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| Number | Title | Issue Date |
| 7206362 | Binary data transmission on a single information channel In the invention, it becomes possible to extract all clock information data processing data by simultaneously comparing first, second and third voltage levels to each data bit in clocked time increments wherein the magnitude of the increments is such that each binar... | 04/17/2007 |
| 6583887 | Method and apparatus for data compression Compression apparatus is described that operates to select an optimum compression procedure to apply to received image data. The compression apparatus can be employed in a page printer having a print engine that must be provided with video data at a const... | 06/24/2003 |
| 5253936 | Data communication apparatus and data communication method According to this invention, an image binarized by a pseudo halftone binarization processing method is forcibly encoded by an MH encoding method, and a binary image which is not binarized by the pseudo halftone binarization processing method is preferenti... | 10/19/1993 |
| 4688108 | High resolution graphics system for video/teleconferencing systems A high resolution graphics system scans an 81/2×11 inch document at a resolution of approximately 200 lines per inch and transmits a run length codes 1700×2200 pixel array facsimile signal to a remote station for display or hard copy reproduction. Alter... | 08/18/1987 |
| 4590521 | Picture element generator for facsimile receiver A high speed picture element generator for use in a digital facsimile receiver for reforming picture elements from decoded facsimile transmission signals. The picture element generator receives the decoded facsimile signals in the form of run length data ... | 05/20/1986 |
| 4409623 | Method and equipment for processing gray scale facsimile signal A gray scale facsimile signal is divided into a plurality of block signals, each composed of a plurality of picture element signals. For each block signal are obtained binary space information indicating whether the level of each picture element signal is... | 10/11/1983 |
| 4301479 | Signal processing system of facsimile A group III facsimile which substantially reduces the transmission time is disclosed wherein marks are applied to a document to be transmitted in order to identify the portions of the document depending on whether or not to be transmitted, after the docum... | 11/17/1981 |
| 4213155 | Process for improving image quality in picture telegraphy Apparatus and method for improving the picture quality during transmission of facsimile signals which have an image signal having a signal of a particular polarity but has an minimum amplitude to represent a first information state such as white and a max... | 07/15/1980 |
| 4096527 | Run length encoding and decoding methods and means Black and white run length encoding means first convert a binary video input signal having a raster scan format into binary black and white run length message codes which are preselected so that the initial or lead bit of each of those codes is at a given... | 06/20/1978 |
| 4096526 | Run length encoding and decoding methods and means Black and white run length encoding means first convert a binary video input signal having a raster scan format into binary black and white run length message codes which are preselected so that the initial or lead bit of each of those codes is at a given... | 06/20/1978 |
| 3973079 | Two-level picture signal transmission system In a transmission system in which two-level picture signal is divided into blocks, each having a predetermined number of picture elements, the pieces of signal contained in the respective blocks are converted to a predetermined number of codes, and the co... | 08/03/1976 |
