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Consumer Electronics, 1997. ISCE '97., Proceedings of 1997 IEEE International Symposium on

Date 2-4 Dec. 1997

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Displaying Results 1 - 25 of 79
  • ISCE '97. Proceedings of 1997 IEEE International Symposium on Consumer Electronics (Cat. No.97TH8348)

    Publication Year: 1997
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    Freely Available from IEEE
  • Author's index

    Publication Year: 1997, Page(s):xix - xxii
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    Freely Available from IEEE
  • A 3V micropower programmable gm-C filter set for hearing aids

    Publication Year: 1997, Page(s):35 - 38
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    In this paper, we present the design and IC implementation of a 3V micropower programmable transconductance-C (gm-C) filter set for hearing aid applications. The filter set comprises 3 biquads, including a proposed high pass biquad which features the simplest structure to date. The filter set features a novel architecture in that it may be configured as a single 3-channel device or a si... View full abstract»

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  • Cost-effective implementation of ITU-T G.723.1 on a DSP chip

    Publication Year: 1997, Page(s):31 - 34
    Cited by:  Papers (3)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    This paper presents a full-duplex, real-time implementation of ITU-T G.723.1 speech coder using the SSP1820, Samsung's DSP chip which is based on a 16-bit fixed-point Oak core. Optimization methods are proposed in order to reduce the total cycle time consumed in real-time implementation. The multi-pulse maximum likelihood quantization (MP-MLQ) excitation search block which is the most computation-... View full abstract»

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  • Speaker verification for home security system

    Publication Year: 1997, Page(s):27 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    In this paper, we attempt to develop a reliable speaker verification algorithm that is suitable for use in a home security system. A phoneme-based hidden Markov model (HMM) has been adopted for the task of speaker verification with linear predictive cepstral coefficients (LPCC) as feature vectors for our model. Individual codebooks, designed to enhance performance, are also generated for all speak... View full abstract»

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  • Efficient architecture for spatial hearing expansion

    Publication Year: 1997, Page(s):23 - 26
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A new efficient method for a two channel source 3-D sound system is presented. This architecture provides an efficient surround effect with two speaker systems while maintaining the front components of the original source. This method uses the head related transfer function (HRTF) for new sound localization which provides listener perception of spatial hearing expansion. Unlike the conventional 3-... View full abstract»

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  • Differentially coherent code phase synchronization technique in a DS-SS mobile packet radio

    Publication Year: 1997, Page(s):202 - 205
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    In the direct sequence spread spectrum packet radio system, pseudonoise (PN) code synchronization is an essential part which could affect the overall system performance and has to be done in a short time period. In this paper a code phase synchronization device which employs differential detection structure to enhance the overall packet detectability is presented. This device also employs the auto... View full abstract»

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  • Key distribution for secure VSAT satellite communications

    Publication Year: 1997, Page(s):19 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper presents a modified Yacobi scheme that does not use the secret key provided by the key distribution center, but uses instead a random number generated by the user. This paper also presents a modified Diffie-Hellnan (DH) scheme with ID (identity) which has directly mutual authentication between users and is able to defend the network from impostors. The proposed scheme based on the DH wa... View full abstract»

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  • Effects of spreading chip waveform pulse-shaping on the performance of DS-CDMA indoor radio personal communication systems in a frequency-selective Rician fading channel

    Publication Year: 1997, Page(s):198 - 201
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A direct-sequence CDMA (DS-CDMA) mobile radio personal communication system operating over an indoor, Rician fading channel employing differential phase shift keying (DPSK) modulation with different chip waveforms is investigated. The performance evaluation in terms of bit error probability considers a star network architecture with a variety of spreading chip waveforms. The computation results sh... View full abstract»

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  • D-VHS VCR for the digital broadcasting system

    Publication Year: 1997, Page(s):15 - 18
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A new VCR for the digital broadcasting systems based on the D-VHS format has been developed. It can record digital bit stream data from the digital broadcasting receiver in addition to the current VHS analog recording, using a D-VHS tape which contains the same material as a S-VHS tape View full abstract»

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  • PIM-ASCII100 digital data encoding scheme for short distance wireless infrared transmission

    Publication Year: 1997, Page(s):145 - 148
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    This paper proposes the PIM-ASCII100 digital data encoding scheme for short distance infrared (IR) wireless communication between two nodes. This PIM-ASCII100 digital data encoding scheme is a modified version of the pulse position modulation (PPM) data encoding scheme and is intended for fast, low power and reliable IR wireless transmission with simple, minimum and low-cost hardware implementatio... View full abstract»

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  • Distance education system on a distributed objected multimedia environment and applying intelligent classroom monitoring system using ISDN

    Publication Year: 1997, Page(s):296 - 299
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    This paper proposes a distance education system based on CBM using a personal computer which is real time interactive system with the addition of an external device. This system works with educational systems that are located at multiple campuses for delivering lectures with the aid of a surveillance system. This distance education system consists of multiple functions such as white-board, multipl... View full abstract»

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  • 2× speed for DVD-ROM playback system

    Publication Year: 1997, Page(s):107 - 110
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    2× DVD-ROM drive has been developed under with a rate of 2.76 MB/s, double the speed of regular DVD data transfer, and low data jitter is realized by a high bandwidth equalizer (HBW EQ). A 4 Mbits SDRAM (synchronous D-RAM) is introduced as the buffer memory in order to process for data both the 2× speed DVD-ROM and the DVD video player View full abstract»

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  • DVD players using a Viterbi decoding circuit

    Publication Year: 1997, Page(s):95 - 98
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    We have developed a Viterbi decoding circuit which is suitable for DVD players. We designed it to be compact and efficient by utilizing the rule of the DVD recording code. By experiment, we confirmed that the Viterbi decoder reproduced digital data more precisely than a conventional bit-by-bit decoder. Thereby it improves the reliability of the DVD players. It was integrated into a data processing... View full abstract»

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  • Parallel implementation of fractal image compression

    Publication Year: 1997, Page(s):169 - 172
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Digital images require a large amount of data to be represented. To make image storage and transmission practical and economical, image compression has become a major issue. In the past few years, several image compression methods using fractal theory have been developed. These methods promise better performances for compression. One of the most efficient approaches is based on iterated function s... View full abstract»

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  • A novel adaptive two-stage detector for synchronous DS-CDMA communication systems

    Publication Year: 1997, Page(s):194 - 197
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A novel adaptive two-stage multiuser detector is proposed for synchronous DS-CDMA communication systems. This new multiuser detector employs the first-order approximate decorrelating detector as the first stage followed by an adaptive canceller. The steepest descent algorithm is used to control the weights of the adaptive canceller. Through analysis and numerical results, we show that the proposed... View full abstract»

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  • The monitoring of MPEG program signals in digital DBS system

    Publication Year: 1997, Page(s):9 - 14
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The monitoring purpose of the broadcast transmission system is to provide a means of determining how the transmission system is performing and where a fault or abnormal condition exists in the transmission chain. This paper presents the monitoring system for the digital DBS (direct broadcast satellite). This paper describes the monitoring requirements relating to which signals need to be monitored... View full abstract»

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  • Development of DCS (digital cordless-phone system)

    Publication Year: 1997, Page(s):142 - 144
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    We have developed a closed telephone system using radio waves according to the PHS standards and an Ethernet LAN according to the IEEE802.3 standards. With this system one can be directly contacted anywhere within the company, and the transfer function allows the reception of important telephone calls even when on holiday or just out of the office. We explain the problems of transmitting an audio ... View full abstract»

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  • Multicarrier techniques for wideband CDMA

    Publication Year: 1997, Page(s):234 - 237
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    This paper examines the performance of the multicarrier technique employed in a W-CDMA system in a frequency selective Rayleigh fading channel without a RAKE receiver. It is found that the multicarrier technique is simpler than the technique used in the single carrier RAKE receiver while producing a comparable performance to that of the RAKE receiver View full abstract»

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  • An application of infrared technique to control a computer keyboard for handicap

    Publication Year: 1997, Page(s):83 - 86
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A new infrared-controlled keyboard instead of the conventional computer keyboard was developed for those with hand dysfunction. The infrared transmitter with laser director was placed on the eyeglasses, and the keys of the conventional computer keyboard were all replaced by infrared receivers. In the infrared receivers we designed a modulized circuit to receive, demodulate and process the infrared... View full abstract»

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  • An Internet speech gateway server

    Publication Year: 1997, Page(s):292 - 295
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    An Internet speech gateway server is proposed to integrate the Internet and PSTN to support speech communication among users using conventional telephones connected to the PSTN. In addition to cost savings, such a system enhances the usability and versatility of the conventional telephone system and adds a new dimension to the telecommunication industry. Each gateway comprises a hardware interface... View full abstract»

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  • Servo system control in digital video disc (DVD)

    Publication Year: 1997, Page(s):114 - 117
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The storage capacity of a DVD is at least 8 times that of a compact disc (CD) with the same disc size. However, the higher density has led to narrower tracks and pitches (distances between tracks). This requires an improvement of the follow-up capability within limits which are not detrimental to its stability and speed of the system. In this paper, some techniques pertaining to the DVD servo cont... View full abstract»

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  • Sub-picture decoder architecture found

    Publication Year: 1997, Page(s):103 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    In the digital multimedia, the audio and video decoders usually use a global bus and a traffic controller to transfer data in order to reduce the hardware complexity. We developed an instantaneous sub-picture decoder architecture for the DVD system to reduce the data transfer traffic on the global bus. Using two different FIFOs and a simple state machine controller, the registers in which the cont... View full abstract»

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  • A digital satellite receiver with an advanced user friendly interface

    Publication Year: 1997, Page(s):91 - 94
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    We have successfully developed a new PerfecTV! IRD (integrated receiver decoder) with several features utilizing advanced merits of digital satellite broadcasting. This paper describes these features including the structure of the hardware and software, an algorithm of the data filtering method, and special functions that viewers can operate easily View full abstract»

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  • Robust single chip on screen display for home VCRs

    Publication Year: 1997, Page(s):122 - 124
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    This paper describes the design of a robust on-screen-display (OSD) chip with improved automatic frequency control (AFC). The built-in AFC reduces the amount of sync jitter caused by the VCR head switching pulse, video copy guard signals, etc. This chip contains the OSD circuitry which can display characters of up to 12 rows by 30 columns on display systems. The character colors can be changed by ... View full abstract»

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