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Document Title |
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7587131 |
Audio clocking in video applications
A method of operating an electronic video device such as a DVD player, wherein video clock signals and audio clock signals are derived from a system clock signal using two phase-lock loops, and...
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7542653 |
Passive fiber organizer for mesh network node interconnections
A mesh optical network node has switch cards which carry active components, such as wavelength routers to switch the paths of optical signals through the node and a fiber organizer handles the...
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7391472 |
System and method for adaptive color burst phase correction
We describe and claim an adaptive color burst phase correction system and method. The adaptive color burst phase correction system includes a signal detector to extract a color burst from a video...
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7379653 |
Audio-video synchronization for digital systems
The audio-video synchronization process ensures continuity of displayed AV data. To initialize the process, a transport processor determines whether an occupancy criterion of a buffer storing...
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6449421 |
Video signal processor having a reduced number of oscillation units
A video signal processor which includes a reference signal generating circuit provided with at least an oscillation circuit for generating a reference signal corresponding to a burst signal and a...
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6347179 |
Video signal processor
A video signal processor which includes a reference signal generating circuit provided with at least an oscillation circuit for generating a reference signal corresponding to a burst signal and a...
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6330391 |
VTR signal processing circuit
In a VTR signal processing circuit, a first reproduced color under signal and a second reproduced color under signal obtained by delaying by one or two horizontal period in synchronism with a...
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5987209 |
Video signal receiver in which a reference signal is shared by a PLL circuit which sets the output frequency of a local RF-IF oscillator and by the chrominance signal generator
A video signal processor which includes a reference signal generating circuit provided with at least an oscillation circuit for generating a reference signal corresponding to a burst signal and a...
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5636312 |
Video image mixing apparatus
A video image mixing apparatus which can prevent a fluctuation of a mixed video image by a mixed video signal in the case where a playback video signal obtained by playing a recording medium in a...
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5621537 |
Color signal processing circuit in color VTR
In a home VTR, a color signal processing circuit is capable of reproducing a color signal recorded as a lower converted color signal and preventing color unevenness which necessarily creates during...
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5608531 |
Video signal recording apparatus
A video signal recording apparatus in which a chroma signal contained in a video signal is down-converted and then recorded on a predetermined recording medium comprises a sampling circuit for...
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5596417 |
Color signal processor for inverting R-Y axis of chrominance signal
A color signal processor in which a color subcarrier is multiplied with either a signal harmonic or a phase shifted harmonic of a low frequency chrominance signal, depending on whether the R-Y axis...
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5568276 |
Image signal recording and reproducing system
In an image signal recording and reproducing system, a phase reference signal, the phase of which is synchronized with the phase of an image signal, is added to the image signal in a recording mode...
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5323242 |
Carrier signal generating circuit in video signal recording/reproducing apparatus
In a video signal apparatus, a carrier signal generating circuit includes a VCO for generating a signal having a frequency at least twice that of a carrier signal necessary for conversion to a...
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5247350 |
Method and apparatus for testing video
The chroma circuits of a VCR are tested by replacing the video signal from the video heads of the VCR with a composite signal from a test pattern signal developed by a test instrument, which...
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5206726 |
Time base corrector for eliminating time base fluctuations in a composite video signal
A time base corrector of composite video signal using memory. In the back porch and front porch of a composite video signal, offset voltages having polarities opposite to each other and a level...
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5194961 |
Apparatus for locking a reproduced color video signal to a reference color frame signal
A color video signal reproducing apparatus for reproducing a color video signal and a control signal for indicating a color frame of the color video signal from a record medium includes a generator...
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5164838 |
Time base error signal generating apparatus
A time base error signal generating apparatus which outputs a phase difference signal representing a phase difference between a horizontal sync signal and a reference signal as a time base error...
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5081537 |
Color image information inserting circuit for video signal recording and reproducing system
A circuit for inserting color information into a video signal during either recording or reproduction. The circuit extracts a burst signal from a chroma signal input and generates a first color...
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5043966 |
Device for deriving a sampling rate
The device includes a synchronizing-signal separator (20), a phase-locked loop (23), having a phase comparator (25), a voltage-controlled oscillator (28) and a frequency divider (31). The device...
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4987491 |
Jitter compensation circuit for processing jitter components of reproduced video signal
A reproduced video signal of a VTR is applied to a jitter compensation circuit (100). The applied reproduced video signal is A/D converted by a phase modulated clock and after subjected to the...
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4985781 |
Recording and/or reproducing apparatus in which a reference signal is used in a recording and/or reproducing part as well as in another part
A color video signal recording and/or reproducing apparatus wherein a reference signal which has a frequency related to a color subcarrier frequency of a carrier chrominance signal included in a...
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4954911 |
Reproducing apparatus having a mechanism for compensating time-base fluctuations
A reproducing apparatus for reproducing a recording from a record bearing medium on which a plurality of different pilot signals having different frequencies are recorded in rotation along with an...
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4772950 |
Method and apparatus for sampling and processing a video signal
A method and apparatus for sampling and processing a video signal having a time base fluctuation with sampling clock pulses produced from an oscillator which is instantaneously phase-synchronized...
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4751586 |
Rotary head tape transport servo system having high speed servo lock capability
A method and apparatus for controlling the capstan servo of a magnetic video tape recording and reproducing machine is disclosed. The invention provides almost instantaneous color framing and...
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4745493 |
Circuit arrangement for a color image recording and reproduction instrument or a color television receiver
A circuit arrangement for a color image recording and reproduction instrument(video recorder) or a color television receiver. Such devices have a phase regulation circuit in which an oscillator...
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4729025 |
Jitter correction circuit
A jitter correction circuit is a circuit for suppressing a jitter contained in a reproduced digital signal. This jitter correction circuit comprises a phase-locked loop circuit comprising a phase...
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4725895 |
Still picture reproduction system with color framing phase synchronization
In a helical-scan video tape recorder, when the color framing of a reproduced video signal when a magnetic tape is stopped and of a reference video signal when an activation command signal is sent...
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4684901 |
Automatic phase control circuit
An automatic phase control (APC) circuit with improved reliability of phase control, in which a phase of a reference signal from a crystal oscillator is alternately switched between two phases by a...
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4677459 |
Reference signal generator
A reference signal generator used to compensate for a time base error of a color video signal reproduced from a video tape recorder having a memory into which the color video signals are written in...
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4608610 |
Jitter compensation system in rotary recording medium reproducing apparatus
A jitter compensation system in a rotary recording medium reproducing apparatus having a motor for rotating a rotary recording medium, and a reproducing transducer including a reproducing element...
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4520402 |
Video apparatus with burst locked heterodyne chroma converter and residual time base error correction
A video disc player includes a phase locked loop (PLL) heterodyne converter for providing frequency translation and time base correction of the chrominance component of a composite video signal...
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4496992 |
Color video signal reproducing apparatus
A color video signal reproducing apparatus comprises a carrier chrominance signal separation circuit for separating a carrier chrominance signal from a color video signal reproduced from a...
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4477838 |
Tangential error signal generator in PAL type video disc player
A tangential error signal generator to be used in a PAL type video disc player in which a synchronous signal such as a pilot burst signal extracted from a color video signal read from a video disc...
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4415935 |
Tangential servo control signal generating device for recorded data reproducing device
A tangential servo control signal generating device for a device for reproducing recorded data from a video disc for controlling the movement of a pick-up in the tangential direction of the video...
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4395737 |
Video disc slow down processor with reverse color detector/corrector
Selected fields of a redundant field slow motion video tape reproduced video signal are stored in a memory at a given clock rate and recovered from the memory at a clock rate inversely proportional...
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4258384 |
Color video signal processing system
A PAL color video signal which is reproduced in a special mode, such as a slow, still or fast-forward or reverse mode is re-arranged in order to recover the standard signal sequence of the PAL...
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4249198 |
Phase locking system for television signals
An improved phase locking system in which an independently reproduced video signal is coded into a digitized video signal in response to a first clock pulse train, the first clock pulse train being...
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4204220 |
Dual standard video disc player
Video disc player is switchable between two operating modes: (1) for playback of records of color signals of one scanning standard (15,625 Hz. line frequency; 50 Hz. field frequency) encoded in a...
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4100567 |
Compensating time-based errors in a reproduced video signal
Apparatus for use with a video signal playback system of the type which reproduces a previously recorded composite color video signal wherein time-base errors appear in the luminance component of...
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4007486 |
Phase locking system for television signals using a digital memory technique
A phase locking system locks at least one incoming composite video signal to the synchronizing signals of a second, reference wave. The incoming signal is strobed at a rate dependent upon the...
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3996605 |
Time base corrector
A time base corrector for retiming the chrominance and luminance components of a non-phased television picture signal from a PAL video tape recorder to local reference syncs. The time base...
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3974520 |
Chrominance subcarrier phase control system
In a color video signal processing system having an automatic phase control circuit for correcting effects of angular errors, that is, time axis variations, in the chrominance subcarrier, the loop...
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3967311 |
Velocity correction for video discs
In a video disc player, apparatus for generating phase error signals between a reference signal recorded on a video disc record and an external reference are utilized to correct both velocity...
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3949415 |
Method and apparatus for coupling to a studio synchronizer a recorded color TV signal containing a frequency-translated modulated chrominance subcarrier
A color TV signal is recorded on an information carrier and includes a luminance component which occupies a predetermined luminance frequency range and a modulated chrominance subcarrier. In a...
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3934264 |
Videotape recorder and reproducer every line velocity compensator apparatus
A velocity error compensator for a multiple video head VTR in which velocity error compensation is provided for all the lines adjacent a head switch. Separate velocity error detectors are provided...
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3761604 |
RECORDING AND REPRODUCING SYSTEM IN A ROTARY MAGNETIC MEDIUM RECORDING AND REPRODUCING APPARATUS
A recording system comprises means for producing a frame pulse and a color frame pulse from an input NTSC system video signal. Track indication pulses consist of a feed pulse and a two bit feed...
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3761605 |
PHASE ERROR CORRECTION SYSTEM FOR A VIDEO TAPE RECORDER
A phase error correction system for a color video tape recorder having a plurality of recording/reproducing heads is disclosed in which the color video signal to be phase-corrected is...
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3699243 |
SIGNAL CORRECTING APPARATUS FOR CANCELLING DIFFERENTIAL PHASE ERRORS IN COLOR VIDEO TAPE RECORDINGS
An improved apparatus for correcting effects of angular errors in chrominance sideband components of a color video signal in which the chrominance sideband components, and signals indicative of the...
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3120576 |
Stabilization of magnetically recorded color television signals
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