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Showing papers by "Sony Broadcast & Professional Research Laboratories published in 1985"


PatentDOI
TL;DR: In the MR magnetic head of the present invention, its sensing element (2) comprises a plurality of superposed magnetic layers (4,5) having magnetoresistance effect in at least one of them and a nonmagnetic intermediate layer (3) sandwiched therebetween, and a sensing current is fed to flow in the sensing element in the same direction as a signal magnetic field applied to the element as discussed by the authors.
Abstract: In the MR magnetic head of the present invention, its sensing element (2) comprises a plurality of superposed magnetic layers (4,5) having magnetoresistance effect in at least one of them and a nonmagnetic intermediate layer (3) sandwiched therebetween, and a sensing current (i) is fed to flow in the sensing element (2) in the same direction as a signal magnetic field applied to the element. Each of the magnetic layers (4,5) is so formed as to have an easy axis of magnetization substantially perpendicular to the signal magnetic field or to have an isotropic magnetic characteristic in the magneticfilm plane, thereby avoiding generation of Barkhausen noise with certainty.

154 citations


Patent
29 Nov 1985
TL;DR: In this article, a television signal receiving apparatus with a program schedule display function is provided, which includes a tuner, a TV signal processing circuit connected to the tuner and a switch connected to a digital signal processing (DSP) circuit for selectively generating a local program schedule signal based on the Standard Time selected by the switch.
Abstract: A television signal receiving apparatus is provided having a program schedule display function. The apparatus includes a tuner, a television signal processing circuit connected to the tuner, a digital signal processing circuit connected to the tuner for generating a program schedule display signal based on program schedule data obtained through the tuner, and a switch connected to the digital signal processing circuit for selectively generating a local program schedule display signal based on the Standard Time selected by the switch.

137 citations


Patent
26 Apr 1985
TL;DR: In this article, a picture display apparatus has respective modes in which it displays at least three different types of pictures in sequence in response to actuations of a single switch, and when the switch is actuated within a predetermined time from the occurrence of a characteristic event in the respective mode, the next type of picture in the sequence is displayed.
Abstract: A picture display apparatus has respective modes in which it displays at least three different types of pictures in sequence in response to actuations of a single switch. The picture display apparatus may be incorporated within a conventional television receiver having a programmable timer, and in such case the first type of picture is the normal television picture, the second type of picture is a display of the current day of the week and current time, and the third type of picture is a display of programming information stored in the programmable timer. When the switch is actuated within a predetermined time from the occurrence of a characteristic event in the respective mode, the next type of picture in the sequence is displayed. When the switch is actuated after the predetermined time has elapsed, the first type of picture in the sequence is displayed.

124 citations


Patent
22 Mar 1985
TL;DR: In this paper, a cross-interleave Reed-Solomon code (CIRC) is used to maintain information integrity in a digital audio transmission line, which may include recording and play back from digital audio disc and error correction of the data transmitted in either direction between a user and a medium.
Abstract: Information is transmitted by a digital audio transmission line, which may include recording and play back from a digital audio disc, that includes information other than conventional two channel audio signals and error correction of the data transmitted in either direction between a user and a medium is provided. Information integrity is maintained by a first and second cross-interleave Reed-Solomon code (CIRC), in which a third Reed-Solomon code is overlaid on the CIRC code, whereby a sector is built from users words and protected by a quasi-product code, and then an encoded sector is divided into groups, which are group-wise presented to the CIRC encoder.

96 citations


Patent
19 Dec 1985
TL;DR: In this article, a coding apparatus for coding digital video data in the form of a block data to a compressed video data, comprises first detecting means for detecting a maximum value of the digital data of plural picture elements in a block, second detecting means to detect a minimum value of digital video contents of the same block, and means for generating a dynamic range information of the block from said maximum and minimum values.
Abstract: Coding apparatus for coding digital video data in the form of a block data to a compressed video data, comprises first detecting means for detecting a maximum value of the digital video data of plural picture elements in said block, second detecting means for detecting a minimum value of the digital video data of plural picture elements in said block, means for generating a dynamic range information of the block from said maximum and minimum values, means for subtracting said minimum value from each of the digital data to generate modified digital video data, means for encoding said modified digital video data with the fixed digitized bit number less than that of original digital video data, and transmitting means for transmitting the output of said encoding means and an additional code per one block formed of at least two of said maximum value, minimum value, and a signal according to said dynamic range information.

93 citations


Patent
29 Oct 1985
TL;DR: In this article, a decoder control circuit for a pay television system includes a descrambler (22, 24) for descrambling a selected video programme transmitted from a broadcast center (9), a decoded decoder (21) for receiving and decoding control data transmitted from the centre (9).
Abstract: A decoder control circuit for a pay television system includes a descrambler (22, 24) for descrambling a selected video programme transmitted from a broadcast centre (9), a decoder (21) for receiving and decoding control data transmitted from the centre (9), the control data including at least programme feed data and programme status data, an advance money memory (28) for storing money data transmitted from the centre (9), and a central processing unit (23) for subtracting a programme fee from the money data stored in the advance money memory (28) upon reception of the selected programme.

90 citations


Patent
02 Jul 1985
TL;DR: In this article, a single hand held remote control unit produces command signals used to control all operational aspects of a video tape recorder and an associated television receiver, and switches that upon actuation can provide various interconnections so that all operating modes of the two units are possible.
Abstract: A single, hand held remote control unit produces command signals used to control all operational aspects of a video tape recorder and an associated television receiver, and the video tape recorder and television receiver include switches that upon actuation can provide various interconnections so that all operating modes of the two units are possible. Actuation of the switches is performed by controllers, arranged at the particular units, and which receive the coded command signals from the remote control unit to set the switches in accordance with any of several keys that can be actuated on the remote control unit. In one aspect, depressing a single playback key at the remote control unit will produce coded signals received by the controllers to set the television receiver to an unused channel frequency and cause the video tape recorder to reproduce a prerecorded video tape, with the reproduced signal fed to the television receiver over that unused channel for display.

88 citations


Patent
23 Jan 1985
TL;DR: In this paper, a video display device consisting of a display panel which has a large number of luminescent display cells arranged in an X-Y matrix and with a common drive circuit for applying an input video signal was proposed.
Abstract: A video display device comprising a display panel which has a large number of luminescent display cells arranged in an X-Y matrix and with a common drive circuit for applying an input video signal which substantially reduces the number of drive circuits by at least a factor of two and wherein a switching circuit switches the input video signal from a first plurality of luminescent display cells to adjacent luminescent display cells at every field period of the input video signal so as to reduce at least by one half the number of drive units required in the display device.

87 citations


Patent
22 Aug 1985
TL;DR: In this paper, an apparatus for an efficient coding which reduces the number of bits per one pixel of digital television signals is described, where pixel data in the present field is predicted by way of a linear combination of the pixel data from the past several fields and parameters as prediction coefficients, and the parameters which make this prediction difference minimum are derived, and this parameter is transmitted.
Abstract: This invention relates to an apparatus for an efficient coding which reduces the number of bits per one pixel of digital television signals. The pixel data in the present field is predicted by way of a linear combination of the pixel data in the past several fields and parameters as prediction coefficients, and the parameters which make this prediction difference minimum are derived, and this parameter is transmitted.

83 citations


Patent
01 Oct 1985
TL;DR: In this article, a remote control system for remotely controlling the operation of various electronic devices consisting of a remote-control unit having a read-only memory for storing a data table, a keyboard for generating a program to be executed at a predetermined future time, a random-access memory, a central processing unit jointly interactive with the read only memory and the random access memory.
Abstract: Apparatus for remotely controlling the operation of various electronic devices comprises a remote-control unit having a read-only memory for storing a data table, a keyboard for generating a program to be executed at a predetermined future time, a random-access memory for storing the program, a central processing unit jointly interactive with the read-only memory and the random-access memory, and a transmitter controlled by the central processing unit for producing a remote-control signal based on the data table and the program. A receiver is responsive to the remote-control signal for controlling the devices in accordance therewith, and a simulator is provided for producing the remote-control signal before the predetermined future time, so that at least a portion of the program is pre-executed as a test of its validity.

77 citations


Patent
30 May 1985
TL;DR: In this paper, a disc player fitted for automatic change of discs comprises a disc pack receiving table for receiving and holding disc packs containing a plurality of discs, a disc rotating device for rotating a disc taken out from the disc pack and loaded thereon, and a movable chassis operative to move up and down in relation to the disc packing receiving table.
Abstract: A disc player fitted for automatic change of discs comprises a disc pack receiving table for receiving and holding a disc pack containing a plurality of discs, a disc rotating device for rotating a disc taken out from the disc pack and loaded thereon, and a movable chassis operative to move up and down in relation to the disc pack receiving table and provided with a mechanical arrangement comprising a sliding lever for actuating a sliding member provided in the disc pack to take a selected disc out of the disc pack, a motor for rotating selectively in the clockwise and counterclockwise directions, a driving roller for being rotated with the rotatory driving force produced by the motor to carry the selected disc taken out from the disc pack to the disc rotating device, and a driving mechanism actuated with the rotatory driving force produced by the motor for driving the sliding lever in the manner for taking a disc out of the disc pack when the motor rotates in one of the clockwise and counterclockwise directions and for driving the sliding lever to put back the same when the motor rotates in the other of the clockwise and counterclockwise directions.

Patent
09 Oct 1985
TL;DR: In this article, dampers are inserted between the frame and the movable chassis to absorb the energy of vibrations of the moving chassis, and a correcting means such as a coiled spring is arranged as to change the biasing force for changing the bias of a movable vehicle in a neutral condition with respect to the frame by adjustment operation.
Abstract: In an optical disk player according to this invention, a movable chassis mounted with an optical pickup, a turntable and the like is supported by springs joined with respective positions of a frame, and in this optical disk player, dampers are inserted between the frame and the movable chassis to absorb the energy of vibrations of the movable chassis At the same time, a correcting means such as a coiled spring is so arranged as to be capable of changing the biasing force for biasing the movable chassis in a neutral condition with respect to the frame by adjustment operation With the above arrangement, the slope of Q-value of the resonance region becomes moderate enough at the leading edge of the slope, and thus the vibration isolation characteristic is improved, so that sound omissions tend not to occur The degradation of the vibration isolation characteristic of the damper that usually occurs on tilt of the chassis is effectively prevented At the same time, a collision between the frame and the movable chassis can be prevented without increasing the movable range of the movable chassis with respect to the frame

Journal ArticleDOI
TL;DR: In this article, a transverse magnetic field over 2000G was applied to suppress turbulent convection in silicon melts and the oxygen concentration in the resulting silicon crystals could be precisely controlled within a range of.
Abstract: Turbulent convection in silicon melts used in the Czochralski crystal‐growth method was found to be effectively suppressed by applying a transverse magnetic field over 2000G. When turbulent convection is suppressed, it was found that the oxygen concentration in the resulting silicon crystals could be precisely controlled within a range of . The oxygen concentration distribution in the crystals is more uniform than that obtained by the conventional Czochralski method. As‐grown n‐type silicon crystals with a resistivity as high as 5000 Ω‐cm were obtained. Resistivity distribution along the radius of the crystals is more uniform than that produced by the floating zone method. Silicon crystals with low oxygen concentration prepared by the present method have few thermal‐induced defects, which cause the degradation of generation lifetime. The characteristics and yield of p‐i‐n photodiodes and planar‐type GTO's are superior to that obtained in wafers prepared by the floating zone method. We conclude that the Czochralski method using a transverse magnetic field is an effective method of producing high quality silicon crystals which can improve the characteristics of semiconductor devices and their production yield.

Patent
03 Jan 1985
TL;DR: In this article, an outdoor unit which includes a converter for converting super-high frequency signals received by an antenna to ultra high frequency signals, a local oscillator for generating a local signal supplied to the converter, a switch for switching the frequency of the local signal, and a detecting circuit for detecting an operating voltage supplied by the outdoor unit to the indoor unit and the value of which is changed according to a band range of the super high frequency signal.
Abstract: Apparatus for receiving super high frequency signals having an outdoor unit which includes a converter for converting super high frequency signals received by an antenna to ultra high frequency signals, a local oscillator for generating a local signal supplied to the converter a switch for switching the frequency of the local signal, and a detecting circuit for detecting an operating voltage supplied to the outdoor unit and the value of which is changed according to a band range of the super high frequency signals, the output of the detecting circuit controlling the switch, an indoor unit which includes a demodulator demodulating the ultra high frequency signals, and a circuit generating the operating voltage; and a coaxial cable supplying the ultra high frequency signals from the outdoor unit to the indoor unit and also supplying the operating voltage from the indoor unit to the outdoor unit.

Patent
25 Nov 1985
TL;DR: In this article, a method of forming a thin polycrystalline semiconductor film has been proposed, which can be used to fabricate a thin film semiconductor device with excellent electrical characteristics.
Abstract: A method of forming a thin semiconductor film has the steps of: forming a thin semiconductor film on a predetermined substrate; implanting predetermined ions in the thin semiconductor film to convert the thin semiconductor film to a thin amorphous semiconductor film; decreasing a thickness of the thin amorphous semiconductor film to a predetermined thickness; and annealing the thin amorphous semiconductor film to cause solid-phase growth. According to this method, a large thin polycrystalline semiconductor film with a crystal grain size larger than the conventional crystal grain size and a good crystal grain orientation can be uniformly formed at a low temperature. It is, therefore, possible to use such a thin semiconductor film to fabricate a thin film semiconductor device with excellent electrical characteristics.

Patent
11 Sep 1985
TL;DR: In this paper, a plurality of images superimposed to form a composite image on the screen of a television monitor are brought into convergence (register) by forming a reference image on a screen, the reference image including the plurality of reference points, and superimposing a test image with adjustment points respectively corresponding to the reference points.
Abstract: A plurality of images superimposed to form a composite image on the screen of a television monitor are brought into convergence (register) by forming a reference image on the screen, the reference image including a plurality of reference points, and superimposing a test image on the reference image. The test image is similar to the reference image and includes a plurality of adjustment points respectively corresponding to the reference points. The test image further includes at least one correction portion corresponding to a given portion of the reference image, the correction portion including a given subset of the adjustment points. An adjustment point is selected within such subset, the position of the selected adjustment point is adjusted with respect to the reference point corresponding thereto, and the positions of the other points within the correction portion are simultaneously and proportionally adjusted, thereby establishing a substantial convergence of the correction portion with respect to the given portion of the reference image. The process is repeated for other corresponding image portions as necessary to establish substantial convergence of all corresponding portions of the two images. In the same manner convergence of a third image with the first two is established.

Patent
27 Dec 1985
TL;DR: In this paper, a method and system for effecting a transformation of video image on a video screen applicable to a system for producing a special visual effect on, e.g. a television screen, in which a two-dimensional address plane (IM) is defined within a memory area, input video image is stored within the memory area.
Abstract: A method and system for effecting a transformation of video image on a video screen applicable to a system for producing a special visual effect on, e.g. a television screen, in which a two-dimensional address plane (IM) is defined within a memory area, input video image is stored within the memory area, a cylinder shaped virtual image (CYL) is placed on the address plane, a part of the address plane (iM2) is wound on the cylinder shaped image (CYL), and when the cylinder shaped image (CYL) is displaced along a predetermined direction on the address plane (IM) with a radius (r) of a circle invertical section thereof being varied with time, the address plane (IM) can be viewed as if it were turned over. If the input address data within the memory area is read out on the basis of output address data indicating the above-described displacement of the address plane (IM), the output video image on the video screen can be viewed therethrough as if the video image were being turned over.

Patent
23 Dec 1985
TL;DR: In this paper, a system and method for processing an extraordinarily large amount of data is configured using ordinary versatile computers of relatively slow data processing speed, where tasking is shared to plural computers or processors connected to a system bus; a shared storage device provided in common for these processors is made up of plural memory banks connected to the system bus.
Abstract: A system and method for processing an extraordinarily large amount of data is configured using ordinary versatile computers of relatively slow data processing speed. Tasking is shared to plural computers or processors connected to a system bus; a shared storage device provided in common for these processors is made up of plural memory banks connected to the system bus; data transferred between the processors and the memory banks are divided into a predetermined amounts of divisional data; the data are processed for each divisional data simultaneously in parallel fashion; and each memory bank is occupied simultaneously in parallel fashion in response to each memory request from each processor. An arbitrator is provided for acting on a single memory request in accordance with a predetermined priority order in the case where plural memory requests are outputted simultaneously to the same memory bank.

Patent
29 Nov 1985
TL;DR: In this article, a payment control apparatus for a pay television system includes a detector for detecting an advance fee data group transmitted from a center, and an error check controller coupled to the detector detects errors in the advance fee group.
Abstract: A payment control apparatus for a pay television system includes a detector for detecting an advance fee data group transmitted from a center. An advance memory coupled to the detector stores the advanced fee data group. An error check controller coupled to the detector detects errors in the advance fee data group. A display coupled to the error check controller displays error conditions in the advance fee data group.

Patent
27 Nov 1985
TL;DR: In this paper, a color palette unit is used to generate a limited number of colors for display on a video monitor/receiver, where the appearance frequencies of the colors relative to a plurality of picture elements contained within a specified portion of the displayed picture are calculated.
Abstract: Apparatus for processing color graphics data converts an analog video information signal to a digital signal and stores one frame of the digital video signal corresponding to a desired still picture for display on a video monitor/receiver upon being read out from the storage element. The still picture read out from the storage element is also fed to a microcomputer in which a color picture corresponding to the displayed still picture is stored in a memory so that it may be displayed on the monitor and visually compared with the original picture. The data processing apparatus specifies a portion of the displayed picture and the appearance frequencies of respective colors relative to a plurality of picture elements contained within that specified portion are counted. These appearance frequencies are used to generate a limited number of colors in a color palette unit. When defining the colors of the color palette the data in the microcomputer memory is converted to a computer graphics bit length and read out through the color palette for display on the monitor. Also, the specified area can be moved on the picture and the appearance frequencies for each of the colors in each area are accumulated, so that the accumulated appearance frequencies can be used to specify the color palette colors.

Patent
30 Oct 1985
TL;DR: In this paper, a decoder for a pay television system incorporates a receiver for receiving scrambled programming and control data transmitted from a remote location, with the control data including data corresponding to the program fee and the program status, and a manual switch for selectively descrambling the program data when the status is a pay-per-view program.
Abstract: A decoder for a pay television system incorporates a receiver for receiving scrambled programming and control data transmitted from a remote location, with the control data including data corresponding to the program fee and the program status, and a manual switch for selectively descrambling the program data when the program status is a pay-per-view program. The decoder has a storage unit for storing a credit value, transmitted from the remote location, and the decoder has timer apparatus for measuring the time during which a pay-per-view program is being received and for subtracting a program fee periodically from the value stored in the storage unit, during the time of reception of the selected program, provided the switch is operated to descramble the program.

Patent
27 Mar 1985
TL;DR: In this article, an editing video frame address representative of an editing location of the video signal and a reference frame address corresponding to a predetermined cinema frame address of the cinema signal are supplied to a circuit which then produces a relative address between the editing video frames address and the reference video frame addresses.
Abstract: Editing data producing apparatus produces first data for editing a cinema film based on second editing data obtained by editing a television video signal reproduced from a record medium on which a cinema signal is recorded in a manner of the television video signal. The video signal is obtained from the cinema signal by an m:n ratio (m and n are both integers) pull-down conversion. An editing video frame address representative of an editing location of the video signal and a reference video frame address representative of the video frame address corresponding to a predetermined cinema frame address of the cinema signal are supplied to a circuit which then produces a relative address between the editing video frame address and the reference video frame address. A circuit is provided for dividing a number representative of the relative address by a number bearing a predetermined relation to m and n, so that a remainder is detected. In response to the remainder and field data representative of a field status of the editing video frame address, the video frame address is converted to the cinema frame address.

Patent
23 Dec 1985
TL;DR: In this paper, the rotary dial is journalled on a fold-down section of the video tape recorder's front console and its manually-actuated rotation is monitored by optical sensors.
Abstract: In a multi-function video tape recorder system, a manually operable rotary dial can be used in place of a large number of dedicated manual switches, and so forth to make selections from multiple-choice lists and to assign numerical values for timing, and so forth. The rotary dial is journalled on a fold-down section of the video tape recorder's front console and its manually-actuated rotation is monitored by optical sensors. A microprocessor receives the output of the sensors and so can derive the angular position and speed and direction of rotation of the rotary dial, which may all serve as input parameters. In addition, a ring may be included in the rotary dial assembly, the ring being pivotably slightly relative to the rotary dial itself to provide an addition dimension of information input. The rotary dial can be used to input date and time information for both clock setting and timer setting operations, to select a television channel for recording or direct reception, to select the speed and mode of video playback and/or to control the rate and direction of frame advance.

Patent
29 Nov 1985
TL;DR: An improved magneto-optical recording medium and a method of making the same, the medium including a substrate base and a magneto optical recording layer formed on the base and composed of a plurality of layers each of which contains a rare earth metal and a transition metal as discussed by the authors.
Abstract: An improved magneto-optical recording medium and a method of making the same, the medium including a substrate base and a magneto-optical recording layer formed on the base and composed of a plurality of layers each of which contains a rare earth metal and a transition metal. The relative concentration ratio between the rare earth metal and the transition metal in the layers varies cyclically in the direction of the thickness of the magneto-optical recording layer. The recording medium is conveniently manufactured by simultaneously depositing the transition metal and the rare earth metal by co-sputtering the two metals on a base and providing relative movement between the base and the metal sources during co-sputtering to produce the multilayer recording structure.

Patent
24 Oct 1985
TL;DR: In this paper, the authors used identification codes to allow multiple audio tracks associated with a recorded image and to record audio signals of time length less than the allotted duration, so that a number of images can be recorded in rapid succession without waiting for each of the successive allotted audio time periods to expire.
Abstract: Audio signals that correspond with still images are recorded in an electronic still camera on the same magnetic disc as the visual images. By time-base compressing the audio signal and dividing each record track into a number of segments, ten seconds of audio can be recorded for each image without requiring a large processor memory. Identification codes are added to the time-base compressed audio to permit multiple audio tracks to be associated with a recorded image and to record audio signals of time length less than the allotted duration, so that a number of images can be recorded in rapid succession without waiting for each of the successive allotted audio time periods to expire.

Patent
12 Apr 1985
TL;DR: In this article, an apparatus for scrolling the display of images obtained from a plurality of data units, each having pattern signals representing the plurality of horizontal lines and a corresponding color signal, is presented.
Abstract: An apparatus for scrolling the display of images obtained from a plurality of data units, each having pattern signals representing a plurality of horizontal lines and a corresponding color signal includes a video display having a plurality of horizontal display lines, a first memory for storing the pattern signals formed with first addresses corresponding to the plurality of horizontal display lines and a first buffer area for temporarily storing received pattern signals, a second memory for storing the color signal formed with second addresses corresponding to the numbers of the data units and a second buffer area for temporarily storing a received color signal, the pattern signals and a corresponding color signal being stored in the first and second buffer areas, respectively. A read out system operates so that the first memory, including the first buffer area, is read out by accessing the first addresses in a pre-determined order and so that the second memory, including the second buffer area, is read out by accessing the second addresses in a pre-determined order. Also provided is a circuit for transferring the pattern signal of a horizontal line stored in the first buffer area to a corresponding address of the first memory and for transferring a corresponding color signal stored in the second buffer area to a corresponding address of the second memory, and a circuit for supplying the pattern signals and the corresponding color signal to the display tube.

Patent
19 Mar 1985
TL;DR: In this article, the taken-in image signal is divided into a plurality of areas and the information amount of the image signal was reduced for adequate encoding after taking in image signal.
Abstract: An image signal encoding system wherein image signal is directly taken in through video camera, changed to digital data, broken down into PDI basic patterns, and then converted into NAPLPS code automatically. The taken-in image signal is divided into a plurality of areas and the information amount of the image signal is reduced for adequate encoding after taking in the image signal. Usually "POLYGON" command is used as the NAPLPS code.

Patent
03 Jun 1985
TL;DR: In this article, a tuned oscillator is disclosed which comprises an active element, a resonator electrically connected to the active element and made of a magnetic material using ferro-magnetic resonance phenomenon, and a magnetic circuit for applying a magnetic field to the resonator.
Abstract: A tuned oscillator is disclosed which comprises an active element, a resonator electrically connected to the active element and made of a magnetic material using ferro-magnetic resonance phenomenon, and a magnetic circuit for applying a magnetic field to the resonator. The resonator is made of an YIG (yttrium, iron and garnet) thin film magnetic resonance element formed by a thin film forming technique and utilizes an uniform mode ferro-magnetic resonance in the YIG thin film, and operating under the application of magnetic field of the magnetic circuit.

Patent
26 Nov 1985
TL;DR: In this paper, the order of transmission of geometric codes and characteristic codes is supervised on an order table and a characteristic code table is provided for supervising the characteristic codes, with correction or rearranging of the videotex code data being effected on these tables.
Abstract: In changing or otherwise handling sequential videotex codes composed of geometric codes representing individual image areas as respective geometric drawings and also characteristic codes representing attributes of the geometric drawings, the order of transmission of the geometric codes and characteristic codes is supervised on an order table and a characteristic code table is provided for supervising the characteristic codes, with correction or rearranging of the videotex code data being effected on these tables In the case where the videotex codes are to represent an input color image, a histogram of the frequencies of occurrence of all colors represented by color data for each input color image is produced and a predetermined relatively small number n of colors having the highest frequencies of occurrence, either in the histogram as a whole, or in divisions of the histogram, are selected and each image area has assigned thereto color data representing the one of the n selected colors closest to the actual color of the image area in question

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the origin of the oval defect of GaAs layers grown by molecular beam epitaxy under various growth conditions and proposed the probable origins of the defect.