Force and touch feedback for virtual reality
Force and touch feedback for virtual reality
IEEE Transactions on Signal Processing
Rate-distortion optimized streaming of packetized media
IEEE Transactions on Multimedia
EuroHaptics'12 Proceedings of the 2012 international conference on Haptics: perception, devices, mobility, and communication - Volume Part I
EuroHaptics'12 Proceedings of the 2012 international conference on Haptics: perception, devices, mobility, and communication - Volume Part I
Perception-aware packet-loss resilient compression for networked haptic systems
Computer Communications
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The performance of haptic interaction across communication networks critically depends on the successful reconstruction of the bidirectionally transmitted haptic signals, and hence on the quality of the communication channel. We propose a novel error-resilient data reduction scheme for haptic communication which exploits known limits of human haptic perception. Particularly, we show that missing haptic information due to packet loss may strongly impair the user's experience during haptic interaction. We present and compare methods that eliminate the disturbing artifacts resulting out of packet loss. Our approach keeps the estimated impact of packet losses below human perception thresholds. A tree of possible cases (packets received or not received) and their respective occurrence probabilities is maintained at the sender side, and the system predicts unacceptable error cases to decide whether extra packets should be sent. We introduce different criteria that can be employed to trigger additional packets. In our experiments, we evaluate both the objective data reduction performance and the subjective system transparency by performing extensive tests using packet loss probability and round trip time as parameters. The proposed scheme shows excellent performances in terms of data reduction while sustaining good subjective ratings for a wide range of packet loss values and round trip times.