公开(公告)号：US10015618B1

公开(公告)日：2018-07-03

申请号：US15666220

申请日：2017-08-01

Applicant: Google Inc.

Inventor： Willem Bastiaan Kleijn ,  Andrew Allen ,  Jan Skoglund ,  Sze Chie Lim

IPC: H04R5/02 ,  H04S7/00 ,  H04S3/00

CPC classification number: H04S7/303 ,  H04S3/008 ,  H04S3/02 ,  H04S2400/01 ,  H04S2400/11 ,  H04S2420/11

Abstract: Techniques of rendering sound for a listener involve producing, as the amplitude of each of the source driving signals, a sum of two terms: a first term based on a solution s† to the equation b=A·s, and a second term based on a projection of a specified vector ŝ onto the nullspace of A, ŝ not being a solution to the equation b=A·s. Along these lines, in one example, the first term is equivalent to a Moore-Penrose pseudoinverse, e.g., AH(AAH)−1·b. In general, any solution to the equation b=A·s is satisfactory. The specified vector that is projected onto the nullspace of A is defined to reduce the coherence of the net sound field. Advantageously, the resulting operator is both linear time-invariant and idempotent so that the sound field may be faithfully reproduce both inside the RSF and at a sufficient range outside the RSF to cover a human head.

公开(公告)号：US20180218740A1

公开(公告)日：2018-08-02

申请号：US15417550

申请日：2017-01-27

Applicant: Google Inc.

Inventor： Willem Bastiaan Kleijn ,  Jan Skoglund ,  Sze Chie Lim

IPC: G10L19/008 ,  G10L19/20 ,  G10L19/24 ,  H04S3/00

CPC classification number: G10L19/008 ,  G10L19/173 ,  G10L19/20 ,  G10L19/24 ,  H04S3/002 ,  H04S3/008 ,  H04S7/308 ,  H04S2420/11

Abstract: A method includes: receiving a representation of a soundfield, the representation characterizing the soundfield around a point in space; decomposing the received representation into independent signals; and encoding the independent signals, wherein a quantization noise for any of the independent signals has a common spatial profile with the independent signal.

公开(公告)号：US20180182412A1

公开(公告)日：2018-06-28

申请号：US15412812

申请日：2017-01-23

Applicant: Google Inc.

Inventor： Willem Bastiaan Kleijn ,  Sze Chie Lim

IPC: G10L21/0308 ,  G10L25/18 ,  G10L25/63 ,  G10L25/87

Abstract: A method includes: receiving time instants of audio signals generated by a set of microphones at a location; determining a distortion measure between frequency components of at least some of the received audio signals; determining a similarity measure for the frequency components using the determined distortion measure; and processing the audio signals based on the determined similarity measure.

公开(公告)号：US10770091B2

公开(公告)日：2020-09-08

申请号：US15412812

申请日：2017-01-23

Applicant: Google Inc.

Inventor： Willem Bastiaan Kleijn ,  Sze Chie Lim

IPC: G10L21/028 ,  G10L21/0308

Abstract: A method includes: receiving time instants of audio signals generated by a set of microphones at a location; determining a distortion measure between frequency components of at least some of the received audio signals; determining a similarity measure for the frequency components using the determined distortion measure; and processing the audio signals based on the determined similarity measure.

公开(公告)号：US10332530B2

公开(公告)日：2019-06-25

申请号：US15417550

申请日：2017-01-27

Applicant: Google Inc.

Inventor： Willem Bastiaan Kleijn ,  Jan Skoglund ,  Sze Chie Lim

IPC: H04R5/00 ,  G10L19/008 ,  G10L19/20 ,  G10L19/24 ,  H04S3/00 ,  H04S7/00 ,  G10L19/16

Abstract: A method includes: receiving a representation of a soundfield, the representation characterizing the soundfield around a point in space; decomposing the received representation into independent signals; and encoding the independent signals, wherein a quantization noise for any of the independent signals has a common spatial profile with the independent signal.