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7372600 |
Color facsimile device with data recompressing capability
JPEG data is efficiently recompressed and transmitted to a remote color facsimile device. Before transmission of recompressed JPEG data, an anticipated transmission time is displayed for enabling...
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7305490 |
Preparing electronic data for transmission
A method for preparing electronic data for transmission includes calculating a duration for compressing the electronic data, calculating a duration for transmitting the electronic data if not...
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7230735 |
Forward link text compression in satellite messaging
A method of transmitting communication information employing a coding scheme being defined by a character set. The characters of the character set are encoded into codewords of a sequence of bits,...
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7016065 |
Image processing method and apparatus with multiple coding units
The invention relates to an image processing apparatus which has a coding function of image data and inputs and outputs an image and a method for such an apparatus, and has an object to...
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6844943 |
Method and apparatus for video recording from previous recorded video
A system and method for eliminating absent or poor quality video sections from a video recording, such as a second generation of video recording. Synchronizing pulses associated with a video signal...
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6646756 |
Printing apparatus and method which controls driving of a printing head according to received data
A distinction apparatus of a printing apparatus distinguishes data compression rate according to each of the data transferred from a host computer, and a mode selection apparatus selects a printing...
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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...
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5771102 |
Process for the transmission of images
The process for transmission of images enables various classes of source-coded image data to be channel-coded and transmitted at various class code rates. For this purpose, source-coded image data...
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5710639 |
Scan line compressed facsimile communication system
A selective call receiver includes a receiver (103), a controller (105), and a display (113) for presenting a recovered source document. The receiver (103) provides a received paging message that...
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5706103 |
Image processing device, for use in scanner, printer, digital copying machine and display device
An image processing device comprises an encoder for encoding inputted image data in the form of fixed length compression. The encoded data encoded in the form of the fixed length compression by the...
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5506686 |
Method and device for determining bit allocation in a video compression system
The present invention provides a method (100) and device (200) for allocating bits to video pictures in a video compression system. A sequence of video frames or pictures is received, and the...
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5463476 |
Image processing system
An image processing system having a data compressor for selectively compressing image data, data storage for selectively storing the compressed data from the data compressor, a page buffer for...
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5444542 |
Image processing apparatus and method
An apparatus is provided for quantizing data obtained by transforming image data to a frequency zone so as to encode it. The speed at which such an apparatus performs processing is increased. Data...
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5377018 |
Video compression and decompression using block selection and subdivision
A frame of digitized video data is compressed by dividing the frame into a plurality of rectangular blocks each typically measuring 4 pixels by 4 pixels. The entropy of each block is determined by...
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5331427 |
Image reproducing apparatus
An image reproducing apparatus includes an input part for inputting digital signals indicating an image and for inputting supplementary digital signals, a composition part for coding the digital...
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5331425 |
Image data encoding apparatus providing increased encoding efficiency with reduced dependency on image content
A data encoding apparatus, applicable for example to a facsimile apparatus, increases the degree of image data compression that can be achieved by a variable length encoding scheme, by limiting the...
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5307177 |
High-efficiency coding apparatus for compressing a digital video signal while controlling the coding bit rate of the compressed digital data so as to keep it constant
Digital video signals are divided in blocks, maximum and minimum values of each block are extracted, and a frequency distribution of one frame period of a dynamic range in each block is detected....
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5291303 |
Facsimile apparatus
A facsimile apparatus has a first coder for coding image data by a one-dimensional coding method or a two-dimensional coding method, and a second coder for performing coding by a second coding...
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5229863 |
High speed CCITT decompressor
A new and improved decoder for decoding CCITT compressed image data. This decoder separates all the incoming codes into short codes and long codes. The short codes are sent to the short channel...
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5153747 |
Color scanner with built-in color compression hardware to reduce scan time
The color image scanner includes built-in color compression capabilities to reduce scan time. The improved color scanner scans a color image on a document to provide color image data having a...
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4754336 |
Picture data communication system with scanning pattern change
A picture data communication system with a scanning pattern change includes a plurality of scanning pattern selecting units responsive to input picture signals for selecting a type of scanning...
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4413287 |
White line skipping
A white line skipping technique for data reduction is disclosed for reducing facsimile transmission time. Video processing for white line skipping centers around the use of a five element solid...
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4396952 |
Facsimile transmission apparatus
Apparatus for evaluating, characterizing and transmitting facsimile data at an efficiency exceeding one transmission bit per elemental scan area but in such a manner as to avoid the drop-out of...
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4303947 |
Image interpolation system
Analog image data pixels are sampled and held to produce a box car wave representative of the image data. Wave height differences are bridged by linear interpolation, with frequency enhancement...
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T964004 |
Time-base instability compensation apparatus for use in copy/duplication
apparatus is disclosed which compensates for time-base instabilities in analog signals representative of a document image and includes an analog-to-digital converter for digitizing such analog...
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3394352 |
Method of and apparatus for code communication
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