Patent ID: 8717499

Claim:
A method of measuring a temporal offset between video content and audio content in a system for transmitting video, the video being subject to transmission over a media channel, the method comprising the steps of: prior to transmission of the video over the media channel: obtaining reference audio fingerprint data from the audio content and reference video fingerprint data from the video content, wherein each of the reference audio fingerprint data and the reference video fingerprint data includes associated time stamp data; and subsequent to the transmission of the video over the media channel: obtaining target audio fingerprint data from the audio content and target video fingerprint data from the video content, wherein each of the target audio fingerprint data and the target video fingerprint data includes associated time stamp data; and determining a temporal offset between the video content and the audio content based at least on the time stamp data associated with the reference video fingerprint data, the time stamp data associated with the target video fingerprint data, the time stamp data associated with the reference audio fingerprint data, and the time stamp data associated with the target audio fingerprint data.