Blank detector for cassette tape player

Details Blank detector for cassette tape player Blank detector for cassette tape player

1993-12-06

1995-03-21

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Inter-record gap processing

360 46, G11B 509

Patent

active

054001889

ABSTRACT:
Digital signal processing (DSP) employing a differential mean calculation automatically distinguishes sections of blank tape from program material (such as music or voice) on cassette tapes. Blank tape produces a negligible differential mean value while program material produces substantial differential mean values. Thus, each differential mean is compared to a threshold so that a cassette player can be commanded to fast forward through a blank section of tape. A music envelope detector insures that low amplitude music signals are not detected as blank.

REFERENCES:
patent: 3893177 (1975-07-01), Takenaka
patent: 4115821 (1978-09-01), Okada
patent: 4176380 (1979-11-01), Koski et al.
patent: 4198664 (1980-04-01), Yasunaga et al.
patent: 4288823 (1981-09-01), Yamamoto et al.
patent: 4290090 (1981-09-01), Yamamoto et al.
patent: 4365278 (1982-12-01), Takizawa et al.
patent: 4399474 (1983-08-01), Coleman, Jr.
patent: 4492990 (1985-01-01), Johnson, Jr.
patent: 4564870 (1986-01-01), Kitamura
patent: 4578721 (1986-03-01), Brannan, Jr.
patent: 4680652 (1987-07-01), Ito
patent: 4700241 (1987-10-01), Yasuda et al.
patent: 4845574 (1989-07-01), Ii et al.
patent: 5216555 (1993-06-01), Sieborger et al.
patent: 5223989 (1993-06-01), Craig et al.
patent: 5237554 (1993-08-01), Shenshu et al.
patent: 5241521 (1993-08-01), Shigemori
patent: 5276666 (1994-01-01), Gunther et al.

Affiliated with

Also associated with

Rating

Blank detector for cassette tape player does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Blank detector for cassette tape player, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blank detector for cassette tape player will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1153757