Patent ID: 8606953
Filing Date: 2013-12-10
Classification: H04N

Abstract:
1. A method of adjusting synchronization of an audio media stream and a video media stream in which at least one of the audio media stream or the video media stream is subjected to at least one delay, the method comprising the steps of: arranging at least one media processing component to manage synchronization of the audio media stream and the video media stream directed between a packet-switched network and a circuit-switched network in a mobile communications system, the at least one media processing component including at least one processor; receiving, by the at least one processor, at least one control message in a control information stream in accordance with a control protocol reporting the at least one delay associated with the audio media stream or the video media stream; calculating, by the at least one processor, a relative amount of delay between the audio media stream and the video media stream using the at least one delay reported by the at least one control message; determining, by the at least one processor, a faster one of the audio media stream and the video media stream, such determination being based at least in part on the at least one delay reported by the at least one control message; reading, by the at least one processor, at least one packet from the respective media stream carried by the faster one of the audio media stream and the video media stream, and determining, by the at least one processor, at least one arrival time of the at least one packet; and modifying, at a media endpoint within the mobile communications system, a discrete entry in the faster one of the audio media stream and the video media stream to include a delay factor based on the relative amount of delay, thereby permitting adjustment of the synchronization of the audio media stream and the video media stream.