# US 10,484,810 B2 · Method and device for rendering acoustic signal, and computer-readable recording medium

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- Number: US 10,484,810 B2
- Document ID: US10484810B2
- Status: Granted
- Kind: B2
- Application number: 16/379,211
- Filed: 2019-04-09
- Published: 2019-08-01
- Granted: 2019-11-19
- Earliest claimed: 2014-06-26
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Sang-Bae Chon; Sun-min Kim
- Web page: https://patentgrep.com/patent/US10484810B2

## CPC

- H04S 7/302: {Electronic adaptation of stereophonic sound system to listener position or orientation (H04S7/301 takes precedence)}
- H04S 3/008: {in which the audio signals are in digital form, i.e. employing more than two discrete digital channels (data reduction aspects thereof based on psychoacoustics G10L19/02)}
- H04S 5/005: {of the pseudo five- or more-channel type, e.g. virtual surround}
- H04S 2400/01: Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
- H04S 2400/03: Aspects of down-mixing multi-channel audio to configurations with lower numbers of playback channels, e.g. 7.1 -> 5.1 (H04S2400/01 takes precedence)
- H04S 2420/05: Application of the precedence or Haas effect, i.e. the effect of first wavefront, in order to improve sound-source localisation
- H04S: STEREOPHONIC SYSTEMS

## Abstract

A method of elevation rendering an audio signal includes receiving multichannel signals including a height input channel signal of a predetermined elevation angle, obtaining first elevation rendering parameters for a height input channel signal of a standard elevation angle, obtaining a delayed height input channel signal by applying a predetermined delay to a height input channel signal, updating the first elevation rendering parameters based on the predetermined elevation angle, obtaining second elevation rendering parameters based on the label of the height input channel signal and labels of two output channel signals, and elevation rendering the multichannel signals and the delayed height input channel signal to output a plurality of output channel signals of an elevated sound image, based on the updated first elevation rendering parameters and the second elevation rendering parameters.

## Claims

### Claim 1

A method of elevation rendering an audio signal, the method comprising:
receiving multichannel signals including a height input channel signal of a predetermined elevation angle;
obtaining first elevation rendering parameters for a height input channel signal of a standard elevation angle;
obtaining a delayed height input channel signal by applying a predetermined delay to a height input channel signal, wherein a label of the height input channel signal is one of frontal height channel labels;
updating the first elevation rendering parameters based on the predetermined elevation angle, in case that the predetermined elevation angle is higher than the standard elevation angle;
obtaining second elevation rendering parameters based on the label of the height input channel signal and labels of two output channel signals, wherein the labels of the two output channel signals are surround channel labels; and
elevation rendering the multichannel signals and the delayed height input channel signal to output a plurality of output channel signals of an elevated sound image, based on the updated first elevation rendering parameters and the second elevation rendering parameters.

### Claim 2 (depends on 1)

The method of claim 1, wherein the updating of the first elevation rendering parameters comprises updating of at least one of panning gains or elevation filter coefficients.

### Claim 3 (depends on 2)

The method of claim 2, wherein the updating of the panning gains comprises updating the panning gains based on an equation of
GvH,5(iin)=10(0.25×min(max(elv−35,0),25))/20×GvH0,5(iin) or
GvH,6(iin)=10(0.25×min(max(elv−35,0),25))/20×GvH0,6(iin),
wherein, GvH0, 5˜6(iin) are the first elevation rendering parameters and GvH,5˜6(iin) are the updated elevation rendering parameters, in case that the standard elevation angle is 35 degree and a label of the height input channel signal iin is a top front center.