Proceedings ArticleDOI
Near-ultrasound communication for TV's 2nd screen services
Soonwon Ka,Tae Hyun Kim,Jae Yeol Ha,Sun Hong Lim,Su Cheol Shin,Jun Won Choi,Chulyoung Kwak,Sunghyun Choi +7 more
- pp 42-54
Reads0
Chats0
TLDR
Throughout experiments and log analysis of 2nd screen service deployed in a nation-wide TV broadcasting system, J-shape detection algorithms are proven to achieve highly resilient performance for both frame synchronization and carrier sensing compared to previous schemes.Abstract:
In this paper, we propose a near-ultrasound chirp signal-based communication for the TV's 2nd screen services. While near-ultrasound (with under 20 kHz frequency) communication has been developed for various applications recently, none of the previous work provides a perfect solution for 2nd screen services between TVs and smart devices. This is due mainly to the following real world challenges. The embedded signal in TV contents should be successfully received in a typical TV-watching environment by (i) delivering information at least at 15 bps with significantly low volume to avoid human perception, (ii) despite the presence of ambient noise, e.g., a tick, a snap, or a knock. To fulfill (i), we design chirp quaternary orthogonal keying (QOK) symbols. Especially, we aim to minimize inter-symbol interference (ISI) effects by symbol design in order to completely eliminate guard intervals. To resolve (ii), we propose the novel J-shape detection algorithms for both frame synchronization and carrier sensing. The proposed modem achieves almost zero frame error rate on a smartphone 2.7 m away from the TV even with minimal receive sound pressure level of 35 dBSPL, i.e., the noise level in a very quiet room. Moreover, throughout experiments and log analysis of 2nd screen service deployed in a nation-wide TV broadcasting system, J-shape detection algorithms are proven to achieve highly resilient performance for both frame synchronization and carrier sensing compared to previous schemes.read more
Citations
More filters
Journal ArticleDOI
Dolphin: Real-Time Hidden Acoustic Signal Capture with Smartphones
TL;DR: Dolphin enables real-time unobtrusive speaker-microphone data communication without affecting the primary audio-hearing experience of human users and develops a secure data broadcasting scheme on Dolphin, where only designated privileged users can recover the embedded information in the acoustic signals.
Journal ArticleDOI
Acoustic-based sensing and applications: A survey
TL;DR: This paper provides a comprehensive review on acoustic-based sensing in terms of hardware infrastructure, technical approaches, and its broad applications and describes different methodologies and techniques of using acoustic signals for sensing.
Proceedings ArticleDOI
VEH-COM: Demodulating vibration energy harvesting for short range communication
TL;DR: It is demonstrated that the proposed VEH-based sound decoding is resilient to background noise, thanks to its extremely narrow power harvesting bandwidth, which works as a natural noise filter.
Journal ArticleDOI
Self-Deployable Indoor Localization With Acoustic-Enabled IoT Devices Exploiting Participatory Sensing
TL;DR: An asynchronous acoustic-based localization system with participatory sensing that leverages the collaborative efforts of the participatory users who are relatively stationary in indoor environments as virtual anchors to eliminate the predeployment and post-maintenance costs incurred in traditional anchor-based solutions and proposes a robust method to address the near-far problem and device diversity.
Proceedings ArticleDOI
SoundAuth: Secure Zero-Effort Two-Factor Authentication Based on Audio Signals
TL;DR: Experiments with real login attempts show that SoundAuth not only is comparable to existent schemes concerning utility, but also outperforms them in terms of resilience to attacks.
References
More filters
Book
Digital communications : fundamentals and applications
TL;DR: In this paper, the authors present the often "difficult" concepts of digital communications in an easy-to understand manner-without diluting the mathematical precision, using a student-friendly approach.
Proceedings ArticleDOI
FingerIO: Using Active Sonar for Fine-Grained Finger Tracking
TL;DR: FingerIO does not require instrumenting the finger with sensors and works even in the presence of occlusions between the finger and the device, by transforming the device into an active sonar system that transmits inaudible sound signals and tracks the echoes of the finger at its microphones.
Proceedings ArticleDOI
Contactless Sleep Apnea Detection on Smartphones
TL;DR: A novel system that monitors the minute chest and abdomen movements caused by breathing on smartphones that works with the phone away from the subject and can simultaneously identify and track the fine-grained breathing movements from multiple subjects and develops algorithms that identify various sleep apnea events from the sonar reflections.
Proceedings ArticleDOI
Indoor pseudo-ranging of mobile devices using ultrasonic chirps
Patrick Lazik,Anthony Rowe +1 more
TL;DR: A communication primitive based on rate-adaptive wide-band linear frequency modulated chirp pulses that utilizes the audio bandwidth just above the human hearing frequency range where mobile devices are still sensitive, and is not only scalable with respect to the number of transmitters and tracked devices, but also improves user privacy.
Proceedings ArticleDOI
Dhwani: secure peer-to-peer acoustic NFC
TL;DR: Dhwani is developed, a novel, acoustics-based NFC system that uses the microphone and speakers on mobile phones, thus eliminating the need for any specialized NFC hardware.