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Method for Li-Fi Network Encoded Video Streams on LED TVs Broadcasting to Mobile Devices

IP.com Disclosure Number: IPCOM000246014D
Publication Date: 2016-Apr-26
Document File: 4 page(s) / 117K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method and system for using a light-emitting diode television (LED TV) to create a dedicated network and stream data related to what is shown on the TV, through use of a Light Fidelity (Li-Fi) network. This provides a second screen experience within which TV content is encoded with additional data that is broadcast to nearby mobile devices, all generated through the processing of an encoded video stream.

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Method for Li-Fi Network Encoded Video Streams on LED TVs Broadcasting to Mobile Devices

Li-Fi (Light Fidelity) is an alternative to Wi-Fi networks that sends data using light. That light flickers on and off at a frequency not perceptible to human eyes. It is transmitted by smart light-emitting diode (LED) lighting such as LED lights placed in the ceiling of a building. For example, a one-watt LED light bulb may simultaneously establish an Internet connection for four electronic gadgets. A light bulb with embedded microchips can produce a data rate as fast as 150Mbps.

Known technologies for synchronizing video content on a TV with secondary content on a mobile device create a second screen experience. For example for a sporting event, a second screen experience may show statistics from the game on the accompanying mobile device. However, for this to work, both the TV and mobile device must individually retrieve data from across a network (e.g., the video stream may come from
a cable box, and the sports statistics may come from a Wi-Fi connection to the Internet). Often, the two are not precisely synchronized (e.g., statistics might show that are not correlated to the action on screen).

There is an opportunity to enable a Li-Fi data transfer system with an LED TV backlight. While video content is displayed by the LED TV, the LED backlight can deliver additional data through Li-Fi transmissions. These transmissions - while not visible to the human eye - can be detected by mobile devices in view of the LED TV. The Li-Fi content can be synchronized to the video content being displayed. Examples of synchronized video content/Li-Fi transmissions include:


 More information about a product currently being advertised


 Live statistics from a sports game


 Alternate synchronized video stream (for example a wide angle shot)


 A stream of behind-the-scenes pictures as a movie plays

Described herein is a second screen experience in which the TV is the network. The television creates a Li-Fi network that receiving devices (e.g., mobile devices) can join. As such, the TV can control exactly what data is sent to a mobile device, and perfectly synchronize the data transfer.

The novel contribution is a method and system for using a light-emitting diode television (LED TV) to create a dedicated network and stream data related to what is shown on the TV, through use of a Light Fidelity (Li-Fi) network. This provides a second screen experience within which TV content is encoded with additional data that is broadcast to nearby mobile devices, all generated through the processing of an encoded video stream. The novelty comprises three points:

1. Encoding an additional layer of data into a video stream, through which the system transmits data by Li-Fi

2. Using an LED backlight on an LED TV to transmit Li-Fi data by extracting this encoding from the video stream


3. Using mobile devices to create a second screen experience within which the

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