Inventor

SERIKAWA MITSUHIKO

JP21 patents

Patents

21 patents

US5796845AAug 18, 1998

Sound field and sound image control apparatus and method

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD149 citations98

US5442712AAug 15, 1995

Sound amplifying apparatus with automatic howl-suppressing function

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD100 citations96

US4868357ASep 19, 1989

Microwave heating appliance for automatically heating an object on the basis of a distinctive feature of the object

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD73 citations96

US5381482AJan 10, 1995

Sound field controller

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD87 citations95

US6477490B2Nov 5, 2002

Audio signal compression method, audio signal compression apparatus, speech signal compression method, speech signal compression apparatus, speech recognition method, and speech recognition apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations92

US6408079B1Jun 18, 2002

Distortion removal apparatus, method for determining coefficient for the same, and processing speaker system, multi-processor, and amplifier including the same

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD41 citations92

US6311153B1Oct 30, 2001

Speech recognition method and apparatus using frequency warping of linear prediction coefficients

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD42 citations92

US5684881ANov 4, 1997

Sound field and sound image control apparatus and method

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD23 citations92

US5617478AApr 1, 1997

Sound reproduction system and a sound reproduction method

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD38 citations92

US5375188ADec 20, 1994

Music/voice discriminating apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD35 citations92

US4899390AFeb 6, 1990

Thin speaker having an enclosure within an open portion and a closed portion

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD44 citations92

US4751739AJun 14, 1988

Apparatus and method for controlling tone quality

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations92

US5164840ANov 17, 1992

Apparatus for supplying control codes to sound field reproduction apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD37 citations91

US5745586AApr 28, 1998

Sound quality control system

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD25 citations90

US6539468B1Mar 25, 2003

Data copying system, data copying method, data reading apparatus, data writing apparatus and data recording medium

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations84

US5073946ADec 17, 1991

Thin speaker having an enclosure with an open portion and a closed portion

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations82

US5233661AAug 3, 1993

Sound field variable apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations74

US5123050AJun 16, 1992

Sound field control system

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD17 citations74

US5144673ASep 1, 1992

Reflection sound compression apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations73

US5073942ADec 17, 1991

Sound field control apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations73

US5023913AJun 11, 1991

Apparatus for changing a sound field

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations72