Abstract: A recording control apparatus includes a waveform rectification section for receiving a digital signal generated from an analog signal representing information reproduced from an information recording medium, and rectifying a waveform of the digital signal; a maximum likelihood decoding section for performing maximum likelihood decoding of the digital signal having the waveform thereof rectified, and generating a binary signal representing a result of the maximum likelihood decoding; a reliability calculation section for calculating a reliability of the result of the maximum likelihood decoding based on the digital signal having the waveform thereof rectified and the binary signal; and an adjusting section for adjusting a shape of a recording signal for recording the information on the information recording medium based on the calculated reliability.

Abstract: A recording control apparatus includes a waveform rectification section for receiving a digital signal generated from an analog signal representing information reproduced from an information recording medium, and rectifying a waveform of the digital signal; a maximum likelihood decoding section for performing maximum likelihood decoding of the digital signal having the waveform thereof rectified, and generating a binary signal representing a result of the maximum likelihood decoding; a reliability calculation section for calculating a reliability of the result of the maximum likelihood decoding based on the digital signal having the waveform thereof rectified and the binary signal; and an adjusting section for adjusting a shape of a recording signal for recording the information on the information recording medium based on the calculated reliability.

Abstract: An information reproduction apparatus of the present invention comprises a rotating section 2 for rotating an information carrier 1 on which a unit of continuous information capable of being continuously read out is recorded, a CLV control section 9 for controlling the rotating section in such a manner that the information carrier is rotated at a constant linear velocity, a CAV control section 9 for controlling the rotating section in such a manner that the information carrier is rotated at a constant angular velocity, a rotation control selection 14 for selectively operating the CLV or CAV control section, and an information determination section 14 for detecting an information length of the continuous information. The rotation control selection section is constructed in such a manner as to selectively operate the CLV or CAV control section based on a result of the detection of the information length of the continuous information.

Abstract: An optical disc apparatus is provided, which comprises a signal detection section for detecting a wobble signal from a reproduced signal of an optical disc, and a generation section for generating a clock signal in synchronization with the wobble signal. The generation section comprises a first difference signal generation section for generating a first difference signal indicating a difference between a frequency of the wobble signal and a frequency of the clock signal, a period detection section for detecting a modulation period of the wobble signal based on the first difference signal, and an adjustment section for adjusting the frequency of the clock signal based on a predetermined signal other than the first difference signal during a modulation period, and adjusting the frequency of the clock signal based on the first difference signal during a period other than the modulation period.

Abstract: A recording control apparatus includes a waveform rectification section for receiving a digital signal generated from an analog signal representing information reproduced from an information recording medium, and rectifying a waveform of the digital signal; a maximum likelihood decoding section for performing maximum likelihood decoding of the digital signal having the waveform thereof rectified, and generating a binary signal representing a result of the maximum likelihood decoding; a reliability calculation section for calculating a reliability of the result of the maximum likelihood decoding based on the digital signal having the waveform thereof rectified and the binary signal; and an adjusting section for adjusting a shape of a recording signal for recording the information on the information recording medium based on the calculated reliability.

Abstract: An information reproduction apparatus of the present invention comprises a rotating section 2 for rotating an information carrier 1 on which a unit of continuous information capable of being continuously read out is recorded, a CLV control section 9 for controlling the rotating section in such a manner that the information carrier is rotated at a constant linear velocity, a CAV control section 9 for controlling the rotating section in such a manner that the information carrier is rotated at a constant angular velocity, a rotation control selection 14 for selectively operating the CLV or CAV control section, and an information determination section 14 for detecting an information length of the continuous information. The rotation control selection section is constructed in such a manner as to selectively operate the CLV or CAV control section based on a result of the detection of the information length of the continuous information.

Abstract: Data is read from a recording medium and the reproduced data is deinterleaved and stored to a first memory while input/output to/from the first memory is arbitrated. It is determined whether a predetermined number of data units is stored to the first memory. Based on the result data, it is determined whether transfer of the data stored in first memory to a second memory is permitted. If data transfer is permitted, the reproduced data is transferred from the first memory to the second memory, during which time input/output to/from the second memory is arbitrated. The reproduced data stored to the second memory is then error corrected, and user data contained in the error corrected reproduction data is externally output from the second memory.

Abstract: An integrated circuit includes: a signal processor, which receives an input signal and generates a processed signal, representing processing information obtained by subjecting the input signal to predetermined processing, and at least one type of internal signal including internal information obtained during the processing; at least one memory storing the processing information; an interface exchanges signals with an external device; and a controller controlling the signal processor, memory and interface. On receiving a first instruction from the external device through the interface, the controller controls the signal processor and memory such that the processing information is once stored in the memory and then output to the external device via the interface. In response to a second instruction, the controller controls the signal processor and memory such that the internal information is once stored in the memory and then output to the external device via the interface.

Abstract: An address reproduction circuit for reproducing address information based on a reproduction signal which is read from an optical disc including a guide groove having a wobbling shape which represents modulated address information. The address reproduction circuit includes an A/D conversion section for converting an analog wobble signal included in the reproduction signal into a digital wobble signal; and a maximum likelihood decoding section for generating an address signal representing address information having maximum likelihood from the digital wobble signal based on a state transition rule defined by a modulation rule of the modulated address information.

Abstract: A jitter detection apparatus includes an A/D conversion section for converting an input analog signal into a plurality of discrete multiple value digital signals; a binarization section for performing binarization of the plurality of multiple value digital signals to generate a binary signal; a jitter calculation section for calculating a jitter amount based on an error between a value of a prescribed multiple value digital signal sampled at a time which is substantially the same as a time when the value of the binary signal is changed and a prescribed threshold value; a pattern detection section for detecting patterns of the binary signal before and after the time when the prescribed multiple value digital signal is sampled; and a correction section for correcting the jitter amount based on the detected pattern.

Abstract: A method for reading address information from an optical disc with a wobbled track groove includes the steps of: obtaining a sine wave address signal, a first address signal representing a first groove region with sine wave wobbled portions and an inverted phase portion, and a second address signal representing a second groove region with steep inward or outward displacements; multiplying a first reference signal, being phase-locked to, and having the same frequency as, the sine wave address signal, and the first address signal together to obtain a first multiplied signal; multiplying a second reference signal, being phase-locked to, and having a frequency twice as high as, the sine wave address signal, and the second address signal together to obtain a second multiplied signal; integrating the first and the first address signal 405, the second address signal 406 second multiplied signals separately to obtain a first integral and a second integral, respectively; and adding the first and second integrals toget

Abstract: An optical disk apparatus of the present invention includes: a light amount detection section for irradiating an information carrier with a light beam so as to detect information recorded in a data section of the information carrier, wherein the information carrier includes the data section and an address section associated with the data section, the data section is an information track formed by a land or a groove where information can be recorded or reproduced, and the address section contains address information corresponding to the information track which is recorded in the address section by one or more concave or convex pit offset by a predetermined distance from a center of the information track; an address polarity determination section for determining whether the address section over which the light beam has passed is either on an outer periphery side or on an inner periphery side with respect to the center of the information track being scanned by the light beam, based on a signal output from the li

Abstract: A deflection yoke for a single beam deflection comprises a pair of horizontal deflection coils, a pair of vertical deflection coils, a correction magnet, two sets of coil pairs connected in series with the horizontal deflection coils, a bias magnet and an auxiliary coil magnetically coupled to the coil pairs and supplied a vertical deflection current. A deflection device comprises the deflection yoke, a horizontal deflection circuit and a vertical deflection circuit. A monochrome CRT display comprises the deflection device, an video processing device and a monochrome CRT.