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Consumer Electronics, IEEE Transactions on

Issue 4 • Date Nov 1994

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Displaying Results 1 - 25 of 27
  • A user interface for Home Net

    Publication Year: 1994 , Page(s): 897 - 902
    Cited by:  Patents (39)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    This paper describes a user interface for networks in the home. The main idea is to develop a user interface with high acceptance by the user and flexibility. This user interface is based on a network we call Home-Net but can obviously be employed with any other Home System like the European ESPRIT Home System, the American Consumer Electronics Bus (CEBus) and the Japanese Home Bus System (HBS) View full abstract»

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  • Channel equalization techniques for HDTV systems

    Publication Year: 1994 , Page(s): 903 - 912
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (700 KB)  

    Channel equalization techniques for full-digital high definition television (HDTV) systems are investigated. Conventional equalization methods are surveyed and a variable step size least mean square (VS-LMS) algorithm using the simple time constant concept is proposed. Several equalization techniques for HDTV systems are simulated for various channel models, and their characteristics are analyzed. Also the simulation results of the equalizer using fixed-point operations are shown View full abstract»

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  • A PC-controlled multiple window display card for TV

    Publication Year: 1994 , Page(s): 869 - 878
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (468 KB)  

    The development of a personal computer (PC)-controlled multiple window display card for television is described. A digital encoder card for converting the red, green and blue (RGB) signals from the PC to a composite video signal (CVBS) is designed and developed. This digital encoder card accepts the RGB analog signals from the computer VGA display adaptor card and converts them into a PAL or NTSC format composite video signal. A chroma keying circuitry, to enable an additional video signal to be displayed with the encoded CVBS signal on a television screen in a picture-in-picture format is also included View full abstract»

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  • Performance evaluation of a DSP-based teleconferencing system

    Publication Year: 1994 , Page(s): 957 - 962
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB)  

    Simulation and real time results associated with acoustic and line echo cancellation for a full-duplex teleconferencing system are presented. Both broadband (conventional) and subband finite impulse response (FIR) adaptive acoustic echo cancellers are considered. In subband scheme, quadrature mirror filters (QMF) are employed in order to construct an eight subband acoustic echo canceler. The normalized mean square (NLMS) is employed for updation of adaptive filter coefficients. Real time digital signal processing is conducted on a floating-point DSP chip in order to assess the dB cancellation of acoustic echo and line echo cancellers View full abstract»

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  • Design and implementation of a desktop computer supported cooperative work system

    Publication Year: 1994 , Page(s): 827 - 835
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (776 KB)  

    Describes the implementation of a desktop CSCW (computer supported cooperative work) system using commercially available consumer electronic devices and facilities. The system is developed on workstations under UNIX and OPEN LOOK environments connected by FDDI (fiber distributed data interface) networks. It provides multiparty conference with shared white board. Shared text editor, calendar, and voting capability. Each conference with these features can support a groupware environment. The design and consideration of the framework of the system is presented. During the implementation, some performance issues such as error control, medium synchronization and throughput improvement are also discussed View full abstract»

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  • An alternative modulation scheme in digital television for terrestrial broadcasting (DTTB)

    Publication Year: 1994 , Page(s): 913 - 919
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (460 KB)  

    A particular use of a coded-OFDM with guard-interval (ICOFDM), to provide transmission with one enhanced definition (EDTV) or two standard definition (SDTV) TV signals in a 7 MHz bandwidth channel, is illustrated in the present paper. Frequency arrangements of the RF channel and TV filters features are also suggested. Digital communications using conventional 8PSK signals and standard receiver techniques might have high bit error rates in a Rayleigh fading environment for the inability to track absolute phase during fades. Differential encoding can reduce this false phase locking problem. To combat this problem a differential encoding scheme is used combined with a constellation called “star QAM”. The study starts of by assessing the performance results of an 8PSK star system carried out by computer simulation on a selective Rayleigh channel with different spread delay values, for an ICOFDM system, using BCH block code (127, 106, 3) View full abstract»

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  • A study of digital Y/C separation in NTSC or PAL color television

    Publication Year: 1994 , Page(s): 963 - 968
    Cited by:  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (364 KB)  

    It has been considered very difficult to perform digital Y/C separation of NTSC or PAL signals completely because Y and C signals occupy accurately the same spectrum under 2 or 1 dimensional certain conditions. This paper examines the conditions about the three-dimensional digital Y/C separation filters and scene change detectors to control these filters for more complete Y/C separation View full abstract»

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  • Image compression using hybrid neural networks combining the auto-associative multi-layer perceptron and the self-organizing feature map

    Publication Year: 1994 , Page(s): 796 - 811
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1020 KB)  

    A new image compression technique is presented using hybrid neural networks that combine two different learning networks, the auto-associative multi-layer perceptron (AMLP) and the self-organizing feature map (SOFM). The neural networks simultaneously perform dimensionality reduction with the AMLP and categorization with the SOFM to compress image data. Two hybrid neural networks forming parallel and serial architectures are examined through theoretical analysis and computer simulation. The parallel structure network reduces the dimensionality of input pattern vectors by mapping them to different hidden layers of the AMLP selected by winner-take-all units of the SOFM. The serial structure network categorizes the input pattern vectors into several classes representing prototype vectors. Both the serial and parallel structures are combinations of the AMLP and SOFM networks. These hybrid neural networks achieve clear performance improvement with respect to decoded picture quality and compression ratios, compared to existing image compression techniques View full abstract»

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  • A system for real time extraction of image outlines

    Publication Year: 1994 , Page(s): 890 - 896
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (360 KB)  

    A system for extracting image outlines at the television rate was developed. The system incorporates fourteen DSPs operating in parallel. The extraction is performed by applying a (3×2) mask which is the connection of a (2×1) smoothing mask and a (2×2) differentiating mask. The processing time of 32.7 ms/frame for an image with 512×512 pixels×8 bits is attainable View full abstract»

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  • On the application of sequence estimation algorithms in the digital compact cassette (DCC)

    Publication Year: 1994 , Page(s): 992 - 998
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (644 KB)  

    In the current digital compact cassette (DCC) recorder, a straightforward threshold detection scheme is applied which does not exploit the distance properties of the 8-to-10 modulation (ETM) code. More advanced detection schemes are investigated to see if they improve system performance. Two soft decision sequence estimation algorithms are considered: a fully-fledged Viterbi algorithm realizing maximum likelihood sequence estimation (MISE) and a suboptimal trellis detection algorithm. With either of the algorithms, an asymptotic gain of 3 dB versus threshold detection level in the presence of additive white Gaussian noise (AWGN) is expected. The suboptimal detection algorithm is based on the running digital sum (RDS) trellis underlying the ETM code. Performing the suboptimal algorithm requires a minimum of 48 additions, 19 comparisons, and a single table look-up for both detection and decoding of an ETM codeword, versus a minimum of 4234 additions, 421 comparisons, and 423 table look-ups for the fully-fledged algorithm. Compared to the fully-fledged scheme, the suboptimal algorithm leads to a large reduction in computational complexity. The performance of either of the algorithms in the presence of AWGN is determined by means of a computer simulation. The fully-fledged Viterbi algorithm achieves a gain of about 2.3 dB versus threshold detection level for symbol error rates in the order of 10-4 to 10-5 View full abstract»

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  • A PC driven HF broadcast receiver concept for enhancing the use of the HF broadcast bands

    Publication Year: 1994 , Page(s): 951 - 956
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (420 KB)  

    Shortwave communications bas been experiencing a resurgence of interest in the past few years, not only for traditional services such as broadcasting, but also for other new mobile and fixed services. The impetus behind such interest is attributed to advances; in semiconductor technology, which may be exploited to improve the performance and reliability of different services. Using this philosophy, the paper describes a new concept, using the ubiquitous personal computer to enhance the operation of an HF broadcast receiver, it also gives an opportunity to support other technical and operational features for an improved future HF broadcasting service View full abstract»

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  • A new buffer control strategy for image data compression

    Publication Year: 1994 , Page(s): 932 - 937
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    In video coding, a rate buffer control strategy is important. The paper introduces a new rate buffer control using a nonlinear relationship between the buffer occupancy and the quantization step size. A piecewise linear relationship is also considered to obtain a better utilization of buffer. The strategy is implemented on H.261 in simulation. In simulations, it was shown that a better SNR ratio can be obtained by the proposed strategy View full abstract»

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  • AM dual mode receiver

    Publication Year: 1994 , Page(s): 927 - 931
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB)  

    The necessity and realization of an AM dual mode radio is discussed. The topic is discussed as a consequence of the resolution of WARC in 1987 that HF broadcasting services are going to be switched to SSB broadcasting after 2015 View full abstract»

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  • Progressive image transmission of variable block-size coding

    Publication Year: 1994 , Page(s): 836 - 841
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (420 KB)  

    The paper presents a new frontier for progressive image transmission. By applying the segmentation technique, adaptation of the pyramid structure can be improved. This method concatenates an image into a group of diverse sizes depending on its region's activity. The result is an intermediate approximation displaying an improved image. From the simulation results, the relative quality of intermediate image reconstructions, based on this proposed method, is superior to those of the existing ones, both in terms of its subjective and objective criteria View full abstract»

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  • The application of fuzzy logic to JPEG

    Publication Year: 1994 , Page(s): 976 - 984
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (488 KB)  

    To achieve the efficiency and automatic control, a fuzzy controller to incorporate with the JPEG lossy model is proposed. The simulation results based on USC 15 pictures indicate that this JPEG model equipped with the designed fuzzy controller is insensitive to the given initial input values, that is, (with the help of fuzzy controller) this JPEG can always find the proper values of inputs for desired distortion ratio even though the relation of input parameters and the output distortion ratio is not known. In addition, the effect of different defuzzification techniques to accuracy and convergence speed is studied as well View full abstract»

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  • A new GCR signal and its application

    Publication Year: 1994 , Page(s): 852 - 860
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (516 KB)  

    The multipath reception of television image, commonly referred to as ghost, is a widespread problem. The successful implementation of a ghost canceling system requires that the transmitted video signal contains a training signal called a GCR signal. By comparing the received distorted GCR signal with a stored reference GCR signal, the receiver can configure an appropriate channel compensating filter to cancel the distortion introduced in the transmission path. The joint development group in Korea developed a Korean standard GCR (KGCR) based on the ternary sequence and carried out computer simulations and the laboratory and field tests View full abstract»

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  • Development of a distributive lighting control system using Local Operating Network

    Publication Year: 1994 , Page(s): 879 - 889
    Cited by:  Papers (4)  |  Patents (28)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (668 KB)  

    The Local Operating Network is a technology that allows intelligent devices (or nodes) such as actuators and sensors, to communicate with one another through an assortment of communication media using a standard protocol. Both distributed and peer-to-peer communications are supported between the nodes in the network and a central control system or a file server is not required. In addition, the relatively high data rate and the availability of routers permit large amount of nodes to be tapped onto a network domain while at the same time maintain high communication efficiency. Consequently, it is suitable for developing low-cost consumers and professional communication products that can be widely applied in automating buildings, factories, vehicles, home and domestic appliances. In this paper we have reported on the development of a distributive control lighting system using the LON technology. The nodes in the system (i.e. lamps, switches and the central control units) are tapped onto the network bus and are linked by logical bindings instead of complicated hardwire connections. The system we have designed is economical to build, easy to service, modify, and provides reliable communication between the lamps and the switches. These attractive features demonstrate the feasibility of using LON in building distributive control networks, as well as the potential of our lighting system in practical applications View full abstract»

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  • A new audio-visual control using message object transmission

    Publication Year: 1994 , Page(s): 920 - 926
    Cited by:  Papers (4)  |  Patents (21)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (428 KB)  

    This paper presents a method for controlling audio-visual (AV) devices using message object transmission. The validity of the new method is verified using a trial model. This method realizes system software for performing processes like startup, control and display using the object-oriented concept. A control object is transmitted from an AV terminal device to another AV terminal device when they are connected. For startup or control, the first AV terminal does not use a control code as was done in the conventional control of AV terminals. Instead it transmits a message object corresponding to a control object which has been transmitted in advance. The advantages of using this method include the following: (1) it is possible to absorb the differences between devices, for instance the difference in control codes; (2) users need have no knowledge about the device drivers; and (3) the memory capacity required to control the AV controllers can be minimized. Furthermore, if the AV terminal's control microcomputer has an RPC (remote procedure call) function, it is possible to control the AV terminals in a distributed network environment. This can be done by sending a procedure call to the AV terminal device in the form of a message to startup the object in the AV terminal device View full abstract»

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  • Pyramidal multiresolution source coding for progressive sequences

    Publication Year: 1994 , Page(s): 789 - 795
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (552 KB)  

    A hierarchical video source coding algorithm based on MPEG-2 is presented. The proposed coding scheme is characterized by (i) non-interlaced pictures for each layer; (ii) hierarchical motion estimation able to provide physical motion vectors for both “B” and “P” pictures; (iii) hierarchical spatial scalability-which is the main feature of a system for a multiresolution MPEG-2-like coding architecture-without any increase in the total bit rate. Several alternative solutions are proposed and evaluated View full abstract»

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  • A low-cost desktop videoconferencing codec: an adaptive Motion-JPEG design

    Publication Year: 1994 , Page(s): 944 - 950
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (488 KB)  

    An adaptive Motion-JPEG coding scheme is proposed for desktop videoconferencing. The H.261 and Motion-JPEG are two commonly used codecs for videoconferencing. But, they have their own drawbacks. The problem of the H.261 is that it is computation intensive, and a special hardware is required as a result. The cost of an H.261 codec is so far too expensive to be accepted by desktop users. The Motion-JPEG is a low-cost choice for videoconferencing. But, its coding efficiency is not as good as the H.261 because temporal redundancy is not removed. In the proposed design, we try to take advantage of both H.261 and Motion-JPEG. The blocks are classified into two categories: the background and the motion. The motion blocks are coded in the same way as Motion-JPEG. The method of coding the background blocks is basically similar to the H.261 except that two techniques are employed such that its computation has the same order as that of the Motion-JPEG. The performance of the Motion-JPEG and adaptive Motion-JPEG was investigated by conducting several experiments. It is shown that the presented scheme improved the picture quality by about 2 dB for a bit rate of 1.15 Mbps View full abstract»

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  • Dual wavelength optical fiber HDTV distribution networks using self-synchronization technique and multistar topology

    Publication Year: 1994 , Page(s): 985 - 991
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (544 KB)  

    A new optical fiber time-division multiple-access (TDMA) network is proposed for HDTV distributions. It uses two wavelengths to carry optical TDMA and clock signals through the common fibers to each subscriber. At the receiver, both signals are easily separated by using a wavelength division multiplexing (WDM) demultiplexer, and therefore, the frame and time-slot synchronizations are feasibly achieved by using optical fiber delay lines to independently process the separated clock and TDMA signals. This self-synchronization characteristic can be used to improve the network flexibility, which allows one to build a large-scale HDTV distribution network based on a multistar topology. Furthermore, a sensitivity analysis of optical TDMA receivers is carried out. It is shown that, compared with a point-to-point optical fiber digital system, the multi-user optical TDMA system requires a lower extinction ratio to alleviate the performance degradation View full abstract»

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  • Dynamic tracking system using moving coil actuators for a consumer VCR

    Publication Year: 1994 , Page(s): 969 - 975
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (452 KB)  

    A new dynamic tracking system is proposed. In order to follow curved tracks, a voltage and current feedback amplifier for the moving coil actuator and hill-climb control which is applied separately to divided tracks have been developed View full abstract»

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  • An advanced low power radio 1 chip IC

    Publication Year: 1994 , Page(s): 842 - 851
    Cited by:  Papers (1)  |  Patents (18)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (644 KB)  

    A low-power single chip FM/AM radio IC capable of extending the battery life of a radio has been developed. Decreasing the current consumption is realized solely by new circuit design techniques without making changes to the conventional processes in IC fabrication. The characteristics of this IC is not degraded even though the current consumption is decreased, but instead, operating time has been improved to be four or five times than that of the conventional radio View full abstract»

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  • Quantization control for improvement of image quality compatible with MPEG2

    Publication Year: 1994 , Page(s): 821 - 826
    Cited by:  Papers (9)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (344 KB)  

    A new quantization control method for a moving picture coding system, based on MPEG 2 video syntax, is discussed. The quantization control method consists of MB (macro block) activity calculation and rate control. In considering of human visual characteristics and coding efficiency, the quantization control method performs a high quality compression of the digital video signal View full abstract»

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  • State problems in programming human-controlled devices

    Publication Year: 1994 , Page(s): 812 - 820
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (784 KB)  

    Many consumer goods are complicated enough to benefit from programmed control. Today's home electronics devices support a wide range of options and controls. At the same time, personal digital assistants and programmable remote controls are now capable of learning and generating control sequences to control a wide range of devices. Unfortunately, most device interfaces are designed for interactive human control rather than programmed control. The paper analyzes state-based obstacles to programming devices designed for interactive human control. It develops a theory of statelock, a condition in which a control program is unable to synchronize with the state machine underlying the controlled device. The paper also presents design strategies to avoid statelock and applies these strategies to the home audio/video and telephone autodialer domains View full abstract»

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Aims & Scope

The main focus for the IEEE Transactions on Consumer Electronics is the engineering and research aspects of the theory, design, construction, manufacture or end use of mass market electronics, systems, software and services for consumers.

 

Full Aims & Scope

Meet Our Editors

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