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Browse by Category: Main > Optical & Optics
Class Information
Number: 382/246
Name: Image analysis > Image compression or coding > Lossless compression > Huffman or variable-length coding
Description: Subject matter in which image data are encoded using a variable length code, such that the most common image data have the shortest codes.










Patents under this class:
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Patent Number Title Of Patent Date Issued
6215422 Digital signal huffman coding with division of frequency sub-bands Apr. 10, 2001
6205251 Device and method for decompressing compressed video image Mar. 20, 2001
6205254 Image coding apparatus and method, and image decoding apparatus and method Mar. 20, 2001
6201896 Picture encoding apparatus Mar. 13, 2001
6201487 Error detecting circuit in a line length decoding system Mar. 13, 2001
6192159 Method for encoding digital information Feb. 20, 2001
6188791 Image processing apparatus Feb. 13, 2001
6188797 Decoder for programmable variable length data Feb. 13, 2001
6188793 Encoding apparatus, decoding apparatus, encoding method and decoding method Feb. 13, 2001
6167091 Image data encoding apparatus Dec. 26, 2000
6134349 Device and method for processing run-length encoded signals by using an address generator Oct. 17, 2000
6128412 Statistical data compression/decompression method Oct. 3, 2000
6101281 Method for improving data encoding and decoding efficiency Aug. 8, 2000
6101282 Apparatus and method for image data encoding Aug. 8, 2000
6091856 Picture encoding device for compressing picture data Jul. 18, 2000
6088039 Compression of grey scale images of text Jul. 11, 2000
6075619 Image processing apparatus and method Jun. 13, 2000
6075523 Reducing power consumption and bus bandwidth requirements in cellular phones and PDAS by using a compressed display cache Jun. 13, 2000
6067381 Method of reinitializing dictionaries in a data transmission system using data compression May. 23, 2000
6064774 Image processing method and system and computer program product therefor May. 16, 2000
6055272 Run length encoder Apr. 25, 2000
6052493 Image data compression/expansion system having an analog interpolation mix Apr. 18, 2000
6052488 Image coding apparatus for converting image information to variable length codes of predetermined code size, method of image coding and apparatus for storing/transmitting image Apr. 18, 2000
6037982 Multi-pass video compression Mar. 14, 2000
6038380 Data pipeline system and data encoding method Mar. 14, 2000
6031938 Image encoding apparatus with selective Markov and predictive coding Feb. 29, 2000
6025932 Digital information encoding apparatus, digital information encoding/decoding apparatus, digital information encoding method, and digital information decoding method Feb. 15, 2000
6023294 Bit budget estimation method and device for variable word length encoders Feb. 8, 2000
6014095 Variable length encoding system Jan. 11, 2000
6011873 Method and apparatus for lossless compression of signature data Jan. 4, 2000
6009203 Method and apparatus for hybrid VLC bitstream decoding Dec. 28, 1999
6009201 Efficient table-lookup based visually-lossless image compression scheme Dec. 28, 1999
6009211 Hadamard transform coefficient predictor Dec. 28, 1999
6009205 Compressed image decompressing device Dec. 28, 1999
5999655 Method and apparatus for transmission of video pictures which are segmented to form maps of picture blocks of variable block sizes Dec. 7, 1999
5991451 Variable-length encoding using code swapping Nov. 23, 1999
5974179 Binary image data compression and decompression Oct. 26, 1999
5966470 Coding apparatus for image compression Oct. 12, 1999
5966467 System for compressing and decompressing binary representations of dithered images Oct. 12, 1999
5963260 Macroblock-level partitioned HDTV video decoder and related method Oct. 5, 1999
5963596 Audio decoder circuit and method of operation Oct. 5, 1999
5956430 Image information coding apparatus and method using code amount of a selected pixel block for changing coding parameter Sep. 21, 1999
5956153 Coding method and apparatus Sep. 21, 1999
5953456 Recording apparatus for repetitively recording image data of same frame and reproducing apparatus Sep. 14, 1999
5949912 Image coding method and apparatus Sep. 7, 1999
5933536 Variable length code processor and image processor having an integrated coding/decoding circuit Aug. 3, 1999
5933533 Image data processing method and apparatus Aug. 3, 1999
5930397 Apparatus and method for processing image signal Jul. 27, 1999
5923783 Image encoding apparatus and image decoding apparatus Jul. 13, 1999
5907638 Data compression apparatus, method and system May. 25, 1999

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