US 12,457,377 B2
Device and method for synchronised audio-video reproduction
Guillaume Rouhart, Rueil Malmaison (FR)
Assigned to SAGEMCOM BROADBAND SAS, Rueil Malmaison (FR)
Filed by SAGEMCOM BROADBAND SAS, Rueil Malmaison (FR)
Filed on Dec. 19, 2022, as Appl. No. 18/084,304.
Claims priority of application No. 2114048 (FR), filed on Dec. 20, 2021.
Prior Publication US 2023/0199242 A1, Jun. 22, 2023
Int. Cl. H04N 21/43 (2011.01)
CPC H04N 21/4307 (2013.01) 16 Claims
OG exemplary drawing
 
1. A set top box arranged to receive an audio-video stream comprising an inbound audio stream and an inbound video stream, the set top box being intended to be connected to audio reproduction equipment via a one-directional audio link and via a communication link,
the set top box comprising a communication interface for externally connecting the audio reproduction equipment via the one-directional audio link and the communication link, and a first processing unit arranged to:
introduce identification data into the inbound audio stream to produce an outbound audio stream, the identification data comprising at least one identifier of the set top box, the identification data allowing to connect the audio reproduction equipment to the set top box via the communication link;
transmit said outbound audio stream to the audio reproduction equipment via the one-directional audio link, such that said audio reproduction equipment reproduces said outbound audio stream via at least one speaker;
receive, via the communication link, an audio latency value induced by the audio reproduction equipment, the audio latency being transmitted by the audio reproduction equipment to the set top box;
synchronise an outbound video stream, produced from the inbound video stream, with the outbound audio stream, by using the audio latency value, and reproducing the outbound video stream,
the first processing unit being arranged to synchronise the outbound video stream with the outbound audio stream by applying, to the inbound video stream, a video delay equal to the audio latency value to produce said outbound video stream.