| 摘要 |
The invention relates to an MPEG video recording medium and a reproduction apparatus for the reconstruction of missing data sequences of a video data stream. Scratches and other defects of the recording medium cause interruptions or disturbances in the data stream read from the recording medium, which can be corrected only to a limited extent by conventional error correction methods, such as the Reed-Solomon Code, for example. Therefore, an MPEG video recording medium is provided on which, with respect to an original I frame (I1), at least one copy or a similar I frame (I1*) is recorded on the recording medium for the reconstruction of missing or erroneous data sequences of a video data stream. The replacement I frames (I1*, ...) are arranged in the outer area, intermittently or within a predetermined area in the program area on the recording medium and do not influence the reproduction of the recording medium on conventional reproduction apparatuses. In a reproduction apparatus for the reconstruction of missing or erroneous data sequences of a video data stream from an MPEG video recording medium, provision is made of error detection means for determining the sector address of a missing or erroneous I frame (I1, ...), which are used to start a search for a copy or a similar I frame (I1*, ...) on the recording medium, and provision is made of control means by which a missing or erroneous I frame (I1) in the original data stream is replaced by the copy or the similar I frame (I1*) for the reconstruction of missing or erroneous data sequences of the video data stream and is reproduced by a video decoder.
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