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Class Information
Number: 386/9
Name: Television signal processing for dynamic recording or reproducing > Processing of color television signal for dynamic recording or reproducing > Signal amplitude level control
Description: Subject matter comprising means for controlling the instantaneous amplitude level or the envelope level of the color television signal during recording or reproducing.

Sub-classes under this class:

Class Number Class Name Patents
386/10 Including color burst or reference signal 47

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
6285765 Method and apparatus for reducing effects of copy protection of composite video signal Sep. 4, 2001
6172713 Color television system determination circuit Jan. 9, 2001
6173110 Magnetic recording and reproduction apparatus having a recording characteristic correction function of a video signal Jan. 9, 2001
6134373 System for recording and reproducing a wide bandwidth video signal via a narrow bandwidth medium Oct. 17, 2000
6101312 Automatic picture quality controller Aug. 8, 2000
6014180 Automatic gain control loop circuit Jan. 11, 2000
RE36339 Circuit for tape duplication in video tape recorder Oct. 12, 1999
5913007 Envelope detection apparatus for video cassette recorder Jun. 15, 1999
5909531 Television signal recording/reproducing apparatus and method with DC shifter Jun. 1, 1999
5875278 Recording/reproducing device comprising a plurality of audio channels and a rotary encoder which controls two independent level adjusting means Feb. 23, 1999
5745635 Adaptive deemphasis and reemphasis of high frequencies in video tape recording, utilizing a recorded control signal Apr. 28, 1998
5724470 Television signal recording/reproducing apparatus and method with DC shifter Mar. 3, 1998
5673355 Deemphasis & Subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal Sep. 30, 1997
5606424 Simple high-band record modulation circuit in 8MM video tape recorder Feb. 25, 1997
5598273 Recording control device and method utilizing a test signal having multiple frequencies Jan. 28, 1997
5596418 Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal Jan. 21, 1997
5579119 Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium Nov. 26, 1996
5532829 Automatic color control circuit having a control signal storing capacitor Jul. 2, 1996
5448367 Apparatus for automatically controlling generation of a head switching signal Sep. 5, 1995
5432612 Multi-mode video signal playback and display device Jul. 11, 1995
5430495 Video playback apparatus capable of varying caption brightness based on audio level Jul. 4, 1995
5430551 Video recorder with distortion corrector circuit Jul. 4, 1995
5418619 Apparatus and method for selectively adapting a playback characteristic to meet video performance requirements May. 23, 1995
5404230 Color burst phase correcting color signal reproducing circuit Apr. 4, 1995
5386296 Chroma burst detection system Jan. 31, 1995
5377012 Color signal processing circuit for a video cassette recorder Dec. 27, 1994
5371601 Luminance signal unfolding and reemphasizing circuit Dec. 6, 1994
5347319 Circuit for regulating the color subcarrier amplitude in a video recorder Sep. 13, 1994
5333060 Video signal processing circuit of a video signal recorder/reproducer Jul. 26, 1994
5321518 Video signal recording and reproducing apparatus using an added specific signal during recording Jun. 14, 1994
5287174 Vertical resolution correcting circuit for video signal Feb. 15, 1994
5274458 Video camera Dec. 28, 1993
5249063 Information signal processing device for offset removal and signal identification of color difference signals Sep. 28, 1993
5235431 Circuit used in a camcorder for monitoring the recorded state of a tape during recording by simultaneous playing back of the tape Aug. 10, 1993
5233435 Tape recording system for video cassette tape recorder Aug. 3, 1993
5227891 Method of recording fine color video signal on optical recording media and method of reproducing thus recorded fine color video signal Jul. 13, 1993
5223946 Apparatus using comparator to detect drop-out of recorded video signal Jun. 29, 1993
5218447 Method and apparatus for identifying the reproduction mode of a video tape recorder Jun. 8, 1993
5206738 Magnetic recording apparatus having a means for determining recording current Apr. 27, 1993
5194963 Dual deck videocassette recorder system Mar. 16, 1993
5187590 Luminance signal recording circuit and method for maintaining compatibility in reproducing between different video systems Feb. 16, 1993
5184228 Recording circuit for mirror mother tape Feb. 2, 1993
5161030 Method and circuit for enhancing image quality of a video tape recorder (VTR) using motion adaptive spectrum folding method Nov. 3, 1992
5144434 Video signal processing device using look-up table Sep. 1, 1992
5136392 Frequency demodulating circuit for avoiding black reversing phenomenon Aug. 4, 1992
5130810 Method and apparatus for processing a video signal so as to prohibit the making of acceptable videotape recordings Jul. 14, 1992
5121266 Magnetic recording/reproducing apparatus Jun. 9, 1992
5083211 Method and apparatus for optimizing video recording and reproduction Jan. 21, 1992
5063452 Magnetic recording and/or reproducing apparatus having means for preventing audio-to-video crosstalk and noise generation Nov. 5, 1991
5057934 Circuit for tape duplication in video tape recorder Oct. 15, 1991

1 2 3

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