U.S. Philips Corporation

Marco P Ceccarelli

Wilhelmus H Bruls

A method for navigating through video matter by means of displaying a plurality of key-frames in parallel, whilst allowing selective accessing of displayed keyframes for thereupon controlling actual access to said video matter as representing a mapping of so accessed keyframes, said method being characterized by allowing within a single user interface organization to select between a first operative mode for arranging keyframes in a temporally ordered manner on the screen and a second operative mode for arranging keyframes with multiple selectible granularities between contiguous keyframes as displayed.

Method and device for navigating through video matter by means of displaying a plurality of key-frames in parallel

The invention aims at recording a data reduced digital video signal on a longitudinal record carrier (40) by a recording apparatus of the helical scan type. The apparatus is adapted to generate signal blocks of information of the trick play video signal and to generate signal blocks of information of the data reduced digital video signal. A signal block of information of the data reduced digital video signal comprising a first frame (I-frame) and at least one second frame (B- or P frame) of the data reduced digital video signal. The apparatus is adapted to record each time after each other a signal block of information of the digital trick play video signal and a signal block of information of the data reduced digital video signal on the record carrier. A signal block of information of the trick play video signal is recorded in n subsequent tracks (T.sub.2) on the record carrier, where n is a constant integer for which holds n.gtoreq.1, and the directly succeeding signal block of information of the data reduced digital video signal is recorded in m subsequent tracks (T.sub.3 to T.sub.25) directly following the n tracks, where m is an integer larger than 1. The apparatus is further adapted to record the signal block of information of the data reduced digital video signal in such a way in said m tracks that, viewed in the reproduction direction of the tracks on the record carrier, the first frame (I-frame) contained in said signal block is recorded first in the m tracks following the n tracks comprising the trick play video signal and the at least one second frame (B- or P frame) in the signal block is recorded thereafter in the m tracks. m may be variable for subsequent signal blocks of information of the data reduced digital video signal to be recorded on the record carrier. Further, the signal block of information of the data reduced digital video signal recorded in the m subsequent tracks of a group of n+m tracks includes complete frames of information of the data reduced digital video signal. The apparatus is further adapted to carry out an edit mode of operation, where the n trick play tracks (T.sub.2) are used as edit gaps.

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Eindhoven, Netherlands

Marco P Ceccarelli