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1. 发明公开

EP3968235A1 ARTIFICIAL NEURAL NETWORK PROCESSING METHODS AND SYSTEM 审中-公开
公开(公告)号：EP3968235A1
公开(公告)日：2022-03-16
申请号：EP21184536.7
申请日：2021-07-08
申请人： STMicroelectronics S.r.l.
发明人： CARRERA, Diego , COLELLA, Matteo , DESOLI, Giuseppe , BORACCHI, Giacomo , ROSSI, Beatrice , FRAGNETO, Pasqualina , FRITTOLI, Luca
IPC分类号： G06N3/04
摘要： A computer-implemented method (40), comprising: providing an ANN processing stage having a plurality of processing layers with respective parameters including at least one set of weight parameters (w i ), at least one input, resp. output, activation parameter and at least one activation function parameter; setting to an integer value a dimensional parameter (d) of a lattice having a plurality of lattice points and identified by a set of basis vectors; selecting (400) a set of weight parameters (w i ) of a respective processing layer; applying vectorization processing (402) to the selected set of weight parameters (wi) producing a set of weight vectors arranged as items of a matrix of weight vectors (U) ; performing normalization processing (404) of the matrix of weight vectors (U), producing a matrix of normalized weight vectors (U'); applying lattice vector quantization, LVQ, processing (406) to the matrix of normalized weight vectors (U'), producing a codebook (CB) of codewords; applying indexing processing (408) comprising encoding codewords of the codebook (CB) as a function of the lattice, producing respective tuples of indices ( i s , i a , i a LUT ). Performing the normalization processing (404) comprises computing an optimization problem having a first term configured to provide normalized weight values approximating at least output, as a function of at least one input, activation parameter, and a regularization term Ω L ( u ), configured to amplify weight values having a short distance from the lattice points of the lattice L.

2. 发明公开

EP4212909A1 A METHOD OF OPERATING ELECTRO-ACOUSTIC TRANSDUCERS, CORRESPONDING CIRCUIT AND DEVICE 审中-公开
公开(公告)号：EP4212909A1
公开(公告)日：2023-07-19
申请号：EP22213083.3
申请日：2022-12-13
申请人： STMicroelectronics S.r.l.
发明人： CARMINATI, Francesca , PASSONI, Marco , ROSSI, Beatrice , CARRERA, Diego , FRAGNETO, Pasqualina
IPC分类号： G01S7/521 , G01S7/524 , G01S7/527 , G01S7/53 , G01S15/10
摘要： A method of operating a PMUT electro-acoustical transducer (UT), the method comprising:
- applying (10) over an excitation interval to the transducer (UT) an excitation signal (TX pulses) which is configured to emit corresponding ultrasound pulses towards a surrounding space,
- acquiring at a receiver (20) reflected ultrasound pulses as reflected in said surrounding space,
- generating (50) a reference echo signal (RE)
- performing (40) a cross-correlation of said acquired received ultrasound pulses with said reference echo signal (RE).
performing a measurement (MS) based on the cross-correlation results, in particular a measurement of the time of flight of the ultrasound pulses,
wherein said reference echo is obtained by
finding (52T) an oscillation frequency (f 0T ) of the transmitter on the basis of a transmitter ring down signal,
finding (52R) an oscillation frequency (f 0R ) of the receiver on the basis of a receiver ringdown signal,
performing (53) a frequency tuning respectively on the transmitter and the receiver on the basis of said respective oscillation frequencies (f 0R , f 0T ),
then sweeping (54) an input frequency (f IN,TX ) of the transmitter to find a frequency (/) of the maximum displacement (x) in the ringdown signal,
performing (55) a frequency tuning of the receiver at said frequency ( f̂ ) of the maximum displacement (x) in the ringdown signal of the transmitter.

3. 发明公开

EP3251594A1 METHOD FOR THE DETECTING ELECTROCARDIOGRAM ANOMALIES AND CORRESPONDING SYSTEM 审中-实审
标题翻译：检测心电图异常的方法和相应的系统
公开(公告)号：EP3251594A1
公开(公告)日：2017-12-06
申请号：EP17150350.1
申请日：2017-01-05
申请人： STMicroelectronics S.r.l.
发明人： ROSSI, Beatrice , FRAGNETO, Pasqualina , ZAMBON, Daniele , CARRERA, Diego , BORACCHI, Giacomo
IPC分类号： A61B5/0472 , A61B5/0468 , A61B5/0452 , A61B5/00 , A61B5/11 , A61B5/04 , A61B5/0456
CPC分类号： A61B5/7267 , A61B5/0022 , A61B5/02438 , A61B5/0245 , A61B5/04012 , A61B5/04017 , A61B5/0402 , A61B5/04525 , A61B5/0456 , A61B5/0468 , A61B5/0472 , A61B5/1118 , A61B5/7207 , A61B5/7221 , A61B5/7232 , A61B5/7253 , A61B5/7278 , A61B2505/07 , A61B2562/0219
摘要： A heartrate monitor detects (1604) heartbeats in a test signal. A local heartrate and an energy of acceleration are associated (1606, 1608, 1610) with the detected heartbeats. Detected heartbeats are included or excluded (1612) from a test set of heartbeats based on the local heartrate and energy of acceleration associated with the respective heartbeats. Anomalous heartbeats in the test set of heartbeats are detected (1622) using a sparse approximation model (1620). The heartrate monitor may detect heartbeats in a training heartbeat signal. A reference heart rate and an energy of acceleration are associated with detected beats of the training heartbeat signal and selectively included in a set of training data based on the heart rate and energy of acceleration associated with the detected beat in the training heartbeat signal. A dictionary of the sparse representation model may be generated using the set of training data.
摘要翻译：心率监视器检测（1604）测试信号中的心跳。一个本地心脏和一个加速能量与检测到的心跳相关联（1606,1608,1610）。基于局部心率和与相应心跳相关联的加速能量，从心跳测试组中包括或排除检测到的心跳（1612）。使用稀疏近似模型（1620）检测心脏检测集合中的异常心跳（1622）。心率监测器可以检测训练心跳信号中的心跳。基准心率和加速能量与训练心跳信号的检测到的节拍相关联，并基于与训练心跳信号中与检测到的节拍相关联的加速度的心率和能量选择性地包括在一组训练数据中。可以使用该组训练数据来生成稀疏表示模型的字典。

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