Abstract: Multiword information is encoded as based on multibit symbols disposed in relative contiguity with respect to a medium. It has wordwise interleaving, wordwise error protection code facilities and error locative clues across words of a multiword group. These originate in synchronizing channel bit groups and target data words.

Abstract: The present invention provides a biosensor system comprising a light source, a cartridge adapted to be illuminated by said light source, a light detector adapted for detecting a signal originating from the cartridge, an illumination control means adapted to vary the illumination of the cartridge between at least two different states, a means for generating a first oscillation with a first frequency, and a means for generating a second oscillation with a second frequency, wherein the frame rate of the light detector is triggered by the first oscillation and the illumination control means is triggered by the second oscillation.

Abstract: The invention relates to a magnetic sensor device (100) that can for example be used for the detection of magnetized particles (1) and that comprises at least one conductor (111, 113) and at least one magnetic sensor element, e.g. a GMR element (112). To compensate for their different thicknesses (d, h), these components are placed on a first and second region (R1, R2), respectively, that have different distances from a sensitive plane (E) of the magnetic sensor element (112). Thus a magnetic excitation field (H) generated by the conductor (111, 113) can be made perpendicular to said sensitive plane (E) in the magnetic sensor element (112). In a preferred production process, the conductor (111, 113) is for example partially embedded in a channel that is etched into the surface of a substrate (114).

Abstract: 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 converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit 13. The conversion table used by the modulation unit 12 includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit.

Abstract: How to record and play back data at a high line density. 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 converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit 13. The conversion table used by the modulation unit 12 includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit.

Abstract: A DSV control bit determining/inserting unit 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. This modulation unit converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit. The conversion table used by the modulation unit includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit. In addition, the conversion table enforces a conversion rule, according to which the remaineder of division of the “1” count of an element in a data string by 2 having a value of 0 or 1 shall always be equal to the remainder of division of the “1” count of an element in the code resulting from conversion of the data string by 2.

Abstract: A device is disclosed for encoding a stream of databits of a binary source signal (S) into a stream of databits of a binary channel signal (C), wherein the bitstream of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) adapted to convert said source words into corresponding m-bit channel words (y1, y2, y3). The converting means (CM) are further adapted to convert n-bit source words into corresponding m-bit channel words, such that the conversion for each n-bit source word is parity inverting (table I) (FIG. 1). The relations hold that m>n≧1, p≧1, and that p is an odd integer that can vary. Preferably, m=n+1.

Abstract: A DSV control bit determining/inserting unit 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. The modulation unit converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit. The conversion table used by the modulation unit includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit.

Abstract: How to record and play back data at a high line density. 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 converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit 13. The conversion table used by the modulation unit 12 includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit.

Abstract: A method for encoding multiword information by wordwise interleaving and wordwise error protection with error locative clues derived from synchronizing channel bit groups and directed to target words, a method for decoding such information, a device for encoding and/or decoding such information, and a carrier provided with such information

Abstract: A method for encoding multiword information by wordwise interleaving and wordwise error protection with error locative clues derived from synchronizing channel bit groups and directed to target words, a method for decoding such information, a device for encoding and/or decoding such information, and a carrier provided with such information. Multiword information is encoded as based on multibit symbols disposed in relative contiguity with respect to a medium. It has wordwise interleaving, wordwise error protection code facilities and error locative clues across words of a multiword group. These originate in synchronizing channel bit groups and target data words.

Abstract: [Problem] How to record and play back data at a high line density. [Means for Solving the Problem] 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 converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit 13. The conversion table used by the modulation unit 12 includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit.

Abstract: A DSV control bit determining/inserting unit inserts DSV control bits into an input data string and outputs the string including the DSV control bits to a modulation unit which converts the string with basic data length of 2 bits into variable length code with basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit. The conversion table includes substitution codes for limiting the number of consecutive appearances of a minimum run and substitution codes for keeping a run length limit. The conversion table enforces a conversion rule: the remainder of division of the “1” count of an element in a data string by 2 having a value of 0 or 1 equals the remainder of division of the “1” count of an element in the code resulting from conversion of the data string by 2.

Abstract: An apparatus for reading an optical data carrier (1) in accordance with the invention, comprises a transducer (5) for optically reading an optically readable pattern recorded in substantially parallel data tracks of the data carrier (1). The transducer (5) generates a read signal (S0(t)) which is an indication of the optically readable pattern. The apparatus further includes unit for realizing a relative movement of the transducer (5) with respect to the data carrier (1). The apparatus also has correction unit (16, 17, 18) for reducing tangential tilt (IT) and error, signal generating unit (20) for generating an error signal (SE(t) for the correction unit. The apparatus characterized in that the error signal generating unit (20) are adapted to derive the error signal (SE(t)) from a temporal asymmetry of the response of the read signal (S0(t)) to the optically readable pattern.

Abstract: Multiword information is based on multibit symbols disposed in relative contiguity with respect to a medium, and is encoded with a wordwise interleaving and wordwise error protection code for providing error locative clues across multiword groups. In particular, the clues originate in high protectivity clue words (BIS) that are interleaved among clue columns, and also in synchronizing columns constituted from synchronizing bit groups. The synchronizing columns are located where the clue columns are relatively scarcer disposed. The clues are directed to low protectivity target words (LDS) that are interleaved in a substantially uniform manner among target columns which form uniform-sized column groups between periodic arrangements of clue columns and synchronizing columns.

Abstract: An apparatus in accordance with the invention for reading and/or writing information from/onto an optical data carrier (1) has a transducer (5) for generating a detection signal (S0) in response to a signal (x) recorded on the data carrier. The apparatus has correction unit (16, 17, 18) for reducing errors in the detection signal (S0) as a result of radial tilt. The apparatus further has error signal generating unit (20) for generating an error signal (Se) for the correction unit (16, 17, 18). The error signal generating unit (20) calculate the error signal (Se) from correlations between a first auxiliary signal (S1) and a second auxiliary signal (S2) and from correlations between the first auxiliary signal (S1) and a third auxiliary signal (S3), which auxiliary signals are derived from the detection signal (S0). The second (S2) and the third auxiliary signal (S3) are estimates of the recorded signal (x).

Abstract: A device is disclosed for encoding a stream of databits of a binary source signal (S) into a stream of databits of a binary channel signal (C), wherein the bitstream of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) adapted to convert said source words into corresponding m-bit channel words (y1, y2, y3). The converting means (CM) are further adapted to convert n-bit source words into corresponding m-bit channel words, such that the conversion for each n-bit source word is parity preserving (table I) (FIG. 1). The relations hold that m>n≧1, p≧1, and that p can vary. Preferably, m=n+1.

Abstract: An amplitude detector for signals having a periodical character, recorded on a recording medium, including a first delay line and a second delay line, wherein an average maximum value of the detected signal is stored in the first delay line for each one of a predetermined number of detection instants within a detection period, and an average minimum value of the detected signal is stored in the second delay line for each one of the detection instants, means for determining an average level between the average maximum and minimum values for each detection instant on the basis of the output signals of the two delay lines, and means for comparing the current signal to be detected for a given detection instant with the average level for the detection instant so as to provide a detection signal.

Abstract: A device is disclosed for encoding a stream of databits of a binary source signal into a stream of databits of a binary channel signal. The device comprises a merging unit (4′) for merging a 1-bit merging word at equidistant positions in the serial datastream of the binary source signal, so as to obtain a composite binary source signal. A shuffling step is carried out on the composite binary source signal in a shuffling unit (8′). Next a conversion is carried out in a converter unit (10′), resulting in the channel signal (FIG. 2). Further, a decoding device is disclosed for decoding the channel signal obtained by means of the encoding device.

Abstract: An optical disk drive for reading and/or writing information from/on an optical disk includes an auxiliary lens to compensate for optical aberrations and a servo loop for positioning the auxiliary lens relative to a main lens. The servo loop includes an actuator for driving the auxiliary lens and a controller to feed the actuator coil with a drive current dependent on a position signal which is derived from the actual inductance of the actuator coil and a reference signal which indicates a desired position of the scan element. The disk drive also includes an inductance influencing device to vary the inductance of the actuator coil as a function of the position of the scan element.