System and method for automatically determining latency of components in a video system and synchronizing components

摘要

There is provided a system and method for determining the latency of components of a video system comprising a video latency determination device. The video latency determination device includes a memory and a processor configured to detect a test video pattern appearing at a known time in the video signal at the video output of each component, calculate the latency of each component based on the known time of the test video pattern and the time at which the video latency determination device detects the test video pattern, and store the latency of each component in the memory.

主权项

1. A video latency determination device for use in a video system and for connection to a video output of each of a video file server and a video switcher of the video system, the video file server including a video file having a test video pattern starting at a video pattern start time in the video file, the video system also including a control device for controlling the video file server and the video switcher, and the control device being in communication with the video latency determination device, the video latency determination device comprising:
a memory; and a processor configured to:
receive, at a first time, a control signal from the control device instructing the video file server to transmit a video signal using the video file having the test video pattern starting at the video pattern start time in the video file, the control signal further instructing the video switcher to switch to the video input of the video switcher for receiving the video signal from the video output of the video file server and outputting the video signal from the video output of the video switcher;detect, in response to the control signal, the test video pattern of the video signal at the video output of the video file server at a first detected time measured from the first time;determine a video file server latency based on the first time, the video pattern start time, and the first detected time;store the video file server latency in the memory;detect the test video pattern of the video signal at the video output of the video switcher at a second detected time measured from the first time;determine a video switcher latency based on the first time, the video pattern start time, the video file server latency and the second detected time; andstore the video switcher latency in the memory.