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| Number | Title | Issue Date |
| 7340101 | Device and method for compressing and decompressing data for graphics display A data compressing and decompressing device is adapted to be used with an image pickup device and a frame buffer. The data compressing and decompressing device includes a first data register in communication with the image pickup device, a first encoder in communica... | 03/04/2008 |
| 7324024 | High frequency compensator and reproducing device A high frequency compensator configured to compensate high frequency component of a digital audio signal comprising a down sampler configured to perform ½ down-sampling for the digital audio signal. An up sampler is configured to perform double up-sampling for an o... | 01/29/2008 |
| 7233703 | Computation-reduced IDCT method for video coding Reduced complexity inverse discrete cosine transform (IDCT) masks and a method for reducing the number of IDCT calculations in video decoding are provided. The method comprises: accepting an n×m matrix of DCT coefficients; performing (n−y) horizontal IDCT operati... | 06/19/2007 |
| 7231092 | Image compression/decompression system employing pixel thinning-out and interpolation scheme An improved image thinning-out processing scheme includes processes of performing pixel thinning-out operation and compressing image data; and determining a position of pixel to be thinned out along a first direction depending on the position thereof along a second ... | 06/12/2007 |
| 7221793 | Systems and methods for providing spatially-varied demosaicing Disclosed are systems and methods for providing spatially-varied demosaicing. In one embodiment, a system and method pertain to collecting color information sensed by image sensor pixels, and estimating color information as to a pixel under consideration that is not... | 05/22/2007 |
| 7136417 | Chroma conversion optimization A system for processing color information in a video signal is provided. The system includes a memory with logic, and a processor configured with the logic to receive a compressed video stream that includes a frame picture having chroma samples and luma samples, whe... | 11/14/2006 |
| 7079578 | Partial bitstream transcoder system for compressed digital video bitstreams A transcoder system for compressed digital video bitstreams comprising the three frame types: I-frames, P-frames and B-frames, is disclosed. The system includes a picture reader decoder to ascertain and select the type, size or estimated quality of each frame, or th... | 07/18/2006 |
| 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 |
| 6760379 | Cascading of up conversion and down conversion In digital video, 3:4 down conversion and 4:3 down conversion are transparently cascaded. The up conversion filter is: Sup(n)=ΣSinput(k).g(3n−4k) and the down conversion filter is: Sdown(n)=ΣSup(k).h(4n−3k). The pair... | 07/06/2004 |
| 6246827 | Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filterin... | 06/12/2001 |
| 5699470 | Apparatus for recording and reproducing video signals with recording of frequency converted subsampled chrominance signals In an apparatus for processing an input video signal that includes a chrominance signal and a luminance signal, the luminance signal is frequency-modulated and the chrominance signal is subsampled, preferably by field-offset subsampling, whereupon, the su... | 12/16/1997 |
| 5646686 | Methods and apparatus for reducing drift in video decoders A video decoder capable of downsampling full resolution images on a block by block basis regardless of the downsampling rate is disclosed. When the applied downsampling rate does not divide evenly into the number of pixel values included in a block in the... | 07/08/1997 |
| 5561463 | Video signal coding using sub-band coding and phase-segregated coding techniques A composite video signal is formed in which high luminance frequencies are modulated so that they occupy frequencies above the chrominance band. A sub-band coder is used to split the luminance frequency band into high and low frequencies at the coder, and... | 10/01/1996 |
| 5523850 | Picture signal recording device having adaptive processing circuit for adding color signal and sub-sampled color signal in response to motion signal A picture signal recording device for recording color video signals having a color signal detection circuit detects the quantity of motion of chroma signals from an inter-frame difference between a color difference signal from a chroma recording processin... | 06/04/1996 |
| 5517245 | High efficiency encoding and/or decoding apparatus A high efficiency encoding device for compressing the input information by temporal/spatial sampling transmits the input information supplied at an input terminal 10 to a thinning sub-sampling unit 11 and to a normal equation generating unit 12a in a mode... | 05/14/1996 |
| 5450214 | Video signal processing device A video signal processing device is designed to input selectively a first video signal or a sub-sampled second video signal. These inputs are input to a common filter. The output of the filter is output after being sub-sampled, when the first video signal... | 09/12/1995 |
| 5426465 | Television systems To increase the horizontal bandwith of the Weston PAL chrominance signal spectrum folding techniques are used. Spectral components with high horizontal frequency and low vertical and/or temporal frequency are carried as components with low horizontal freq... | 06/20/1995 |
| 5335071 | Apparatus for enhancing image quality of a videotape recorder using motion adaptive method The present invention relates to a motion adaptive picture image signal reproduction circuit which appropriately unfolds the brightness signal of a still picture image signal foldly recorded on a video tape, and outputs the brightness signal of a picture ... | 08/02/1994 |
| 5185655 | Method and apparatus for encoding full color video data signals and protocol for encoding same Method and apparatus for encoding full color video data signals and a protocol for encoding the same in a storage medium. Each pixel of a full color video image is converted into a single 8 bit luminance and multiple 8 bit chrominance components. The 8 bi... | 02/09/1993 |
| 5136379 | Video signal processing device capable of vertical blocking A video signal processing device has a sampling unit for sampling a luminance signal and two types of color difference signals respectively contained in a video signal. The sampling unit being samples the luminance and the color difference signals such th... | 08/04/1992 |
| 5047838 | Adaptive comb filter A subnyquist sampling filter which results in less loss of picture resolution. An adaptive prefilter perform low-pass filter processing on a series of picture signals sampled in the form of a square lattice in a direction in which it has been determined t... | 09/10/1991 |
| 5045926 | Television image display apparatus In a television image display apparatus, one field of an input video signal is divided into a plurality of areas in each of which image information is sampled, and an arithmetic processor provides a video control signal on the basis of preset adjusting da... | 09/03/1991 |
| 5040064 | Method of processing sampled signal valves produced by a color imaging device Blurring along edges between regions of different color characteristics in interpolated color images is avoided by a signal processing technique that segments the fully sampled channel into a plurality of contiguous image regions of respectively different... | 08/13/1991 |
| 5032910 | Mechanism for producing interpolated color values for a sampled color image signal using a linear equation technique Color fringing of edges between regions of different color in an interpolated image is effectively avoided by a signal processing technique that infers the existence of a color edge in response to prescribed changes in image characteristics at sample poin... | 07/16/1991 |
| 4884136 | Motion detection circuit The motion detection circuit is so constructed that an interframe difference signal is passed through a horizontal direction LPF and a vertical direction LPF in cascade connection, and the interframe difference signal thus obtained is divided by the value... | 11/28/1989 |
| 4760446 | Method and apparatus for detecting the motion of image in a television signal A method and apparatus for detecting the motion of image in a television signal is intended for a decoder of a multiple subsampling transmission signal without an interframe aliased portion in a lower frequency region. In the method and apparatus for dete... | 07/26/1988 |
| 4405936 | Method of and arrangement for digitizing a color video signal In order to obtain a reduction of the bit rate when digitizing a color video signal using a picture transform, the color video signal is sampled with a frequency which is twice the color auxiliary carrier frequency. The video signal samples thus obtained ... | 09/20/1983 |
| 4322739 | Processing of N.T.S.C. color television signals Digital sampling of the luminance component of an N.T.S.C. color television signal is achieved by sampling with a mean frequency of twice the color subcarrier frequency to produce a sub-Nyquist sampled luminance signal. The sampling phase is changed betwe... | 03/30/1982 |
| 4204227 | Television picture compressor A television picture compressor for use with a video synchronizer provides means for sampling the video and providing a predetermined number of samples of video per line and lines per field. The compression of the television picture is provided by means f... | 05/20/1980 |
| 4115811 | Data slicing apparatus and method A data slicer including detector means connected to a signal input for detecting the presence of data clock pulses on an incoming signal. Generator means are connected to the detector means for generating a sampling pulse during the time that the presence... | 09/19/1978 |
