US 2012/0084453 A1Published application

Adjusting audio and video synchronization of 3g tdm streams

AssigneeDialogic Corporation

InventorsMark L. Buser, Ranjan Singh

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Abstract

Systems and methods of adjusting synchronization of audio media streams and video media streams in 3G mobile communications systems that can mitigate the effects of temporal skew due to intervening processing elements associated with media channels carrying the respective media streams. The systems and methods are operative to adjust the synchronization of audio media streams and video media streams by receiving control messages that report delays due to such intervening processing elements, calculating a relative amount of delay using the reported delays for each media channel, and applying a delay factor based on the relative amount of delay to the faster media channel to place the audio media streams and the video media streams in proper temporal alignment. The delay factor is applied to the faster media channel at those locations within the mobile communications systems where the audio and video media streams are combined and/or separated for subsequent transmission.

Claims41

Dependent claims

A method of adjusting synchronization of an audio media stream and a video media stream in a mobile communications system, the audio media stream and the video media stream being carried by an audio media channel and a video media channel, respectively, at least one of the audio media channel and the video media channel having at least one media processing component associated therewith for use in processing the audio media stream and the video media stream carried by the audio media channel and the video media channel, respectively, thereby subjecting at least one of the audio media stream and the video media stream to at least one delay, the method comprising the steps of:

receiving, by at least one processor, at least one message reporting the at least one delay due to the at least one media processing component associated with the audio media channel and the video media channel;
calculating, by the at least one processor, a relative amount of delay between the audio media channel and the video media channel using the at least one delay reported by the at least one message;
determining, by the at least one processor, a faster one of the audio media channel and the video media channel, such determination being based at least in part on the at least one delay reported by the at least one message;
and
applying, at a media endpoint within the mobile communications system, a delay factor based on the relative amount of delay to the faster one of the audio media channel and the video media channel, thereby adjusting the synchronization of the audio media stream and the video media stream.

2 more elements

A system for adjusting synchronization of an audio media stream and a video media stream, the audio media stream and the video media stream being carried by an audio media channel and a video media channel, respectively, at least one of the audio media channel and the video media channel having at least one media processing component associated therewith for use in processing the audio media stream and the video media stream carried by the audio media channel and the video media channel, respectively, thereby subjecting at least one of the audio media stream and the video media stream to at least one delay, the system comprising:

at least one media endpoint operative:
to receive at least one message reporting the at least one delay due to the at least one media processing component associated with the audio media channel and the video media channel;
to calculate a relative amount of delay between the audio media channel and the video media channel using the at least one delay reported by the at least one message;
to determine a faster one of the audio media channel and the video media channel based at least in part on the at least one delay reported by the at least one message;
and
to apply a delay factor based on the relative amount of delay to the faster one of the audio media channel and the video media channel, thereby adjusting the synchronization of the audio media stream and the video media stream.

3 more elements

one or more processors operative to execute a plurality of functions:
to receive at least one control message reporting the at least one delay due to the at least one media processing component associated with the audio media channel and the video media channel;
to calculate a relative amount of delay between the audio media channel and the video media channel using the at least one delay reported by the at least one control message;
to determine a faster one of the audio media channel and the video media channel based at least in part on the at least one delay reported by the at least one control message;
and
to apply a delay factor based on the relative amount of delay to the faster one of the audio media channel and the video media channel, thereby adjusting the synchronization of the audio media stream and the video media stream.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/897,050Filed 4 Oct 2010
Published: 5 Apr 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04N 21/2368
Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL…:…
H04N 21/242
Processing of content or additional data; Elementary server operations; Server middleware: synchronisation processes, e.g. processing of PCR…
H04N 21/44209
Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times…
H04N 21/6131
Specially adapted to the downstream path of the transmission network: involving transmission via a mobile phone network

Family

US 8,606,953 B2Related patent
US 2012/0084453 A1This patent

From the US filing history. Foreign family members aren’t listed.

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