system introduced in this project addresses the problem of how to offer a larger throughput per mobile phone over the acoustic channel, with higher reliability. We let multiple phones observe independently the incoming audio signals from loudspeakers. The phones group together and connect with each other via radio communication, so that they can jointly process the received data messages. Phones at different locations often observe different audio channel error characteristics, which can be exploited during error handling (spatial diversity), once they are connected with each other.

Publication

Acoustic Data Transmission to Collaborating Smartphones – An Experimental Study
Roman Frigg (Disney Research Zürich, ETH Zürich), Giorgio Corbellini (Disney Research Zürich),
Stefan Mangold (Disney Research Zürich), Thomas R. Gross (ETH Zürich)
(2014) IEEE/IFIP Annual Conference on Wireless On-demand Network Systems and Services (WONS) 2014
Paper [PDF, 5.1MB]

Talk and Demo

CinemaCom: Multi-Channel Acoustic Data Transmission to Ad-Hoc Mobile Phone Arrays
Roman Frigg (Disney Research Zürich, ETH Zürich), Thomas R. Gross (ETH Zürich), Stefan Mangold (Disney Research Zürich),
(2013) ACM Special Interest Group on Computer Graphics and Interactive Techniques (SIGGRAPH) Mobile 2013
Paper [PDF, 5.1MB], [Press Release]

Contact

Stefan Mangold (stefan@disneyresearch.com)

Publications

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