Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1999-06-07
2002-11-12
Christensen, Andrew (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06480665
ABSTRACT:
TECHNICAL FIELD
This invention relates to a method and an apparatus for recording pictures, or a picture sequence to be more accurate, on a disk-shaped recording medium at least on a picture by picture basis and to a method and an apparatus for reproducing, if partly, the pictures recorded on such a disk-shaped recording medium as well as to such a recording medium. More particularly, the present invention relates to a novel technology of picture management and time code allocation to be used for recording a picture sequence on a disk-shaped recording medium in an editing session.
BACKGROUND ART
Time codes normally used in the operation of recording video signals on a tape-shaped recording medium (hereinafter referred to as a tape media) are allocated to frames for one-to-one correspondence in order to make use of the intrinsic property of numbers as identifiers. Thus, any particular picture frame can unequivocally be identified by way of the corresponding time code because this relationship is absolute on the tape. Additionally, the time code assigned to a picture frame remains invariable on the tape media if any editing operations are conducted before and/or after the picture frame unless the picture frame is transferred onto some other tape. Thus, it is possible to specify a number of combinations (events) of an in-point (editing in-point) and an out-point (editing out-point) and carry out that number of editing operations in a single editing session.
FIG. 20
of the accompanying drawings schematically illustrates how a foreign scene is inserted into a picture sequence in an editing operation on a tape media with their time codes invariably accompanying the picture sequence. In
FIG. 20
, both (a) and (b) show respective picture sequences to be used for an editing operation and (c) in
FIG. 20
shows a picture sequence obtained by inserting the picture sequence of (a) of
FIG. 20
into the picture sequence (b) of
FIG. 20
in the editing operation. Each of the expressions “00:00:00:00” and “00:00:50:00” in
FIG. 20
represents a time code of hour:minute:second:frame. Thus, if the picture sequence (a) of
FIG. 20
is laid on a corresponding part of the picture sequence (b) of
FIG. 20
, the edited picture sequence (c) of
FIG. 20
carries the same and identical time codes.
FIG. 21
shows in-points and out-points arranged on a tape media. More specifically, (a) in
FIG. 21
shows in-points and out-points arranged on a picture sequence and (b) in
FIG. 21
shows a picture sequence obtained by inserting picture sequences, or foreign scenes, into the picture sequence of (a) in
FIG. 21
respectively by referring to the in-points and the out-points of(a) in FIG.
21
. It may be appreciated that a plurality of combinations (events) of an in-point and an out-point are arranged at a time for an editing session of FIG.
21
. More specifically,
FIG. 21
shows that a total of three combinations (events) of in-point IN
1
and out-point OUT
1
through in-point IN
3
and out-point OUT
3
are specified and the editing operations for the first two combinations (event of in-point IN
1
and out-point OUT
1
and that of in-point IN
2
and out-point OUT
2
) have been executed. Again, each of the expressions “00:00: 00:00” and “00:00:50:00” in
FIG. 21
represents a time code of hour:minute: second:frame. Thus, if a plurality of events are arranged on the picture sequence (a) of FIG.
21
and foreign scenes are laid on corresponding parts of the picture sequence (a) of
FIG. 21
, the edited picture sequence (b) of
FIG. 20
carries the same and identical time codes. In other words, editing operations can be carried out successfully because the time codes on the tape media remain invariable throughout any editing sessions.
To summarize, the time code system of a tape media has the following functional features.
(1) The picture frames and the time codes have a relationship of one-to-one correspondence on the tape media.
(2) The relationship of (1) is maintained after any editing operations that may be conducted before and/or after a particular picture frame.
(3) The time codes are used to identify particular respective picture frames in editing sessions (not only by the user but also inside the editing equipment).
(4) The time codes notifies the user of the duration of time of picture reproduction from the head of the tape media (so that the remaining time that is available for reproducing picture frames from or recording picture frames on the tape media can be known).
It will be appreciated that the feature of searching out any desired particular picture frames by means of the time codes, or keys, allocated to the picture frames for one-to-one correspondence as described above by referring to a tape media may also be desirable for a disk-shaped medium (hereinafter referred to as a disk media).
On the other hand, the disk media is randomly accessible and hence has the following novel features that are specific to the disk media and not found in the tape media.
Firstly, the conventional tape media is not adapted to cutting out or erasing part of a bit stream of a picture sequence recorded on it. More specifically, it is not adapted to cutting out (or erasing) a particular scene recorded on it and having a certain length and connecting the preceding boundary and the succeeding boundary of the cut out (or erased) particular scene. To the contrary, it is possible to cut out or erase part of a bit stream of a picture sequence recorded on a disk media. If such an editing operation is to be carried out on a tape media, a blank tape and a tape recorder have to be brought in place in advance. Then, all the picture sequence following the particular scene has to be copied on the blank tape and copied back onto the original tape so as to make it directly connect with the end of the scene that immediately preceded the particular scene. It will be appreciated that this is a time consuming tedious operation.
FIG. 22
schematically illustrates how a particular scene is cut out from a disk media. In
FIG. 22
, (a) shows a picture sequence and the shaded area from 00:00:00:00 to 00:00:05:00 represents the particular scene to be cut out. In
FIG. 22
, (b) shows the picture sequence obtained by cutting out the particular scene of (a) and connecting the preceding boundary and the succeeding boundary of the particular scene. With a disk media to be used for recording pictures, it is easy to cut out part of a picture sequence and connecting the front end and the rear end of the cut out part.
Secondly, with a technique referred to insertion editing used for the tape media, a particular scene is not inserted (in the proper sense of the word) into but laid on the picture sequence already recorded on the tape media. It is in fact an operation not of “inserting” a scene into a picture sequence but of partly “overlaying” a picture sequence with a scene. In the case of the disk media, to the contrary, it is possible to realize insertion editing (in the proper sense of the word) that is not an “overlaying” operation. In order (not to lay a scene on but) to insert a scene into a picture sequence already recorded on a tape media in an editing operation, a blank tape and a tape recorder have to be brought in place in advance as described above for cutting out a scene. Then, all the picture sequence that is to follow the particular scene to be inserted has to be copied on the blank tape and copied back onto the original tape after the particular scene is laid on the predetermined stretch of the tape so as to make it directly connect with the end of the scene that has been laid on the stretch. It will be appreciated that this is also a time consuming tedious operation.
Thirdly, with the disk media, it is easy to edit by moving part of a picture sequence because the disk media is adapted to cutting out part of a bit stream and inserting a scene (in the proper sense of the word) into a picture sequence without overlaying it with the scene. In other words, the operation of moving a particular scene in a picture sequence in an editin
Christensen Andrew
Frommer William S.
Frommer & Lawrence & Haug LLP
Onuaku Christopher
Smid Dennis M.
LandOfFree
Disc recording method and device, disc reproducing method... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disc recording method and device, disc reproducing method..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disc recording method and device, disc reproducing method... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2986241