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Apparatus and method of reproducing virtual sound

A sound reproduction and sound channel technology, applied in the direction of binaural system, stereo system, quasi-stereo system, etc., can solve the problems of unrecognizable sound information, virtual sound quality decline, and crosstalk elimination decline, etc.

Inactive Publication Date: 2005-06-22
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

Therefore, the conventional virtual sound technology provides the exact sound information to where the sound source is located, however, it cannot recognize the sound information of the position moved away from the sound source
In addition, since the conventional technology for reproducing 2-channel virtual sound was developed on the assumption that each speaker has a flat frequency response, when a deteriorated speaker that does not have a smooth frequency response is used, or when the speaker's Virtual sound quality degrades significantly when the frequency response is uneven due to the room audio setup in which the speakers are installed
Furthermore, in the conventional technique of reproducing 2-channel virtual sound, even if the listener moves only a little sideways from the sweet spot area located at the center of the two speakers, the virtual sound quality is remarkably degraded
Furthermore, in the conventional technology for reproducing 2-channel virtual sound, since the crosstalk cancellation algorithm is only suitable for a predetermined speaker arrangement, the crosstalk cancellation in other speaker arrangements is significantly degraded

Method used

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  • Apparatus and method of reproducing virtual sound
  • Apparatus and method of reproducing virtual sound
  • Apparatus and method of reproducing virtual sound

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Embodiment Construction

[0021] 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 refer to like parts throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures.

[0022] FIG. 1 is a block diagram illustrating an audio reproducing system according to an embodiment of the present general inventive concept.

[0023] Referring to FIG. 1 , the audio reproducing system may include a virtual sound reproducing device 100 , left and right amplifiers 170 and 175 , left and right speakers 180 and 185 , and left and right microphones 190 and 195 . The virtual sound reproduction device 100 may include a Dolby Pro Logic decoder 110 , an audio decoder 120 , a downmix unit 130 , a crosstalk cancellation unit 140 , a spatial compensator 150 and a digital-to-analog converter (DAC) 160 .

[0024] The Dolby ...

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Abstract

An apparatus and method for reproducing 2-channel virtual sound while dynamically controlling sweet spot and crosstalk cancellation are disclosed. The method includes: receiving a broadband signal, setting compensation filter coefficients according to the response characteristics of the frequency band and setting a stereo transfer function according to spectrum analysis; multi-channel signal to down-mix the input multi-channel signal into a two-channel signal, eliminate the crosstalk of the down-mixed signal on the basis of the compensation filter coefficient calculated using the set stereo transfer function, and The compensation filter coefficients are set for each frequency band based on the level and phase of the compensated signal for crosstalk cancellation.

Description

[0001] This application claims priority from Korean Patent Application No. 2003-92510 filed on December 17, 2003 in the Korean Intellectual Property Office, which is hereby incorporated by reference in its entirety. technical field [0002] The present general inventive concept relates to an audio reproducing system, and more particularly, to an apparatus and method for reproducing 2-channel virtual sound capable of dynamically controlling a sweet spot and crosstalk cancellation. Background technique [0003] Generally, a virtual sound reproduction system provides a surround sound effect similar to a 5.1-channel system, but uses only two speakers. [0004] The technology related to the virtual sound reproduction system is disclosed in WO 99 / 49574 (PCT / AU99 / 00002 applied on January 6, 1999, titled: audio signal processing method and device (AUDIO SIGNAL PROCESSING METHOD AND APPARATUS)) and WO97 / 30566 (PCT / GB97 / 00415 was appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/12H04S1/00H04S3/00H04S5/02H04S7/00
CPCH04S3/008H04S7/301H04S7/307H04S2400/01H04S1/00
Inventor 李俊弦张成哲
Owner SAMSUNG ELECTRONICS CO LTD
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