H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 17/00 (2006.01)
Patent
CA 2551998
Methods and apparatus to distinguish a signal originating from a local device (102) from a broadcast signal are disclosed. A disclosed system classifies a video component of an audio-video signal by analyzing a histogram of pixel data (408), analyzing a quality factor (409), and/or attempting to detect embedded data (410) in the video component. The disclosed system also classifies an audio component of the audio-video signal by attempting to detect embedded audio data and/or analyzing waveform energy associated with the audio component. A source of the audio-video signal is determined based on the video classification and/or the audio classification.
L'invention porte sur des procédés et un appareil permettant de distinguer un signal provenant d'un dispositif local, d'un signal radiodiffusé. A cet effet le système de l'invention classe la composante vidéo d'un signal audio/vidéo: en analysant l'histogramme des données de pixel; en analysant un facteur de qualité; et/ou en tentant de détecter des données enfouies dans la composante vidéo. Ledit système classe également la composante audio d'un signal audio/vidéo en tentant d'y détecter des données audio enfouies, et/ou en analysant l'énergie des formes d'ondes associées à la composante audio. On peut ainsi déterminer la source d'un signal audio/vidéo en fonction du classement vidéo et/ou du classement audio.
Nelson Dan
Ramaswamy Arun
Nielsen Media Research Inc.
Rowand Intellectual Property Law
The Nielsen Company (us) Llc
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