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Patent Searching and Data


Matches 651 - 700 out of 5,340

Document Document Title
JP3960868B2
To provide a pulse width modulator for generating a PWM signal with less nonlinear distortion in interpolation processing needing a small arithmetic amount. A weight coefficient W is obtained by arithmetic processing of W=[1+α(X2-X1)][0...  
JP3953481B2
To provide a codeword generating and mapping method with which high efficiency is provided in terms of recording density by using a short codeword bit as a main conversion codeword length, and an excellent DC suppression capability is pr...  
JP3954778B2
To enhance conversion efficiency and increase a recording density while sufficiently suppressing low frequency components of a modulation signal in a signal recorded on the recording medium. As a conversion table for directly converting ...  
JP3953482B2
To provide high efficiency in recording density by using short codeword bits as codeword length for main conversion, and provide a method for generating and arranging the codeword having excellent DC suppression capability, by arranging ...  
JP3950579B2
To reduce the occurrence of error events which become impossible to be detected in the error correction by adding a parity bit capable of detecting an error in the reproduction to a constant length block of encoded data and controlling a...  
JP2007520843A
The present invention relates to the method and equipment which control at least one read-out parameter of a magnetic-domain-enlargement optical magnetic recording medium. The average detection run length of a reading signal is supervise...  
JP3947510B2
To provide a data modulation method and apparatus, a data demodulation method and apparatus, and a code arranging method. The invention includes a multiplexer which multiplexes an input data stream divided for a fixed length on a plurali...  
JPWO2007080635A
Whether an input signal is changed and outputted to which signal of RZ signal in sync with a clock signal, and an NRZ signal, the change circuit to control, and when a clock signal is high-level, When an input signal is read, the 1st sig...  
JP3946230B2
To provide conversion means which is suitable for reducing the low-frequency content of a modulated signal. Information pattern comprises first and second parts alternating in the direction of the track; the first parts present a first p...  
JP2007519150A
The present invention relates to the method of embedding a secondary information signal at the channel data stream of the coded primary information signal, and corresponding equipment. In order to make more into difficulty for the indivi...  
JP2007158651A
To provide communication equipment in which a reception circuit is constituted by using an LC tuning circuit in the case of using a radio medium especially for a communication means between dispersedly arranged pieces of equipment and th...  
JP3935217B2  
JP2007149147A
To provide a modulating method, a modulating device, an information recording medium and a demodulating method which can improve a reliability by introducing a RLL (Run-Length Limited) signal so that a LSB (Least Significant Bit) signal ...  
JP2007514252A
The present invention relates to the coding equipment coded by two dimensions, and a corresponding method along with the two-dimensional channel strip of at least 2-bit line which developed the user datum of the user-datum stream in one ...  
JP3923143B2
To provide an encoder/decoder(ENDEC) whose execution is not complicated and which can prevent an error in a decoding output from being propagated. An encoder uses an identical mapping circuit so as to code the high-order byte and the low...  
JP2007513448A
The present invention is the symbol value of the two-dimensional channel data stream recorded on a record career a symbol sensing device to detect, and the above-mentioned channel data stream, It develops to one dimension in the 1st dire...  
JP2007512650A
Equipment generates the appearance row data (OD) which should be given in a burst cutting area (2) on an optical disc (1). Further, the burst cutting area (2) has a mark (3) which produces a mark frequency spectrum (MFS), when reading th...  
JP3916055B2
To improve the frequency of DSV (digital sum value) control and to reduce the size of a sub-coding table, in the EFMCC, in which the frequency of the DSV control with only a basic table for generating a 15-bit code word is low, and most ...  
JP2007511118A
In the case of the method and equipment which transmit a data unit with the transmission media containing at least three adjoining transmission lines, the 1st mark of two or more of all the marks is supplied. Each mark has two or more si...  
JP3910586B2  
JP2007104106A
To provide a transmitter/receiver in which the circuit scale can be miniaturized and power consumption can be reduced.The transmitter/receiver comprises a plurality of sigma delta analog digital converting sections 40 and 50 provided in ...  
JP3902763B2  
JP3903990B2
To provide an information recording medium including region for recording and playing a modulated signal(output codeword string) obtained by modulation with containment of DC element, without using redundant bits. Even if each output cod...  
JP3892020B2
To reduce the number of bit cells per an information word and to prevent reduction of the number of specific bit combination. This apparatus has a state generating means generating a code state at the time of outputting code words by a c...  
JP2007060098A
To provide two-dimensional encoding method, a program and a device in which a pixel utilization factor can be brought close to a theoretical upper limit value, i.e. a pixel utilization factor for original data can be prevented from decli...  
JP2007049477A
To obtain a decoder capable of detecting an error even when an odd number of edge detecting pulses are generated.The decoder has an edge detector 9 detecting each varying point of the rise and fall of an input encoding signal, and a cloc...  
JP3877434B2
To provide a modulation device which can eliminate a modulation pattern being not suitable for a transmission system and a modulation pattern being weak for a demodulation system. In this modulation device, a bit serial signal is divided...  
JP3872613B2
To obtain a noise reduction device applicable even in a muting state that can reduce noise by effectively utilizing an analog signal generating circuit having been originally provided to this device for noise reduction purpose. An analog...  
JP3870573B2
To supply a sure synchronizing signal pattern by adding synchronizing signals provided with a pattern for breaking a maximum run following a minimum run. A DSV bit decision/insertion part 11 performs DSV control on a data string at an op...  
JP3870209B2
To provide a demodulation method of RLL code which oppresses a DC component of a codeword stream effectively for use in an optical recording/reproducing apparatus which requires high-density recording/regenerating. Input data are modulat...  
JP3867929B2  
JP3865234B2
To operate with low power consumption and to dispense with distributing a clock signal by simplifying circuit constitution in an NRZ/RZ (non return to zero/return to zero) conversion circuit. When the clock signal is at a high level, a f...  
JP3866232B2
To provide a data communication method, a data transmitting apparatus, a data receiving apparatus and a data transmission program in which a problem of jitter caused by the combination of a 1bit noise shaping A/D converter and on-off key...  
JP3863059B2
To provide a CD which cannot be copied practically. Main data is encoded by a first encode processing or a second encode processing and recorded. Such prescribed data as in the data row encoded by the first encode processing, DSD (Digita...  
JP3856700B2
To provide a means that improves the code rate and the DC compression capability that are very important factors in the high-density recording of data and the reliability thereof when recording digital data on a record medium, for exampl...  
JP3854331B2
To reduce the delay in the timing which generates an external field and the load on the magnetic coil in a magnetooptic recording system executed under application of an external magnetic field. The method is used to record multivalued i...  
JP3851274B2  
JP3848163B2  
JP2006313958A
To provide a full digital amplifier for an audio amplifier or the like, wherein a carrier frequency in pulse width modulation is allowed to be variable to suppress concentration of electromagnetic noise radiation spectrums at a particula...  
JP3845250B2
To provide a binary image encoder that can simplify or omit the processing after coding output in the case of adopting the JBIG (Joint Bi-level Image experts Group) coding system in a stripe mode. By inserting a required number of '00h' ...  
JP2006303663A
To provide an isolation circuit for analog information using a photocoupler of one channel that can simultaneously transmit digitally-informatized one-bit binary data and clock.A PWM encoder 13 uses a PWM method for transmitting one-bit ...  
JP2006303247A
To provide a data setting circuit which is capable of setting up data in storages through one input terminal from outside, wherein the data setting circuit is designed so as to set up data in two or more storages through input signals in...  
JP2006270278A
To provide a bipolar/unipolar conversion circuit capable of attaining a stable operation, by enabling bias with a margin to be set with respect to the amplitude of an input signal at all times.An RZ conversion circuit 8 compares a bipola...  
JP2006521736A
[Subject] The power conversion system which carries out a digital pulse width modulator and such a modulator is offered. [Solution means] Two or more integrators (11) by which an integrator profit (12) is arranged in series, The pulse wi...  
JP3822681B2
To restore errorless data regardless of the existence of noise at the time of data reproducing from a recording medium. The transition of a quaternary code read out at the time of reproducing from the recording medium unequivocally deter...  
JP2006237930A
To provide a judging method which is improved in precision in discriminating a Manchester code.The judging method comprises a measuring step (53) of measuring a time between a first fall by a first Manchester code and a following fall by...  
JP3817958B2
To obtain a PWM control circuit that can generate a PWM signal high in resolution with a small circuit scale and to obtain a microcomputer and an electronic device. This PWM control circuit is provided with a PWM period setting register ...  
JP3811873B2
To simply restore a signal that is received in variable rate in a correct symbol timing by interpolating, after calculating filter count for every sample cycle and performing signal processing of only effective data among outputs of an i...  
JP3810690B2
To reproduce multi-valued data more correctly than before. When binary data are converted into multi-valued data whose each symbol consists of (n) bits (n is an integer of ≥2) and test data including 2(Mxn) combinations of the multi-va...  
JP3810790B2  

Matches 651 - 700 out of 5,340