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Consumer Electronics, IEEE Transactions on

Issue 2 • Date May 2012

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Displaying Results 1 - 25 of 82
  • IEEE Transactions on Consumer Electronics - Table of contents

    Page(s): C1
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  • IEEE Consumer Electronics Society

    Page(s): C2
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    Freely Available from IEEE
  • 2012 IEEE Consumer Electronics Society Administrative Committee

    Page(s): i
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    Freely Available from IEEE
  • 2012 IEEE Consumer Electronics Society Officers and Committee Chairs

    Page(s): ii
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  • Special section on innovations in digital games

    Page(s): iii
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  • Message from the editor: important change of dates from 2013!

    Page(s): iv
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  • The itron family of geocast games

    Page(s): 171 - 177
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1182 KB) |  | HTML iconHTML  

    Geocast games are a new class of digital multiplayer games, inherently involving vigorous physical activity in outdoor natural settings such as parks, camps, or athletic fields. They are designed for commercial location-aware smartphones carried or worn by players, without requiring consoles or Internet connections. The iTron Family of geocast games illustrates how physical athletic play can be combined with real-time strategic, imaginative, and creative cognitive play from the domain of digital games to produce sports of the future appealing to a wide range of ever more sophisticated players. This paper describes the family and its variation points, as well as its implementation in a smartphone prototype, and an initial evaluation. View full abstract»

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  • Foodie: play with your food promote interaction and fun with edible interface

    Page(s): 178 - 183
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1126 KB) |  | HTML iconHTML  

    This paper presents Foodie, a novel interactive system that promotes interactive entertainment using the real edible food, connecting digital playfulness with active participation in the food creation and eating experience. Through this system, people can not only create novel food media and share with remote family members or friends, but also serve them with the physical food. This system adds another natural and organic dimension - edible food with smell and taste, to enhance the lifelike feeling and enrich the play experience. We believe the actual manipulation of real food through digital drawings would increase the engagement and enjoyment even for remote people, extending the digital playfulness of food games with real life experience. Besides social entertainment, this intuitive interface also provides an attractive channel for kids to try out and learn about realistic cooking, in a safe, creative and playful way. View full abstract»

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  • Game interface using digital textile sensors, accelerometer and gyroscope

    Page(s): 184 - 189
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (636 KB) |  | HTML iconHTML  

    Pressure sensors connecting with accelerometer and gyroscope through conductive, washable fabric, is designed into a dancing game to detect movements of a player. The firmware in microcontroller mounted on a belt can judge the player's movements with enough accuracy that the player would not be limited by conventional wires and resident equipments as used in other popular dancing games. This novel wearable entertainment system provides a mixed reality game interface in which users can dance through 3 Modes with increasing sophistication. View full abstract»

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  • The ghost club storyscape: designing for transmedia storytelling

    Page(s): 190 - 196
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (369 KB) |  | HTML iconHTML  

    One of the key questions about transmedia storytelling is how to design a participant's experience across different media so that it is connected and perceived as a whole. We extract four design connectors for building such relationships from current work in media studies, production literature, and practice. These proposed design components are mythology, canon, character and genre. The goal of these connectors is to create relationships that form a whole work from stand-alone parts. To test this approach we have designed and developed a group of connected digital media expressions, The Ghost Club Storyscape, to experiment with these four ingredients on multiple media. View full abstract»

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  • Adaptive virtual environments for neuropsychological assessment in serious games

    Page(s): 197 - 204
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (571 KB) |  | HTML iconHTML  

    While advances in military relevant simulations provide potential for increasing assessment of Soldier readiness to Return-to-Duty (e.g., following a blast injury), little has been done to develop these simulations into adaptive virtual environments (AVE) for improved neurocognitive and psychophysiological assessment. Adaptive assessments offer the potential for dynamically adapting the difficulty level specific to the patient's knowledge or ability. We present an iteration of the Virtual Reality for Cognitive Performance and Adaptive Treatment (VRCPAT) that proffers a framework for adapting scenarios in a game engine based upon the user's neurocognitive (task performance) and psychophysiological (e.g., heart rate, skin response, heart rate, and pupil diameter) states. View full abstract»

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  • Flash shadow detection and removal in stereo photography

    Page(s): 205 - 211
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1538 KB) |  | HTML iconHTML  

    Shadows created by flash when taking stereo images adversely affect 3D perception when stereo images are merged into 3D images. This paper presents a shadow detection and removal algorithm for stereo images taken under flash lighting. This is the first attempt at addressing the flash shadow problem in stereo photography. A quantitative measure is introduced to evaluate the effectiveness of shadow detection and a subjective rating is done to evaluate the effectiveness of shadow relighting or removal for 3D perception. It is shown that the developed solution outperforms the previous solutions designed for single images. View full abstract»

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  • Effect of nonlinear stiffness on the total harmonic distortion and sound pressure level of a circular miniature loudspeaker-experiments and simulations

    Page(s): 212 - 220
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (715 KB) |  | HTML iconHTML  

    This paper reports our study on the nonlinear stiffness of a few diaphragm designs used for miniature loudspeakers. For this study, the sample diaphragms were experimented for their stiffness curves using the laser vibrometry. Additionally, the stiffness curves were also obtained using finite element analysis (FEA). For calculating total harmonic distortion (THD), the electroacoustic system is modeled using the equivalentcircuit analogy. As a result of solving the coupled system of ordinary differential equations by the Runge-Kutta method, THD of three sample designs, characterized by different track patterns, were calculated and plotted as a function of frequency. The specimens were tested in a standard anechoic chamber for recording THD. Additionally, the sound pressure level (SPL) curves of these specimens were also recorded for comparison. It turns out that, despite no significant SPL difference, diaphragms with different track patterns shall, as a result, lead to substantial variations of THD. The consistence of our simulations with the measured THD has promised the feasibility of simulating THD by FEA for optimizing the design of track patterns for diaphragm. View full abstract»

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  • Total harmonic distortion improvement for elliptical miniature loudspeaker based on suspension stiffness nonlinearity

    Page(s): 221 - 227
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (778 KB) |  | HTML iconHTML  

    This article reports the effect of geometric modification of diaphragm on the total harmonic distortion (THD) for an elliptical miniature loudspeaker by systematically investigating and modifying suspension stiffness. Three diaphragms, typified by different track patterns on the concave ring are simulated and experimented. Initially, the prototype specimens were tested for stiffness curves and electroacoustic parameters by laser vibrometry. Further, the stiffness curves for three sample designs were numerically modeled using finite element analysis (FEA). The loudspeaker is also modeled using equivalent circuit method (ECM) for simulating THD. As a result of employing Runge- Kutta method for the solution of a coupled system of ordinary differential equations, THD was calculated and subsequently presented as a function of frequency. In addition, their THD was measured in a standard anechoic chamber and compared with simulations. It is found that the effect of track patterns on the sound pressure level is absolutely insignificant. On contrary, effect on THD is observable and leads to the conclusion that the diaphragm with curved tracks outperforms other diaphragms (partial straight and straight tracks). The reliability of simulation and its confirmation with the measurement has assured the possibility of simulating THD by FEA and analytical method for design optimization of track patterns. View full abstract»

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  • A filter-switching auto-focus framework for consumer camera imaging systems

    Page(s): 228 - 236
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2158 KB) |  | HTML iconHTML  

    Auto-focus (AF) has become a standard feature in consumer level cameras. The most common AF approach analyzes a captured image with a digital band-pass filter applied to a focus region producing a focus value, which is then used by a search algorithm to locate the peak value position. The existing literature does not adequately address how to set the AF parameters such as the filter pass-band and the step-size magnitude. In this paper, a framework is presented to derive the AF parameters automatically based on camera specifications. Also, a new AF search algorithm named Filter-Switching Search is introduced which takes advantage of the derived AF parameters. The effectiveness is demonstrated via real-time implementation on three different camera platforms. Results indicate that the developed solution is portable across different platforms and outperforms the existing approaches without the need for extensive parameter tuning. View full abstract»

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  • Optical image stabilizing system using fuzzy sliding-mode controller for digital cameras

    Page(s): 237 - 245
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4146 KB) |  | HTML iconHTML  

    An optical image stabilizing (OIS) system using fuzzy sliding-mode controller (FSMC) is presented in this research. The OIS system shifts the image sensor to correct the deviation from the optical path caused by a user's handshake vibration. The voice coil motors (VCM) was adopted to drive the OIS module which bears the image sensor, a gyroscope was used to detect the hand-shake vibration, and two single-axis hall sensors were designed to sense the position of the VCM actuators. The proposed FSMC overcomes the nonlinear, hysteresis, and time-varying properties of the VCM actuator efficiently. The stabilizing performance was demonstrated by digital photographs taken under different test conditions. View full abstract»

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  • Visual discomfort visualizer using stereo vision and time-of-flight depth cameras

    Page(s): 246 - 254
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1120 KB) |  | HTML iconHTML  

    Visual discomfort monitoring is an important technique for comfortable viewing of stereoscopic images. This paper proposes a novel monitoring system of visual discomfort that takes advantages of a fusion camera system equipped with stereo vision cameras and a time-of-flight camera. We improve disparity map enhancement technique to obtain a high-quality disparity map that is aligned to the right view color image coordinate. The captured stereo-plusdisparity images are used for visual discomfort visualizer that automatically predicts overall degree of perceived visual discomfort and visualizes which regions are problematic in terms of visual discomfort. The proposed visual discomfort visualizer is based on visual importance of image scenes, resulting in considerable improvement in prediction performance of visual discomfort. The experimental results showed that the proposed system could generate enhanced disparity maps and achieve visual discomfort prediction accuracy that is feasible for practical applications. View full abstract»

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  • Employing a RGB-D sensor for real-time tracking of humans across multiple re-entries in a smart environment

    Page(s): 255 - 263
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (582 KB) |  | HTML iconHTML  

    The term smart environment refers to physical spaces equipped with sensors feeding into adaptive algorithms that enable the environment to become sensitive and responsive to the presence and needs of its occupants. People with special needs, such as the elderly or disabled people, stand to benefit most from such environments as they offer sophisticated assistive functionalities supporting independent living and improved safety. In a smart environment, the key issue is to sense the location and identity of its users. In this paper, we intend to tackle the problems of detecting and tracking humans in a realistic home environment by exploiting the complementary nature of (synchronized) color and depth images produced by a low-cost consumer-level RGB-D camera. Our system selectively feeds the complementary data emanating from the two vision sensors to different algorithmic modules which together implement three sequential components: (1) object labeling based on depth data clustering, (2) human re-entry identification based on comparing visual signatures extracted from the color (RGB) information, and (3) human tracking based on the fusion of both depth and RGB data. Experimental results show that this division of labor improves the system¿s efficiency and classification performance. View full abstract»

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  • A highly power-efficient LED backlight driving system for LCD TVs

    Page(s): 264 - 268
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2276 KB) |  | HTML iconHTML  

    A highly power-efficient light-emitting diode (LED) backlight driving system for liquid crystal display televisions (LCD TVs) to optimize the output voltage of boost converter is proposed. To optimize the output voltage, the forward voltage of each LED channel is analyzed and the turn-on sequence of LED channels is rearranged according to the forward voltages of LED channels. As a result, the output voltage tracks the required output voltage to drive target current in each LED channel. Experimental results show that the improvement of power efficiency is 3.8% in the proposed LED backlight driving system with 1% on-duty ratio of the pulse width modulation (PWM) signal and 5 V forward voltage variation of LED channels. View full abstract»

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  • Cell interleaving against impulsive noise in OFDM

    Page(s): 269 - 273
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1033 KB) |  | HTML iconHTML  

    Orthogonal Frequency Division Multiplexing (OFDM) is a modulation technique which is very sensitive to impulsive noise (IN). In this paper, we research the behavior of the OFDM based broadcasting system Digital Radio Mondiale (DRM) against this kind of noise in function of its different transmission modes and interleaving options. This research involves an experiment in which a real DRM signal is modulated, transmitted, received, and demodulated. The results quantitatively show the improvement when deep cell interleaving is used, and also the little influence that transmission mode has on the behavior of DRM against IN. In this paper, it is also explained in a mathematical way why it is advisable to perform deep cell interleaving between several OFDM symbols and not within only one, in order to minimize the effect of IN. View full abstract»

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  • Experimental outage capacity analysis for off-body wireless body area network channel with transmit diversity

    Page(s): 274 - 277
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (527 KB) |  | HTML iconHTML  

    This paper investigates the diversity gains and outage capacities of wireless body area network (WBAN) channels with transmit diversity. The off-body channel in an anechoic chamber, with respect to various human movements and the position of the transmit antennas, are measured to evaluate the influence of the usual body movements on the performance of off-body WBAN systems. It has been demonstrated that transmit diversity exploiting two uncorrelated channels relieves the harmful effect of human movement on the channel conditions and achieves high diversity gains. View full abstract»

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  • Performance analysis on demodulation of the base layer in the AT-DMB system

    Page(s): 278 - 283
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1088 KB) |  | HTML iconHTML  

    In the advanced T-DMB (AT-DMB) system, the performance of the base layer is affected by both modulation noise and a demodulation method. The amount of modulation noise is determined by the hierarchy parameter of the transmitter, and thus it is not controllable at the receiver. On the other hand, a demodulation method for the base layer can be freely selected by the designer and it dominates the performance of the base layer. This paper focuses on the performance analysis of the base layer in the AT-DMB system according to the choice of a demodulation method and provides useful information for designing receivers for the AT-DMB system. View full abstract»

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  • Cooperative wireless sensor environments supporting body area networks

    Page(s): 284 - 292
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3151 KB) |  | HTML iconHTML  

    Wireless Body Area Network (WBAN) in recent years have received significant attention, due to their potential for increasing efficiency in healthcare monitoring. Typical sensors used for WBAN are low powered single transceiver devices utilizing a single channel for transmission at the Medium Access Control (MAC) layer. However, performance of these devices usually degrades when the density of sensors increases. One approach to counter this performance degradation is to exploit multiple channels at the MAC layer, where optimal usage of the channels is achieved through cooperation between the sensor nodes. In this paper we propose a cooperative WBAN environment that supports multi-hop transmission through cooperation involving both environmental sensors and WBAN nodes. Our solution extends the cooperation at the MAC layer to a cross-layered gradient based routing solution that allows interaction between WBAN and environmental sensors in order to ensure data delivery from WBANs to a distant gateway. Extensive simulations for healthcare scenarios have been performed to validate the cooperation at the MAC layer, as well as the cross-layered gradient based routing. Comparisons to other cooperative multi-channel MAC and routing solutions have shown the overall performance improvement of the proposed approach evaluated in terms of packet loss, power consumption and delay. View full abstract»

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  • Efficient signal detection technique for interactive digital broadcasting system with multiple antennas

    Page(s): 293 - 301
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (592 KB) |  | HTML iconHTML  

    DVB standards are currently being implemented in various countries, not only in Europe, but also around the world. In order to meet various consumers' demands, the DVB standards support interactive services. Among the interactive broadcasting services, DVB-RCT based on OFDM can be used for interactive broadcasting service in terrestrial broadcasting network. To improve the DVB-RCT system performance, a combining of MIMO signal processing with OFDM is very efficient solution. To detect the received MIMO signal with low complexity, an efficient detection technique with K-best scheme is proposed in this paper. The proposed technique can overcome the limitations of K-best scheme which are performance limitation and high complexity. View full abstract»

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  • A cognitive radio indoor HDTV multi-vision system in the TV white spaces

    Page(s): 302 - 310
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (651 KB) |  | HTML iconHTML  

    Wireless multi-vision applications for home entertainment are becoming an important trend in consumer electronics domain. Currently, most of the existing applications rely on the 802.11g/n standards, capable to seamlessly stream HD video contents. These standards are operating in the license-free ISM band, which, due to the rapid revolution in wireless communication in past years, is becoming overexploited and experiences serious coexistence problems. The spectrum overcrowding in the free bands puts in a new light the VHF and UHF bands that are currently seen as a promising alternative spectrum resource, especially in the perspective of the worldwide switchover from analog to digital TV and in the light of the new emerging dynamic spectrum access techniques. Within this framework, this paper presents an unlicensed cognitive radio indoor multi-vision system operating in the UHF TV band for short-range indoor transmission of high definition TV contents. The system relies on a combined exclusive approach of spectrum sensing and geo-location database and is compliant with the DVB-T2 broadcasting standard. A proof-of-concept digital terrestrial television (DTT) compliant prototype has been implemented on a test-bed based on commercial DTT receivers in combination with software defined radio hardware devices. Extended measurements performed in a real indoor environment assessed the feasibility of the proposed system in terms of coverage and protection of the incumbent users. 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