Abstract: In order to eliminate crosstalk and to provide a high recording density, a method for recording information on a recording disc includes a first step for forming a first portion of recording tracks in which the information signal is recorded on the recording disc under a condition that the angular velocity of rotation of the disc is constant and a space between each track has a first constant value. A second step in values forming a second portion of recording tracks in which the information signal is recorded on the recording disc under a condition that the angular velocity of rotation of the recording disc is varying and the space between each track has a second constant value that is greater than the first constant value. The first and the second portions of the recording tracks are formed alternately.

Abstract: In order to eliminate a crosstalk component of the reproduction signal and to provide a high level of recording density, a method for recording an information signal having a synchronizing signal on a recording disc comprises a first step for forming a first portion of recording tracks in which information signal is recorded on the recording disc rotated at a constant angular velocity of rotation so that positions of the recording tracks in which the synchronizing signal is recorded are aligned in radial directions of the recording disc, and a second step for forming second portions of recording tracks in which the information signal is recorded on the recording disc under a condition that the angular velocity of the rotation thereof is varying, wherein the first and second portions of the recording tracks are formed alternately.

Abstract: A time axis correction device for a recording medium player such as a video disc player, which device corrects the time axis of at least one component signal of a plurality of component signals contained in a multiplex information-carrying signal which is picked up from a recording medium, in accordance with an error between a reference signal and a pilot signal separated from the multiplex information-carrying signal, so that the time axis correction operation is performed stably.

Abstract: In a video and/or audio disc information reproducing apparatus in which the video and/or audio information carried on a video and/or audio disc is picked up with a beam of light incident on the disc to trace the record track on the disc, an error detecting system comprising optical means to emit a beam of light for tracing the record track and producing a signal-carrying beam of light carrying signals picked up from the record track, beam-splitting means to split the signal-carrying beam into two component beams, light-sensitive transducer means responsive to the component beams and having at least four discrete light-sensitive surfaces separate from one another across a first junction line parallel with a line tangent to the record track and a second junction line parallel with a line perpendicular to the record track, the transducer means being operative to produce a first error signal representative of the difference between the intensities of light incident on the light-sensitive surfaces separate from ea

Abstract: A dropout compensation circuit includes a low-pass filter and sequential first and second buffer amplifiers. Between the buffer amplifiers is arranged a switch which is opened in response to dropout detection, and a capacitor for holding the input voltage. A feedback circuit is connected between the output of the second buffer amplifier and the input of the first buffer amplifier, which may include a switch or a feedback resistor.

Abstract: A time axis correction device for treating a signal having a time axis fluctuation, such as a color video signal reproduced from a video disc, includes a phase modulation network whose phase transmission characteristic is dependent on the phase error of the input signal while the amplitude transmission characteristic is constant.

Abstract: A cross-talk detecting device to be incorporated in an information-carrying disc player for detecting an error component appearing within a preselected or predetermined constant frequency period at which the modulating signal has a certain constant frequency corresponding to, for example, a gray level in a video signal.

Abstract: A time base correction device for use with a video disc reproduction system corrects the time base of the color video signal according to the phase difference between a reference signal and a color burst signal; and the time base of the audio signal is corrected according to the phase difference between a reference signal and a horizontal synch signal extracted from the video signal.