Sound field expansion system for a video tape recorder

Details Sound field expansion system for a video tape recorder Sound field expansion system for a video tape recorder

1986-11-24

1989-03-14

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

369 87, 381 17, H04N 5782, H04R 500

Patent

active

048129216

ABSTRACT:
A sound field expansion system applicable to a magnetic recording and reproducing apparatus (VTR) which can expand the sound field in a simple construction. In the sound field expansion system, a circuit for virtually forming two comb filter characteristics is provided by adding a first audio signal and a second audio signal delayed by a predetermined interval of time with respect to the first audio signal and adding the first audio signal which is passed through a phase shift circuit which shifts the phase of the first audio signal so that the reproduced sound field can remarkably be expanded. Furthermore, a correction circuit for providing a predetermined frequency characteristic for the first or second audio signal is installed so that an acoustic image having a desired frequency band can be positioned. The first and second audio signals may be monaural or stereophonic and are derived from demodulations of audio frequency-modulated (AFM) signal recorded on a common track of a magnetic tape together with a one-field video signal in a frequency division multiplex mode and time-axis-compressed pulse-code-modulated audio (PCM) signal recorded on the common track together with the one-field video signal in a time share mode.

REFERENCES:
patent: 3845245 (1974-10-01), Takahashi
patent: 4164884 (1979-08-01), Kakehashi
patent: 4232190 (1980-11-01), Laiacona
patent: 4329544 (1982-05-01), Yamada
patent: 4352954 (1982-10-01), Franssen, deceased et al.
patent: 4453186 (1984-06-01), Watatani et al.
patent: 4542419 (1985-09-01), Morio et al.
patent: 4613912 (1986-09-01), Shibata
patent: 4625326 (1986-11-01), Kitzen et al.
patent: 4642812 (1987-02-01), Yoshio et al.
Toshiba Owner's Manual, "Video Cassette Recorder", V-S36 (1983).
Copending U.S. patent application Ser. No. 884,351.

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