TETRIS: Smartphone-to-Smartphone Screen-Based Visible Light Communication

Stafford, Matthew; Rogers, Adriana; Wu, Shela; Carver, Charles J.; Artan, N. Sertac; Dong, Ziqian

doi:10.1109/mass.2017.101

Cited by 16 publications

(6 citation statements)

References 6 publications

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“…A data rate of 15 kbps was achieved for multi-color 8x8 screen display [15]. For the distance of 15cm, a throughput of 311.22 Kbps with an error rate of 10% was achieved for TETRIS [16] using four colors, 10 fps frame rate, and 14 × 14 pixel color blocks. Based on similar work, the proposed system in paper [17] demonstrated bandwidth of 0.7 Mbps for a short distance of 20cm.…”

Section: Related Workmentioning

confidence: 99%

A Nested Texture Inspired Novel Image Pattern Based Optical Camera Communication

Salvi

Vasantha

2022

IEEE Access

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In Optical Camera Communication, pattern recognition is a vital component of display-based communication. However, as the distance between the source and camera increases, the visibility of the pattern reduces. Decoding each pattern requires extensive computational resources. This paper proposes a nested texture-inspired novel binary hierarchical image pattern classification-based modulation for optical camera communication to provide efficient pattern classification and achieve longer communication distance. Custom 8x8 patterns are generated at the transmitter based on input data using nested outer and inner patterns. On the receiver side, multi-threaded pattern matching is performed simultaneously for inner and outer patterns for faster decoding. A simulator is built to test the performance of linear search and two variants of binary search for pattern matching. A hardware prototype and Matlab app are designed to perform experiments to test the performance of the proposed technique in a real-world environment. Experiments were conducted to select optimal camera parameter values for the best Signal to Noise Ratio(SNR) and to analyze the impact of pattern intensity profile on decoding at various distances. The proposed pattern communication technique showcased 48.6%, and 42.5% improvement in Bit Error Ratio(BER) compared to Data Matrix and QR Code Pattern-based communication techniques, respectively.

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Section: Related Workmentioning

confidence: 99%

A Nested Texture Inspired Novel Image Pattern Based Optical Camera Communication

Salvi

Vasantha

2022

IEEE Access

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“…However, one will quickly realize that the Tetris that they speak of is not the game so beloved by humanity, but rather "Tetris is an Asynchronous Byzantine Fault Tolerance consensus algorithm designed for next generation high-throughput permission and permissionless blockchain." In continuing though the literature, one quickly realizes that the name "Tetris" has been appropriated mercilessly to entitle and describe things that are not directly about the famed game, but are either meant to invoke the idea of putting pieces together or are just an acronym that the authors found cute, no doubt in the hopes that a small fraction of the shine of the real and true Tetris might befall upon their work [80,99,100,92,95,51,159,148,46,126,55,136,20,126,96,152,153,4,83,58,34,91,97,52,161,87,157,27,160]. Perhaps the most useful of the Tetris-inspired research has been the creation of a floor cleaning robot which is hinged and can change shape to various Tetris pieces [117,82,118].…”

Section: Related Workmentioning

confidence: 99%

How Fast Can We Play Tetris Greedily With Rectangular Pieces?

Dallant¹,

Iacono²

2022

Preprint

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Consider a variant of Tetris played on a board of width w and infinite height, where the pieces are axis-aligned rectangles of arbitrary integer dimensions, the pieces can only be moved before letting them drop, and a row does not disappear once it is full. Suppose we want to follow a greedy strategy: let each rectangle fall where it will end up the lowest given the current state of the board. To do so, we want a data structure which can always suggest a greedy move. In other words, we want a data structure which maintains a set of O(n) rectangles, supports queries which return where to drop the rectangle, and updates which insert a rectangle dropped at a certain position and return the height of the highest point in the updated set of rectangles. We show via a reduction to the Multiphase problem [Pătraşcu, 2010] that on a board of width w = Θ(n), if the OMv conjecture [Henzinger et al., 2015] is true, then both operations cannot be supported in time O(n 1/2− ) simultaneously. The reduction also implies polynomial bounds from the 3-SUM conjecture and the APSP conjecture. On the other hand, we show that there is a data structure supporting both operations in O(n 1/2 log 3/2 n) time on boards of width n O(1) , matching the lower bound up to a n o(1) factor.

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“…On the other hand, there are few studies on uplink SCC. Regarding the uplink SCC from the smartphone screen to the indoor camera, there is no study other than the shortrange smartphone-to-smartphone SCC from one smartphone screen to another smartphone camera [9], [10], [11]. In the short-range uplink SCC, the transmission distance is short and not much longer than the screen size, too.…”

Section: Introductionmentioning

confidence: 99%

Space Division Multiplexing Using High-Luminance Cell-Size Reduction Arrangement for Low-Luminance Smartphone Screen to Camera Uplink Communication

Kawade

Chujo

Kobayashi

2023

IEICE Trans. Fundamentals

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To simultaneously enhance data rate and physical layer security (PLS) for low-luminance smartphone screen to camera uplink communication, space division multiplexing using high-luminance cellsize reduction arrangement is numerically analyzed and experimentally verified. The uplink consists of a low-luminance smartphone screen and an indoor telephoto camera at a long distance of 3.5 meters. The highluminance cell-size reduction arrangement avoids the influence of spatial inter-symbol interference (ISI) and ambient light to obtain a stable lowluminance screen. To reduce the screen luminance without decreasing the screen pixel value, the arrangement reduces only the high-luminance cell area while keeping the cell spacing. In this study, two technical issues related to high-luminance cell-size reduction arrangement are solved. First, a numerical analysis and experimental results show that the high-luminance cell-size reduction arrangement is more effective in reducing the spatial ISI at low luminance than the conventional low-luminance cell arrangement. Second, in view point of PLS enhancement at wide angles, symbol error rate should be low in front of the screen and high at wide angles. A numerical analysis and experimental results show that the high-luminance cell-size reduction arrangement is more suitable for enhancing PLS at wide angles than the conventional low-luminance cell arrangement.

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TETRIS: Smartphone-to-Smartphone Screen-Based Visible Light Communication

Cited by 16 publications

References 6 publications

A Nested Texture Inspired Novel Image Pattern Based Optical Camera Communication

A Nested Texture Inspired Novel Image Pattern Based Optical Camera Communication

How Fast Can We Play Tetris Greedily With Rectangular Pieces?

Space Division Multiplexing Using High-Luminance Cell-Size Reduction Arrangement for Low-Luminance Smartphone Screen to Camera Uplink Communication

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