Method and apparatus for rendering sound signal, and computer-readable recording medium

• US 10,674,299 B2
• Filed: 04/13/2015
• Issued: 06/02/2020
• Est. Priority Date: 04/11/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Chon, Sang-bae
• Primary Examiner(s): Truong, Kenny H
• Application Number:
  US15/303,362
• Publication Number:
  US 20170034639A1
• Time in Patent Office: 1,877 Days
• Field of Search: None
• CPC Class Codes: G10L 19/008 Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
• CPC Class Codes: 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
• CPC Class Codes: H04S 2420/01 Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
• CPC Class Codes: H04S 2420/03 Application of parametric coding in stereophonic audio systems
• CPC Class Codes: H04S 3/002 Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution control circuits for electronic adaptation of the sound field H04S7/30
• CPC Class Codes: 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

Abstract

A method of reproducing a multi-channel audio signal including an elevation sound signal in a horizontal layout environment is provided, thereby obtaining a rendering parameter according to a rendering type and configuring a down-mix matrix, and thus effective rendering performance may be obtained with respect to an audio signal that is not suitable for applying virtual rendering. A method of rendering an audio signal includes receiving a multi-channel signal includes a plurality of input channels to be converted into a plurality of output channels; determining a rendering type for elevation rendering based on a parameter determined from a characteristic of the multi-channel signal; and rendering at least one height input channel according to the determined rendering type, wherein the parameter is included in a bitstream of the multi-channel signal.

Claims

1. A method of rendering an audio signal, the method comprising:

receiving a plurality of input channel signals including at least one height input channel signal;

determining whether an output channel, corresponding to a height input channel signal among the at least one height input channel signal, is a virtual channel;

determining whether elevation rendering is possible based on a predetermined table for mapping the height input channel signal to a plurality of output channel signals;

when the output channel corresponding to the height input channel signal is the virtual channel and the elevation rendering is possible, obtaining an elevation rendering parameter;

when the output channel corresponding to the height input channel signal is not the virtual channel, obtaining a non-elevation rendering parameter; and

obtaining a downmix matrix, to convert the plurality of input channel signals into the plurality of output channel signals, based on at least one of the elevation rendering parameter and the non-elevation rendering parameter.

2. The method of claim 1, wherein the downmix matrix comprises at least one of a first downmix matrix for three-dimensional (3D) rendering and a second downmix matrix for two-dimensional (2D) rendering.

3. The method of claim 2, further comprising:

receiving a bitstream including a rendering3DType; and

when the rendering3DType is true, selecting the first downmix matrix, and when the rendering3DType is false, selecting the second downmix matrix.

4. The method of claim 1, wherein a layout according to the plurality of output channel signals is one of a 5.1 channel layout or a 5.0 channel layout.