 Video adapter circuit for detection of analog video scanning formats |
| OF THE INVENTION FIG. 1 illustrates a block schematic diagram of the flat panel display video ... |
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| Magnetic disc recording and/or reproducing apparatus |
| In an attempt to provide a direct visual display of the number of tracks recorded on a magnetic ... |
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| Recording and/or reproducing apparatus, particularly with means for searching for vacant tracks |
| An object of the present invention is to provide a recording and/or reproducing apparatus which ... |
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| Receiving apparatus including a display for displaying the amount of unrecorded memory |
| It is the first object of the present invention to provide a receiving apparatus which can solve ... |
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| 3D virtual reality multi-user interaction with superimposed positional information display for each user |
| It is therefore an object of the present invention to allow a user to easily recognize the position ... |
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| Video signal selecting device |
| It is therefore an object of the present invention is to provide a video signal selected device ... |
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| Method and apparatus for constructing, storing and displaying characters |
| This invention provides a computer system for creating graphic characters for display on a video ... |
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| Bi-directional bus system and transmitting, receiving, and communication methods for same |
| This invention has been made in view of actual circumstances as stated above, and its object is to ... |
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Reproducing method and apparatus
| Details |
Inventors: Matsumura, Yoshiaki; Okazaki, Toru; Ogawa, Kenji;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Nguyen; Huy
Assistant Examiner:
Attorney, Agent or Firm: Frommer Lawrence & Haug LLP, Frommer; William S., Polito; Bruno
The reverse direction reproduction of encoded data comprised of picture data compressed in accordance with the MPEG system is to be realized at a higher speed. To this end, plural frame memories are used for reverse direction reproduction. The respective pictures are sequentially decoded and the decoded pictures are sequentially held in the frame memories. If there is no vacant memory, the frame memories are sequentially overwritten beginning from the frame memory which stores the picture decoded first. If the decoding progresses up to the picture to be reproduced, and the decoding of the picture to be reproduced comes to a close, the decoding is transiently halted and the picture to be reproduced is read out from the frame memory and displayed. If the picture to be reproduced is displayed, the frame memory which has held the displayed picture is evacuated. The decoding is re-initiated for decoding the picture consecutive to the picture the data of which are as yet held in the frame memory. |
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DETAILED DESCRIPTION It is therefore an object of the present invention to provide a reproducing method and apparatus in which it is possible to realize high-speed reverse direction reproduction of the encoded data comprised of picture data compressed in accordance with e.
g.
, the MPEG system.
The reproducing apparatus according to the present invention is configured for reproducing compressed encoded data by exploiting correlation of picture data along the time axis direction over plural frames.
The reproducing apparatus includes decoding means for decoding the encoded data, a frame memory in which to store the picture data decoded by the decoding means, writing means operating so that, in reverse direction reproduction of the encoded data in a direction reversed from the time axis direction, the encoded data of the respective pictures are sequentially decoded, the decoded picture data are sequentially stored in the frame memory, and if there is no vacant frame memory, the frame memories are sequentially overwritten beginning from the frame memory which stores the picture data decoded first, and output means for reading picture data to be reproduced on completion of decoding thereof to output the picture data to be reproduced.
The reproducing apparatus also includes control means for performing control so that, on outputting the picture data to be reproduced, the frame memory which has stored the data of the outputted picture is evacuated for writing therein the picture data now to be decoded.
With the reproducing apparatus according to the present invention, the processing of repeatedly decoding the same frame at the time of reverse direction reproduction can be eliminated.
That is, with the reproducing apparatus of the present invention, reverse direction reproduction can be realized with a smaller number of times of the decoding operations.
In the reproducing method of the present invention, if the encoded data is to be reproduced in a direction reversed from the time axis direction, the encoded data of the respective pictures are sequentially decoded, and the decoded picture data are sequentially saved in the frame memory
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TV Signal 
