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Consumer Electronics, IEEE Transactions on

Issue 3 • Date Aug. 2006

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Displaying Results 1 - 25 of 65
  • IEEE Transactions on Consumer Electronics - Table of contents

    Page(s): 1
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    Freely Available from IEEE
  • IEEE Consumer Electronics Society

    Page(s): 0_2
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    Freely Available from IEEE
  • 2006 IEEE consumer electronics society administrative committee

    Page(s): i
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    Freely Available from IEEE
  • 2006 IEEE Consumer Electronics Society Officers And Committee Chairman

    Page(s): ii
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    Freely Available from IEEE
  • Seamless channel transition for cautious harmonic scheme in video data broadcasting

    Page(s): 719 - 725
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    For video broadcasting, the harmonic scheme has been reported to have the best performance for the user's waiting time. However, it does not always provide the video data to the users in time. This drawback has been overcome in the cautious harmonic scheme, which is easy to implement, though it requires more bandwidth. The bandwidth is assigned to a video based on its popularity, i.e., for a more popular video, a large amount of bandwidth is required. The popularity of the video changes over a period of time. Therefore, for using the bandwidth efficiently, its allocation to a video should also be adapted according to the popularity of the video, and at the same time, the user services should not get disrupted. In this paper, we propose seamless channel transition for the cautious harmonic scheme. In the proposed seamless cautious harmonic scheme, during the channel transition, the old users do not get disrupted and the new users get the same services as it is provided with the old channels. The seamless cautious harmonic scheme has much better performance for the user's waiting time than that of the seamless staircase scheme View full abstract»

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  • Embedded face recognition based on fast genetic algorithm for intelligent digital photography

    Page(s): 726 - 734
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1440 KB) |  | HTML iconHTML  

    In this paper, we propose embedded face recognition (FR) to use in intelligent image system. For efficient FR VLSI design, we use a feature selection and feature extraction method based on Gabor wavelets using a fast genetic algorithm (FGA). Many FR systems are based on Gabor wavelet due to its desirable characteristics of spatial locality and orientation selectivity. However, the process of searching for features with Gabor wavelet is computationally expensive and has an unusual sensibility for variations such as illumination. To overcome these problems and use in real-time applications, we optimize Gabor wavelet's parameters of translation, orientations and scales, which make it approximates a local image contour region by the use of hardware oriented FGA. From experimental results, we certify that our method shows recognition rate of over 97.27 % for FERET dataset, which exceeds the performance of the other popular methods View full abstract»

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  • Integrating image fusion and motion stabilization for capturing still images in high dynamic range scenes

    Page(s): 735 - 741
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (11716 KB) |  | HTML iconHTML  

    Fusing several differently exposed images is particular useful for taking pictures in high dynamic range scenes. However, the scene changes resulted from moving objects and vibrations caused by photographers must be compensated adaptively in practical camera applications. In this paper, we propose a complete image fusion system aiming at extending the dynamic range of a picture by fusing two or more differently exposed images. The proposed global and local stabilization algorithms efficiently remedy the vibration problems and get a quite stable image fusion result View full abstract»

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  • Performance evaluation of IEEE 802.15.4 for low-rate wireless personal area networks

    Page(s): 742 - 749
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (613 KB) |  | HTML iconHTML  

    IEEE 802.15.4 is an emerging standard specifically designed for low-rate wireless personal area networks (LR-WPAN) with a focus on enabling the wireless sensor networks. It attempts to provide a low data rate, low power, and low cost wireless networking on the device-level communication. In this paper, we have established a realistic environment for the preliminary performance evaluation of the IEEE 802.15.4 wireless networks. Several sets of practical experiments are conducted to study its various features, including the effects of 1) the direct and indirect data transmissions, 2) CSMA-CA mechanism, 3) data pay load size, and 4) beacon-enabled mode. The data throughput, delivery ratio, and received signal strength indication (RSSI) are investigated as the performance metrics. The results show that IEEE 802.15.4 has better performance in non-beacon mode. Some issues that could degrade the network performance are also discussed in this paper View full abstract»

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  • Robust timing recovery for TDS-OFDM-based digital television terrestrial broadcast systems

    Page(s): 750 - 756
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (912 KB) |  | HTML iconHTML  

    As an effective technique for combating multipath fading and for high-bit-rate transmission over wireless channels, orthogonal frequency-division multiplexing (OFDM) is extensively used in modern digital television terrestrial broadcasting (DTTB) systems to support high performance bandwidth-efficient multimedia services. In this paper, a new robust timing recovery scheme is proposed for the time domain synchronous OFDM (TDS-OFDM) based DTTB systems. Simulations under different channel situations verify the efficiency of the proposed scheme View full abstract»

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  • OFDM performance analysis in the phase noise arising from the hot-carrier effect

    Page(s): 757 - 765
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1099 KB) |  | HTML iconHTML  

    Phase noise can be regarded as the most severe cause of performance degradation in the orthogonal frequency multiplexing division (OFDM) systems. The hot-carriers (HCs), found in the CMOS synchronization circuits, are the high-energy charge carriers that degrade the MOSFET devices performance by increasing the threshold voltage required to operate the MOSFETs. The HC effect manifests itself as the phase noise whose level increases with the continued MOSFET operation and results in the performance degradation of the voltage-controlled oscillator (VCO) built on the MOSFETs. Nowadays, the HC effect is particularly evident in the short-channel MOSFET devices. Consequently, the MOSFET instability due to this effect leads to the OFDM system performance degradation. In this paper, we analyze the OFDM performance in the presence of synchronization errors induced by the hot-carrier effect. We derive the relationship between the OFDM system performance and the hot-carrier effect in terms of a crucial parameter, the MOSFET threshold voltage. We also present a new general phase noise model for the OFDM systems influenced by the hot-carrier effect, which is based on our new phase noise mask function. According to our simulations, we show that the OFDM bit-error-rate evaluation using our new phase noise model in the presence of the HC effect can be different in three orders-of-magnitude from the existing models independent of the HC View full abstract»

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  • Implementation of synchronization for 2x2 MIMO WLAN system

    Page(s): 766 - 773
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (792 KB) |  | HTML iconHTML  

    This work presents a novel synchronization architecture for a 2times2 MIMO OFDM WLAN system. A new CORDIC-based sinusoidal iterative oscillator architecture is also implemented to recover the carrier frequency. The proposed design mainly enhances the traditional digital oscillator, which is a CORDIC-based architecture, and which is adopted at each accumulated phase. Compared to the iterative CORDIC computation, the proposed CORDIC-based sinusoidal iterative oscillator architecture operates the CORDIC only once. Moreover, the timing controller negotiates these two antenna input signals, and gates the useless signal to lower the power consumption. The proposed architecture with high precision is simulated and emulated by 0.18 mum 1P6M CMOS technology and FPGA respectively View full abstract»

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  • Design of an efficient CORDIC-based architecture for synchronization in OFDM

    Page(s): 774 - 782
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (649 KB) |  | HTML iconHTML  

    This paper presents a new architecture to estimate the time and frequency offsets required to synchronize packed-based orthogonal frequency division multiplexing (OFDM) modulation receivers. The proposed estimators, which operate in the frequency-domain, use CORDIC (coordinate rotation digital computer) processors to achieve an efficient hardware implementation which is simpler than other computational intensive estimators based on processing in the time-domain. The hardware saving is twofold: the proposed implementation does not require complex cells such as multipliers or dividers; and some cells already existing in OFDM receivers for pay-load demodulation are reused during the synchronization phase. In addition, this paper also shows how to optimize the CORDIC cells, in terms of number of iterations, to provide a given signal-to-noise ratio (SNR) due to approximation error, and proposes an error propagation model for the proposed synchronization architecture View full abstract»

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  • Impulsive noise suppression for robust timing recovery and iterative decoding

    Page(s): 783 - 791
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (471 KB) |  | HTML iconHTML  

    The problem of baseband signal processing operations for coded communications systems employing iterative decoding in impulsive noise is treated. Prior to the decoder, such systems typically consist of a matched filter followed by a sampler that is controlled by a timing recovery algorithm to obtain soft channel outputs. This approach, however, performs poorly in the presence of impulsive noise. To overcome this problem, an impulse mitigation strategy derived from the myriad filtering framework is used to produce reliable symbol waveforms over a wide range of noise environments. This method proves to be fruitful in that all subsequent signal processing operations including symbol synchronization and iterative decoding are safe to process the symbol samples obtained hereafter, thereby retaining all their optimality and advantages View full abstract»

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  • Memory efficient and fast speech recognition system for lowresource mobile devices

    Page(s): 792 - 796
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (379 KB) |  | HTML iconHTML  

    In this paper, we consider practical issues such as memory efficiency and fast decoding to make continuous density hidden Markov model (CDHMM)-based large vocabulary speech recognition system work on resource limited mobile devices. Particularly, we focus on memory efficient acoustic modeling and fast state likelihood computation. The proposed techniques are implemented in a speaker-independent Korean speech recognition system running on a personal digital assistant (PDA) with a 32-bit fixed-point processor operating at 400 MHz. The system uses 0.5 MB memory for representing 28448 Gaussians and it runs at 2.54xRT without serious degradation of accuracy on 10 k phonetically optimized words recognition task domain View full abstract»

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  • Optimal beam-selection algorithm to improve reception performance of ATSC 8-VSB DTV

    Page(s): 797 - 801
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (145 KB) |  | HTML iconHTML  

    This paper proposes an optimal beam-selection DTV receiver which uses switched beam-selection techniques. Usually the ATSC DTV receiver uses equalizer for compensating channel distortion. But multipath signals and Doppler effect easily affected performance of the receiver in mobile and indoor environment. A proposed optimal beam-selection DTV receiver reduces multipath signals so a burden of equalizer is reduced, so channel compensation is easier than a conventional DTV receiver which uses only equalizer. Simulation results show that performance of the proposed system is better than a conventional DTV receiver View full abstract»

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  • Home network control protocol for networked home appliances

    Page(s): 802 - 810
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (661 KB) |  | HTML iconHTML  

    We propose a new home network protocol for networked home appliances (NHAs). The proposed protocol is designed for a control network using power line communication, and has low resource overheads and low cost for the NHAs, which operate on an 8-bit microprocessor. The proposed protocol network is implemented in a home control network system that comprises a home server and networked home appliances, such as washing machines, microwave ovens and air conditioners View full abstract»

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  • Harmonic data placement: file system support for scalable streaming

    Page(s): 811 - 818
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (263 KB) |  | HTML iconHTML  

    Scalable encoding scheme enables the player or streaming server to adoptively change the playback rate of multimedia content. However, in scalable streaming of layer encoded content, sequential playback of content does not necessarily coincide with the sequential scan of a file. This property introduces another dimension of complexity in the scheduling of data block retrieval. In this work, we develop a novel file organization strategy, harmonic interleaving, which can effectively handle the dynamically changing playback rate of multimedia data retrieval. The proposed scheme not only eliminates the retrieval of unnecessary blocks but also minimizes disk head movement. Via experiment, harmonic interleaving exhibits superior disk utilization on a moderately loaded network View full abstract»

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  • Rapidly constructing a simple 3-D graphic model using a consumer-user digital still camera

    Page(s): 819 - 824
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2439 KB) |  | HTML iconHTML  

    Constructing 3-D graphic image models in general uses expensive equipment so that it is difficult to develop 3-D images as popular graphics in the world. In this paper, a 3-D graphic model constructed using a consumer-user digital still camera is proposed. A simple scene is set up to conveniently process the images, captured by the consumer-user digital still camera, far 3-D graphics. Besides, the 3-D graphic model expressed by color and model matrices is approximated by six surfaces including front, left, back, right, top and bottom. The six-surface images of an object captured by the consumer-user digital still camera sculpture the 3-D graphic body to form a model matrix, and then all the six view images sequentially fill their color information in proper element of color matrix according to the finished model matrix and their view relationship. Once color and model matrices are prepared well, the complete 3-D graphics model can be obtained by combining them together. The work of constructing a 3-D graphic model is depicted by six pseudo codes and summarized by two procedures. The proposed 3-D graphic model wastes 633.6 KB at image resolution 160times120 pixels, and 3.6864 MB at image resolution 320times240 pixels. The 3-D graphic model constructed by quick procedures, and using less memory makes 3-D images used in handheld devices possible. In addition, four objects: mobile phone, stapler, correction tape and small clock, used as illustrative examples for demonstrating the 3-D graphic model are included View full abstract»

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  • Design and implementation of an end-to-end operation system for digital television

    Page(s): 825 - 829
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (421 KB) |  | HTML iconHTML  

    This paper addresses an end-to-end operation system for digital television (DTV) applications. It is designed to develop, broadcast, download and execute interactive DTV applications. The system is composed of three subsystems. They are application execution system (AES), data broadcast system (DBS) and application development environment (ADE). AES, generally called DTV middleware system, is the software system running in DTV se-top box (STB) to execute and control interactive DTV applications. It isolates DTV applications from STB hardware. DBS is used to multiplex, transmit and broadcast DTV data, as well as manage DTV applications. ADE is a special integrative toolkit designed for developing interactive DTV applications. Application developers can edit, compile, debug and test a DTV application in ADE. Then DBS broadcasts the application through DTV channel. After being downloaded into STB, the application is executed by AES in the STB. Design and implementation of these three subsystems are presented in this paper. The proposed system has been used in real environment of interactive DTV operation View full abstract»

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  • A decentralized approach for topology discovery in home netwo

    Page(s): 830 - 836
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (364 KB) |  | HTML iconHTML  

    As electronic home appliances become smart, there have been many attempts to connect these appliances with a network. Accordingly, a concept of home networks has been emerged. Since most home network users do not have experiences or knowledge of network management, home networks have to be easily managed with minimal efforts of users. This paper presents a novel system for topology discovery and management in home networks. This system is fully distributed and automatically discovers topology information with minimal user configuration. It considers heterogeneous network media such as Ethernet, WLAN, and IEEE 1394. It also provides QoS information by measuring available bandwidth. We have implemented this system on Linux and present experiment results to show the effectiveness of the system View full abstract»

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  • A GSM, internet and speech controlled wireless interactive home automation system

    Page(s): 837 - 843
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (684 KB) |  | HTML iconHTML  

    The home automation today needs to make use of the latest technological components available. In this paper, we present the design and implementation of a home automation system where communication technologies GSM (Global System for Mobile Communication), Internet, and speech recognition have been used. All these techniques are successfully merged in a single wireless home automation system. This system offers a complete, low cost, powerful and user friendly way of real-time monitoring and remote control of a house View full abstract»

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  • High-speed MB-OFDM system with multiple antennas for multimedia communication and home network

    Page(s): 844 - 849
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1615 KB) |  | HTML iconHTML  

    The rapid dissemination of digital consumer electronics devices within home and personal area causes increments of multimedia communication and of home networking. In order to meet the demand for low cost, high performance wireless entertainment network, multiple transmitting and receiving antennas can be used in MB-OFDM system to attain high-rate transmission and to offer better quality of service. The MB-OFDM system with multiple antennas increases the transmission rate efficiently with low multiplication operations. With an emphasis on a preamble design for multi-channel separation, we address a channel estimation in MB-OFDM with MIMO antenna system. By properly designing each preamble for multiple antennas to be orthogonal in time domain, the channel estimation can be applied to the MB-OFDM proposal for IEEE 802.15.3a standard in the case of more than two transmitting antennas View full abstract»

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  • Retransmission scheduling for multimedia delivery over wireless home networks

    Page(s): 850 - 856
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1225 KB) |  | HTML iconHTML  

    The key technique for wireless TVs is to deliver multimedia streams stably over an unstable wireless link. In wireless LANs, a link level retransmission mechanism is used to deal with packet losses due to unstable wireless links. While the retransmission mechanism is effective to hide link level losses to users, if may causes additional delay to other packets which is fatal for real time multimedia traffic such as TV streams. In this paper, we propose a retransmission scheduling scheme to remove the impact of packets to unstable links. In the proposed scheme, when a link to a node observes bad state, packets to the node are exclusively scheduled from others. Through extensive simulations, we show that the proposed scheme effectively removes unnecessary delay caused by retransmitted packets View full abstract»

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  • Space-time spreading based DS-UWB link scheme for wireless home entertainment networks

    Page(s): 857 - 863
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (958 KB) |  | HTML iconHTML  

    Recent developments in both the consumer electronics (CE) and PC industries make ultra-wideband (UWB) an almost perfect wireless solution to drive and benefit from the ongoing convergence of home entertainment and computing network. In order to meet increasing consumer demand for low cost, low power, flexible, and reliable wireless home entertainment networks, we present a high-speed DS-UWB link scheme employing space-time spreading (STS) technique combined with adaptive detection. Maximal path diversity at the receiver is achieved via our approach. In doing so, no extra spreading codes, transmit power, nor channel estimation is required and only minimal extra hardware complexity of the link. Both our analysis and simulation results show that, compared with the conventional single-antenna DS-UWB link, the proposed STS based DS-UWB link scheme is capable of obtaining at least 2.5 dB improvement in terms of the SNR, and therefore can be considered as a promising candidate to support multimedia wireless connections of good quality View full abstract»

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  • Modeling and analysis for optimal PVR implementation

    Page(s): 864 - 869
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (929 KB) |  | HTML iconHTML  

    This paper presents a new methodology of modeling and analyzing required elements to design an HD-DTV PVR (high definition digital television personal video recorder) with efficient architecture. The bits modeling method is based on the RMS (rate monotonic scheduling) algorithm and provides a convenient way to predict the performance of real-time PVR systems and to modify its architecture with optimal resources. From the analysis, we could design PVR whose real-time performance is verified. We also developed time-shifter ASIC chip that is in charge of manipulating HD streams to support various functions like trick-mode play in the PVR 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.

 

Full Aims & Scope

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
Fax:+44 (0) 118 3788583