公开(公告)号：US09876901B1

公开(公告)日：2018-01-23

申请号：US15261635

申请日：2016-09-09

Applicant: Google Inc.

Inventor： Alessio Bazzica ,  Minyue Li

IPC: H04M3/22 ,  G10L15/00 ,  H04M3/32 ,  G10L15/26 ,  G10L25/51 ,  G10L25/78 ,  G10L15/05 ,  G10L13/08 ,  H04L29/06 ,  H04L12/26

CPC classification number: H04M3/323 ,  G10L13/08 ,  G10L15/05 ,  G10L15/26 ,  G10L25/51 ,  G10L25/78 ,  H04L43/0852 ,  H04L65/80 ,  H04M3/2236 ,  H04M2201/40

Abstract: Aspects of the disclosure simulate a conversation over a real-time communication system and a reference script shared between the communication devices serves as a basis for comparison against the received speech-recognized conversation. A method of evaluating call quality of a real-time communication system that includes at least two communication devices is disclosed that includes receiving a reference script, the reference script containing linguistic contents of an audio signal being sent to one of the communication devices; generating an evaluation transcript by applying speech recognition to the audio signal being received; comparing the reference script with the evaluation transcript; and generating a call quality metric of the real-time communication system based on the comparison. The call quality metric may also include a communication delay which may be evaluated by determining a duration of a speaking turn; determining a duration of a listening turn from the audio signal being received by one of the communication devices; and estimating a communication delay of the audio signal based on the duration of the speaking turn and the listening turn.

公开(公告)号：US10141000B2

公开(公告)日：2018-11-27

申请号：US15182751

申请日：2016-06-15

Applicant: GOOGLE INC.

Inventor： Minyue Li ,  Jan Skoglund ,  Willem Bastiaan Kleijn

IPC: G10L19/24 ,  G10L19/008 ,  G10L19/02 ,  G10L19/035 ,  G10L19/16 ,  G10L19/00

Abstract: Provided are methods, systems, and apparatus for hierarchical decorrelation of multichannel audio. A hierarchical decorrelation algorithm is designed to adapt to possibly changing characteristics of an input signal, and also preserves the energy of the original signal. The algorithm is invertible in that the original signal can be retrieved if needed. Furthermore, the proposed algorithm decomposes the decorrelation process into multiple low-complexity steps. The contribution of these steps is generally in a decreasing order, and thus the complexity of the algorithm can be scaled.

公开(公告)号：US20180048420A1

公开(公告)日：2018-02-15

申请号：US15236025

申请日：2016-08-12

Applicant: Google Inc.

Inventor： Tina le Grand ,  Niklas Blum ,  Minyue Li ,  Henrik Lundin ,  Michael Tschumi ,  Alexander Narest

IPC: H04L1/00 ,  H04W24/08

CPC classification number: H04L1/0007 ,  H04L1/0009 ,  H04L1/0014 ,  H04L1/0015 ,  H04L1/0033

Abstract: Control logic determines when a network condition has changed by evaluating network condition data. Based on a detected network condition change, the control logic reorders an encoder parameter controller execution sequence of a plurality of encoder parameter controllers. The control logic configures the plurality of reordered encoder parameter controllers so that an encoder parameter determination from a prior encoder parameter controller is used as a decision input for a subsequent encoder parameter controller. An encoder encodes data, such as audio data, video data or other type of data using the generated encoder control parameters from the reordered plurality of encoder parameter controllers. A related method is also disclosed.