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The Matsushita Electric Industrial Co., Ltd. patent solves the following problem:
The present invention relates to a sound field controller for reproducing sound effects for use in audio equipment or the audio-visual (AV) equipment.
Our analysis of this patent is as follows:
Matsushita Electric Industrial Co., Ltd.’s patent US 5381482 A deals with Sound field controller.
A sound field controller to create open source voice by adjusting the amplitude and delay during a voice signal to the voice perceived plural audience as the voice of a place from the specific location before the speaker, and for further controlling the impact of open source voice in evaluating the quality of the voice signal sources. fir controller includes filtering to produce a voice pattern signal, fir filtering to create a righteous voice pattern signal, a first delay circuit for delaying the left and right sound pattern signal by a first predetermined time and the use of delayed left and right sound pattern signal to the left and right speakers, respectively, to introduce an apparent sound sources located in left behind a listener center; and a second delay circuit for delaying the left and right sound pattern signal to a second predetermined time and applying the delayed left and right sound pattern signal on the right and left speaker , respectively, to introduce an apparent sound source located on the right side of a center listener.
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