Patent ID: 11956417
Assignee: SAGEMCOM BROADBAND SAS
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A measurement method for measuring video latency induced by video playback equipment,
the measurement method being performed in a decoder equipment and including a measurement stage comprising the steps of:
providing the video playback equipment having the screen, and the decoder equipment having a photosensitive sensor, the decoder equipment being connected to the video playback equipment;
emitting light test signals from a screen of the video playback equipment;
capturing, by the photosensitive sensor, reflected light of the light test signals being reflected on at least one surface of surroundings of the screen of the video playback equipment, said surface not being a surface of the screen, so that the reflected light is not captured directly from the screen;
acquiring measurement signals produced by the photosensitive sensor from the captured reflected light, and analyzing the measurement signals; and
obtaining a video latency measurement based on the measurement signals,
wherein the video latency corresponds to a difference in time between a video signal being made available to the video playback equipment and a corresponding image being displayed on a screen of the video playback equipment.