Synchronous Control System for Live Event Lighting
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Solution Overview
Problem
Synchronizing video/audio signals with lighting control signals in a remote live viewing site is challenging due to network delays and signal processing differences, making it difficult to achieve the same level of synchronization as at a live event site.
Innovation Solution
A synchronous control system that includes a transmission device which receives a lighting control signal, adds a predetermined offset time to the receipt time, and transmits it to a reception device at the live viewing site, ensuring the lighting device is controlled in sync with video and audio signals, using the MMT protocol and Network Time Protocol for time synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control signals are transmitted through a network from the live event site to the live viewing site, then remote live viewing is enabled, but network delay and signal processing time differences cause synchronization issues between video/audio and lighting control
Solution Approach 1:
The system performs preliminary actions by calculating and setting output times in advance. The transmission device calculates the output time by adding a predetermined period to the receipt time, and this calculated output time is embedded in the control signal before transmission. This preliminary time calculation compensates for network delays and signal processing differences, enabling synchronized lighting control at the remote live viewing site without real-time adjustment.
2Reliability
If lighting control is synchronized locally at the live event site, then synchronization with video/audio is achieved, but the system cannot be applied to remote live viewing sites
Solution Approach 1:
The transmission device acts as an intermediary that bridges the live event site and the remote live viewing site. It receives control signals from the live event site, calculates appropriate output times considering network delays, embeds these calculated output times in the control signals, and transmits them to the remote site. This intermediary function enables synchronized lighting control at remote locations without requiring local synchronization infrastructure.
3Speed
If control signals are transmitted with real-time processing, then response speed is fast, but network delay and processing time differences cause timing mismatches
Solution Approach 1:
The system performs preliminary time calculation and compensation before control signal transmission. The transmission device calculates the output time by adding a predetermined period to the receipt time, embedding this pre-calculated timing information in the control signal. This preliminary action maintains fast response speed while compensating for network delays and processing time differences, preventing synchronization timing offsets.
Data Source
AI summary
A synchronous control system is provided. A transmission device 1 includes a reception unit 11 that receives a control signal for a lighting device in a live event site and a transmission unit 13 that transmits, to a reception device in a live viewing site, the control signal to which an output time is appended. The output time is obtained by adding a predetermined period of time to a receipt time at which the control signal is received. A reception device 2 includes a reception unit 21 that receives the control signal to which the output time is appended, and an output control unit 13 that outputs the control signal to a lighting device 6 in the live viewing site at the output time, and allows the control of the lighting device 6 to synchronize with at least one of video and audio to be played in the live viewing site.