Showing papers by "Sony Broadcast & Professional Research Laboratories published in 1983"

Memory card having static electricity protection

Abstract: A memory card includes a card support formed by two plastic boards; a printed circuit board mounted on the card support; an integrated circuit mounted on the printed circuit board and including a memory for storing information, a central processing unit for accessing the information, and access terminals connected to the memory and central processing unit for accessing the information from the memory; a plurality of connection terminals provided on an exposed surface of the printed circuit board; a common ground discharge pattern provided on the exposed surface of the printed circuit board and separated from the connection terminals by first discharge gaps; a plurality of lead terminals provided on a non-exposed surface of the printed circuit board and connected between respective ones of the connection terminals and respective ones of the access terminals of the integrated circuit; a second discharge pattern formed on the non-exposed surface and separated from the lead terminals by second discharge gaps such that undesirable static electricity supplied to the connection terminals on the exposed surface is discharged to the respective discharge patterns through the first and second discharge gaps.

Method of making a rotary ball display device

Abstract: A method for manufacturing rotary ball display devices wherein a plurality of such balls are provided with a coating of a color different from the remainder of the ball, the ball members are coated with a thin coating insoluble in the settling medium into which they are introduced, so that upon settling into a low viscosity liquid, they form a uniform layer. A high molecular weight hardenable coating material which is soluble in the low viscosity liquid is then poured onto the coated ball members to cover the layer. Then, the low viscosity liquid is removed and the hardenable coating material is caused to harden. The thin coating is then dissolved away from portions of the ball members to leave cavity portions thereabout into which a high resistivity liquid is introduced. The resulting ball members have a refractive index on the colored layer which is substantially the same as the refractive index of the high resistivity liquid contained in the cavities.

Direct digital to digital sampling rate conversion method and apparatus

Abstract: A direct digital-to-digital rate conversion apparatus and method for converting an input signal at a first sampling rate to an output signal at a second sampling rate, said apparatus has a rate multiplier means 14 to increase the frequency of the input signal. The multiplied signals from the rate multiplied means are interpolated 16 using a nth order n-polynomial interpolator to produce the output signal.

Recursive key schedule cryptographic system

Abstract: An encryption system in which a code word is processed, byte by byte, by a Vernan type process followed by non-linear encryption techniques, all of which are repeated several times, to generate a working key schedule. This key schedule is then used in the same process to encrypt the text.

Coordinate position digitizing system

Abstract: A coordinate position digitizing system comprises a position determining plate having a plurality of first parallel strip electrodes provided on one surface of a insulating layer to form plural groups thereof each connected in common and a plurality of second parallel electrodes each having the width wider than that of each of the first electrodes and provided on the other surface of the insulating layer to extend in the direction perpendicular to the first electrodes, a detecting electrode provided to face to the surface of the insulating layer on which the first electrodes are provided and connected through a predetermined capacitance to a reference potential point for producing a signal in response to a voltage obtained thereat, driving and controlling means for supplying with a constant voltage selectively to the groups of the first electrodes one after another during a first period and also supplying with the constant voltage selectively to the second electrodes one after another during a second period, and means for producing positional data defining positions of the detecting electrode on the position determining plate in both the direction of arrangement of the first electrodes and the direction of arrangement of the second electrodes in response to the signal derived from the detecting electrode.

Driving apparatus for an objective lens

Abstract: An insertion hole is formed in an objective lens holder which receives at least a distal end of a member arranged inwardly of the holder in substantially the axial direction of a support shaft. The objective lens holder can be made thin in the axial direction of the support shaft without requiring the member to be reduced in size, and an objective lens drive device can be made thin without causing degradation of sensitivity.

Speech-recognition method and apparatus for recognizing phonemes in a voice signal

Abstract: Phoneme recognition uses the silence-phoneme and phoneme-phoneme transition spectral information rather than the phoneme information itself. The transition detector features first and second differences in level for each frequency band.

Magnetic transducer head assembly with support system therefor

Abstract: A magnetic transducer head assembly having a support member in which a magnetic transducer head mounting portion, an integrated circuit element mounting portion and a plurality of lead terminals are supported to be a unitary body by a resin mold, a multichannel magnetic transducer head element mounted on the magnetic transducer head mounting portion, an integrated circuit element mounted on the integrated circuit element mounting portion which integrated circuit element includes a reproducing or recording circuit for the magnetic transducer head element, and wiring for carrying out a predetermined electric connection between the integrated circuit element and the lead terminals.

Digital fader or like device

Abstract: A digital fader or like device having slidably operable means, such as a touch-sensitive strip, which is manually operable to different settings that are represented by a digital signal. Manual changes in the relative operating position of the slidably operable means produce corresponding adjustments in the digital signal. Display elements are selectively energized by the digital signal to indicate the relative setting of the slidably operable means.

Method for recrystallizing a polycrystalline, amorphous or small grain material

Abstract: For recrystallizing a layer of polysilicon extending over a layer of silicon dioxide on a substrate of silicon single crystal, the silicon dioxide layer is interrupted at seeding locations which are spaced apart in at least one direction and at which the polysilicon layer comes into contact with the substrate, an electron beam of generally strip-shaped cross section is impacted on the polysilicon layer where the beam is focused into a fine impact line of intense energy extending transverse to the one direction in which the seeding locations are spaced apart, the substrate and electron beam are relatively displaced in a direction transverse to the impact line so that the impact line of the beam relatively scans at least a portion of the polysilicon layer transversely to the direction in which the seeding locations are spaced apart, and the speed with which the impact line relatively scans the polysilicon layer is determined so that the polysilicon layer is subjected to zone melting at the impact line of the electron beam for growing silicon single crystals by lateral epitaxial recrystallization of the polysilicon from the seeding locations.

Method of recording odd and even words of one channel PCM signals in plural tracks

Abstract: Described is a method for PCM signal recording in which, when single-channel or multichannel PCM signals are recorded so that one-channel PCM signals are recorded in plural recording tracks, the input PCM signals of one channel are correspondingly distributed to the plural recording tracks with at least one word as a unit, and in which the distributed plural signals are subjected to an encoding operation independently of one another and are recorded on the plural recording tracks. In distributing the input PCM signals by word units, word groups consisting of a predetermined number of consecutive words are sequentially distributed to the recording tracks, or plural consecutive words equal in number to the number of recording tracks are distributed to the tracks. In encoding, the input words are separated as a function of whether the input word numbers are odd or even, and the words thus separated are subjected to time delaying or interleaving operations, after which the odd and even number words are synthesized.

Image pickup apparatus

Abstract: Solid-state image pickup apparatus, such as an MOS imager, has a two-dimensional array of picture element units each formed of a photo sensitive element and a gating element, and scanning circuits for supplying horizontal and vertical scanning pulses. The picture unit elements in turn discharge a signal charge onto vertical and horizontal transmitting lines in response to the vertical and horizontal scanning pulses. Then, a resulting signal current is used to develop an output video signal. In order to provide a strong output video signal with a good S/N ratio, a current mirror circuit, formed of an input transistor and an output transistor with first current-carrying electrodes joined together to a voltage reference point and with control electrodes joined together, amplifies the signal current. A second current-carrying electrode of the input transistor receives a constant current from a current source and also receives the signal current. The output transistor has a second current-carrying electrode connected to an output load. Another current source can be connected to the output transistor so that only AC current will flow to the output load. The output load can be a load capacitor associated with a pre-charging transistor, or can be a serial charge transfer device.

Recording/reproducing apparatus for selectively processing monaural, stereo and bilingual signals

Abstract: A system for use in recording/reproducing video and audio signals, where the audio signals to be recorded can consist of various kinds of signals such as stereo signals, bilingual signals, or monaural signals, in which the kind of audio signal that is present in the signal to be recorded is detected and a corresponding code is added to the audio signal prior to being encoded and recorded. During playback, the particular code is detected and used to control switches to select the corresponding proper audio reconverting system based on the detected code.

Cover film for color hard copy printing paper

Abstract: The present invention relates to a cover film for a color hard copy printing paper by which a colorless and transparent protective layer can be formed on a surface of a printing paper on which a color-print is made. The cover film for a color hard copy printing paper according to the present invention comprises a heat-resistant base and a cover material layer including a colorless and transparent ultraviolet ray shielding layer which is formed on the heat-resistant base, has no adhesive property for the heat-resistant base and is melted and transferred to a surface of a printing paper by heating. According to the cover film for a color hard copy printing paper, it is possible to form with ease a protective layer having small curl and high color fading protection property on a surface of a color-copied printing paper.

Apparatus for recording additional video signals in a helical scan operation

Abstract: A video signal recording apparatus of the type that records a coded audio signal through time division relative to a video signal at one extended end of each of oblique tracks formed on a magnetic tape by helical scanning. The apparatus comprises a circuit for recording a coded video signal in the track region where a coded audio signal is recorded, and a circuit for recording identification data to discriminate between the coded audio signal and the coded video signal on the magnetic tape or recording control data thereon to control playback modes of the recorded signals.

Tracking servocontrol circuits for reducing gain to avoid tracking defect in an optical reproducing apparatus

Abstract: A tracking servocontrol circuit for use in an optical reproducing apparatus comprises a signal generator for generating a tracking error signal representing a tracking error in respect of a light beam scanning the record track on a record medium from which a reproduced information signal is obtained. A servocontrol amplifier is supplied with the tracking error signal and produces a drive signal in response to the tracking error signal. The drive signal is supplied to a driving device for tracking servocontrol. A defect detector detects a variation in the reproduced information signal resulting from a defect on the recorded surface of the record medium, and a control circuit reduces the gain of the servocontrol amplifier when a predetermined detection output is obtained from the defect detector. This prevents the drive signal supplied to the driving device from being harmfully affected by the defect on the recorded surface of the record medium.

Method of manufacturing metal titanate fine powder

Abstract: A method of manufacturing metal titanate fine powder which is represented as MTiO3 wherein M is one of Ba, Sr and Ca is disclosed which includes the steps of preparing hydrolyzed compound of titanium compound and reacting the hydrolyzed compound of titanium compound with water soluble metal salt of one of Ba, Sr and Ca in an aqueous alkaline solution having pH not less than 13.

Method and apparatus for compensating for tape jitter during recording and reproducing of a video signal and PCM audio signal

Abstract: Apparatus for recording and reproducing an information signal comprised of a video signal and an audio signal in a plurality of successive tracks on a magnetic tape, includes a recording section comprised of a PCM processor which converts the audio signal to a PCM audio signal and compresses the same, a dummy signal generator for compensating for tape jitter by generating a dummy signal and supplying the same to the PCM processor where the dummy signal is added both before and after each portion of the compressed PCM audio signal to be recorded in an overscan section of each track, and a magnetic head assembly which records the video signal in a main section of each track and each portion of the compressed PCM audio signal and dummy signal added thereto in the overscan section of each track; and a reproducing section comprised of a magnetic head assembly which scans the tracks to reproduce the information signal recorded therein, a switch assembly which separates the video signal reproduced from the main section of each track and the PCM audio signal reproduced from the overscan section of each track; a PCM processor which converts the PCM audio signal to the original analog audio signal and a timing signal generator for compensating for tape jitter by enabling the PCM processor only during a period slightly greater than the period of the PCM audio signal recorded in the overscan section of each track.

Thermomagnetic recording and reproducing system

Abstract: A thermomagnetic recording and reproducing system for use in optical magnetic disc apparatus wherein at least a first layer (1) of soft magnetic material having an easy axis of magnetization normal to the layer surface, a transparent non-magnetic intermediate layer (2), a second layer (3) of soft magnetic material having an easy axis of magnetization normal to the layer surface and a metal film or semi-metal film (4) adjacent to the second magnetized layer are superposed on one another to form a recording medium (5) In recording, a bias magnetic field is applied to the first and second magnetized layers (1) and (3) so that the magnetized layers are magnetized to have a single magnetic domain over their whole surfaces and a magnetization directed perpendicular to the layer surface Then, a light pulse having a first wavelength of, for example, a relatively short wavelength and of which optical absorptance in the magnetized layer is relatively high is made incident on the single magnetic domain of the first magnetized film (1) to form a cylindrical magnetic domain magnetized in the direction opposite to the magnetization direction by the applied bias magnetic field, thereby recording information bits on the first magnetized layer (1) A light pulse having a second wavelength of, for example, a relatively long wavelength which passes through the first and second magnetized layers (1) and (3) is made incident on the single magnetic domain of the second magnetized layer (3) to form a cylindrical magnetic domain magnetized in the direction opposite to the magnetization direction by the applied bias magnetic field The information is read out from the medium (5) on which the recording was made as above by utilizing the magneto optic effect

Time base correcting apparatus

Abstract: A time base correcting apparatus is disclosed which is capable of correcting time base errors contained in a digital signal supplied thereto in the form of successive data blocks with each data block including plural data words. Each data block includes therein at least plural data words and a block address circulating with a predetermined phase relation relative to a certain reference signal. A memory is provided, having plural addressable storage locations, each adapted to store a respective data block. A write-in address to identify the particular storage locations is generated according to data block addresses and read-out addresses. The write-in address is varied by a lock phase mode signal indicative of a phase relation at which an incoming digital signal is locked to a reference signal so that notwithstanding the phase mode in which the digital signal is locked to the reference signal, the correction ability of the time base correcting apparatus can be prevented from being lowered.

Solid state image pick-up devices

Abstract: A solid state image pick-up device comprises a matrix of first and second photo-sensitive elements, vertical shift registers disposed parallel to each other to shift charges from the first and second elements, respective transfer gates between each first and second element and the adjacent vertical shift register, and a horizontal shift register connected to one end of each of the vertical shift registers. An optical shutter is controlled such that the first and second elements are simultaneously exposed to incident light, and a system controller controls the transfer gates and the vertical and horizontal shift registers whereby equal predetermined maximum intervals are available for charging each of the first and second elements, the predetermined intervals being at least two frame periods long, but the starting time for charging for the first and second elements being relatively shifted by a predetermined interval, and reading of the signals from the first and second elements being performed sequentially in a frame period subsequent to closure of the shutter.

data reading device for data processing apparatus

Abstract: In a data processing apparatus, a device for reading data stored in a card is provided with a housing having a slit through which the card can be manually inserted and engaged by guides within the housing for movement in a predetermined path to an operative position, a slider member movable within the housing and having a portion interposed in the path of the card so as to be engaged by the latter and moved thereby, against the force of at least one spring, from an initial position to a displaced position upon insertion of the card through the housing slit to its operative position, a lock assembly engageable when the card is inserted to its operative position for holding the slider member in its displaced position against the force of the spring, and a lock release for disengaging the lock assembly and thereby permitting the spring to return the slider member to its initial position during which the card is propelled outwardly through the housing slit. A roller urged against the guided card within the housing frictionally resists separation of the card from the slider member when the latter is held in its displaced position and also during return of the slider member to its initial position. A muting circuit is made operative as the card moves to and from its operative position in which conductive terminals connected through a printed circuit with one or more data storage elements on the card are engaged with respective contact elements within the housing.

Method for data transmission

Abstract: In the recording/reproducing of digital audio signals, errors are detected and corrected by using two parity words, one arranged at the center of the block formed of data words and the arranged at one end of the block. The probability that uncorrectable error will be present in the center of the block is relatively high, so placing the parity word there prevents loss of the more valuable data. Maximum correctable burst errors are determined by the length of the block, so placing the other parity word on the end of the block lengthens it and improves burst error correction. The parity words are arranged as indicated before adding a cyclic redundancy check (CRC) code to the data signal and then modulation coding the signal before recording. During playback, the reproduced signal is demodulated and the CRC code used to detect errors for which error pointers are generated. The reproduced data is read into memories (3,4) in accordance with generated addresses and the pointers prevent the writing in of words found to be in error, which error words are subsequently corrected if possible using parity codes originally encoded into the signals prior to recording.

Method and apparatus for encoding a digital signal with a low DC component

Abstract: A method and apparatus are provided for encoding an n-bit information word into an m-bit code word, n≧2 and m>n, wherein the DC component of successive code words is minimized. The digital sum variation (DSV) of a plurality of preceding m-bit code words is used to determine which of, for example, two m-bit code words should be generated to represent the n-bit information word to be encoded. The m-bit code word whose disparity, when combined with the digital sum variation, reduces the digital sum variation towards zero is selected.

Video signal recording apparatus

Abstract: A video signal recording apparatus of reduced size for portability combines a video camera and helical scan video tape recorder in a single unit, in which the reduced size is obtained in part by having a tape guide drum of reduced diameter, which requires a tape wrap angle greater than the conventional 180° and employs a pair of rotary tape heads that are arranged close together relative to the diametrically opposed conventional head arrangement The timing of the heads in recording the fields of the video signals as tracks is controlled by a vertical synchronization signal having pulses that are delayed to account for the finite distance between the two rotary heads The vertical sync signal then has a different time period for a first field than it does for a second field of one frame of the video signal The camera has an image pickup portion that is caused to be scanned by the same synchronization signals utilized in the recording operation This permits any horizontal overscan to occur at a time when the heads are off the tape and by adjusting the time base of the vertical sync signal the overscan can be arranged so that the portion of it is above and below the effective portion of the image pickup portion of the camera

Apparatus for re-recording a digital signal on a record medium and for reproducing the same therefrom

Abstract: An apparatus for re-recording a new digital signal in a track on a magnetic record medium which has a previously recorded digital signal in the track, the digital signal being arranged in data blocks each containing a sync signal, a data signal, an error correction code signal, and an error detection code signal, comprises a reproducing circuit which reproduces each digital signal recorded on the magnetic record medium, a code generating circuit which supplies a discriminating code signal for each of the data blocks, and a recording circuit which re-records the new digital signal and the respective discriminating code signals in the track on the magnetic record medium

Method and apparatus for error correction

Abstract: A method of error correction comprises error correction coding processing and interleaving and de-interleaving processings for digital subcoding data (as opposed to main data) in subchannels (as opposed to the main channel) to be transmitted. Apparatus is provided comprising means for performing those processings. The method comprises the steps of dividing digital subcoding data in one PACKET into a plurality of PACKs; adding a first redundant code for error detection or error correction to each of the PACKs; and interleaving the digital subcoding data in each of the PACKs and the first redundant code; whereby the interleaved data is transmitted together with frame sync signals and main data. The data in the subchannels is coded and interleaved and then recorded so that the distances between the data are maximized. Therefore, if errors should occur, the interpolation can be properly done, thereby improving the error correcting ability without requiring complicated error correction circuit or large buffer memory such as those required for the data in the main channel.

Thermal head driving system

Abstract: A thermal transfer printing system for printing data on a medium employing a plurality of aligned heat elements has a memory for receiving data and a driver for driving or energizing selected ones of the heat elements to print the stored data in a timed sequence which prevents preheating of certain heat elements. In one arrangement, upon driving the heat elements, every other heat element is first driven or energized to print the respective data, and then the remainder of the heat elements are driven. After all heat elements are energized according to the data to be printed, a stepping motor is actuated and the medium is advanced in preparation for printing a next line of data.

Remote control apparatus

Abstract: OF THE DISCLOSURE Remote control apparatus for controlling a number of equipment in which each unit includes a microprocessor which produces a first remote control signal on its data bus line and an interface circuit including a first latch circuit which receives the first remote control signal from the data bus line of the microprocessor and a second latch circuit which receives a second remote control signal on its input terminal and transfers the second remote control signal to the data bus line of the microprocessor, a common input/output terminal receives the first and second remote control signals and a switching means is connected between the common input/output terminal and a reference point such as ground and the switching means is controlled by the first remote control signal to pass it to the common input/output terminal. .. .. .. . . .. ... .. .. ..

Television receiver for demodulating a two-language stereo broadcast signal

Abstract: Apparatus for demodulating a multiplexed sound signal comprised of a first sound signal formed by the sum of a left channel signal and a right channel signal in a first language, a second sound signal formed by the difference of the left channel signal and the right channel signal, and a third sound signal in a second language, comprising a single demodulation circuit for producing either the second sound signal or third sound signal in response to the multiplexed sound signal; a selector switch for selectively changing the center frequency of the demodulation circuit to control the latter to produce either the second sound signal or third sound signal in response to the multiplexed sound signal; a matrix circuit for producing a stereo sound signal in response to the first and second sound signals; a pair of output terminals; and a switch device for supplying the third sound signal as a second language monaural sound signal from the demodulation circuit to one output terminal when the selector switch controls the demodulation circuit to produce the third sound signal and for supplying the stereo sound signal to both output terminals from the matrix circuit as a first-language stereo signal when the selector switch controls the demodulation circuit to produce the second sound signal.