IEEE Trans Haptics. 2023 Oct-Dec;16(4):646-651. doi: 10.1109/TOH.2023.3276420. Epub 2023 Dec 21.
To achieve convincing remote vibrotactile experiences, it is necessary to transmit a large number of signal channels corresponding to dense interaction points on the human skin. This leads to a dramatic increase in the amount of data to be transmitted. In order to cope with these data efficiently, vibrotactile codecs have to be used to reduce the data rate demands. Although first vibrotactile codecs have been introduced in the past, they are mostly single-channel codecs and cannot achieve the required data reduction. Therefore, in this paper, a multi-channel vibrotactile codec is presented that extends a wavelet-based codec for single channel signals. By leveraging interchannel redundancies using channel clustering and differential coding, the presented codec is able to achieve a reduction of 69.1% in data rate compared to the state-of-the-art single-channel codec while maintaining a perceptual ST-SIM quality score of 95%.
为了实现令人信服的远程振动触觉体验，有必要传输大量与人体皮肤密集交互点相对应的信号通道。这导致需要传输的数据量急剧增加。为了有效地处理这些数据，必须使用振动触觉编解码器来降低数据速率要求。虽然过去已经引入了第一代振动触觉编解码器，但它们大多是单通道编解码器，无法实现所需的数据减少。因此，本文提出了一种多通道振动触觉编解码器，该编解码器扩展了用于单通道信号的基于小波的编解码器。通过利用通道聚类和差分编码来利用通道间冗余，所提出的编解码器能够实现与最先进的单通道编解码器相比，数据速率降低 69.1%，同时保持感知 ST-SIM 质量评分为 95%。
