Matsushita Electric Industrial Co., Ltd.

Omron Corporation

Tetsuo Maeda

Yoshiaki Igarashi

Nobuyoshi Yokobori

Masayuki Kozuka

Hiroshi Yasuda

Masataka Minami

Kenji Tagawa

Koichi Imanaka

Tetsuo Tomimoto

Jiro Yamada

Ryo Akiyama

Kouji Arii

In a data conversion apparatus of a copyright protecting system, a data format judging portion judges whether or not the data is of a super distribution format, attribute information obtaining unit identifies the audio contents of the data and obtains the attribute information corresponding to the identified audio contents from the external equipment via the data transmission/receiving portion; and a data format conversion portion converts the audio contents together with the obtained attribute information to the super distribution data format to be supplied to an external recording apparatus.

Data conversion apparatus and method in copyright protecting system

An optical-disk playback apparatus is disclosed which plays back an optical-disk on which control programs defining the operations of the optical-disk playback apparatus and other information are recorded. Such optical-disk playback apparatus is operable by a combination of an optical-disk, such as a laser disk or CD, and printed materials on which barcodes are printed. Predetermined programs are recorded defining the operation of the optical-disk playback apparatus corresponding to the barcodes. As a result, variable, complex and yet flexible optical-disk playback operations which are not fixed at the initial system designing stage can be accomplished by simply tracing the printed barcode. The operation of the optical-disk playback apparatus is controlled by the control programs recorded in the optical disk. Difficulties which might occur when an optical-disk and barcode of different systems are combined can be prevented since a one-to-one correspondence between the barcode and the optical disk code is established beforehand.

Optical-disk playback apparatus, method of optical-disk playback and

A video disk playback apparatus for playing back video image information recorded on a disk, such as a laser disk. The information recorded in the disk is read out as playback signals, which are separated into an analog composite video signal, digital data and digital audio data. The analog composite video signal is either directly reproduced as a moving picture, or is converted into digital composite video data and stored in a video data memory. On the other hand, the digital data is converted into digital video data having the same format as the digital composite video data and is stored in the same video data memory as the digital composite video data. The digital data being read out from the disk, such as track number and frame number, are converted into a format that can be recorded into the video data memory, and hence the video data memory for storing the digital composite video data can be shared, so that a memory circuit for the digital video data is not needed. It is also possible to cope with the case of recording a large capacity of digital data such as graphic data and still pictures onto a video disk.

Video disk playback apparatus

An optical toothbrush used for medical treatment comprises a plurality of narrow fibers connected to a light generating device and extending through a brush base, wherein the fibers are bent to form an L-shape and project outwardly from the base to form a brush. Light emitted from the light generating device is guided into each fiber at its base and projected through the brush tips to provide oral hygiene.

Optical toothbrush and method of use

A control system for a linear tracking arm in a record player. A signal representative of a tracking error angle of the arm is, after A/D conversion, supplied to a microprocessor for producing a control signal which controls an arm drive device so that the tracking error angle constantly remains zero. For invalidating an offset quantity possibly produced in the output of a tracking error angle detecting sensor due to changes in the characteristic thereof, a signal produced by the sensor when the arm is lifted in precedence to the playback operation is stored in a memory of the microprocessor. During the playback, the tracking error angle is detected with reference to the stored value. An average moving speed of the arm is measured for discriminating transient increasing in the speed of the arm caused by eccentricity of the disc from the increasing of the speed caused by the arm entering a lead-out groove of the disc.

Apparatus for controlling linear tracking arm in record player

A differential output circuit for generating a bipolar DC current for an armature winding without requiring a bipolar power source. A combination of transistors and resistors are utilized to effectively apply a bipolar driving current. The use of only transistors and resistors in the differential output circuit enables its easy implementation as an integrated circuit.

Differential output circuit

A drive system for a brushless dc motor to control the magnitude of the torque of a motor which has permanent magnet rotor and Hall generators. Multipliers determine the magnitude of current to each phase armature winding so as to determine the current sharing rate among the armature windings according to the rotation angle of the rotor, whereby degrading of torque uniformity due to variation of Hall generator characteristics is avoided. Each multiplier multiplies 2 signals, one being the output of the Hall generator, the other being the difference between the torque control input and the fed back signal of total armature current. Also a torque direction input is supplied to each multiplier to determine the direction of the rotational torque.

Growing community of inventors

Osaka, Japan

Tetsuo Maeda