Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-12-28
2002-05-21
Nguyen, Huy (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06393201
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a reproducing apparatus of information recording media, in particular, optical information recording medium such as an optical disc (i.e., a so-called “Digital Video Disc”, etc., into which digital video/audio information can be recorded, and also to a recording/reproducing apparatus of information recording media, including such optical information recording media such as a DVD-RAM (i.e., a so called Digital Video Disc-Random Access Memory), etc.
2. Description of Prior Art
In Japanese Patent Laying-Open No. Hei 9-219086 (1997), there is disclosed or described an example of a conventional reproducing apparatus of an optical disc.
The optical disc reproducing apparatus of the conventional art has a function of detecting an identifier which is an inherent information for each of the optical discs and obtainable from the data of the recorded information thereof so as to identify it, and a function, a so-called “last memory” function for memorizing position information of the optical disc, whereby the video/audio information is recorded into a last memory together with it, when a last memory instruction key is pushed down.
In such the reproducing apparatus of the optical disc, after being mounted or set with an optical disc therein, the identifier of the optical disc is detected and decided whether to be coincident with that which is memorized into the last memory or not. In a case where it is detected that they are coincident to each other, then the reproduction is started from a continuous reproducing position upon an instruction for reproduction generated from the last memory on/off operation key, while the reproduction is started from an original starting position or beginning if there is no such the starting instruction for the reproduction from the last memory on/off operation key. Further, if it is impossible to detect the fact that they are coincident to each other, the reproduction is started from the original starting position (i.e., from the beinning) with regardless of the operation on the last-memory on/off operation key.
However, in such the conventional art, the position information of the optical disc recording the video/audio information therein, at the time when the last memory instruction key is pushed down, is memorized into the last memory together with the identifier information, upon the operation of the last memory instruction key, therefore there is not guarantee that the identifier information and the position information of the disc at which the reproduction is made are certainly memorized into the last memory in any occasion.
For instance, if the power supply is abruptly turned OFF (i.e., interrupted) or is cut off (i.e., stopped) under bad condition of electric power supply source, further, if a power bottom is erroneously turned OFF because of forgetting the operation of the above last memory instruction key, the identifier information and the position information of the disc at which the reproduction is made are lost. Therefore, there is a problem that the continuous reproduction cannot be obtained even if the power source including power supply is turned ON again.
SUMMARY OF THE INVENTION
A first object of the present invention is, for dissolving the above-mentioned problem, to provide a reproducing apparatus of information recording media, in particular, an optical information recording medium, and a method thereof, whereby the continuous reproduction can be immediately done when the power source including power supply is turned ON again, even in the case where the power supply was abruptly turned OFF or is cut off under such the bad condition of the electric power supply source, and further in the case where the power button is erroneously turned OFF without operation of the above last memory instruction key.
A second object of the present invention is to provide a reproducing apparatus of information recording media, in particular, an optical information recording medium, whereby the reproduction can be done continuously from the reproduction interruption position, or from the beginning of a title, a chapter or a disc, at the user's selection when the power source including power supply is turned ON again, even in the case where the power supply is abruptly turned OFF or is cut off under such the bad condition of the electric power supply source, and further in the case where the power button is erroneously turned OFF without the operation of the above last memory instruction key.
A third object of the present invention is to provide a reproducing apparatus of information recording media, in particular, an optical information recording medium, whereby the continuous reproduction can be done with maintaining the same condition as before when the power source including power supply is turned ON again, even in the case where the power supply is abruptly turned OFF or is cut off under such the bad condition of the electric power supply source, and further in the case where the power button is erroneously turned OFF without operation of the above last memory instruction key.
A fourth object of the present invention is to provide a recording/reproducing apparatus of information recording media, in particular, an optical information recording medium, whereby continuous recording of input data can be done immediately when the power source including power supply is turned ON again, even in the case where the power supply is abruptly turned OFF or is cut off under such the bad condition of the electric power supply source.
A fifth object of the present invention is to provide a recording/reproducing apparatus of information recording media, in particular, an optical information recording medium, whereby continuous recording of input data can be done immediately with maintaining the same condition as before when the power source including power supply is turned ON again, even in the case where the power supply is abruptly turned OFF or is cut off under such the bad condition of the electric power supply source.
According to the present invention, for achieving the first object mentioned above, there is provided a reproducing apparatus of an information recording medium, comprising:
a drive for reading out information recorded onto the information recording medium;
a drive controller portion for controlling said drive so as to extract video/audio data from the recorded information by reproducing thereof, and having a function of identifying said information recording medium which is mounted onto said drive by detecting an identifier information from data in the recorded information;
video/audio output portion for outputting video/audio;
a work memory for memorizing the identifier information being identified in said drive controller portion, the video/audio data being extracted in said drive controller portion, and information indicative of reproducing position;
a decoder portion for reading out the video/audio data memorized in said work memory and for converting the read-out video/audio data into desired video/audio data to be outputted to said video/audio output portion;
an interruption instruction means for outputting an interruption instruction at a desired time period or frequency;
a non-volatile memory; and
a controller portion for controlling the identifier information and the information indicative of the reproducing position which are memorized in said work memory so as to be read out and to be stored into said non-volatile memory upon basis of the interruption instruction outputted at the desired time period or frequency from said interruption instruction means.
According to the present invention, for achieving the second object mentioned above, there is provided a reproducing apparatus of an information recording medium, comprising:
a drive for reading out information recorded onto the information recording medium;
a drive controller portion for controlling said drive so as to extract video/audio data from the recorded information by reproducing thereof,
Ito Tamotsu
Sakuramoto Yukari
Antonelli Terry Stout & Kraus LLP
Hitachi , Ltd.
Nguyen Huy
LandOfFree
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