DETECTION OF AUDIO TO VIDEO SYNCHRONIZATION ERRORS

A method of detecting the presence of unacceptable levels of audio to video synchronization errors in audio-video streams is provided. The method includes capturing, at a testing module, a test audio-video stream from a first source and a reference audio-video stream from a second source, extracting...

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Hauptverfasser:	BABBAR GAUTAM, HILLEGASS DANIEL, PANDURAGAN JANAKIRAM AZHUNJIPAKKAM, MASER GREGORY F, MALYSHEVA OLGA, BRICE PIERRE
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	A method of detecting the presence of unacceptable levels of audio to video synchronization errors in audio-video streams is provided. The method includes capturing, at a testing module, a test audio-video stream from a first source and a reference audio-video stream from a second source, extracting a test audio stream and a test video stream from the test audio-video stream, extracting a reference audio stream and a reference video stream from the reference audio-video stream, determining a highest correlation value between the test audio stream and the reference audio stream using cross-correlation, and determining that the test audio-video stream has an unacceptable level of AV-sync errors when the highest correlation value is above a preset correlation threshold.