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| Number | Title | Issue Date |
| 7973681 | High speed, low power non-return-to-zero/return-to-zero output driver A gating logic receives a non-return-to-zero (NRZ) input signal and couples the NRZ input signal as an NRZ output signal when operating in a NRZ mode of operation and converts the NRZ input signal to a return-to-zero (RZ) output signal when operating in a RZ mode of... | 07/05/2011 |
| RE41517 | Recovery and transmission of return-to-zero formatted data using non-return-to-zero devices Return-to-zero (RZ) formatted data is recovered and transmitted using non-return-to-zero (NRZ) devices. A NRZ clock and data recovery device (CDR) interprets the clock rate of a RZ formatted signal as twice its actual clock rate. Due to this interpretation, extra ze... | 08/17/2010 |
| 7710295 | Inverter based return-to-zero (RZ)+non-RZ (NRZ) signaling Embodiments of the invention are generally directed to systems, methods, and apparatuses for inverter based return-to-zero (RZ)+non-RZ (NRZ) signaling. The interface circuit contains multiple ganged drivers (some or all of them are turned on at one point of time) an... | 05/04/2010 |
| 7436331 | Rate-28/30 DC-free RLL code A run-length limited (RLL) encoder includes a problematic-block detection module that receives a data block and that generates coding bits that indicate whether at least one of N portions of the data block include one of all ones and all zeros, where N is an integer... | 10/14/2008 |
| 7425906 | Method of code generation, and method and apparatus for code modulation A method of generating codewords that conform to a run length limited (RLL) constraint represented by (d, k, a, b), where d is a minimum run length of a codeword, k is a maximum run length of the codeword, a is a length of source data, and b is a length of the codew... | 09/16/2008 |
| 7366071 | Data recording method and device, data recording medium, data reproduction method and device The present invention provides a DSV normal controller and a DSV special controller. In only a predetermined region designated on an optical disc, the DSV special control is performed. The DSV special control causes the absolute value of the DSV to increase so that ... | 04/29/2008 |
| 7362719 | Method and apparatus for cross-talk cancellation in frequency division multiplexed transmission systems A method and apparatus are disclosed for canceling cross-talk in a frequency-division multiplexed communication system. The disclosed frequency-division multiplexed communication system employs multiple carriers having overlapping channels and provides an improved c... | 04/22/2008 |
| 7342520 | Method and system for multilevel serializer/deserializer A serial bit transparent data transferring technique eliminating the bit ambiguity problem of the standard time-division multiplexing/demultiplexing architecture without introduction of any extra latency. A serializer multiplexer converts input parallel data words i... | 03/11/2008 |
| 7342521 | System and method for multi-channel delay cell based clock and data recovery Systems and methods regarding the restoration of serialized data to parallel data with a low speed reference signal are provided. In exemplary embodiments, a phased lock loop receives a reference clock signal from a data source and generates a reference high speed c... | 03/11/2008 |
| 7317408 | Digital modulation apparatus and digital modulation method A digital modulation apparatus capable of generating a modulated code so that binary slice is correctly performed when reproducing is provided. To achieve this, in a digital modulation apparatus (10A), a DSV change amount calculator (15) calculates cha... | 01/08/2008 |
| 7289048 | Duo-binary encoder and optical duo-binary transmission apparatus using the same A duo-binary encoder performs a parallel processing and an optical duo-binary transmission apparatus using the encoder to enhance transmission capability. The duo-binary encoder has a judgment unit for judging whether an odd number or even number of ‘0’s exists ... | 10/30/2007 |
| 7289046 | Data recording medium, data recording method and device, and encode method and device A recording method for converting m-bit data into n-bit (where n>m) data whose run length is restricted and recording the converted data on a recording medium, the recording method comprising the step of selecting first n-bit data according to an immediately precede... | 10/30/2007 |
| 7265690 | Simplified data recovery from high speed encoded data The present invention facilitates data recovery without requiring selection of a sample phase. The data is recovered by sampling a received signal to obtain a number of samples at a number of phases over a given time period referred to as a bit time. The samples are... | 09/04/2007 |
| 7228480 | Rate-1 coding for increasing timing information in recording data A method for encoding a bit stream to meet a minimum bit transition requirement includes providing uncoded bits, determining whether the uncoded bits meet the minimum bit transition requirement, and replacing selected bits in the uncoded bits with replacement bits t... | 06/05/2007 |
| 7228154 | Method and system for processing wireless digital multimedia A transmit digital processing system for wireless transmission of HDMI and/or DVI data using an FPGA. The FPGA converts the data into two data streams and includes a front end component multiplexing video data with control data. A complementary receive FPGA is also ... | 06/05/2007 |
| 7164371 | Method and apparatus for data coding for high density recording channels exhibiting low frequency contents A method and apparatus for data coding for high-density recording channels exhibiting low frequency contents is disclosed. Coding is used that satisfies both Running Digital Sum (RDS) and Maximum Transition Run (MTR) properties, which are desirable for achieving hig... | 01/16/2007 |
| 7071847 | Encoding method of recording media An encoding method of recording media is used to speed up the encoding procedure in a recording media. Different conditions of states and paths set in advance during the encoding procedure to simply the actual operation loading for possible paths in the look-ahead c... | 07/04/2006 |
| 7038599 | Stochastic DC control When recording data on a record carrier of the DC content of the data recorded is important in order to allow accurate reproduction of the data. The Digital Sum Value represents the DC content; the Digital Sum Value can be controlled by replacing code words at the o... | 05/02/2006 |
| 7038488 | Programmable logic device with transceiver and reconfigurable PLL A programmable logic device (PLD) includes a transceiver, configurable phase-locked loop (PLL) circuits, and programmable logic circuits. The logic circuits and PLL circuits are programmed to enable the transceiver to flexibly respond to various types of input seria... | 05/02/2006 |
| 7002724 | Apparatus and method for generating a 90° alternate phase optical pulsetrain Various apparatus and methods for generating a 90° AP optical pulsetrain. In one embodiment, the apparatus includes: (1) a phase-modulated optical signal generator configured to generate a phase-modulated optical signal having a carrier band and sidebands phase-shi... | 02/21/2006 |
| 6989777 | Simplified data recovery from high speed encoded data The present invention facilitates data recovery without requiring selection of a sample phase. The data is recovered by sampling a received signal to obtain a number of samples at a number of phases over a given time period referred to as a bit time. The samples are... | 01/24/2006 |
| 6975259 | Continuous-time delta-sigma ADC with programmable input range A scaled input current is produced that substantially matches the full scale input of a CTΔτADC that substantially cancels an offset bias current component of the input current. A variable bias resistance value is coupled between the integrator input and one of a ... | 12/13/2005 |
| 6968002 | Method and apparatus for time aligning data modulators using frequency domain analysis of detected output Method and apparatus for time aligning first and second signals. The second signal is modulated by the first signal to provide a third signal. Frequency components of the third signal are then determined, the frequency components being indicative of time alignment b... | 11/22/2005 |
| 6927708 | Mapping system for transmission and reception of multiple data types A transmitter transmits successive data fields, and each data field includes a mix of VSB data segments and E-VSB data segments and interleaved portions of maps. The maps define the mixes of VSB data segments and E-VSB data segments in corresponding data fields to b... | 08/09/2005 |
| 6909386 | Duo-binary encoder and optical duo-binary transmission apparatus An optical duo-binary transmission apparatus using an optical duo-binary transmission method is disclosed. The apparatus includes a duo-binary encoder that performs parallel processing. The duo-binary encoder includes a level change detection unit for detecting that... | 06/21/2005 |
| 6853320 | Modulation system A 6-bit output code word is generated in response to every 4-bit input code word by referring to a set of encoding tables. The encoding tables contain output code words assigned to input code words, and contain encoding-table designation information accompanying eac... | 02/08/2005 |
| 6842125 | Unipolar electrical to CSRZ optical converter A conversion method for converting a unipolar voltage data stream into a carrier-suppressed return-to-zero (CSRZ) optical data stream includes modulating a continuous optical wave with an encoded nonreturn-to-zero (NRZ) voltage data stream for providing a CSRZ optic... | 01/11/2005 |
| 6829300 | Signal processing method and device A recompression program 23 being a video edition software 20 executed by a personal computer 17 on a compressed video data supplied from a DV camera deck 11 or hard disc drive 12 and variable-length coded for conformance to the DV ... | 12/07/2004 |
| 6778104 | Method and apparatus for performing DSV protection in an EFM/EFM+ encoding same An EFM/EFM+ encoding system is adapted to modulate a source symbol sequence into a modulated bit sequence that is further converted to a channel bit sequence, which is to be recorded on a recording medium and which has a cumulative Digital Sum Value (DSV), through N... | 08/17/2004 |
| 6700511 | Data conversion method, method for obtaining waveform information from square wave using the same, and method for generating square wave from waveform information using the same The present invention relates to a data conversion method for providing efficient conversion between data of different unit lengths, a method for obtaining waveform information from a square wave using the same, and a method for generating the square wave... | 03/02/2004 |
| 6690308 | Computer program for implementing a modulation method and a demodulation method therefor A 6-bit output code word is generated in response to every 4-bit input code word by referring to a set of encoding tables. The encoding tables contain output code words assigned to input code words, and contain encoding-table designation information accom... | 02/10/2004 |
| 6680679 | Method and apparatus for electrical conversion of non-return to zero encoded signal to return to zero encoded signal A method and apparatus for electrically converting a NRZ signal into a RZ signal. A NRZ signal is summed with a phase-aligned clock signal. The resultant summed signal is then passed through a biased PHEMT transistor which has highly non-linear characteri... | 01/20/2004 |
| 6643040 | Optical signal converter from RZ format to NRZ format The present invention is a device for converting an RZ signal into a NRZ signal which contains an optical bistable device (5), where an output level of this device passing from a low level to a high level when an input power level crosses in an upward dir... | 11/04/2003 |
| 6630898 | Low voltage, unit delay quantizer with feedforward auto-zero mechanism An auto-zeroed quantizer that has a unit delay characteristic employs switched capacitor techniques to adjust the input common-mode voltage to a proper common-mode voltage for the quantizer. A feed-forward auto-zero scheme is used to initialize the appara... | 10/07/2003 |
| 6624766 | Recovery and transmission of return-to-zero formatted data using non-return-to-zero devices Return-to-zero (RZ) formatted data is recovered and transmitted using non-return-to-zero (NRZ) devices. A NRZ clock and data recovery device (CDR) interprets the clock rate of a RZ formatted signal as twice its actual clock rate. Due to this interpretatio... | 09/23/2003 |
| 6611216 | Fast look-up table based scheme for NRZI encoding/decoding and zero insertion/removal in serial bit streams A look-up table scheme for performing non-return-to-zero inverted (NRZI) encoding on input data bytes. Also disclosed is a look-up table scheme for performing zero-insertion in data streams that so require. An address is formed from an input data byte and... | 08/26/2003 |
| 6597295 | Decoding apparatus and decoding method A data-decoding apparatus having bit-detecting section 4. In the apparatus, an RF signal is reproduced from a recording medium and converted to digital data. If the RF signal has a level (amplitude) equal to a comparator level, the bit-detecting section 4... | 07/22/2003 |
| 6573848 | Modulation system using encoding tables and method therefor A 6-bit output code word is generated in response to every 4-bit input code word by referring to a set of encoding tables. The encoding tables contain output code words assigned to input code words, and contain encoding-table designation information accom... | 06/03/2003 |
| 6492915 | Method for recording information, method for reproducing information, and information recording apparatus A method and apparatus for recording and reproducing information to and from an optical disk. If the size of a shortest mark is made small, a signal amplitude lowers and errors are likely to occur. In order to overcome this problem, when data of asymmetri... | 12/10/2002 |
| 6476748 | Method and apparatus for cyclic return to zero techniques for digital to analog convertors This invention relates generally to methods and apparatuses for implementing cyclic return to zero techniques for digital to analog (D/A) conversion. Generally, embodiments of the invention disclose techniques for generating low-distortion continuous-time... | 11/05/2002 |
