By Topic

Consumer Electronics, IEEE Transactions on

Issue 4 • Date Nov. 1996

Filter Results

Displaying Results 1 - 25 of 29
  • 1996 Index IEEE Transactions on Consumer Electronics vol. 42

    Publication Year: 1996 , Page(s): 1 - 23
    Save to Project icon | Request Permissions | PDF file iconPDF (3166 KB)  
    Freely Available from IEEE
  • Twin-actuators for ultra-fast access in CD-ROM systems

    Publication Year: 1996 , Page(s): 1073 - 1084
    Cited by:  Papers (3)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1232 KB)  

    This paper describes the principle of the twin-actuator CD-ROM drive and the improvement it brings to the access performance. After a brief introduction, a novel one-sledge twin-actuator construction is presented which leads to very short seek times. An adaptive twin-actuator construction is also described. Finally, some calculations for systems with two independent actuators are carried out. The seek performance of a twin-actuator drive is calculated as related to a standard CD-ROM benchmark View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiresolution mosaic

    Publication Year: 1996 , Page(s): 981 - 990
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1476 KB)  

    Mosaic techniques have been used to combine two or more signals into a new one with an invisible seam, and with as little distortion of each signal as possible. Multiresolution representation is an effective method for analyzing the information content of signals, and it also fits a wide spectrum of visual signal processing and visual communication applications. The wavelet transform is one kind of multiresolution representation, and has found a wide variety of application in many aspects, including signal analysis, image coding, image processing, computer vision and etc. Due to its characteristic of multiresolution signal decomposition, the wavelet transform is used in this paper to do the image mosaic by choosing the width of mosaic transition zone proportional to the frequency represented in the band. Both 1-D and 2-D signal mosaics are described, and some factors which affect the mosaics are discussed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A new optical detector for a high-speed AF control

    Publication Year: 1996 , Page(s): 1055 - 1061
    Cited by:  Papers (8)  |  Patents (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (388 KB)  

    A high speed focus control method is one of the important features of a video camera. This paper presents a new optical detector (OPD) that provides a high-speed auto focus (AF) control. The optical detector detects data to control AF, auto exposure (AE) and auto white balance (AWB). A conventional optical detector detects only one characteristic data in a field, however, the new OPD detects several characteristic data in a field. Therefore this new optical detector can execute high speed detection for AF control. The new optical detector implements the above functions by switching the filter coefficient every line View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ghost measurement by waveform synthesis

    Publication Year: 1996 , Page(s): 893 - 899
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (576 KB)  

    A television ghost is measured by synthesizing the ghost waveform demodulated by an in-phase synchronous demodulator. For this purpose, the calculated in-phase and quadrature demodulated waveforms of known transmitted waveforms are prepared at the receiving site. A ghost path is constructed by a software simulator where a ghost waveform is synthesized by changes in the ghost parameters consisting of the amplitude, phase and time delay. The ghost parameter in which a synthesized ghost waveform in the simulator equals the demodulated ghost waveform is the ghost parameter itself of a real ghost path. The steepest descent method is used to optimize the ghost parameter in the simulator. The proposed ghost measurement method uses only a synchronous demodulated waveform. Therefore, as compared with the conventional method using quadrature demodulated waveforms, the circuit scale is small, and it is possible to avoid measurement errors caused by phase fluctuations in the quadrature demodulator View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive non-uniform sampling delta modulation for audio/image processing

    Publication Year: 1996 , Page(s): 1062 - 1072
    Cited by:  Papers (3)  |  Patents (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1436 KB)  

    Adaptive non-uniform sampling delta modulation (ANS-DM), a modification of the non-uniform sampling delta modulation (NS-DM) technique, is proposed and examined. The proposed technique has been applied to audio and image processing; simulation results have shown that the ANS-DM technique has good improvement over linear delta modulation (LDM), adaptive delta modulation (ADM) and NS-DM on the compression ratio, the SQNR, and the dynamic range View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An universal video front end for advanced TV sets

    Publication Year: 1996 , Page(s): 1037 - 1043
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (536 KB)  

    All of the processing necessary to convert an analog video signal into a digital component stream have been integrated onto a single 68-pin IC. Processing features include nonlinear scaling which allows one to switch between 4:3 and 16:9 applications under software control View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Color filters for CRT-based rear projection television

    Publication Year: 1996 , Page(s): 1050 - 1054
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (440 KB)  

    A new method is proposed for design of dye-coated filters to improve the purity of projection TV systems. Rather than simply basing the color performance criterion on chromatic saturation, the optimum dye concentration is found by maximizing the chroma values of the primary colors or the volume of the color gamut in a 3-D uniform color space View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • “Browse search using audio key-information” for multimedia on-demand systems

    Publication Year: 1996 , Page(s): 900 - 906
    Cited by:  Papers (1)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (736 KB)  

    “Browse search using audio key information” enhances the information search on multimedia on-demand systems. In this scheme, audible digests (key information), used for browsing, are provided synchronously with text based indexes to the corresponding information View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A comparison of rotary- and stationary-head video tape recorders

    Publication Year: 1996 , Page(s): 998 - 1002
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (556 KB)  

    In magnetic tape recording, two approaches have emerged in which essentially the same medium is tracked in two different ways: rotary- and stationary-head recorders. Both approaches are commonly employed in digital audio and data recording, but since the introduction of the first analog video recorders in the early 50s, rotary-head recorders (either helical or transverse scan) have held undivided sway in the video domain. The advent of various new enabling techniques such as (MPEG) source coding and multi-trade heads may affect the hegemony of the rotary-head machine. The article appraises both types of transport in an attempt to establish which approach might be considered for a given application View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frequency division algorithm for multi-path ghost cancellation

    Publication Year: 1996 , Page(s): 930 - 938
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1272 KB)  

    The frequency division algorithm for multi-path ghost cancellation is described through the frequency-domain optimization method for analog and digital TV transmission. Some guidelines for the frequency division method are provided. A novel method to calculate the FIR and IIR coefficients of the deghost systems from the results of the frequency division is proposed. The simulation results are presented by using a Grand Alliance vestigial sideband channel model View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Combined OFDM-CDMA configuration for multimedia wireless applications

    Publication Year: 1996 , Page(s): 865 - 873
    Cited by:  Papers (5)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1192 KB)  

    This paper analyses the applicability of OFDM modulation when combined with CDMA for multimedia wireless systems operating in an indoor environment. We demonstrate the motivations and benefits deriving from this combination. Particular emphasis is given to channel equalisation techniques, designed to face different problems arising in the up-link and in the down-link. In particular, an equalisation technique based on channel inversion, combined with carrier interleaving and adaptive suppression of noisy carriers, is proposed in the down-link, while a pre-equalisation approach is used in the up-link. The analysis provides both BER performance and computational cost of the most important procedures that are to be implemented within multimedia terminals. The computational cost analysis is carried out using commercial DSP platforms View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Agent based graphical user interface architecture for consumer products

    Publication Year: 1996 , Page(s): 1044 - 1049
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (544 KB)  

    A flexible graphical user interface (GUI) software domain model for consumer products with agent based paradigm is discussed. An object library founded on the model has been created with memory reduction design methods View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The design of a low cost motion chair for video games and MPEG video playback

    Publication Year: 1996 , Page(s): 991 - 997
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (848 KB)  

    We have developed a low-cost force output device as a user interface and combine it with an MPEG-1 video player to form a virtual reality system for entertainment. We designed a motor-powered motion chair to create the sensation of being carried in an airplane or a vehicle. To obtain smooth motion, curve fitting and filtering on the motion trajectory are used. The synchronization of video and motion chair is solved with the techniques of motion prediction, while combined with a joystick provides a way for interactive games View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A digital radio processor for channel demodulation and source decoding of satellite radio programs

    Publication Year: 1996 , Page(s): 946 - 951
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (508 KB)  

    New satellite based digital radio standards have been developed. The advantages of these standards (CD-like sound quality, small bandwidth requirements, embedded digital data services) require considerable larger modulation and demodulation efforts because forward error correction and sophisticated data compression techniques are used. The commercial success of these radio systems is closely related to the availability of low cost receiver equipment. This paper describes the concept and the architecture of a chipset that is designed for the demodulation of digital radio signals according to the European Astra digital radio (ADR) standard. The chipset consists of the multistandard sound processor (MSP) chip which is already widely used in standard satellite receivers or TV sets, and the newly developed digital radio processor (DRP) as a coprocessor for ADR decoding. The presented chipset allows a very cost-effective upgrade of standard satellite receivers for digital broadcast reception because substantial parts of the analog TV-sound processing are used for ADR-demodulation as well. Both ICs of the chipset are based on DSP-cores that provides a high flexibility with respect to modifications and additional features View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An efficient block-matching criterion for motion estimation and its VLSI implementation

    Publication Year: 1996 , Page(s): 885 - 892
    Cited by:  Papers (14)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1080 KB)  

    The block-matching motion estimation is the most popular technique for motion compensated coding of image sequence. Due to the intensive computational requirement to perform motion estimation (ME) in real-time, application specific VLSI implementation of the ME is indispensable. We present a novel block-matching criterion for motion estimation called reduced bits mean absolute difference (RBMAD). By comparison with conventional schemes, our scheme reduces hardware requirement and increases the speed of computation in VLSI chip with acceptable video performance. We describe in detail the video performances of proposed criterion and conventional ones. We also show our VLSI implementation using the proposed scheme to compare the hardware requirement and operating speed with conventional ones. It is found that RBMAD using 4 bits has reasonable video performance with 57% less VLSI area and 34% faster, thus it is suitable for low cost applications of video coding View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pilot spacing in orthogonal frequency division multiplexing systems on practical channels

    Publication Year: 1996 , Page(s): 959 - 962
    Cited by:  Papers (52)  |  Patents (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (372 KB)  

    The performance of two different channel interpolation methods to be used with orthogonal frequency division multiplexing systems are investigated. The considered schemes use constant pilot frequencies for channel response estimation. The interpolation techniques are piecewise-constant and piecewise-linear methods which due to their inherent simplicity are straightforward to implement. The results are given as error probability vs. pilot separation for a channel with exponential type power-delay profile and M-ary quadrature amplitude (MQAM) submodulation with M=4, 16 and 64 View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive rate control scheme for very low bit rate video coding

    Publication Year: 1996 , Page(s): 974 - 980
    Cited by:  Papers (5)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (852 KB)  

    In video coding systems, an effective rate control method is one of the most important issues for a good video quality. This paper presents an adaptive rate control scheme based on buffer fullness, quantization, and buffer utilization for very low bit rate communication lines, such as 16 kbit/s, 32 kbit/s, and so on. The strategy is implemented by the H.263, which is a video coding algorithm for narrow band telecommunication channels up to 64 kbit/s recommended by the ITU-T SG15, to show the effectiveness. The simulation result shows that the suggested rate control scheme has better SNR performance and buffer utilization of the source coder than those of linear and non-linear buffer control strategies View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A scalable architecture for video-on-demand servers

    Publication Year: 1996 , Page(s): 1029 - 1036
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (888 KB)  

    One of the most important requirements to bring the interactive video-on-demand services to residential consumer use is the scalability of the video server. The design issues for a scalable video server is described and, according to these issues, the system architecture of the scalable video servers are proposed. The system uses ATM switching technology to scale up the dimension of the service. There are four major components within the proposed system, namely the server headend control (SHC) unit, the stream router, the video pumping unit (VPU) and distributed storage devices. The functions of each components is described and the key components in the system are the stream router and the VPU. Operations and performance limitations on the video pumping unit are given and the result shows that a single storage device can serve only a limited number of video streams. Finally the paper focuses on the stream router as it is used to connect multiple VPUs. Experimental results show that the proposed stream router can produce guaranteed throughput and bounded delay variance for video applications View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A single chip demodulator for 64/256 QAM

    Publication Year: 1996 , Page(s): 1003 - 1010
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (848 KB)  

    This paper describes a single chip demodulator for 64/256 QAM targeted to digital cable transmission applications. This chip incorporates specific novel functionality to mitigate channel impairments typical of cable transmission systems and consumer grade tuners View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An innovative tuner for a DBS receiver

    Publication Year: 1996 , Page(s): 914 - 919
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (408 KB)  

    An innovative satellite tuner for a DBS receiver is presented. The single conversion architecture, front end performance, phase lock loop, SAW IF matching filter, quadrature demodulation, a custom dual A/D, and AGC are discussed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New generation of real-time software-based video codec: Popular Video Coder II (PVC-II)

    Publication Year: 1996 , Page(s): 963 - 973
    Cited by:  Papers (3)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1316 KB)  

    A new generation of real-time software-based video coder, the Popular Video Coder II (PVC-II), is presented.. The transform and the motion estimation parts are removed and the quantizer and the entropy coder are modified in the PVC-II as compared with the traditional video coder. Moreover, the PVC-II improves the coding performance of its previous version, the Popular Video Coder, by introducing several newly developed efficient coding techniques, such as the adaptive quantizer, the adaptive resolution reduction and the fixed-model intraframe DPCM, into the codec. The coding speed, compression ratio and picture quality of the PVC-II are good enough for applying it to various real-time multimedia applications. Since no compression hardware is needed for the PVC-II to encode and decode video data, the cost and complexity of developing multimedia applications, such as video phone and multimedia e-mail systems, can be largely reduced View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • MPEG decoder architecture for embedded applications

    Publication Year: 1996 , Page(s): 1021 - 1028
    Cited by:  Papers (3)  |  Patents (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (756 KB)  

    A determinate global data transfer timing scheme will significantly reduce the complexity of global control and ease constraints on sub-modules. Such a scheme allows to construct functional modules based on an explicit performance and data flow requirement. A very low gate count hardware architecture for MPEG decoder is presented to demonstrate the concept View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A study on technology for optimization of tape loading

    Publication Year: 1996 , Page(s): 952 - 958
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (784 KB)  

    The tape thickness and width are reduced in order to realize high-density recording, long time recording and small mechanism (e.g., digital-VCR). Thus, the tape stiffness becomes very low and the tape tends to be damaged. We have developed a new methodology and a new analysis system to optimize the tape damage free loading mechanism design View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the low-frequency suppression performance of DC-free runlength-limited modulation codes

    Publication Year: 1996 , Page(s): 939 - 945
    Cited by:  Papers (7)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (796 KB)  

    Basic trade-offs between the rate of combined DC-free runlength-limited (DCRLL) modulation codes and the amount of suppression of low-frequency components are presented. The main results are obtained by means of a numerical study of dependencies between statistical properties of ideal, “maxentropic” DCRLL sequences. The numerical results are mathematically founded by proving the observed behavior of the Shannon capacity of the DCRLL constraints for asymptotically large values of digital sum variation. Presented characteristics of maxentropic DCRLL sequences comply with the corresponding properties of maxentropic pure DC-free sequences, as previously considered by Justesen (1982) and Immink (1991). Knowledge of the maxentropic bounds enables us to evaluate the performances of implemented DCRLL codes with respect to their low-frequency suppression capability. Among the considered codes are the EFM code as applied in the compact disc system, and the EFMPlus code which has been adopted as the coding format of the DVD system View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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