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Class 386/22 - Crosstalk


Subclass of Class 386 - Television signal processing for dynamic recording or reproducing
Definition: Subject matter for the reduction or elimination of noise
No. of patents: 65
Last issue date: 11/28/2006


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NumberTitleIssue Date
7142501Method and apparatus for eliminating near-end crosstalk in a digital subscriber line system
A method and apparatus for eliminating near-end crosstalk in a communication network are disclosed. Crosstalk generated by communication occurring on a second line is detected on a first line and the phase of the crosstalk detected on the first line is determined. A...
11/28/2006
6925244Apparatus for recording/reproducing high resolution video signal
A video signal recording/reproducing apparatus for recording/reproducing a high resolution video signal wherein the video resolution is enhanced by shifting a carrier frequency to a higher band in frequency modulation in a VCR's video signal recording mode, and by d...
08/02/2005
6900848Crosstalk reduction in a video signal selector
A video signal input selector is subject to cross coupling between selectable video signals. The input selector comprises a video amplifier coupled to amplify a video signal selected from said selectable video signals. A controllable switch has first and second elem...
05/31/2005
6832041VIDEO RECORDING SYSTEM UTILIZING HOST-PROCESSOR-RESIDENT ERROR RECOVERY TO TRANSFER NON-TIME-CRITICAL, ERROR-INTOLERANT DATA SEGMENTS WHILE TRANSFERRING TIME-CRITICAL, ERROR-TOLERANT STREAMING DATA SEGMENTS AT A REQUIRED DATA TRANSFER RATE
The present invention may be regarded as a video recording system and method of transferring a non-time-critical, error-intolerant data segment stored or to be stored on a disk drive, which is responsive to a set of data transfer commands generated by a host process...
12/14/2004
6633340Video signal processor
A video signal processor reduces the deterioration of image quality due to the superposition of noise on a sync signal included in a luminance signal. A frequency discriminator outputs a first error signal if a ratio of the frequency of a frequency-modula...
10/14/2003
6393596Missing pulse detector using synchronous detection
A data decoder for decoding digital data in a high frequency signal in an optical storage device. A carrier signal derived from the high frequency passed through a zonal bandpass filter and a limiter is multiplied by the high frequency signal passed throu...
05/21/2002
6332056Circuit arrangement for processing a video signal, including means for avoiding a vertical color shift at horizontal color transitions
A video recorder, includes: a filter for performing a comb-filtering operation and supplying a comb-filtered component of a video signal; controllable influencing apparatus for terminating the output of the comb-filtered component and activating instead, ...
12/18/2001
6038372Crosstalk removing apparatus during digital magnetic reproduction
A crosstalk removing apparatus for digital magnetic reproduction is provided in which a clamp circuit is connected between a playback amplifier and a playback equalizer. An effect of crosstalk from a neighboring track is effectively removed using the clam...
03/14/2000
5748830Color signal processor for removing leakage components
A color signal processor is provided for removing a leakage component from a harmonic wave of a color signal, which causes crosstalk on a screen when a video signal is reproduced from or recorded on a recording medium. To remove the leakage component of t...
05/05/1998
5555096Frequency folding and unfolding circuits of a video signal recording/reproducing apparatus
Folding and unfolding circuits of a video signal in a video recording/reproducing apparatus for recording a video signal of a full bandwidth including a chroma signal and a luma signal on a recording medium having an effective limited bandwidth and reprod...
09/10/1996
5526126Signal processor for VTR which converts color under signals to color signals
A first reproduced color under signal is delayed by one or two horizontal periods by a delay circuit, and this delayed second reproduced color under signal and the aforementioned first reproduced color under signal have their frequencies converted individ...
06/11/1996
5392127Comb filter circuit on the reproduction side of the color channel of a video recorder
A comb filter circuit (1) with a usual comb filter (3) contains a circuit to detect line-parallel color edges. To that effect, envelope curves (Sf2, Sf3) are created from the addition signal (Sb) and the subtraction signal (Sc) of the delayed and the unde...
02/21/1995
5287174Vertical resolution correcting circuit for video signal
In a vertical resolution correcting circuit, a noncorrelation component in a vertical direction of a luminance signal included in a video signal is detected. In a region where it is considered that the detected noncorrelation component consists of vertica...
02/15/1994
5243474Automatic tracking control system which utilizes a crosstalk envelope signal to vary a tracking control signal
An automatic tracking control system with a servo loop, controlled by a tracking control signal, that adjusts the position of a pickup head in relation to tracks scanned by the head. Adjacent-track crosstalk is extracted by a crosstalk detector and envelo...
09/07/1993
5218448Signal reproducing apparatus
A signal reproducing apparatus reproduces a video signal from a recording medium in which a first modulation signal has a video signal frequency-modulated at carrier frequency fc and a second modulation wave has a second signal modulated in a lower freque...
06/08/1993
5179450Video signal processing apparatus and method for the time base compensation
A video signal processing apparatus and method are provided in which time base errors in the luminance and color signals of a video signal reproduced from a recording medium are compensated. Time base errors in the luminance signal are reduced by storing ...
01/12/1993
5151792Video signal reproducing apparatus with means for producing a crosstalk eliminated luminance output signal
A chrominance signal reproducing circuit reproduces a chrominance signal with reduced crosstalk, as by using a comb filter, and a luminance signal reproducing circuit reproduces a luminance signal. The reproduced luminance signal is delayed by a horizonta...
09/29/1992
5140433Noise reduction circuit for reducing video signal noise by mixing current and previous video signal
A noise reduction circuit in a recording medium player is disclosed in which the time-axis of a video signal read out from a memory to be used for noise reduction is changed by a shift command signal for changing the time-axis of a video signal in order t...
08/18/1992
5136392Frequency demodulating circuit for avoiding black reversing phenomenon
In a video reproducing apparatus having a head for reproducing a recorded frequency modulated signal and a frequency demodulator for demodulating the reproduced signal output from the head, a circuit interposed between the head and frequency demodulator c...
08/04/1992
5083213Chrominance signal processing circuit and video tape recorder having function of processing chrominance signal
A chrominance signal processing circuit of VTR comprises a first frequency converting circuit (3) for converting a frequency of a chrominance signal in a video signal. The frequency converting circuit multiplies an inputted chrominance signal and a four-p...
01/21/1992
5077616Video recorder with increased bandwidth recording
A luminance signal is frequency modulated with an FM carrier to generate a frequency modulated signal having a frequency spectrum within a frequency band of 1.6 to 8 megahertz. A second signal such as a line sequential color signal is single sideband modu...
12/31/1991
5032902Playback color processing circuit
A playback color processing circuit for a video tape recorder includes an automatic phase control loop and has two comb filters. A first comb filter. A contains a single 1H delay line for canceling adjacent-track crosstalk in the automatic phase control l...
07/16/1991
5016111Television signal recording/reproducing apparatus of color-under recording type
A television signal recording/reproducing apparatus of the color-under recording type wherein an input composite video signal is separated into a luminance signal and a color signal. For the separated luminance signal, calculation of the interframe signal...
05/14/1991
5003413Tracking control circuit of helical scanning magnetic tape apparatus
In a digital audio magnetic tape reproducing apparatus of herical scanning using two magnetic heads, a first head reproduces a pilot signal of its own track and two pilot signals of both neighboring tracks of its own track by affection of crosstalk, then ...
03/26/1991
4998172Secondary beat signal cancel circuit
A magnetic reproducing apparatus is provided with an improved secondary beat signal cancel circuit for reducing a secondary beat signal of a low-frequency converted chroma signal leaked into a reproduced luminance signal without deteriorating vertical res...
03/05/1991
4991026Chrominance signal reproducing apparatus for video tape recorder
A magnetic recording and reproducing apparatus for eliminating the crosstalk component from an adjacent track of a tape of a VTR and obtaining a high picture quality. Chrominance signals in the base band which are produced by a low frequency conversion ch...
02/05/1991
4969033Circuit for removing crosstalk components in a carrier chrominance signal
In a circuit for removing crosstalk components in a carrier chrominance signal, there are provided a first delay circuit (20), an inverter (21), a first higher-voltage detecting circuit (18), a second delay circuit (22), a second higher-voltage detecting ...
11/06/1990
4930005Circuit for removing crosstalk components in a carrier chrominance signal
In a circuit for removing crosstalk components in a carrier chrominance signal, there are provided a first delay circuit (20), an inverter (21), a first higher-voltage detecting circuit (18), a second delay circuit (22), a second higher-voltage detecting ...
05/29/1990
4881134Comb filter for the rejection of intertrack chromonance crosstalk
In known color-under video recorders intertrack chrominance cross talk is eliminated by comb-filtering of the back-converted chrominance signal. However, if the delay circuit needed in the comb filter is a CCD delay line this will give rise to problems bo...
11/14/1989
4825300Magnetic video recording system and method with horizontal synchronization interval alignment
A magnetic video recorder/reproducer includes a modulation circuit (2) for modulating video signals to be of high frequencies. The modulated video signals are supplied to a 0.25H delay circuit (4) and a 0.5H delay circuit (6) by selection switches (31, 32...
04/25/1989
4812926Automatic tracking device for VCR with capstan motor controlled by color signal
The present invention relates to an automatic tracking device for VCR designed to achieve an automatic tracking by making compensation for phase of capstan motor depending on the relative magnitudes of real color signal and cross talk signal among reprodu...
03/14/1989
4811117Video tape recorder for recording and reproducing two-channel component signals of a video signal on a magnetic tape using two pair of heads and alternately delayed signals
A video tape recorder for recording two-channel component signals of a video signal on a magnetic tape and for reproducing the recorded signals includes a recording signal processing system for processing the two-channel component signals into first and s...
03/07/1989
4809085Recording and reproducing apparatus for reducing cross-talk in color television signal
A recording and reproducing apparatus comprising a comb filter which is used both at recording and at reproducing and which is a recursive type filter using a phase advance circuit. The phase of the chrominance signal is advanced in phase by a time corres...
02/28/1989
4807050Video signal recording/reproducing apparatus
A video signal recording/reproducing apparatus has, in a recording signal processing section, a first switching circuit for exchanging 2-channel component signals at intervals of nH (n: any integer, H: horizontal scanning period) to obtain two combined si...
02/21/1989
4807049C-type comb filter with negative feedback
A C-type comb filter that employs a first charge-coupled device (CCD) delay circuit and a second CCD delay circuit having an intermediate tap, whereby a delayed signal from the intermediate tap is fed back to be subtracted from the input side of the C-typ...
02/21/1989
4752833Circuit arrangement for a video recorder
A circuit arrangement for a video recorder comprises a modulator (5) for modulating a chrominance signal from a first onto a second carrier wave by means of a third carrier wave. In order to generate the third carrier wave a first mixer (39) is coupled to...
06/21/1988
4745492Video signal digital processing system using lower sampling frequency for chroma signal data decimation
A video signal digital processing system comprises an A/D converter for converting an input analog video signal employing the NTSC or PAL system into a digital video signal, a first frequency converter for generating a signal sampled at a frequency f...
05/17/1988
4737862Video signal record/playback device
In a record mode, a record video signal applied to an input terminal is separated into a luminance signal and a color signal by a comb filter made up of a 1H delay line, an adder circuit and a subtraction circuit. In a playback mode, the reproduced lumina...
04/12/1988
4731674Color video signal processing apparatus for crosstalk elimination
Signal processing apparatus for processing a color video signal formed of a luminance signal and a color carrier signal reproduced from a magnetic tape, in which the signals include respective crosstalk components produced from the tracks adjacent the tra...
03/15/1988
4701787Selectively enabled image signal processing circuit using recursive filtering
A switch circuit is provided in an operation circuit of an image signal processing circuit device in which a chroma signal reproduced from a VTR is passed through a recursive comb type filter to derive a vertical high frequency component therefrom. A low ...
10/20/1987
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