Video-data encoder and recording media wherein a video-data encode program is recorded
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United States of America Patent
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Apr 22, 2003
Grant Date -
May 24, 2001
app pub date -
Feb 23, 1998
filing date -
Feb 24, 1997
priority date (Note) -
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Abstract
To provide an apparatus for embedding watermark data according to the frequency-domain method efficiently into video data, a video-data encoder of the invention for performing encoding of an original video data into a compressed data stream having a multi-layer structure comprises; means (101) for transforming the original video data into a sequence of processing units of frequency domain data; means (103) for embedding predetermined watermark data into at least one unit of the sequence of processing units; and means (104 and 105) for generating the compressed data stream by processing the sequence of processing units. Therefore, the data transformation of the original video data into the frequency domain data for embedding the water-mark data can be performed efficiently without any additional process, by exploiting the data transformation for encoding the original video data into the compressed data stream.
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