TY - GEN
T1 - Reconstruction of multiple-user voice commands using a hybrid system based on thin-film electronics and CMOS
AU - Huang, L.
AU - Sanz-Robinson, J.
AU - Moy, T.
AU - Hu, Y.
AU - Rieutort-Louis, W.
AU - Wagner, S.
AU - Sturm, J. C.
AU - Verma, N.
N1 - Publisher Copyright:
© 2015 JSAP.
PY - 2015/8/25
Y1 - 2015/8/25
N2 - This paper presents a system consisting of an array of thin-film microphone channels on glass, which can be formed on large substrates. Each microphone channel consists of a polyvinylidene difluoride (PVDF) piezoelectric transducer as well as amplifier and scan circuits based on amorphous-silicon (a-Si) thin-film transistors (TFTs). The scan circuits multiplex signals from multiple channels to a CMOS IC for readout. By spatially distributing the channels on a large substrate, audio signals from multiple simultaneous speakers in a space can be both acquired in closer proximity and separated, enabling a multi-user human-computer interface based on voice commands. To overcome low TFT performance in the scan circuits (which limits channel sampling to below the Nyquist rate), a signal reconstruction algorithm is proposed. An 8-channel system demonstrates acquisition and reconstruction of 2 simultaneous audio signals at 2m distance from the array.
AB - This paper presents a system consisting of an array of thin-film microphone channels on glass, which can be formed on large substrates. Each microphone channel consists of a polyvinylidene difluoride (PVDF) piezoelectric transducer as well as amplifier and scan circuits based on amorphous-silicon (a-Si) thin-film transistors (TFTs). The scan circuits multiplex signals from multiple channels to a CMOS IC for readout. By spatially distributing the channels on a large substrate, audio signals from multiple simultaneous speakers in a space can be both acquired in closer proximity and separated, enabling a multi-user human-computer interface based on voice commands. To overcome low TFT performance in the scan circuits (which limits channel sampling to below the Nyquist rate), a signal reconstruction algorithm is proposed. An 8-channel system demonstrates acquisition and reconstruction of 2 simultaneous audio signals at 2m distance from the array.
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U2 - 10.1109/VLSIT.2015.7223650
DO - 10.1109/VLSIT.2015.7223650
M3 - Conference contribution
AN - SCOPUS:84951051026
T3 - Digest of Technical Papers - Symposium on VLSI Technology
SP - C196-C197
BT - 2015 Symposium on VLSI Technology, VLSI Technology 2015 - Digest of Technical Papers
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - Symposium on VLSI Technology, VLSI Technology 2015
Y2 - 16 June 2015 through 18 June 2015
ER -