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| Number | Title | Issue Date |
| 7382923 | Method and device for processing and decoding a coded digital signal The present invention concerns a method of processing a coded digital signal containing on the one hand a set of samples of different types obtained by coding a set of original samples representing physical quantities and on the other hand a set of information repre... | 06/03/2008 |
| 6977961 | Method and apparatus for macroblock DC and AC coefficient prediction for video coding Existing video data compression algorithms exploit the fact that the DCT coefficients in the neighbouring blocks are sometimes similar to those in the current block. This means that if the blocks contain completely different coefficients, for coding video data is di... | 12/20/2005 |
| 6970508 | Image coding and decoding using mapping coefficients corresponding to class information of pixel blocks It is possible to produce a decoded image with a high image quality from data of the lowermost hierarchy obtained during hierarchical coding operation. An image of a first hierarchy equal to an original image is successively thinned in thinning units so that an imag... | 11/29/2005 |
| 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 |
| 6750789 | Device and method for determining a coding block raster of a decoded signal In determining a coding block raster on which a decoded signal is based, a segment of the decoded signal is picked out first, said segment beginning at a certain output sampling value of the decoded signal. Said segment is then converted into a spectral representati... | 06/15/2004 |
| 6490627 | Method and apparatus that provides a scalable media delivery system The present invention provides an apparatus and method for encoding, storing, transmitting and decoding multimedia information in the form of scalable, streamed digital data. A base stream containing basic informational content and subsequent streams cont... | 12/03/2002 |
| 6215526 | Analog video tagging and encoding system An analog video tagging and encoding system is disclosed. The invention inserts an analog tag frame into the analog video stream such that the luminance (Y) values are made to approach zero, i.e., black, allowing a potential tag frame to be quickly identi... | 04/10/2001 |
| 6188798 | Apparatus and method for detecting motion vector A motion vector detection apparatus is disclosed, including: a quantizer for receiving a value of reference pixel and value of pixel to be detected, detecting their maximum values and minimum values, and determining a quantization level using the detected... | 02/13/2001 |
| 6125146 | Method and device for decoding coded digital video signals The invention relates to a video coding method and system including a quantization and coding sub-assembly (38) in which a quantization parameter is controlled by another parameter defined as being in direct relation with the dynamic range value of the da... | 09/26/2000 |
| 6118820 | Region-based information compaction as for digital images A method and concomitant apparatus for preserving the dynamic range of a relatively high dynamic range information stream, illustratively a high resolution video signal, subjected to a relatively low dynamic range encoding and/or transport process(es). Th... | 09/12/2000 |
| 5973745 | Video signal encoding method, video signal encoding apparatus, video signal transmitting method, and recording medium In a video signal encoding method and apparatus, a video signal transmitting method, and the recording medium, hierarchical encoding of image data implies problems in that a compressing efficiency is reduced as the number of hierarchical levels is increas... | 10/26/1999 |
| 5959676 | Video signal encoding method, video signal encoding apparatus, video signal transmitting method, and recording medium In a video signal encoding method and apparatus, a video signal transmitting method, and the recording medium, hierarchical encoding of image data implies problems in that a compressing efficiency is reduced as the number of hierarchical levels is increas... | 09/28/1999 |
| 5809231 | Image transmission system An image transmission system and method for transmitting an image, which has been divided into a plurality of pixel blocks, comprising a transmitting device and a receiving device. The transmitting device includes an information source encoder for dividin... | 09/15/1998 |
| 5715006 | apparatus for and method of motion compensation with boundarycorrection for moving picture A motion compensated predicting device compensates motion by segmenting a reference image to generate an initial predicted image and estimated value correcting information. The correcting information includes area segmentation information, motion informat... | 02/03/1998 |
| 5363205 | Image compressing method compressing an image into a compressed image and error coefficients An image compression method which successively diminishes in size the image to form a compressed image. The compression is done by dividing an image into partial areas with equal size, calculating a mean pixel value in each area, and substituting the mean... | 11/08/1994 |
| 5343539 | Method for spatial domain image compression A method of spatial domain image compression comprises splitting the image up into a plurality of 2*2 sub-blocks, and then compressing each sub-block where this can be done without unacceptable loss of detail by encoding it to either 1, 2, or 3 intensity ... | 08/30/1994 |
| 5150208 | Encoding apparatus A maximum value of each block after orthogonal transformation is detected, and an output word length after orthogonal transformation is controlled in accordance with the maximum value thus detected. In addition, a plurality of tables each having a plurali... | 09/22/1992 |
| 4677479 | System for re-quantization of coded picture signals A coded picture signal re-quantization system, in which a parameter such as a variance or a mean value of picture element values in a region to be re-quantized is calculated on the basis of sub-sampled picture element values and, according to this paramet... | 06/30/1987 |
| 4677476 | Method for detecting a movement of a television signal A method for detecting a movement of a television signal corresponding to the movement of a television camera during a panning operation includes dividing a picture plane of the television signal into blocks and obtaining an absolute value of a difference... | 06/30/1987 |
