Decoding method and decoding player and recording medium

Details Decoding method and decoding player and recording medium Decoding method and decoding player and recording medium

1998-08-05

2002-01-22

Garber, Wendy R. (Department: 2615)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C386S349000, C386S349000, C360S013000

Reexamination Certificate

active

06341192

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an edit point decoding method suitable for use with moving picture image signals, sound signals, etc. edited and recorded in a random access recording medium such as a magneto-optic disc, a decoding player adapted to read a recording medium in which such edited signals are recorded, and a recording medium having such edited signals recorded therein.
2. Description of Related Art
Assume here that, for example, a moving picture image signal, sound signal, etc. having a length of time of 1 hour, 2 minutes and 3 seconds and consisting of 4 frames are recorded in a fresh recording medium (random access or accessible recording medium such as magneto-optic disc or the like; it will be referred to simply as “disc” hereafter). The recorded data are laid on the disc as shown in
FIGS. 1A and 1B
.
FIG. 1A
shows three recording areas A, B and C on the disc. The recording areas are contiguous like a line extending from the innermost perimeter of the disc to the outermost perimeter.
FIG. 1B
shows only one of the three areas, say, the area B.
As mentioned above, the entire disc consists of the three areas A, B and C. The area A is the innermost area on the disc. The areas B and C extend from the area A toward the outermost perimeter of the disc.
The area A shown in
FIG. 1A
has recorded therein an information for managing the information recorded on the disc, namely, a so-called “TOC (Table Of Contents)”. The TOC includes at least “entries” and a plurality of “areas for describing the entries”. Each of the entries specifies at least information such as “start address”, “end address”, “start time code”, “end time code”, and “next entry”.
The “start address” has described therein a leading address of an area managed by the entries. The leading address is an address determined by a physical medium, or an address of a file system, configured on a physical address, as the case may be.
The “end address” has described therein an end address of the area managed by an entry.
The “start time code” has described therein a start time code of a moving picture image data recorded in the area managed by the entries.
The “end time code” has described therein an end time code of a moving picture image data recorded in the area managed by the entries.
The “next entry” has described therein a number for a further entry, if any, to be reproduced during disc reading. If there exists no next entry to be reproduced, “Null” is described in the “next entry”.
The TOC in the following description is configured on the assumption that the time codes in the entries are continuous. On any other assumption, however, the TOC will be configured otherwise than herein.
There is recorded in the area B in
FIGS. 1A and 1B
, the moving picture image information having a length of time of 1 hour, 2 minutes and 3 seconds and consisting of 4 frames. It is assumed here that the moving picture image information includes an MPEG2 Video signal and an MPEG2 Audio signal resulted from time-division multiplexing with a Program Stream of a so-called MPEG2 system, for example. However, the essentials of the video and audio signals will not vary even if any other time-division multiplexing method and video and audio coding methods are adopted for generation of the video and audio signals. The MPEG referred to herein stands for the Moving Picture Experts Group being the Image Coding group of the ISO/IEC JTC/SC29 (International Organization for Standardization/International Electrotechnical Commission, Joint Technical Committee 1/Sub Committee 29). The MPEG1 standard include ISO 11172, and the MPEG2 standard includes ISO 13818. In these international standards, ISO 11172-1 and ISO 13818-1 are included in the item of system multiplexing, ISO 11172-2 and ISO 13818-2 are included in the item of video coding, and ISO 11172-3 and ISO 13818-2 are included in the item of audio coding.
In
FIG. 1A
, the area C has nothing recorded therein.
The following information are recorded in the area A (TOC). In this condition, the TOC has one entry.
Entries=
1
Contents of entry
0
Start address=addr
0
End address=addr
1
Start time code=0:00:00:00 (as in
FIG. 1B
)
End time code=1:02:03:04 (as in
FIG. 1B
)
Next entry=None
Contents of entry
1
(same as above)
Null information
Currently, the area B in
FIGS. 1A and 1B
has recorded therein the MPEG stream between 0 hour, 0 minute, 0 second, and 0 frame (0:00:00:00) indicated with the start time code and 1 hour, 2 minute, 3 seconds and 4 frames (1:02:03:04) indicated with the end time code. Also, the area C has nothing recorded therein as shown in FIG.
1
A.
The editing procedure using a disc having the above-mentioned video and audio information recorded therein will be described herebelow:
As one example of the editing procedure, a partial deletion of the data recorded in the disc as mentioned above will be explained with reference to
FIGS. 3A and 3B
As shown, a part between 0 hour, 0 minute, 0 second and 0 frame (0:00:00:00) and 0 hour, 20 minutes, 30 seconds and 4 frames (0:20:30:04), and a part between 0 hour, 40 minutes, 50 seconds and 6 frames (0:40:50:06) and 1 hour, 2 minutes, 3 seconds and 4 frames (1:02:03:04), are to be left on the disc. That is, a part between 0 hour 20 minutes, 30 seconds and 5 frames (0:20:30:05) and 0 hour, 40 minutes, 50 seconds and 5 frames (0:40:50:05), is to be deleted.
An edition of a data, say, a partial deletion of the data, as in the above will lead to two different results, depending upon how the stream is arranged after the data edition.
That is to say, the partial data deletion can be done with two techniques. The data is forwarded or not for the deleted part at the time of editing. In other words, skip has to be done or not over the deleted part at the time of reproducing the edited data. More particularly, after the data is partially deleted, a subsequent data is forwarded for a blank part resulted from the deletion (which will be called “first editing method” hereafter), and the stream position is reserved just with the unnecessary part deleted (which will be called “second editing method” hereafter). Thus, the edition will lead to the two different results of edition depending upon the adopted editing method (arrangement of the stream). However, the edit points in the results are little different from each other. This is because both the techniques of edition have some problems which will not be further described herein.
First, the result of the first editing method (the subsequent data forwarded for the blank part after the deletion of an unnecessary part) adopted as the editing procedure (arrangement of data streams) will be described in detail below:
FIGS. 3A and 3B
schematically show the result of edition from the first editing method.
FIG. 3A
shows three recording areas A, B and C on the disc. The recording areas A, B and C are contiguous like a line extending from the innermost perimeter of the disc to the outermost perimeter.
FIG. 3B
shows only one of the three areas, say, the area B in which the data is forwarded for the deleted unnecessary part.
In the example shown in
FIGS. 3A and 3B
, a part between 0 hour, 20 minutes, 30 seconds and 5 frames (0:20:30:05) being a frame next to 0 hour, 20 minute, 30 second and 4 frames (0:20:30:04) in
FIG. 2 and
0 hour, 40 minutes, 50 seconds and 5 frames (0:40:50:05) being a frame preceding 0 hour, 40 minutes, 50 seconds and 6 frames (0:40:50:06) in
FIG. 2
is deleted and the subsequent data is forward to the trailing end of the former data.
By forwarding the subsequent data for the deleted unnecessary part as in the example shown in
FIGS. 3A and 3B
, an area corresponding to the deleted part will be a new area in which data can be recorded , thus, the area C will be expanded correspondingly.
Through the edition as in
FIGS. 3A and 3B
is done, the following information will be recorded in the TOC. In this condition, the TOC includes two entries:
Entries=
2
Contents of en

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