公开(公告)号：US10127918B1

公开(公告)日：2018-11-13

申请号：US15585458

申请日：2017-05-03

Applicant: Amazon Technologies, Inc.

Inventor： Krishna Kamath Koteshwara ,  Trausti Thor Kristjansson

IPC: G10L21/02 ,  G10L19/005 ,  G10L15/22 ,  G10L25/30 ,  G10L15/06 ,  G11B27/038 ,  G10L21/0364 ,  G10L21/0332

Abstract: A system configured to reconstruct audio signals. The system may identify missing audio samples due to packet loss or detect distortion caused by audio clipping and may reconstruct the audio data. The system may employ a forward-looking neural network that recursively predicts audio samples based on previous audio samples and/or a backward-looking neural network that recursively predicts audio samples based on subsequent audio samples. The system may generate audio data using only the forward-looking neural network for low latency applications or may generate audio data using both neural networks for mid to high latency applications. To reduce distortion in output audio data, the system may generate the audio data by cross-fading between outputs of the neural networks and/or may cross-fade between the generated audio data and the input audio data.

公开(公告)号：US09424456B1

公开(公告)日：2016-08-23

申请号：US14748480

申请日：2015-06-24

Applicant: Amazon Technologies, Inc.

Inventor： Krishna Kamath Koteshwara ,  Pushkaraksha Gejji

IPC: G06K9/00

CPC classification number: G06K9/0002 ,  G06K9/00093 ,  G06K9/001

Abstract: An ultrasonic finger print authentication system that generates a three-dimensional representation of a fingerprint. High frequency sound waves are used as a medium for imaging finer details of the patterns on a fingertip, including the ridge and valley formations. Multiple frequencies and beam-forming are used to quickly map the ridges. Acoustic resonance is used to determine the depths of the intervening valleys.

Abstract translation: 一种生成指纹的三维表示的超声波指纹识别系统。 使用高频声波作为用于在指尖上形成更细微图案的介质，包括脊和谷地层。 多个频率和波束形成用于快速映射脊。 声共振用于确定中间山谷的深度。