Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1994-07-20
2001-06-19
Tran, Thai (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06249641
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a recording medium, particularly to the type in which managing data for managing data recorded in a recording area are recorded, and a recording or reproducing apparatus and method for such a recording medium.
2. Description of the Related Art
A recording apparatus, a reproducing apparatus and a recording medium such as a magneto-optical disc with which musical pieces and general data can be recorded and reproduced are known. Particularly, those magneto-optical discs which enable a user to not only reproduce information therefrom, but also record sounds such as music, etc. thereon have been recently made public.
A recording and/or reproducing apparatus using such a magneto-optical disc has been generally used to record/reproduce audio signals of music, etc., and this type of recording and/or reproducing apparatus is expected to enable an user to record/reproduce video (image) data in synchronism with sounds such as music, etc.
If video data are also considered to be recorded and/or reproduced together with audio data using a recording and/or reproducing apparatus which is originally developed for recording and reproduction of sounds (audio data), there would occur a problem that it is difficult to keep compatibility with a recording medium on which only audio data are recorded. That is, not only a system which is capable of recording and reproducing both of pictures (images) and music is merely provided, but also it is required to keep such compatibility that, for a recording medium on which video data are newly recorded, only audio data are recordable/reproducible using a recording and/or reproducing apparatus for ordinary magneto-optical discs to enjoy music, etc. while both of audio data and video data can be simultaneously reproduced using a recording and/or reproducing apparatus having a video input and output function to enjoy both of pictures and music like a Karaoke with pictures or a video equipment.
Further, in this type of recording and/or reproducing apparatus, there is a case where no reproduction can be performed by any one other than special persons, for example, when high secrecy is required for recorded data. In some cases, it is required that prescribed video or audio data can be reproduced by only those persons who know identification numbers for these data.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a recording medium which resolves the above-mentioned problem.
It is another object of the present invention to provide a disc-shaped recording medium which resolves the above-mentioned problem.
It is a further object of the present invention to provide a recording and/or reproducing apparatus of a recording medium which resolves the above-mentioned problem.
It is another object of the present invention to provide a recording and/or reproducing apparatus of a disc-shaped recording medium which resolves the above-mentioned problem.
It is still another object of the present invention to provide a reproducing apparatus of a disc-shaped recording medium which resolves the above-mentioned problem.
It is yet another object of the present invention to provide a recording or reproducing method of a disc-shaped recording medium which resolves the above-mentioned problem.
According to the present invention, there is provided a recording medium including a recording area, a first managing data area and a second managing area. In the recording area are recorded only audio data, or an intermixture of audio data and video data. In the first managing area are recorded first managing data for controlling a recording or reproducing operation of audio data for the recording area when only the audio data are recorded in or reproduced from the recording area. In the second managing data area are recorded second managing data for controlling a recording or reproducing operation of the audio data for the recording area when both of audio data and video data are recorded in or reproduced from the recording area.
According to the present invention the recording area may be recorded only compressed audio data, or intermixture of compressed audio data and compressed video data in a discrete or continuous form. The first managing data control a recording or reproducing operation of audio data for the recording area so that expanded audio data to be output when only the audio data are recorded in or reproduced from the recording area are output continuously. The second managing data control a recording or reproducing operation of the audio data for the recording area so that expanded audio data and expanded video data to be output when both of the audio data and the video data are recorded in or reproduced from the recording area are output continuously.
According to the present invention, there is further provided a recording and/or reproducing apparatus for such a recording medium. The apparatus includes first and second compandors, a storing unit, a data transforming unit, a head unit and a control unit. The first compandor compresses audio signals input thereto, and expands audio data read out from the recording medium. The second compandor compresses video signals input thereto, and expands video data read out from the recording medium. The storing unit temporarily stores therein both of the audio data and the video data which are output from the first and second compandors respectively, and temporarily stores therein both of the audio data and the video data which are read out from the recording medium. The data transforming unit transforms the audio data and the video data read out from the storing unit into recording data. The head unit records the recording data supplied from the transforming unit on the recording medium, and reads out data recorded on the recording medium. The control unit controls the recording or reproducing operation of data in or from the recording medium by the head unit on the basis of the first and second managing data read out by the head unit.
According to the present invention, the second managing data contains reproduction inhibiting data. The control unit is supplied with the first and second managing data which are read out by the head unit, and controls the recording or reproducing operation in or from the recording medium by the head unit on the basis of the first and second managing data. On the basis of the first managing data, the control unit carries out a reproducing operation for only a part of the recording area on the recording medium, on which the audio data are recorded. Further, on the basis of the second managing data and the reproduction inhibiting data of the second managing data, the control unit controls the head unit to partially read out the recording area on the recording medium.
According to another embodiment of the present invention, there is provided a reproducing apparatus of a disc-shaped recording medium. The disc-shaped recording medium includes a recording area in which only audio data or an intermixture of audio data and video data are recorded, a first managing data area stored with first managing data for controlling a recording or reproducing operation of the audio data for the recording area when only the audio data are recorded in or reproduced from the recording area, and a second managing data area stored with second managing data for controlling a recording or reproducing operation of both of the audio data and the video data for the recording area when both of the audio data and the video data are recorded in or reproduced from the recording area. The apparatus includes a head, a decoder, a memory, first and second compandors and a controller. The head reads out data which are recorded on the disc-shaped recording medium with being compressed. The decoder decodes the data read out by the head. The memory temporarily stores the video data and the video data which are output from the decoder. The first compandor expands the audio data output from the memory. The second compandor expands t
Smith Andrew V.
Sony Corporation
Tran Thai
LandOfFree
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