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Class Information
Number: 341/68
Name: Coded data generation or conversion > Digital code to digital code converters > To or from nrz (nonreturn-to-zero) codes
Description: Subject matter for converting digital signals to or from a digital signal waveform wherein the signal levels do not return to zero between successive bit periods.

Sub-classes under this class:

Class Number Class Name Patents
341/69 Return-to-zero to or from nrz (nonreturn-to-zero) codes 70
341/70 To or from bi-phase level code (e.g., split phase code, manchester code) 114
341/71 To or from bi-phase space or mark codes (e.g., double frequency code, fm code) 27
341/73 To or from coded mark inversion 42
341/72 To or from delay modulation code (e.g., miller code, three frequency code, mfm code) 26
341/74 To or from double density code 4

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8633837 Encoding and decoding methods and devices employing dual codesets Jan. 21, 2014
8493247 Methods and systems for decoding data Jul. 23, 2013
8493246 Methods and systems for decoding data Jul. 23, 2013
8411808 Information processing device, receiving method, and wireless communication system Apr. 2, 2013
8340208 Information processing device and signal processing method Dec. 25, 2012
8258989 Data demodulator, data demodulation method and program thereof Sep. 4, 2012
8078935 Method and system for encoding and decoding information with modulation constraints and error control Dec. 13, 2011
8063747 RFID tag, interrogator and system with improved symbol encoding and decoding Nov. 22, 2011
7973681 High speed, low power non-return-to-zero/return-to-zero output driver Jul. 5, 2011
7920076 Run length limiter and run length limiting method Apr. 5, 2011
7852238 Balanced disparity frame sync Dec. 14, 2010
7843366 DVD EFM modulation architecture using two passes to reduce circuit size Nov. 30, 2010
7839309 Multispeed communications device Nov. 23, 2010
7612697 Rate-28/30 DC-free RLL code Nov. 3, 2009
7492287 Two-bit tri-level forced transition encoding Feb. 17, 2009
7489258 Device and method for embedding a secondary signal in a primary data bit stream on an optical disc Feb. 10, 2009
7486209 Demodulation table, demodulating device and demodulating method, program, and recording medium Feb. 3, 2009
7479906 Multispeed communications device Jan. 20, 2009
7436331 Rate-28/30 DC-free RLL code Oct. 14, 2008
7425906 Method of code generation, and method and apparatus for code modulation Sep. 16, 2008
7362839 Techniques to adjust vertical offset Apr. 22, 2008
7358871 Method and system for decoding data Apr. 15, 2008
7317408 Digital modulation apparatus and digital modulation method Jan. 8, 2008
7301484 Data decoder Nov. 27, 2007
7286064 Two-dimensional modulation encoding for high density optical storage Oct. 23, 2007
7265690 Simplified data recovery from high speed encoded data Sep. 4, 2007
7256718 Modulation apparatus and method Aug. 14, 2007
7245238 Method and apparatus for data encoding Jul. 17, 2007
7221294 Multispeed communications device May. 22, 2007
7218262 Modulation system May. 15, 2007
7167518 Bandwidth-efficient modulation in communication systems Jan. 23, 2007
7164371 Method and apparatus for data coding for high density recording channels exhibiting low frequency contents Jan. 16, 2007
7135996 Multispeed communications device Nov. 14, 2006
7132967 Modulation system Nov. 7, 2006
7129863 Interval modulation coding Oct. 31, 2006
7123173 Method and system for a feed-forward encoder Oct. 17, 2006
7116250 Method and apparatus for multi-dimensionally encoding and decoding Oct. 3, 2006
7107499 System and method for adjusting a non-return to zero data stream input threshold Sep. 12, 2006
7071847 Encoding method of recording media Jul. 4, 2006
7054373 Method and apparatus for modulating and demodulating data into a variable-length code and providing a sync signal to the train of codes May. 30, 2006
7050506 Method and apparatus for modulating and demodulating data into a variable-length code and providing a sync signal to the train of codes May. 23, 2006
7050493 Bandwidth-efficient modulation in communication systems May. 23, 2006
7046736 Method and apparatus for modulating and demodulating data into a variable-length code and providing a sync signal to the train of codes May. 16, 2006
7046735 Method and apparatus for modulating and demodulating data into a variable-length code and providing a sync signal to the train of codes May. 16, 2006
7038599 Stochastic DC control May. 2, 2006
7009532 DVD recording method and rewritable DVD apparatus Mar. 7, 2006
7006020 Encoding and decoding method of a record medium Feb. 28, 2006
6995698 Method and apparatus of converting a series of data words into modulated signals Feb. 7, 2006
6947493 Dual phase pulse modulation decoder circuit Sep. 20, 2005
6933866 Variable data rate receiver Aug. 23, 2005

1 2 3 4

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