Antenna selection in lte/lte-a networks with unlicensed spectrum

Abstract

The present invention relates to a system and a method for synchronizing a video signal and a wireless sensor signal. One embodiment of the present invention provides a system for synchronizing a video signal and a wireless sensor signal, the system comprising: a camera device which is provided with a first synchronization clock, generates a video signal by photographing an object, and transmits, to a computing device side, the video signal into which a first time tag is inserted by the first synchronization clock at every first unit time; a wireless sensor which is provided with a second synchronization clock and a wireless communication module, generates a sensor signal by sensing a changing state value from the object or from outside, and transmits, to a sensor signal collecting unit side via the wireless communication module, the video signal into which a second time tag is inserted by the second synchronization clock at every second unit time; a zero-point setting device for transmitting a zero-point setting signal containing reference time information to the camera device side and the wireless sensor side over a wired network; a sensor signal collecting unit which collects a sensor signal that is wirelessly transmitted from the wireless sensor and transmits the sensor signal to the computing device side; and a computing device which receives the video signal and the sensor signal and performs synchronization between the video signal and the sensor signal, wherein a local time of the first synchronization clock and the second synchronization clock is changed to the reference time according to the zero-setting signal, and the computing device performs synchronization of the video signal and the sensor signal on the basis of time information contained in the first time tag and the second time tag.

Description

technical field [0001] The present invention relates to a system and method for synchronizing multiple signals, and more specifically relates to a system and method for synchronizing sensor signals and image signals transmitted wirelessly. Background technique [0002] Recently, with the rapid development of video and communication technologies, attempts are being made to synchronize video signals obtained by photographing moving subjects with sensor signals. [0003] Specifically, unless a plurality of signals are synchronized, it cannot be confirmed whether an event included in an arbitrary video signal and an event included in a sensor signal are the same event, in other words, whether they are at the same time. Therefore, in order to synthesize various signals that vary according to time to derive useful information, it is necessary to make the time between signals transmitted from a plurality of signal aggregation devices connected to the network (network) accurate with...

AI Technical Summary

Problems solved by technology

However, the prior art has a problem in that it calculates an error caused by transmission delay time etc. due to wireless transmission of sensor signals, and must be accompanied by a process of correcting time information based on the calculated error, due to the above relationship However, the amount of data calculation for synchronization is too much, and in order to calculate the error, it is necessary to use a wired network such as a cable to repeatedly transmit the reference time information to the wireless sensor side. Due to the above inherent relationship, it cannot be applied to sports. Actual measurement environment such as posture analysis

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