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

Claim 9:
10. A synchronization method for synchronizing video playback equipment with at least audio playback equipment, the synchronization method comprising the steps of:
providing the video playback equipment having a screen, the at least one audio playback equipment, and a decoder equipment having a photosensitive sensor, the decoder equipment being connected to the video playback equipment and the at least one audio playback equipment;
emitting light test signals from the 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;
estimating, measuring, or acquiring a value for an audio latency induced by the at least one audio playback equipment;
calculating a latency difference from a measurement for video latency and the audio latency value, and synchronizing the video playback equipment and the at least one audio playback equipment by using the latency difference,
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.