Synchronization method of image decoder
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United States of America Patent
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Nov 26, 2002
Grant Date -
N/A
app pub date -
Oct 13, 1999
filing date -
Feb 20, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The image decoding apparatus includes first clock reproducing means 20 for reproducing the first clock signal 21 from a time stamp signal 19 extracted from a digital transport stream 5, decoding means 8 for decoding a digital video stream 7 and outputting the first digital video signal 9 synchronizing with the first clock signal 21 and having the first frame frequency, graphic generating means 10, overlaying means 12 for overlaying the first digital video signal 9 and the graphic signal 11 and outputting the first overlaid digital video signal 15 synchronizing with the first clock signal 21, and digital-to-analog converting means 16 for converting the first overlaid digital video signal 15 into an analog signal 17, and an image without any missing frames or display disturbances can be provided even when the digital video signal and the graphic signal are displayed being overlaid.
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