Patent ID: 8111759
Filing Date: 2012-02-07
Classification: G11B

Abstract:
1. A method for authoring or generating or coding an audio/video data stream that represents a video signal and one or more audio signals, said video signal having 24 Hz video frame frequency and said audio signal or signals having original speed, wherein said authoring or generating or coding comprises the following steps: encoding the video signal in 24p format and optionally adding 3-2 pull-down data items for facilitating a playback with 60 Hz or nearly 60 Hz field frequency, and encoding the one or more audio signals according to said original speed; encoding sub-title data, and generating menus related to at least one of said video signal, one or more audio signal and sub-title data; generating additional data items for facilitating a subjectively synchronized presentation of said audio and video signals with an average field frequency lying in the range between 48 Hz and 50 Hz, denoted 50i format, thereby including in said audio/video data stream video repetition information items which can be used in a presentation unit for said video and audio signals for controlling video signal field or frame repetition, and including audio dropping information items which can be used in said presentation unit for controlling audio signal frame dropping, this generating step comprising the further steps: incorporating said 50i format additional data items into related data fields of said audio/video data stream or a copy of said audio/video data stream.