Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1999-07-14
2001-07-17
Tran, Thai (Department: 2715)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06263149
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a method of editing a first and a second digital video information signal in an edit apparatus, where the second video information signal may be the same video information signal as the first video information signal, the first and second digital video information signal being recorded on a record carrier, such as an optical disc, as well as to an editing apparatus for carrying out the method. Such method is described in U.S. patent application Ser. No. 09/226,329 hereby incorporated herein in whole by reference in the name of the same applicant.
The above-identified patent application describes how to edit two digital video information signals that are recorded on a record carrier, such as an optical disc. The video information signals are recorded on the record carrier in the form of blocks of information, called fragments, having a size of 4 MB, as an example. The invention aims at improving the editing method, such that the results of editing become visually available, more quickly.
SUMMARY OF THE INVENTION
The method in accordance with the invention comprises the steps of editing a first and a second digital video information signal in an edit apparatus, where the second video information signal may be the same video information signal as the first video information signal, the first and second digital video information signal being recorded on a record carrier, such as an optical disc, the method comprising the steps of
(a) reading a first block of information of the first digital information signal that is located around an edit point to be determined in the first digital information signal from the record carrier into an internal memory of the apparatus,
(b) outputting the first block of information from the apparatus, for display,
(c) establishing an ‘out’ position in the first block of information as the edit point in the first digital video information signal,
(d) reading a second block of information of the second digital video information signal that is located around an edit point to be determined in the second digital video information signal from the record carrier into the internal memory of the apparatus,
(e) outputting the second block of information of the second digital video information signal from the apparatus, for display,
(f) establishing an ‘in’ position in the second block of information as the edit point in the second digital video information signal,
(g) processing a portion of the first block of information that precedes and may include the ‘out’ position, and a portion of the second block of information that follows and may include the ‘in’ position into a composite block of information,
(h) outputting the composite block of information from the apparatus, for display, prior to
(i) recording at least a portion of the composite block of information on the record carrier.
More specifically, the step (g) includes the substeps of
(g1) determining an exit point earlier in the first block of information than the ‘out’ position,
(g2) determining an entry point later in the second block of information than the ‘in’ position,
(g3) creating a bridging block of information from the information in the first block of information between the exit point and the ‘out’ position and from the information in the second block of information between the ‘in’ position and the entry point, the composite block of information comprising a portion of the first block of information that directly precedes the exit point, the bridging block of information and a portion of the second block of information that directly follows the entry point.
The invention is based on the following recognition. The above identified patent application describes how editing is performed. More specifically, edit points in the first and second digital video information signals are established, those edit points identifying the positions in the first digital information signal where the first digital information signal is left (the so called ‘out’ position) and where the second digital video information signal is entered (the so-called ‘in’ position). A bridging fragment is created to cover the jump from an earlier exit point (earlier than the ‘out’ position) in the first video information signal to a later entry point (later than the ‘in’ position) in the second video information signal, and the bridging fragment is recorded on the record carrier. Thereafter, reproduction of the edited video information signal from the record carrier can be carried out to investigate the result of the edit step. The processing and the subsequent recording of the bridging fragment requires a sufficient amount of time, so that the result of the edit operation cannot be directly checked. In accordance with the invention, the display of the edited video signal is enabled, directly from the internal memory, that is, prior to recording the bridging block of information on the record carrier, by retrieving the bridging fragment and eventually earlier information from the first video information signal and later information from the second video information signal, from the internal memory.
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Belk Michael E.
Tran Thai
U.S. Philips Corporation
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