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| Number | Title | Issue Date |
| 7193656 | Line address computer for providing coefficients to a chroma filter Presented herein is a line address computer for providing chroma coefficients to a chroma filter. At each horizontal synchronization pulse, the line address computer provides a set of interpolation weights to a chroma filter. The chroma filter uses the provided set ... | 03/20/2007 |
| 6976044 | Narrowband interference canceller for wideband communication systems A method and apparatus for adaptively removing interference from a signal. In one embodiment, the invention comprises an infinite impulse response (IIR) notch filter configured to receive a wideband signal and provide a filtered output signal, and a controller coupl... | 12/13/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6525781 | SECAM video standard chroma modulation circuit An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to present a first signal and a second signal in response to (i) a select signal, (ii) a first difference signal and (iii) a second difference signal. The se... | 02/25/2003 |
| 6320622 | De-emphasis filter with integrated determination of achromatic values A digital de-emphasis filter for a SECAM decoder for converting a sequence of input image data into filtered image data includes at least one recursion register for storing an auxiliary value that is obtained using an input image data value. An arithmetic... | 11/20/2001 |
| 6160588 | Adaptive anti-crosscolor notch filter for SECAM encoder A luminance notch filter for preventing color crosstalk adaptively attenuates a SECAM luminance signal depending on the strength of the luminance signal using digital filtering techniques. The adaptive luminance notch filter includes a bandpass filter cen... | 12/12/2000 |
| 5305112 | Video signal recording/reproducing system for recording and reproducing video signals in high quality picture television system A video signal recording and reproducing system enables recording and reproducing of a video signal with high quality. The system includes a recording system for recording the video signal on a record medium by means of a median filter and a reproducing s... | 04/19/1994 |
| 5303060 | Apparatus for recording and/or reproducing HDTV signals An HDTV signal (dot density: 2N dots/line) is converted into a luminance signal and a line sequential color signal, and the resulting signals are both subjected to vertical interpolation and vertical filtering to derive a sequential scanning luminance sig... | 04/12/1994 |
| 5245415 | Chroma encoder A chroma encoder inputs an analog color-difference signal and outputs an appropriate chroma signal, and includes an A/D converter for converting the analog color-difference signal into a digital color-difference signal, and a calculator for sampling the p... | 09/14/1993 |
| 5235411 | Signal processing apparatus with improved alignment switching between color difference signals A signal generator 51 supplies a switching signal to a color difference signal output switch 44 in response to a line index signal LI and/or a horizontal synchronizing signal HD, thus avoiding the outputting of a signal obtained by adding two color differ... | 08/10/1993 |
| 5227867 | Apparatus for line-alternating interpolation of chroma signals An apparatus for line-alternating interpolation of chroma signals in a MUSE decoder for a high definition (HD) television can simultaneously transmit color difference signals such that a color difference signal of an untransmitted scanning line is restore... | 07/13/1993 |
| 5194938 | SECAM decoder with phase-locked loop demodulators A SECAM decoder comprises an input receiving a chrominance subcarrier (SP); first and second outputs delivering respectively the decoded blue (B2) and red (R2) signals; a first PLL phase demodulator (30) receiving the subcarrier (SP), operative only durin... | 03/16/1993 |
| 5155584 | Image recording reproducing apparatus switching image sensor signals or reproduced signals to an A/D converter An apparatus for recording/reproducing an image, includes a unit for switching between an image signal read from an image sensor in units of pixels and a reproduction signal from a recording medium, an A/D converter for converting the image signal from th... | 10/13/1992 |
| 5081521 | NTSC color television system with improved chroma bandwidth and chroma ringing reduction A chroma modulation method for extending the bandwidth of baseband plural chroma components of an NTSC format quadrature modulated chroma subcarrier color television signal, such as I and Q components, with reduced susceptibility to ringing and with compa... | 01/14/1992 |
| 5010391 | Digital video signal processing device In a digital video signal processing device, a digital filter two-dimensionally limits the bandwidth of a digital video signal which is obtained by time-base multiplexing a digital luminance signal with a digital chrominance signal for each horizontal sca... | 04/23/1991 |
| 4942457 | Circuit arrangement for processing video components A video signal processor as for generating a picture-in-picture signal, generates respective analog luminance components and first and second analog chrominance components. In order to reduce the system hardware and processing speed, multiplexing circuitr... | 07/17/1990 |
| 4939572 | Video signal processing apparatus A first video signal processing apparatus for processing a video signal including first and second color difference signals transmitted line-sequentially for outputting simultaneously two fundamental color difference signal, used in SECAM system comprises... | 07/03/1990 |
| 4888642 | Video signal processor A video signal processing circuitry which comprises a first arithmetic circuit adapted to receive a line sequential signal, a first 1H delay circuit for delaying an output from the first arithmetic circuit for a length of time equal to one horizontal peri... | 12/19/1989 |
| 4885642 | Method and apparatus for digitally recording and reproducing a color video signal for a SECAM system In digitally recording a color video signal for a SECAM system, a horizontal blanking interval including a horizontal synchronizing signal and a non-modulated carrier is not recorded as in the case of a color video signal for a NTSC or PAL system. In a re... | 12/05/1989 |
| 4796085 | Device for interpolating missing color-difference signal by averaging line-sequential color-difference signals An apparatus interpolates color-difference line-sequential signals appearing alternately in a video signal together with a luminance signal. The video signal is received by an input circuit and then held temporarily and on a horizontal scanning line basis... | 01/03/1989 |
| 4750051 | Color difference line sequential circuit in a magnetic recording system A color difference line sequential circuit for use in a magnetic recording apparatus such as an electronic still camera or the like in which an image signal is frequency modulated and is then recorded in a magnetic recording medium. The color difference l... | 06/07/1988 |
| 4739391 | Video signal processing apparatus for converting line sequential signals into line simultaneous signals A video signal processing apparatus wherein the phase of a periodic signal the period of which relates to the horizontal scanning period of a video signal including line sequential signals with a discontinuous point at every predetermined period, is shift... | 04/19/1988 |
| 4730209 | Circuit for converting a colour television time division multiplex signal into simultaneous signals A color television Y/U/V luminance-chrominance multiplex signal with signals which may or may not be compressed in time comprises for a television line the associated luminance information Y and half the chrominance information U or V. As a result the cir... | 03/08/1988 |
| 4697206 | Method and apparatus for enhancing vertical chrominance resolution Chrominance component signals of two different types are produced such that the chrominance signals alternate within a field and between adjacent fields in order to provide an improved amount of information from which to enhance the vertical chrominance r... | 09/29/1987 |
| 4695899 | Recording and reproducing system employing balanced modulation for color video signal A color video signal recording system comprises means for producing a quadrature two-phase balanced-modulated color signal by subjecting a subcarrier to quadrature two-phase balanced modulation by two color signals, means for producing a demodulation-purp... | 09/22/1987 |
| 4672424 | Progressively scanned television system with reduced chrominance bandwidth A high definition television signal for use in a studio production facility is formed by scanning an image in progressive rather than interlaced fashion to form luminance and first and second color-difference signals and by reducing the resolution of the ... | 06/09/1987 |
| 4651195 | Monochrome-compatible color slow scan television system A method and system for translating between three complementary color component slow scan video signals and a composite color slow scan video signal containing a luminance information signal within a visible line interval of each slow scan video signal li... | 03/17/1987 |
| 4641201 | Color video signal transmitting apparatus A color video signal transmitting apparatus comprises first and second input terminals supplied in parallel with a time base compressed luminance signal and a first time base compressed line-sequential color difference signal which are obtained from one o... | 02/03/1987 |
| 4635098 | Method and system for improved reconstruction of video images in line sequential chroma format A method and system for reconstruction of chroma component segments in a line sequential chroma format television system. Filtering of a received line sequential chroma signal is employed to reconstruct missing chroma components and to attenuate phantom f... | 01/06/1987 |
| 4630131 | Recording signal generation system for color video signal A recording signal generation system for a color video signal which is suitable for high density recording in a magnetic recording and playback apparatus. In each horizontal scan period which includes an effective horizontal scan period and a horizontal b... | 12/16/1986 |
| 4623914 | Discrimination circuit for a line sequential signal An identification signal is produced on the basis of the difference between the potentials in the adjacent horizontal blanking periods of a demodulated line sequential color signal. Therefore, a delay, if, of the discrimination timing can be substantially... | 11/18/1986 |
| 4613893 | Method of producing a time-multiplex color television signal Digitalized luminance and color difference signals, the former sampled at twice the sampling frequency of the latter, are interleaved into two data streams (k, m) in each of which a sample of the luminance signal separates samples of different color telev... | 09/23/1986 |
| 4574301 | SECAM Color identifying circuit The invention relates to color television receivers. Bursts which are transmitted during the line and field retrace-periods and whose frequencies change from one line to the other between 4.25 MHz (blue, luminance) and 4.40625 MHz (red-luminance) are used to o... | 03/04/1986 |
| 4533960 | System for encoding and decoding video signals A system is described which makes use of the fact that in a raster scanned television system a high degree of correlation exists both in the luminance and in the chrominance signals of a pair of adjacent lines. Because of this correlation, the difference ... | 08/06/1985 |
| 4516151 | Color slow scan video signal translation A method and system for translating between three complementary color component slow scan video signals and a composite color slow scan video signal containing a frequency modulated (FM) luminance information signal within a first frequency range of the s... | 05/07/1985 |
| 4358787 | Digital process for controlling the correct reproduction of a composite television signal and a device for implementing said process A digital process for controlling the correct reproduction of a composite television signal and in particular of a composite color television signal comprising sequential-type chrominance signals, transmitted or recorded on an information-carrying medium ... | 11/09/1982 |
| 4357623 | SECAM Identification system Color TV receiver subject to reception of SECAM signals incorporates dual-mode identification system for identifying and correcting an incorrect mode of line-by-line switching in SECAM demodulation apparatus. In one (horizontal) mode of operation, identif... | 11/02/1982 |
| 4335393 | Method and system using sequentially encoded color and luminance processing of video type signals to improve picture quality Conventional composite color video signals are re-formatted into a compressed serial format on a line-by-line basis, by sampling the luminance and chrominance components at a predetermined sampling rate and serially arranging the sampled components on a l... | 06/15/1982 |
| 4264918 | Automatic chroma gain control circuits useful in secam coders A method and circuit for controlling the gain of a SECAM camera inserts a test signal into a channel. The resulting deviation is measured and used to control the gain of the channel.... | 04/28/1981 |
| 4191965 | Apparatus and method for testing color sequencing of secam color television signals An apparatus and method for testing color sequencing of SECAM color television signals whereby any reversed color sequences will be immediately identifiable is provided. Specifically, the color sequence of SECAM picture monitor determined by white lead-in... | 03/04/1980 |
