Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: A data arranging method for linear PCM data, which allows both low cost and high cost machines to easily perform a reproduction process and can cope with multiple channels. Data having a structure in which each sample data of 20 bits or 24 bits of individual channels is separated to a main word consisting of 16 bits and an extra word consisting of 4 or 8 bits, a collection of 2n-th main words of the individual channels is arranged, a collection of (2n+1)-th main words of the individual channels is then arranged, a collection of 2n-th extra words of the individual channels is then arranged, and a collection of (2n+1)-th extra words of the individual channels is then arranged, is recorded on a recording medium or transferred.

Abstract: A data arranging method for linear PCM data, which allows both low cost and high cost machines to easily perform a reproduction process and can cope with multiple channels. Data having a structure in which each sample data of 20 bits or 24 bits of individual channels is separated to a main word consisting of 16 bits and an extra word consisting of 4 or 8 bits, a collection of 2n-th main words of the individual channels is arranged, a collection of (2n+1)-th main words of the individual channels is then arranged, a collection of 2n-th extra words of the individual channels is then arranged, and a collection of (2n+1)-th extra words of the individual channels is then arranged, is recorded on a recording medium or transferred.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio contents and their management information. The video management information can only access the video contents. However, the audio management information can access not only the audio contents but also the video contents.

Abstract: A wave-shaping circuit which comprises a comparator for comparing the level of a signal reproduced from a magnetic tape on which, for example, PCM signals are recorded with the level of a reference signal, and a D flip-flop circuit for holding an output signal from the comparator for a prescribed period. Where the reproduced signal has a higher level than the original level of the reference signal, then the reference signal is made to have a higher level than the original level by an output signal from the D flip-flop circuit, that is, an output signal from the comparator. Where the reproduced signal has a lower level than the original level of a reference signal, then the reference signal is made to have a lower level than the original level by the output signal from the comparator. As a result, strains occurring at the high density recording are not reproduced.

Abstract: A tracking servo system for an optical-disc information reproducing apparatus includes (a) a light source for generating a light beam to scan a target track on an optical-disc wherein the information is stored as a series of pits arranged in the form of the track; (b) four photodetectors, arranged in two pairs with each pair intersecting the other and being disposed in a direction oblique to an image of the track for converting an image of the pit into respective electric signals; (c) a circuit for comparing the phases of the electric signals and for producing a tracking error signal ranging in accordance with the phase difference between the electric signals; and (d) a motor and lens for deflecting the light beam along a path perpendicular to the target track in response to the tracking error signal, whereby the light beam accurately scans the target track.

Abstract: A signal copy device for a digital record/reproduction system includes an encoding circuit for producing a first digital encoded signal corresponding to an analog audio signal. The encoding circuit is connected to a first VTR through a switch section of a switch circuit and a first digital signal processor. A second VTR reproduces and generates a digital encoded audio signal to be copied. The switch circuit is connected to the encoding circuit and the second VTR. The switch circuit includes two switch sections which operate in cooperation with each other. When a reproduction signal is generated from the second VTR, the two switch sections are switched. The reproduction signal is supplied to the first VTR through these switch sections, thus accomplishing copying.

Abstract: A processing system for reproduced audio digital signals used in an audio PCM (pulse code modulation) recording/reproducing system using a recording/reproducing apparatus such as a video tape recorder having a dropout-compensation circuit is disclosed. The reproduced signal processing system is connected to receive digital information signals reproduced through the dropout compensation circuit from a recording medium on which audio information signals are recorded in the form of digital data words and includes circuit means for detecting whether a reproduced digital signal is dropout-compensated or not and circuit means for adding an error pointer to a reproduced digital signal which is detected as being dropout-compensated.

Abstract: A method of harmonizing the impedances of an audio amplifier and a loudspeaker interconnected therewith, the audio amplifier including a line amplifier and a positive feedback circuit for compensating for the counter electromotive force of the loudspeaker. A voice coil of the loudspeaker is mechanically driven for generating an electric signal at input terminals of the loudspeaker. Then, the amplification degree of the line amplifier or the positive feedback circuit is adjusted to reduce the signal voltage between the input terminals of the loudespeaker to a minimum, during the circulation of the generated signal through the positive feedback circuit and the line amplifier.

Abstract: A signal amplifier circuit includes at least one pair of complementary junction field effect transistors serially connected in a source-to-source relationship between first and second power supply source terminals. In order to apply a reverse bias between the gate and source in each of the paired transistors, the gate bias potential of one of the paired transistors can be selected between a potential on the first power supply terminal and a potential of the commonly connected sources of the transistor pair, and the gate bias potential of the other transistor be selected between a potential at the second power supply terminal and the potential of the commonly connected sources of the transistor pair. According to this invention, direct coupling can be easily effected between amplifier stages using a common power supply source.

Abstract: A signal amplifier circuit using a field effect transistor having current unsaturated characteristics like a triode vacuum tube. The field effect transistor has drain and source electrodes coupled respectively through drain and source resistors to first and second different potential points between which a supply voltage may be applied. In the present invention the first potential point is coupled to the source electrode of the field effect transistor by an impedance means to render the signal amplifier circuit insensitive to variation in the supply voltage. The impedance means may be an active or passive element such as a bipolar transistor or resistor.

Abstract: A bootstrap driver circuit directly coupled to a complementary pushpull output circuit and including a field effect transistor with current unsaturated triode vacuum tube characteristics. The output of the pushpull output circuit is coupled to the drain and source circuits of the driver field effect transistor by means of capacitors. The present invention also discloses a predriver circuit which uses a current unsaturated type field effect transistor and can be directly coupled to the driver circuit.