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| Number | Title | Issue Date |
| 5901178 | Post-compression hidden data transport for video Auxiliary data is carried substantially imperceptibly with video transform data in combined transform samples according to a visibility threshold. The auxiliary data provides a capability for a copy protect scheme or verification of television viewing act... | 05/04/1999 |
| 5886741 | Method and apparatus for improved video coding using a zero block predictor module A video encoder optimized so as to be implemented using general purpose DSPs or as software executable on a general purpose microprocessor includes a modified motion detector module (50) which classifies blocks in the currently processing image as moving ... | 03/23/1999 |
| 5880785 | Moving picture coding apparatus with total data amount control A coding apparatus for coding a video signal by way of total data amount control. The video signal is coded by high efficient predictive coding to produce first encoded data. A data amount of the first encoded data is counted and converted to a target dat... | 03/09/1999 |
| 5880784 | Method and apparatus for adaptively switching on and off advanced prediction mode in an H.263 video coder A feedback mechanism for adaptively enabling and disabling an advanced prediction mode for video data processing is disclosed. A quantization parameter (QP) threshold is set and a QP mean for an error frame is determined. The advanced prediction mode is e... | 03/09/1999 |
| 5831688 | Image coded data re-encoding apparatus A image coded data re-encoding apparatus for regenerated image coded data for transmission or storing by re-encoding decoded image data according to the present invention comprises an image decoder for decoding image coded data, an object for re-encoding,... | 11/03/1998 |
| 5828848 | Method and apparatus for compression and decompression of video data streams A video image data field to be compression-encoded is divided into rectangular blocks. Each of the rectangular blocks is compared with a corresponding block of a reference image to generate comparison data. The block of the image to be encoded is selected... | 10/27/1998 |
| 5822004 | Adaptive quantification based on actual and predicted image data amounts A procedure for quantification of coefficients in a variable data rate image compression system, in the form of blocks and macroblocks, the system including circuitry for transformation of blocks of pixels into blocks of coefficients, circuitry for quanti... | 10/13/1998 |
| 5815209 | Encoding method, an encoding apparatus, a decoding method and a decoding apparatus for a moving picture A method for encoding a picture based on an intra-picture coding and an inter-picture prediction coding having an absolute value of a maximum range of motion compensation between continuous pictures in terms of time being H pixels (H: a positive integer) ... | 09/29/1998 |
| 5805222 | Video coding apparatus A video coding apparatus for performing predictive coding of digital video input signals. The apparatus employs a resolution selection controller that selects picture resolution to be used in coding of a source picture of a current frame, according to cod... | 09/08/1998 |
| 5801776 | Image processing system The present invention provides an image decoding and reconstruction system for successively reading out and decoding compression video data constituting one screen page and reconstructing an image with a memory of a small capacity. The system of the inven... | 09/01/1998 |
| 5793985 | Method and apparatus for block-based motion estimation This disclosure provides a method of block-based motion estimation used in video compression. The compression process, derives change data for a new frame of data (with respect to a reference frame) by first dividing the frame structure into data tiles (o... | 08/11/1998 |
| 5793314 | Method and apparatus for bound-based adaptive entropy encoding/decoding The present invention provides an apparatus and method for adaptive entropy encoding/decoding in a multimedia compression system. For encoding, the steps include: A) parsing a predetermined number of quantized transform coefficients into a plurality of co... | 08/11/1998 |
| 5790706 | Method and apparatus for scanning of transform coefficients The present invention provides an apparatus and method for, in at least one of: encoding and decoding, scanning transform coefficients in an image/video encoded/decoder. In encoding, the steps include: A) segregating a predetermined number of quantized tr... | 08/04/1998 |
| 5786857 | Image processing system An image-processing system in which harmful noises of image compression are effectively removed. The image processing system includes a transformation device for receiving m pixels×n lines of image information from an input and converting the image infor... | 07/28/1998 |
| 5774677 | Dual interleaved block motion compensation Input image data is stored in an interleaved format, in which data from two or more blocks are stored in an alternating fashion. Motion compensation is performed on the interleaved data by applying motion vectors to the appropriate data to generate differ... | 06/30/1998 |
| 5767913 | Mapping system for producing event identifying codes A mapping system for producing event identifying codes includes a plurality of video-audio-data (VAD) marker channels representative of a method for coding and/or encoding signals such as video and non-video signals. At least one of the VAD marker channel... | 06/16/1998 |
| 5767909 | Apparatus for encoding a digital video signal using an adaptive scanning technique An apparatus for encoding a digital video signal to provide a digitally coded video signal comprises a source coder for generating a set of quantized transform coefficients corresponding to each of the coding blocks, a scanning order determination block f... | 06/16/1998 |
| 5764296 | Resolution-variable adaptive picture compression A resolution-variable adaptive picture compression method and the apparatus therefor varies the resolution of the currently compressed picture while adjusting its frame structure which is compressed according to the picture's condition, to thereby enhance... | 06/09/1998 |
| 5754696 | Apparatus for compression-coding image data and method of the same based on quantification and frequency transform coefficient amplitude reduction An image compression-coding device includes a level conversion circuit for adaptively reducing the amplitude of the quantification coefficient data based on statistical characteristics of the quantification coefficient data. The device further includes a ... | 05/19/1998 |
| 5751359 | Method for quantizing compressed video signals A method for encoding a 10-bit based picture using a circuitry or devices inherently designed for handing an 8-bit based picture. The 10-bit based input picture data is motion-compensated with 8 bits in a motion compensation circuit. From the motion-compe... | 05/12/1998 |
| 5748244 | Adaptive runlength coding based on zero and non-zero subblocks A method, for use in a video signal encoding system, for processing a block of quantized transform coefficients first divides the block of quantized transform coefficients into a predetermined number of subblocks and detects one or more non-zero subblocks... | 05/05/1998 |
| 5748793 | Quick image processor of reduced circuit scale with high image quality and high efficiency A quick image processor of reduced circuit scale for carrying out compression and expansion of image data, including a quantization-inverse quantization device which executes a quantization of the image data using quantization steps corresponding to frequ... | 05/05/1998 |
| 5734755 | JPEG/MPEG decoder-compatible optimized thresholding for image and video signal compression For encoding signals corresponding to still images or video sequences, respective standards known as JPEG and MPEG have been proposed. These standards are based on digital cosine transform (DCT) compression. For economy of transmission, DCT coefficients m... | 03/31/1998 |
| 5729294 | Motion video compression system with novel adaptive quantization A system and method for coding a digitized picture is described. The picture is divided into a plurality of regions and then each region is further divided into a plurality of subregions. Linear combinations of pixels in each subregion are then computed. ... | 03/17/1998 |
| 5729633 | Picture data compression coding device and method thereof A device for coding picture data by compression, and a method thereof. By preprocessing, the device calculates a picture activity of one frame of picture data. A quantizing table circuit selects a particular quantizing step matching the picture activity a... | 03/17/1998 |
| 5721589 | Moving picture coding apparatus which calculates an optimum quantization step size using the relationship between the quantization step size and a generated bit amount A moving picture coding apparatus wherein the amount of operation for calculation of an quantization step size to be used for coding of a picture signal by a coding section is reduced includes a bit amount estimation section estimates an amount of bits to... | 02/24/1998 |
| 5715004 | Transformation coding apparatus A transformation coding apparatus for transforming blocks of data corresponding to a boundary of an object. The apparatus includes a transformer for transforming an input block and producing transformation coefficients, a transformation coefficient select... | 02/03/1998 |
| 5714950 | System for variable-length-coding and variable-length-decoding digitaldata A system for coding and decoding digital data divided into segments which includes coding the segment data into symbols according to various scanning patterns, accumulating the various lengths of variable-length-coded data, selecting a scanning pattern co... | 02/03/1998 |
| 5703649 | Digital video signal coding apparatus and method, and coded video signal decoding apparatus and method In a digital video coding apparatus, the image compression rate can be improved and the worsening of image quality can be decreased. As well as conducting the motion compensated prediction, the predictive residue at this point is obtained, and in addition... | 12/30/1997 |
| 5703647 | Apparatus for encoding/decoding a video signal A video signal encoding apparatus performs the quantization based on a predetermined quantizer scale, so the picture quality of an encoded video signal can be maintained. The video signal encoding apparatus sequentially stores an input video frame signals... | 12/30/1997 |
| 5703646 | Picture encoding method, picture encoding apparatus and picture recording medium This invention employs a scheme to allow an input video signal to undergo encoding, e.g., predictive encoding, DCT processing, quantization at fixed quantization step size and variable length encoding to generate first encoded data to determine (calculate... | 12/30/1997 |
| 5699458 | Efficient browsing of encoded images A computer-implemented method and system for browsing encoded images. According to a preferred embodiment, at least one image is encoded with an encoding system to provide at least one encoded image. The encoding includes transforming images of the at lea... | 12/16/1997 |
| 5691777 | Method and apparatus for simultaneous compression of video, audio and data signals A program delivery system using a compression apparatus capable of compressing incoming video and non-video signals, such as audio and data signals. The system includes a frequency modulator which modulates the incoming audio, data or other non-video sign... | 11/25/1997 |
| 5691769 | Apparatus for encoding a contour of an object A contour encoding apparatus determines vertex points on the previous contour of the previous frame based on a polygonal approximation. A set of first approximation errors is calculated at a predetermined number of sample points on each first line segment... | 11/25/1997 |
| 5682152 | Data compression using adaptive bit allocation and hybrid lossless entropy encoding A method and apparatus for adaptive bit allocation and hybrid lossless entropy encoding in a lossy compression system. The invention includes three components: (1) a transform stage to decorrelate image data into a baseband and multiple subbands, (2) a qu... | 10/28/1997 |
| 5666161 | Method and apparatus for creating less amount of compressd image data from compressed still image data and system for transmitting compressed image data through transmission line Compressed image data of a desired picture is read out from a memory having compressed image data of a sequential format stored therein and then subjected to an examination with respect to a plurality of frequency components of the read-out compressed ima... | 09/09/1997 |
| 5640420 | Variable length coder using two VLC tables A digital video signal encoder for coding a block of a digital video signal first converts the block of the digital video signal into a set of quantized transform coefficients having a low and a high frequency zones and scans the set of quantized transfor... | 06/17/1997 |
| 5625715 | Method and apparatus for encoding pictures including a moving object A method of encoding a sequence of images including a moving object, comprises forming an initial template, extracting a mask outlining the object, dividing the template into a plurality (for example sixteen) sub-templates, searching the next frame to fin... | 04/29/1997 |
| 5621465 | Color image encoder A color image encoder comprises a block converter for dividing a digital color video signal, which is composed of a Y signal and R-Y and B-Y signals, into blocks for the respective signals; an orthogonal transformer for orthogonally transforming the digit... | 04/15/1997 |
| 5617142 | Method and apparatus for changing the compression level of a compressed digital signal A method and apparatus are provided for changing the compression level of digital information, such as digital video information. After having been compressed by a first compression scheme that provides quantized transform coefficients, the digital inform... | 04/01/1997 |
