Method and an apparatus for decoding an audio signal

• US 7,715,569 B2
• Filed: 10/02/2009
• Issued: 05/11/2010
• Est. Priority Date: 12/07/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Hyen-O, Jung, Yang-Won
• Primary Examiner(s): Chin; Vivian
• Assistant Examiner(s): KURR, JASON RICHARD
• Application Number:
  US12/573,077
• Publication Number:
  US 20100010821A1
• Time in Patent Office: 221 Days
• Field of Search: 700/94, 704/500, 704/504, 381/22, 381/23, 381/2, 381/119, 381 17- 19, 386/54, 386/96, 369/1, 369/4
• US Class Current: 381/22
• 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 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 3/008 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
• CPC Class Codes: H04S 7/302 Electronic adaptation of stereophonic sound system to listener position or orientation H04S7/301 takes precedence

Abstract

A method for processing an audio signal, comprising: receiving a downmix signal, a first multi-channel information, and an object information; processing the downmix signal using the object information and a mix information; and, transmitting one of the first multi-channel information and a second multi-channel information according to the mix information, wherein the second channel information is generated using the object information and the mix information is disclosed.

Claims

1. A method for processing an audio signal performed by an audio coding system, comprising:

receiving a downmix signal comprising at least one object signal and at least one channel signal;

receiving object information determined when the downmix signal is generated;

receiving first multi-channel information;

receiving mix information including mode information indicating whether the first multi-channel information is applied to the processed downmix;

processing the downmix signal using the object information and the mix information; and

,

generating second multi-channel information using the object information and the mix information, according to the mode information;

transmitting one of the first multi-channel information and the second multi-channel information according to the mode information.

2. The method of claim 1, further comprising:

generating a multi-channel signal using the processed downmix signal and one of the first multi-channel information and the second multi-channel information.

3. An apparatus for processing an audio signal, comprising:

a bitstream de-multiplexer receiving a downmix signal comprising at least one object signal and at least one channel signal, object information determined when the downmix signal is generated, and first multi-channel information; and

,

an object decoder receiving mix information including mode information indicating whether the first multi-channel information is applied to the processed downmix, processing the downmix signal using the object information and mix information, generating second multi-channel information using the object information and the mix information, according to the mode information, and transmitting one of the first multi-channel information and second multi-channel information according to the mode information.

4. The apparatus of claim 3, further comprising:

a multi-channel decoder generating a multi-channel signal using the processed downmix signal and one of the first multi-channel information and the second multi-channel information.