Abstract:
An information communication method that enables communication between various devices includes: (SK71) determining a plurality of patterns of a change in luminance, by modulating a respective plurality of signals to be transmitted; and (SK72) transmitting, by each of a plurality of light emitters changing in luminance according to any one of the determined plurality of patterns of the change in luminance, a signal corresponding to the pattern, wherein in the transmitting (SK72), each of the plurality of light emitters changes in luminance at a different frequency so that light of one of two types of light different in luminance is output per a time unit predetermined for the light emitter and that the time unit predetermined for the light emitter is different from a time unit predetermined for an other one of the plurality of light emitters.
Abstract:
Provided is a transmitting method that enables communication between various devices including devices other than lightings. The transmitting method includes determining a luminance change pattern by modulating a visible light signal (SC11), switching a common switch according to the luminance change pattern, the common switch being for turning ON a plurality of light sources in common, the plurality of light sources being included in a light source group of a display and each being for representing a pixel in an image (SC12), and turning ON a first pixel switch for turning ON a first light source, to cause the first light source to be ON only for a period in which the common switch is ON and the first pixel switch is ON, to transmit the visible light signal, the first light source being one of the plurality of light sources included in the light source group (SC13).
Abstract:
One aspect of the present disclosure provides a reproduction method capable of properly reproducing a content. The reproduction method includes: receiving a visible light signal by a sensor of a terminal device from a transmitter which transmits the visible light signal by a light source changing in luminance; transmitting a request signal for requesting the content associated with the visible light signal, from the terminal device to a server; receiving, by the terminal device, the content including time points and data to be reproduced at the time points, from the server; and reproducing data included in the content and corresponding to a time point of a clock included in the terminal device.
Abstract:
A transmitter (100) that is difficult to be affected by structural constraints is a transmitter that transmits a signal to a receiver by changing an amount of light emitted, and the transmitter includes: a control unit (101) that generates a control voltage corresponding to a signal to be transmitted; a reflector (102) that reflects sunlight; and a liquid crystal board (103) that receives reflected light that is sunlight reflected by the reflector (102) and changes, according to the control voltage, the amount of light emitted toward the receiver, by allowing the reflected light to pass through the liquid crystal board (103).
Abstract:
A visible light communication method includes: obtaining a first ID identifying an area in which a receiver is present (SB3001); obtaining a second ID by the receiver through visible light communication (SB3002); and obtaining information corresponding to a third ID which is a combination of the first ID and the second ID (SB3003). For example, in the obtaining of a first ID, the first ID may be obtained by referring to a table showing correspondence between the first ID and location information obtained by the receiver and indicating a location of the receiver.
Abstract:
A video display method in which a visible light communication signal can be appropriately transmitted includes: generating a first visible light communication image that is an image having a stripe pattern for visible light communication, by encoding the visible light communication signal (SL11); displaying, in a predetermined frame, an image included in the video signal (SL12); and displaying, in the predetermined frame, the first visible light communication image sequentially thereafter an identification image that is an image having luminance uniformly lower than average luminance of the image that is displayed (SL13).
Abstract:
A visible light communication signal display method of displaying (i) an image represented by video signals and (ii) an image obtained by encoding visible light communication signals includes: encoding at least part of the visible light communication signals to generate an encoded image (S101); generating a plurality of sub-images which correspond to respective partial images obtained by dividing the encoded image and each of which (i) includes a corresponding one of the partial images and (ii) except for the corresponding partial image, is an image having a substantially uniform luminance value lower than or equal to a predetermined luminance value (S102); and displaying, in a video display period, the image represented by the video signals, and displaying the sub-images in time series in a communication period different from the video display period (S103).
Abstract:
An information communication method that enables communication between various devices includes: determining a pattern of the change in luminance by modulating the signal to be transmitted (SK31); and transmitting the signal by a light emitter changing in luminance according to the determined pattern (SK32), wherein the pattern of the change in luminance is a pattern in which one of two different luminance values occurs in each arbitrary position in a predetermined duration, and in the determining (SK31), the pattern of the change in luminance is determined so that a luminance change position in the duration is different for each of different signals to be transmitted, the luminance change position being a position at which the luminance rises or a position at which the luminance falls.
Abstract:
An information communication method that enables communication between various devices includes: setting an exposure time of an image sensor (SK21); obtaining a bright line image including a bright line, by capturing a subject that changes in luminance by the image sensor with the set exposure time (SK22); setting a longer exposure time than the exposure time (SK23); obtaining a normal captured image by image capture by the image sensor with the longer exposure time (SK24); generating a synthetic image by specifying, in the normal captured image, a part that corresponds to the bright line included in the bright line image and superimposing a signal object on the normal captured image, the signal object being an image indicating the part (SK25); displaying the synthetic image (SK26); and obtaining information by demodulating data specified by a pattern of the bright line included in the obtained bright line image (SK27).