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Class Information
Number: 341/59
Name: Coded data generation or conversion > Digital code to digital code converters > To or from run length limited codes
Description: Subject matter for converting to or from codes where the number of successive ones or zeros occurring in the code is constrained not to exceed a predetermined limit.

Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
5521598 RLL/NRZ decoder programmable for single/dual bit output data streams May. 28, 1996
5517533 Parallel implementation of run length coding apparatus and method May. 14, 1996
5510788 Data conversion apparatus Apr. 23, 1996
5511080 Playback data detecting method for improving bit error rate for random error Apr. 23, 1996
5491479 8B-16B RLL decoder with hamming distance detection Feb. 13, 1996
5491698 Setting optimal boundary thresholds in a decoder for coded signal processing channels Feb. 13, 1996
5486828 Coding/decoding method and apparatus therefor Jan. 23, 1996
5451943 Data recording method and data recording apparatus using a digital sum value of a coded signal Sep. 19, 1995
5432799 Modulating method Jul. 11, 1995
5430745 Prejudging current state in a decoder for coded signal processing channels Jul. 4, 1995
5422641 Digital modulator and demodulator circuit Jun. 6, 1995
5420583 Fiber optic channel extender interface method and apparatus May. 30, 1995
5420844 Information recording and reproducing apparatus for reducing average DC level variation May. 30, 1995
5400023 Modulating method and demodulating method as well as modulating apparatus and demodulating apparatus Mar. 21, 1995
5396239 Data and forward error control coding techniques for digital signals Mar. 7, 1995
5373513 Shift correction code system for correcting additive errors and synchronization slips Dec. 13, 1994
5371771 Circuit for calculating DC value in digital recording and reproducing system Dec. 6, 1994
5357546 Multimode and multiple character string run length encoding method and apparatus Oct. 18, 1994
5357524 Apparatus for converting a digital signal Oct. 18, 1994
5349350 Run length limited encoding/decoding system for low power disk drives Sep. 20, 1994
5347276 Serial binary pattern generator Sep. 13, 1994
5321397 Data encoder for producing and storing info runlength value, bit length values and encoded words from input data values Jun. 14, 1994
5311178 Method for processing sample values in an RLL channel May. 10, 1994
5271016 Shift-correcting code system with efficient symbol-to-channel bit transformation Dec. 14, 1993
5270714 Encoding and decoding circuit for run-length-limited coding Dec. 14, 1993
5260703 Data encoding and decoding within PRML class IV sampling data detection channel of disk drive Nov. 9, 1993
5257270 Shift-correction code rate-enhancing parity encoding/decoding Oct. 26, 1993
5243605 Modified Viterbi detector with run-length code constraint Sep. 7, 1993
5241309 Data coding for fast start-up of PRML receivers Aug. 31, 1993
5231545 Fault tolerant RLL data sector address mark decoder Jul. 27, 1993
5225832 High speed variable length decoder Jul. 6, 1993
5220325 Hierarchical variable length decoder for digital video data Jun. 15, 1993
5220568 Shift correcting code for channel encoded data Jun. 15, 1993
5198813 Digital recording system with (8,16,2,5) run length limited (RLL) code Mar. 30, 1993
5196849 Method and apparatus for implementing PRML codes with maximum ones Mar. 23, 1993
5184125 Data encoding and demodulation system Feb. 2, 1993
5179711 Minimum identical consecutive run length data units compression method by searching consecutive data pair comparison results stored in a string Jan. 12, 1993
5177482 RLL encoder and decoder with pipelined plural byte processing Jan. 5, 1993
5175545 Data coding system in a magnetic recording apparatus Dec. 29, 1992
5173694 Binary data encoding and decoding using a rate 2/5 (2,18,2) code Dec. 22, 1992
5144304 Data and forward error control coding techniques for digital signals Sep. 1, 1992
5142421 Device for recording a digital information signal on a record carrier Aug. 25, 1992
5140474 Device for recording a digital information signal on a record carrier Aug. 18, 1992
5140322 Coder unit for variable word length code Aug. 18, 1992
5136436 Apparatus for recording a digital information signal and utilizing the digital sum value thereof to record an auxiliary digital signal, and apparatus for reproducing such recorded signals Aug. 4, 1992
5099237 Method and apparatus for providing maximum rate modulation or compression encoding and decoding Mar. 24, 1992
5062011 Address mark generating method and its circuit in a data memory Oct. 29, 1991
5062152 PCM signal coding Oct. 29, 1991
5060242 Non-destructive lossless image coder Oct. 22, 1991
5047767 Apparatus utilizing a four state encoder for encoding and decoding A sliding block (1,7) code Sep. 10, 1991

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