Abstract: Data read out from a disk is once written in a memory, and data is read out from memory at a rate lower than the writing rate. In a power saving mode, when data in the memory reaches full capacity, the power to a pickup, an RF amplifier, a decoder/signal processing circuit, a servo circuit, and a driver circuit for driving a spindle motor and a sending motor is turned off, thereby temporarily stopping data reading from the disk. Reading from the disk and writing into the memory resumes when power is restored before the memory is completely read out.

Abstract: An optical pickup unit is formed such that a portion on an upstream side of the air flow has a streamline shape or similar shape to the streamline shape so as to keep the air flow generated with high speed rotations of a disc-shaped recording medium away from a vicinity of an objective lens. According to this arrangement, dust contained in the air flow can be prevented from adhering to the surface of the objective lens. Moreover, the dust will not enter inside the optical pickup unit through a small clearance between a lens holder of the objective lens and a cover for the optical pickup unit.

Abstract: A label adhesion system, in which an adhesive label is adhered on an adhesive face of an article are disclosed in which label peeling is not generated in normal use and adhesive remainders can be prevented where re-adhering. In the above label adhesion system in which the first adhesion region having strong adhesiveness is provided in at least a portion of a peripheral part within the adhesion face described above, and the second adhesion region excluding the first adhesive region is set to have weaker adhesiveness than that of the first adhesion region.

Abstract: A source program is stored for every line of the source program in a source program memory. Jump commands in the language used in the program are previously stored in a jump command memory for storing jump commands used in the program. The contents of the source program memory are compared with the contents of the jump command memory, the kinds of each commands in the source program are identified, and first and second identification data are produced. The first identification data which are set for each command identifies the kind of each command, and identifies that the execution contents of commands adjacent to each other along the sequence of commands are continuous. The second identification data are set for each jump command and each command to which processing is to be jumped. The first and second identification data are stored in the identification data memory. The process flow of the source program is analyzed based on the contents of the identification data memory in an analyzer.

Abstract: The invention relates to a still picture recording apparatus for selecting and recording a desired screen of analog video signal as a still picture. The apparatus of the invention includes a still picture memory for storing digital signals for at least one screen, a delay memory for delaying a screen stored in the still picture memory by a time of a portion of one or plural screens, a change detecting circuit for detecting change in the screen by comparing the stored contents of the still picture memory and the delay memory and for detecting a large change in the screen, and a recording apparatus for recording the stored content of the still picture memory onto a recording medium, such as magnetic tape, when the screen is changed by a large amount, in response to the output of the screen change detecting circuit.

Abstract: The preferred embodiment of the present inventioin hereby offers a unique and extremely useful multi-track magnetic recording and reproducing apparatus including: a data feed-out device comprised of one or two units of data-reproducing head(s) dealing with some of a plurality of data-recording heads; a control circuit controlling the tracking operations of the data-reproducing heads in response to the output of these reproducing heads; and an azimuth control circuit controlling the deviation time of synchronizing signals in response to the outputs of these reproducing heads.

Abstract: A connector with a plug having a protruding piece and a jack for accepting it can transmit not only electrical signals but also light signals between devices connected thereby. Optical fibers for transmitting light signals therethrough are placed longitudinally inside the protruding piece of the plug and the jack includes not only electrodes for transmitting electrical signals but also a light emitting element to transmit light signals into the plug through the optical fibers or a light receiving element for receiving light signals transmitted through the optical fibers.

Abstract: A multitrack magnetic recording and reproducing device of the type, which converts analog signals into digital signals and records and reproduces such converted data by splitting onto a plurality of tracks, comprises heads for both high and low recording densities such that track pitches corresponding to them are at an integral ratio. It includes a reproducing circuit having detecting-decision making means such as multiplexers which, when information recorded by a head for lower recording density is reproduced by corresponding heads for higher recording density, is adapted to determine whether any of the outputs from these heads is incorrect.

Abstract: The preferred embodiment of the present invention hereby offers a unique and extremely useful multi-track magnetic recording and reproducing apparatus including: a data feed-out device comprised of one or two units of data-reproducing head(s) dealing with some of a plurality of data-recording heads; a control circuit controlling the tracking operations of the data-reproducing heads in response to the output of these reproducing heads; and an azimuth control circuit controlling the deviation time of synchronizing signals in response to the outputs of these reproducing heads.

Abstract: A PCM recording and reproducing apparatus record digital signals obtained by sampling and quantizing analog signals on a recording medium after adding control words, synchronizing signals, etc. to the digital signals. The PCM recording and reproducing apparatus includes means for setting sampling frequencies, means for controlling the speed of recording the signals on said recording medium so as to comply with the set sampling frequency, means for generating sampling frequency indicating codes, and means for adding the sampling frequency indicating codes to the digital signals. Accordingly, sound signals can be recorded and reproduced at various sampling frequencies by the recording and reproducing apparatus of the present invention.

Abstract: A magnetic recording and reproducing device for recording information on the tape comprises an oscillation circuit for generating a reference clock, a position information generation circuit for generating position information, a recording head means, a reproducing head means, a means for controllably moving the magnetic tape and a central control circuit so that the device can record not only a primary information such as an audio signal but also a position information on the primary information. Such recording can be effected from any position on the tape such as immediately after an earlier recorded information (after-recording) by operating a simple input means such as a keyboard.

Abstract: A PCM type record-playback system converts an analog primary signal into a digital signal by sampling and quantizing it and concurrently records it on a magnetic tape with a secondary signal for showing the tape position. The primary and secondary signals are recorded on the same track in a time-divided manner so that recording can be effected with a small number of magnetic heads and the tracks on the magnetic tape can be effectively utilized.

Abstract: An audio visual system includes an audio cassette tape player, a central processor unit, a TV screen for displaying a desired pattern in accordance with a data derived from the audio cassette tape player, and a speaker system for providing audio announcement in accordance with information derived from the audio cassette tape player. The audio visual system displays a problem and five typical answers thereto. The student introduces his answer through a keyboard unit. When, for example, an answer key 3 is actuated, the audio visual system drives the audio cassette tape player to locate a commentary suited for response to the actuation of the answer key 3 whereby the commentary associated with answer key 3 is displayed and announced.

Abstract: An audio visual system comprising a reproduction system for reproducing audio sound information and picture data information recorded on a recording medium, a speaker system for audio sound output purposes, and a color TV screen for providing a visual display in accordance with the picture data information. The picture data information comprises a pattern data and instruction commands for selecting a desired display section on the color TV screen and a desired operation mode to be conducted by the audio visual system. The operation mode can be selected from the entire screen unicolor selection mode, background color change mode, pattern color change mode, display shift mode, small letter display mode, and capital letter display mode.

Abstract: A nonrecorded section detection sensor is mounted on a sensor arm which is rotatable around a shaft, to which a drive mechanism is connected to scan the nonrecorded section detection sensor above a disc. A slit plate is fixed to the shaft to detect the rotation of the shaft, whereby the address of a nonrecorded section provided between two adjacent tracks recorded on the disc is detected. Another slit plate is fixed to a tonearm drive shaft to detect a current address of a pickup cartridge mounted on a tonearm. A control circuit functions to locate the pickup cartridge at a beginning position of a selected track through the use of information related to the addresses of the nonrecorded section and the pickup cartridge.