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Method and apparatus to provide active audio matrix decoding based on the positions of speakers and a listener

A technology of audio matrix and decoding method, which is applied in the direction of stereo system, quasi-stereo system, electrical components, etc. It can solve the problem that the matrix decoder does not consider the virtual sound source position, it is difficult to represent the change of the sound source position, and the ability to dynamically represent the sound image is insufficient, etc. question

Inactive Publication Date: 2007-08-01
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

[0009] However, the conventional matrix decoder shown in Fig. 1 does not consider the location of virtual sound sources generated in a multi-channel environment, resulting in inability to accurately perform sound image localization
Also, since it is difficult to express the position change of the sound source moving in the virtual space, the ability to dynamically express the sound image is insufficient

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  • Method and apparatus to provide active audio matrix decoding based on the positions of speakers and a listener
  • Method and apparatus to provide active audio matrix decoding based on the positions of speakers and a listener
  • Method and apparatus to provide active audio matrix decoding based on the positions of speakers and a listener

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[0035] Reference will now be made in detail to embodiments of the present general inventive concept, examples of which are illustrated in the accompanying drawings, wherein like reference numerals will refer to like parts throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures.

[0036] FIG. 2 is a block diagram illustrating an active audio matrix decoding device according to an embodiment of the present general inventive concept.

[0037] The active audio matrix decoding device of Fig. 2 comprises loudspeaker component extraction unit 200, passive matrix decoder unit 210, signal correction unit 214, channel power vector extraction unit 220, virtual sound source power vector estimation unit 230, global power vector extraction unit 240 , channel selection unit 250 , and channel power allocation unit 260 .

[0038] First, a signal providing unit (not shown) receives a signal from a video tape, video d...

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Abstract

An active audio matrix decoding method and apparatus to generate multi-channel audio signals from a stereo channel audio signal. The method includes: decoding a stereo channel audio signal into a multi-channel signal, extracting a power vector of each channel signal by multiplying a magnitude of each decoded channel signal by positions of a plurality of channel speakers, extracting a vector of a virtual sound source existing between each channel by linearly combining power vector values of each decoded channel, extracting a vector value of a dominant sound image by linear combination of the vectors of the extracted virtual sound sources and normalizing the position of each channel speaker with respect to the vector value of the dominant sound image, and distributing a gain value to each channel position by comparing the magnitude of an entire decoded channel signal with the magnitude of each channel signal.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of US Patent Application Serial No. 11 / 535234 filed on September 26, 2006, entitled "METHOD AND APPARATUS TO PROVIDE ACTIVE MATRIX DECODING" (METHOD AND APPARATUS TO PROVIDE ACTIVE MATRIX DECODING). technical field [0003] The present general inventive concept relates to audio reproduction systems, and, more particularly, to an active audio matrix decoding method based on speaker and listener positions, and an apparatus therefor. Background technique [0004] Typically, in the past, terrestrial broadcasts have been the primary source of information for movies when watching them at home. However, recently, video tapes, video discs, and satellite broadcasts have become popular and widely used. Therefore, you can enjoy the original soundtrack of the movie at home. In video tapes, DVDs, and satellite broadcasts that provide original sound, multi-channel audio signals are encode...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S3/02H04S7/00
CPCH04S5/005H04S3/02
Inventor 文瀚吉阿洛拉·马尼什
Owner SAMSUNG ELECTRONICS CO LTD
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