U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Video reproducing apparatus for maintaining picture quality during high speed search functions

Patent 5319500 Issued on June 7, 1994. Estimated Expiration Date: Icon_subject January 2, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Magnetic recording and reproducing apparatus with device for tracking control of rotary magnetic heads
Patent #: 4365279
Issued on: 12/21/1982
Inventor: Kinjo

Magnetic reproducing apparatus having a capstan servo circuit
Patent #: 4539606
Issued on: 09/03/1985
Inventor: Itoh

System for reproducing information signals on a magnetic tape which incrementally adjusts, in a plurality of steps the speed of the magnetic tape and the positioning and rotational speed of the magnetic head upon a change of mode
Patent #: 4636874
Issued on: 01/13/1987
Inventor: Hoogendoorn ,   et al.

Video signal recording apparatus
Patent #: 4656529
Issued on: 04/07/1987
Inventor: Sakamoto

High speed reproduction method and apparatus
Patent #: 4656537
Issued on: 04/07/1987
Inventor: Toba ,   et al.

Multiple mode rotary head reproducing apparatus with integrator control of speed
Patent #: 4677503
Issued on: 06/30/1987
Inventor: Nagasawa ,   et al.

Reproducing apparatus
Patent #: 4771345
Issued on: 09/13/1988
Inventor: Watanabe

Servo tracking for helical scan recorder
Patent #: 5068757
Issued on: 11/26/1991
Inventor: Hughes, et al.

Apparatus having a field memory for reproducing video signals Patent #: 5130858
Issued on: 07/14/1992
Inventor: Ebara, et al.

Inventor

Application

No. 815529 filed on 01/02/1992

US Classes:

386/78, Locus or track control360/70, Synchronizing moving-head moving-record recorders386/90Digital technique

Examiners

Primary: Sniezek, Andrew L.

Attorney, Agent or Firm

International Class

H04N 005/78

Foreign Application Priority Data

1991-01-09 KR

Abstract

A video reproducing apparatus which controls a revolution speed of the rotary drum to have a variable speed according to the tape transport speed during a special playback, and maintains the inclination angle of the head running locus to be the same as that during a standard playback. The apparatus comprises a capstan servo, a drum servo, a time base corrector, and a control circuit which controls the above elements, thereby displaying a clear picture without noise bars during the special playback modes.

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