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JP4001955B2 |
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JP2007529146A |
Managing a primary bit stream involves converting a qB/rB encoded bit stream to an xB/yB encoded bit stream and multiplexing an additional bit stream with the xB/yB encoded bit stream at a transmission side of a link. The additional bit ...
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JP3993597B2 |
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 dete...
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JP3987556B2 |
A synchronisation signal generator (11) gives the clock start signal and a clock generator and synchroniser (12) produces transmission, coding and decoding signals as well as a low frequency clock. The decoder (13) samples during a recep...
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JP2007528151A |
The process involves initializing a number (N) of output candidates and selecting a number (K) of probable changes corresponding to the output candidates. A cost function is calculated to mark the output candidates and their correspondin...
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JP3985173B2 |
A DSV control bit determining/inserting unit 11 inserts DSV control bits for execution of DSV control into an input data string and outputs the data string including the DSV control bits to a modulation unit 12. The modulation unit 12 co...
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JP3980350B2 |
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JPWO2005006552A1 |
The data transfer circuit outputs the first binary voltage data of n bits (n is an integer of 2 or more) to 2.nIt is equipped with a voltage-current conversion circuit that converts the value into multi-valued current data and outputs it...
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JP3965385B2 |
To enhance rewritable number of times when recording is performed many times. When DSV absolute values of two streams generated using a plurality of kinds of code expressions provided in order to encode input data words are substantially...
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JP3966484B2 |
To encode a one-dimensional data stream into two-dimensional data arrangement in which high frequency components are reduced. A one-dimensional data stream (202) is segmented (204) into plural data chunks (206). Each data chunk is segmen...
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JP3962439B2 |
To provide an information-recording apparatus and an information- reproducing apparatus which can correctly reproduce last code data of a data sector even when information is recorded without any relation among data sectors in a DVD-RAM ...
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JP3960225B2 |
The invention concerns a data transmission device comprising a turbo coder ( 22 ) comprising an interleaver operating on two interleaving blocks and means ( 26 ) for producing symbols from said codes (D, Y 1 , Y 2 ) supplied by the turbo...
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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...
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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...
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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 ...
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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 ...
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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...
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JP2007520843A |
The present invention relates to a method and apparatus for controlling at least one readout parameter of a magneto-optical domain expansion recording medium. An average detected runlength of the reading signal is monitored, and an error...
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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...
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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...
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JP2007519150A |
The present invention relates to a method and a corresponding device for embedding a secondary information signal in a channel data stream of encoded primary information signal. In order to make it more difficult for unauthorized persons...
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JP3935217B2 |
A sequence of m-bit information words is converted to a modulated signal wherein each received information word from the sequence is converted to an n-bit code word. The code word is selected from a set of codewords that depends on a cod...
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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 ...
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JP2007514252A |
The present invention relates to an encoding apparatus and a corresponding method for two-dimensionally encoding user data of a user data stream into channel data of a channel data stream along a two-dimensional channel strip of at least...
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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...
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JP2007513448A |
The present invention relates to a symbol detection apparatus for detecting the symbol values of a two-dimensional channel data stream recorded on a record carrier, said channel data stream comprising a set of contiguous symbol strips (B...
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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 ...
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JP3910586B2 |
A 64-ary QAM (Quadrature Amplitude Modulation) demodulation apparatus and method for receiving an input signal R k (X k ,Y k ) comprised of a k th quadrature-phase signal Y k and a k th in-phase signal X k , and generating soft decision ...
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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 ...
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JP3902763B2 |
The invention relates to methods and devices for converting a stream of data bits of a binary information signal 2 into a stream of data bits of a constrained binary channel signal 3 using multiple channel codes Cst, Cpc. Apart from a st...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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JP3867929B2 |
A telecommunications device having a remote controller, which device contains a circuit arrangement for automatic identification of additional information in a program channel by means of which circuit arrangement a transmission of the p...
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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...
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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...
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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...
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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...
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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...
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JP3851274B2 |
During decoding and encoding, the starting disparity of a current block is computed by using a disparity at some previous reference point and disparity characteristics of bytes from the reference point to a current block boundary. The ch...
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JP3848163B2 |
A coding device and method in which m-bit information words are converted into n-bit code words such that the coding rate m/n is greater than ½. The coding device and method are also employed to record information on a recording medium ...
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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...
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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' ...
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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 ...
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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...
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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...
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