A Symbiotic Digital Signage system based on display to display communication

Hossain, Mohammad Arif; Lee, Yong Tae; Lee, Hyun–Woo; Lyu, Won; Hong, Chang Hyun; Nguyen, Tuan-Anh; Le, Nam-Tuan; Jang, Yeong Min

doi:10.1109/icufn.2015.7182516

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…This scheme functions as a dynamic colored QR code and performs synchronization. In addition to the 2D-sequential coding, an invisible watermarking was proposed to reduce discomfort from perceptible flickers by varying the color chromaticity slightly as part of modulation [12,54]. The transmission frame was divided into m × n embedded cells as shown in Figure 14 with 4 × 2 embedded cells.…”

Section: Nyquist Sampling Modulationmentioning

confidence: 99%

Optical Camera Communications: Principles, Modulations, Potential and Challenges

et al. 2020

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Optical wireless communications (OWC) are emerging as cost-effective and practical solutions to the congested radio frequency-based wireless technologies. As part of OWC, optical camera communications (OCC) have become very attractive, considering recent developments in cameras and the use of fitted cameras in smart devices. OCC together with visible light communications (VLC) is considered within the framework of the IEEE 802.15.7m standardization. OCCs based on both organic and inorganic light sources as well as cameras are being considered for low-rate transmissions and localization in indoor as well as outdoor short-range applications and within the framework of the IEEE 802.15.7m standardization together with VLC. This paper introduces the underlying principles of OCC and gives a comprehensive overview of this emerging technology with recent standardization activities in OCC. It also outlines the key technical issues such as mobility, coverage, interference, performance enhancement, etc. Future research directions and open issues are also presented.

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Section: Nyquist Sampling Modulationmentioning

confidence: 99%

Optical Camera Communications: Principles, Modulations, Potential and Challenges

et al. 2020

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“…Offset-VPPM by SNUST [6]  VPPM by Intel Corp. [6] Phase-Shift-Keying (PSK)  Hybrid FSK/PSK by Kookmin University [6]  Spatial 2-PSK by Kookmin University [6] Abundant research has carried out in the last few years on the applications of OWC technology such as indoor localization [14,15] vehicular communication [16,17], vehicle positioning [18,19], resource allocation [20], etc. Other techniques based on screen and camera communication for digital signage and other applications have also been proposed, which have not included the idea of OWC technology [21][22][23]. Considering the frame rate variation along with the simplicity of encoding and decoding procedures we have designed and implemented a novel compatible modulation and coding scheme for image sensor communication which is an extension of our previous work [24].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of a Novel Compatible Encoding Scheme in the Time Domain for Image Sensor Communication

Nguyen

Hossain

Jang

2016

Sensors

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This paper presents a modulation scheme in the time domain based on On-Off-Keying and proposes various compatible supports for different types of image sensors. The content of this article is a sub-proposal to the IEEE 802.15.7r1 Task Group (TG7r1) aimed at Optical Wireless Communication (OWC) using an image sensor as the receiver. The compatibility support is indispensable for Image Sensor Communications (ISC) because the rolling shutter image sensors currently available have different frame rates, shutter speeds, sampling rates, and resolutions. However, focusing on unidirectional communications (i.e., data broadcasting, beacons), an asynchronous communication prototype is also discussed in the paper. Due to the physical limitations associated with typical image sensors (including low and varying frame rates, long exposures, and low shutter speeds), the link speed performance is critically considered. Based on the practical measurement of camera response to modulated light, an operating frequency range is suggested along with the similar system architecture, decoding procedure, and algorithms. A significant feature of our novel data frame structure is that it can support both typical frame rate cameras (in the oversampling mode) as well as very low frame rate cameras (in the error detection mode for a camera whose frame rate is lower than the transmission packet rate). A high frame rate camera, i.e., no less than 20 fps, is supported in an oversampling mode in which a majority voting scheme for decoding data is applied. A low frame rate camera, i.e., when the frame rate drops to less than 20 fps at some certain time, is supported by an error detection mode in which any missing data sub-packet is detected in decoding and later corrected by external code. Numerical results and valuable analysis are also included to indicate the capability of the proposed schemes.

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Color transmission in image sensor communications using display and camera

Nguyen

Hossain

Hong

et al. 2015

2015 International Conference on Information and Communication Technology Convergence (ICTC)

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Intention for using color in image sensor communication (ISC) has become trendy issue due to its specific limitations. This paper suggests a color transmission technology to minimize the blur effects in the ISC. We propose an asynchronous communication using display as a transmitter and rolling shutter camera as a receiver to measure the blur effect. The interruption due to the blur effects in the communication system has been analyzed. The performance of implemented system has been illustrated with respect to signal to noise ratio (SNR) as well as bit error rate (BER) with a view to estimating the effects of blur on the communication system. Keywordsimage sensor communication (ISC), unidirectional ISC, asynchronous communication, display-torolling shutter camera, blur effect.

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A Symbiotic Digital Signage system based on display to display communication

Cited by 7 publications

References 7 publications

Optical Camera Communications: Principles, Modulations, Potential and Challenges

Optical Camera Communications: Principles, Modulations, Potential and Challenges

Design and Implementation of a Novel Compatible Encoding Scheme in the Time Domain for Image Sensor Communication

Color transmission in image sensor communications using display and camera

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