Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1996-08-01
2001-03-06
Tran, Thai (Department: 2715)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06198877
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a technique for recording and reproducing compressed, time division multiplexed video and audio data on, for example, optical disc.
Disc-shaped recording media have come into widespread use for recording speech, video information and computer data. For example, the CD-ROM is used to record speech data, video data and other computer-usable data for use in a computer system. Files that are used for accessing the recording medium exhibit an advanced file classification storage function, such as the tree structure shown in
FIG. 27
for re-writing or erasing part of the stored data. A directory record which identifies the file position is placed at an arbitrary position on the recording medium, as shown in FIG.
28
and as a result, a file may be recorded in a split form.
In a CD or in a video CD, a table-of-contents (TOC) area is provided at the leading end, or beginning portion, of the recording medium, and file position information is collectively recorded therein. Since audio data and video data are recorded continuously, normal and special reproduction (e.g., reverse play, fast play, etc.) likewise may be continuous. Such CDs and video CDs do not require a computer to recover data thereon, and thus, a dedicated reproducing apparatus, less expensive than a computer has been put to practical utilization. Nevertheless, as the processing ability of computers advances and as the cost of computing decreases, thereby making it feasible for a computer to handle audio data and video data, the usefulness of reproducing data recorded on a digital recording medium, such as a CD or a video CD, has been increasing.
However, when conventional computer techniques are used to reproduce data from a digital recording medium, such as a CD or a video CD, a dedicated program or file system must be recorded for the computer to recognize in order to reproduce the CD or the video CD, and a separate file needed for the file system, or a special computer program, must be disposed outside the area in which the continuous audio and picture data are recorded. As a result, the optical pickup for the recording medium is moved frequently to the separate computer program or file system, thus generally lowering the access speed of the optical disc drive.
Conversely, with a dedicated reproducing apparatus (i.e., not a computer or PC) for a medium in which data is recorded continuously, such as a CD player or a video CD player, it is difficult to operate with a recording medium on which the data has been recorded in a computer-compatible file system and thus possibly has been recorded discontinuously.
OBJECTS OF THE INVENTION
It is, therefore, an object of the present invention to provide a technique which arrays the file on a recording medium that can be used with a computer system, the file being located between the TOC and the picture and audio data, thereby permitting high speed data readout from the computer system while facilitating continuous data readout using an inexpensive reproducing apparatus.
It is another object of the present invention to provide a technique in which part of the program data is self-complete and may be re-utilized.
It is yet another object of the present invention to provide a technique in which program-based addition, deletion and editing of plural programs may be made easily.
It is still another object of the present invention to provide a data recording technique and a recording medium in which plural programs may be manipulated easily and speedily even with an inexpensive reproducing apparatus.
SUMMARY OF THE INVENTION
In one aspect, the present invention provides a data recording technique wherein digital moving picture data and audio data in a bit stream are divided into packets, and a plurality of accessing start entry points are established for the time-division multiplexing of the bit stream. The resulting bit stream is split in a self-complete manner and digital moving pictures and speech data of a given program are recorded in each of plural areas of a recording medium.
The present invention provides a data recording medium on which is recorded the aforementioned multiplexed packets of digital moving picture data and audio data. As another aspect, the present invention provides a technique for reproducing the multiplexed packets of digital moving picture data and audio data as one program from each area of the data recording medium.
According to this invention, a file for a computer system is arranged between the TOC and video or audio data so that readout from the computer system may be made at a high speed and yet reproduction of the video or audio data may be readily attained by an inexpensive reproducing apparatus.
By designing part of the data in the program in self-complete form, re-utilization of various portions becomes feasible. In addition, program-based addition, deletion or editing of plural programs may be carried out easily. Plural programs may be handled easily and speedily even with inexpensive reproducing apparatus.
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Fujinami Yasushi
Kawamura Makoto
Frommer William S.
Frommer Lawrence & Haug LLP.
Smid Dennis M.
Sony Corporation
Tran Thai
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