Matsushita Electric Industrial Co., Ltd.

Hikari Hashimoto

Akihisa Kawamura

Masaharu Matsumoto

Mitsuhiko Serikawa

Seiichi Ishikawa

Katsuaki Satoh

Katsuaki Sato

Ryo Tagami

Hiroko Yoshida

Control codes for controlling processing of an audio signal by a sound field variation circuit to produce desired sound fields are recorded on a monaural track of a video tape concurrent with recording of video and audio signals, and can thereby be subsequently played back for producing sound fields which are respectively synchronized with video images.

Apparatus for supplying control codes to sound field reproduction

An apparatus for changing a sound field, comprising at least two signal processing means, which can smoothly and continuously switch a sound field into an arbitrary sound field without a break of signals by alternately switching one of the signal processing means into the other.

Apparatus for changing a sound field

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Kobe, Japan

Hikari Hashimoto