Visual improvement of video stream transitions

H - Electricity – 04 – N

Patent

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Details

H04N 21/2387 (2011.01) H04N 21/2318 (2011.01)

Patent

CA 2397634

Four techniques which result in the visual improvement (Fig. 7) of transitions (510) between video streams with a same packet identifier (PID). The first technique includes two methods: a method for pre-conditioning video stream data for storage on disks (501-504); and a method for transitioning between video streams which utilizes the pre-conditioning. The second technique involves a method for transitioning between video streams where timing information in the new stream is modified so as to be consistent with timing information in the old stream. The third technique involves a method for transitioning between video streams where packets in the old stream are replaced by picture repeat packets. The fourth technique involves a method for transitioning between video streams where packets in the old stream are replaced by null packets.

L'invention concerne quatre techniques d'amélioration visuelle (figure) de transitions (510) entre flux vidéo possédant le même identificateur de paquets (PID). La première technique comprend deux processus: un processus de prétraitement de données de flux vidéo, aux fins de stockage sur disques (501-504), et un processus d'établissement de transitions entre des flux vidéo, mettant en oeuvre un prétraitement. La seconde technique consiste à établir des transitions entre des flux vidéo dans lesquels les informations de synchronisation du nouveau flux sont modifiées de manière à être compatibles avec les informations de synchronisation de l'ancien flux. La troisième technique consiste à établir des transitions entre des flux vidéo dans lesquels les paquets de l'ancien flux sont remplacés par des paquets de répétition d'images. La quatrième technique consiste à établir des transitions entre des flux vidéo dans lesquels les paquets de l'ancien flux sont remplacés par des paquets vides.

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