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Consumer Electronics, IEEE Transactions on

Issue 4 • Date Nov 1988

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Displaying Results 1 - 14 of 14
  • A novel bar-matrix display for Greek and English alphanumeric characters

    Page(s): 933 - 936
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (204 KB)  

    A bar-matrix layout for displaying English alphanumeric characters and Greek alphabetic characters is presented. The layout uses 14 segments and two dots (giving a total of 16 elements) and is designed so that, with selective illumination of various elements, all the numeric and alphanumeric as well as Greek alphabetic characters can be displayed along with some special symbols. The display requires only simple interfacing circuits. A 64-word ASCII character set and X- and Y-deflection waveforms for cathode-ray tube displays are also presented View full abstract»

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  • Digital IC functions with differential cascode voltage switch circuits

    Page(s): 905 - 907
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (152 KB)  

    A circuit-design technique for CMOS differential cascode voltage-switch (DCVS) circuit cells is briefly described. The cells are implemented in CMOS technology. DCVS and conventional gate logic implementations are compared. It is reported that the CMOS DCVS circuit cells require a smaller layout area than conventional gate logic. In the DCVS circuit of this example, 48% less silicon area was required View full abstract»

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  • A high-functional compact and light weight mechanism for R-DAT

    Page(s): 873 - 879
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (424 KB)  

    Digital audio tape (DAT) drive mechanisms are discussed with emphasis on the mechanical problems involved in high-precision positioning of the tape with respect to the recording head. Positioning systems used for compact disk players and a DAT drive system developed by the authors are compared. The various forces applied or induced on the recording media are considered View full abstract»

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  • Alternative modulation codes for the compact disc

    Page(s): 908 - 913
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (436 KB)  

    Examples are given to show how modulation coding for magnetic recording channels can be used to generate various codes for compact disc recording. The particular (2,10) code now used in compact discs is known as eight-to-fourteen modulation (EFM). The overall rate is 8/17, however, since three code symbols are inserted between each block of 14 code symbols to ensure that the entire sequence satisfies the (2,10) constraint (and to limit the low-frequency content of the input waveform). A brief review is given of the theory of run-length limited codes, the (2,7) code currently used in magnetic recording, sliding block (2,10) codes, and more general codes for optical recording that have higher density ratios than the currently used EFM code, while still satisfying the (2,10) constraint View full abstract»

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  • Satellite tuner integrated in a TV receiver

    Page(s): 880 - 885
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (360 KB)  

    A fully integrated satellite tuner is described that can receive all channels from European satellites transmitted using PAL, SECAM, or D2MAC. The main receiving unit is connected to two antenna amplifiers that separate the left and right signal polarizations. Two low noise amplifiers are installed at the parabolic antenna, and establish a low-loss match for different lengths of antenna cable. The receiver's input is such that, after low-pass filtering, a two-stage wideband RF amplifier is connected to a two-pole varicap tuned stripline filter, covering 950-1750 MHz and having a 3-dB bandwidth of only 70 MHz. Mixer and filtering stages connect the receiver to an FM quadrature demodulator. Layout of the chassis, audio, and video performance data are listed View full abstract»

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  • High picture quality TV receiver with IDTV system

    Page(s): 856 - 865
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1028 KB)  

    An improved definition TV (IDTV) digital broadcast receiver is described that uses three-dimensional digital signal processing with motion-adaptive Y/C signal separation and motion adaptive scanning video line interpolation techniques in order to improve the picture quality of the NTSC system circuitry in use. The receiver uses seven large scale integration chips that include 11 image field memories and 12 scan line memories. After a brief review of the function of each clip, the digital processing system is examined along with the motion adaptive Y/C separation method View full abstract»

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  • Operation of switch-mode power supply at low AC voltages

    Page(s): 917 - 920
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (268 KB)  

    A self-oscillating flyback converter circuit is presented for use as a switched-mode power supply giving a stabilized output DC voltage even if the input alternating voltage varies to a large extent. A detailed circuit analysis for the circuit and a trigger source for the driven supply in which the device operation is charted as the input voltage from zero to its rated value of 220 VAC are provided View full abstract»

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  • The prospects and possibilities of integral matricial scanning

    Page(s): 914 - 916
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (512 KB)  

    It is argued that the use of matricial scanning, at the emission and reception levels with charge-coupled device (CCD) sensors and flat panels, allows for the consideration of synchronous systems for real-time stereo television viewing without glasses or lentricular networks. A summary is given of the six major advantages in using integral matricial scanning. These are: (1) better use of the passing band by suppression of return time; (2) autoscanning and simplified synchronism; (3) the possibility of easily changing the aspect ratio of pictures without loss of definition; (4) improvement of the picture synthesis systems by projection on a wall panel; (5) the possibility of obtaining the best reduction of bandwidth; and (6) the possibility of realizing a compatible 3-D-TV system that does not require glasses View full abstract»

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  • Automatic alignment techniques for color television manufacturing

    Page(s): 886 - 893
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (400 KB)  

    A technique is proposed to align automatically a color television designed with a new family of integrated circuits that incorporate internal control registers which may be a set using a serial bus. Registers internal to the various components of the system store digital values which are converted by internal digital-to-analog converters to analog control voltages and currents. All of the registers can be modified by using a single microcomputer interface to the serial bus. A remote control receiver is available which also interfaces to the control bus. The main component of the system, a video/timebase processor integrated circuit, is a complete, highly integrated luma/chroma/deflection system with all necessary filters incorporated in silicon. The majority of the registers which are accessed for the final alignment are incorporated on this one IC. By using a video camera as the feedback element, a fast, accurate alignment of nearly all of the parameters adjusted during final factory test may be obtained View full abstract»

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  • Long-exposure video camera with digital memory

    Page(s): 866 - 872
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (368 KB)  

    A digital field memory was used in a MOS video camera imager as an electronic variable shutter to obtain variable exposure time in the range from 1/5000 to 1/2 second. A 1.5 Mb field memory was used with a 280-kilopixel MOS imager. The memory was inserted between a gamma corrector and an encoder, so that quantizing noise was minimized. An inexpensive system was developed with 6-bit digitization for both luminance (Y) and colour-difference (C-Y) signals. The same digital circuit was used for a 370-kilopixel imager by adjusting the quality limit of a field picture. It is noted that imaging at the 1 lux level is possible in the 1/2-second long exposure mode because signal charges are accumulated in the imager for multiple fields to gain sensitivity. The signal readout from the imager is then sampled and held using the digital field memory View full abstract»

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  • A CMOS decoder/driver IC for Chinese numerals

    Page(s): 929 - 932
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (524 KB)  

    The design of a 16-pin CMOS decoder/driver IC for Chinese numerals is presented. The IC was fabricated using a single layer metal 5-μm polysilicon gate p-well CMOS process technology. The die size for the chip is approximately 3.1 mm×3.0 mm. The nine outputs of this IC correspond to the segments of a proposed Chinese numeric display. Nine 970-ohm resistors are used to interface the outputs of the chip to the LEDs of the display. An off-the-shelf 14-segment LED display was used for the test evaluation, but only some of the segments are used. The circuit also incorporates a feature that allows one to blank-off the display if required View full abstract»

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  • A single chip MOS decoder IC for a video program identification system

    Page(s): 847 - 855
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (604 KB)  

    A single-chip NMOS data line decoder for the European Video Programming System (VPS) is described. Video cassette recorders with a built-in VPS receiver can record a TV program under the control of a TV transmitter broadcasting an identification code along with the actual program. The code is transmitted in TV line 16 (the European Broadcasting Union data line) during the vertical blanking interval. Biphase (Manchester II) code is used for coding the bit information. The chip contains all the analog and digital circuitry necessary to retrieve the biphase coded data directly from the composite video signal and to preprocess them from a microcontroller. A description is given of the circuit's ability to perform data slicing and timing recovery of the coded data. The 8-mm2 chip VPS decoder is fabricated using a 2.5-μm n-channel MOS process and is capable of processing signals with a sync pulse peak-to-peak amplitude of 300 mV±6 dB and a data amplitude of 500 mV±6 dB. It needs only a single 5-V power supply and consumes typically 150 mW at room temperature, including approximately 5 mW for the analog parts View full abstract»

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  • FMX mobile reception

    Page(s): 921 - 928
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (380 KB)  

    A general overview is presented of the FMX stereo broadcasting system that provides reduction of background and multipath noise without a loss of stereo separation. The FMX system reduces noise in stereo reception by compressing the stereo difference signal before transmission and expanding it to its original dynamic range at the receiver. The system uses the standard FM stereo composite format with the addition of a new subcarrier for the compressed signal. The added subcarrier is in quadrature with the regular stereo subcarrier at 38 kHz. The compression characteristic provides linear operation at a fixed gain of 14 dB over much of the program dynamic range, while at the highest modulation levels FMX program signals are attenuated to permit delivery of full modulation power for the existing broadcast service. Topics discussed include FMX operation under multipath conditions, multipath detection, and the dynamic equalization techniques used in FMX receivers View full abstract»

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  • Still video transceiver over the general telephone networks

    Page(s): 894 - 904
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (676 KB)  

    A description is given of a still video transceiver that transmits full-colour still pictures to anywhere in the world over the general world-wide telephone networks. The system uses highly efficient picture coding that compresses picture data to about 3 bit/pixel with little degradation of quality. This accomplished by the combination of discrete cosine transform (DCT) and entropy coding. Highly reliable transmission under bad telephone-line conditions is realized by the combination of retransmission and fallback techniques. Experimental results of the data compression and transmission of a standard picture by the still video transceiver system are shown View full abstract»

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Aims & Scope

The primary purpose for publishing the Transactions of the Consumer Electronics Society is to present to the membership and the engineering community in general, papers on new technology oriented to Consumer Electronics.

 

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Meet Our Editors

Editor-in-Chief
R. Simon Sherratt
School Director for Teaching and Learning, School of Systems Engineering
The University of Reading
Reading, Berkshire  RG6 6AY  RG6 6AY  U.K.
r.s.sherratt@reading.ac.uk; sherratt@ieee.org
Phone:+44 (0) 118 3788588
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