Clock recovery for video encoding/transcoding applications
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United States of America Patent
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Sep 19, 2017
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N/A
app pub date -
Apr 27, 2015
filing date -
Dec 16, 2014
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Abstract
Approaches for clock synchronization in digital video environments. In an embodiment, an encoder/transcoder calculates a ratio between a system clock and a source clock. The source clock is used by a source device to encode or transcode digital video. The system clock is used by the encoder/transcoder. After the encoder/transcoder receives the digital video from the source device, the encoder/transcoder uses the calculated ratio to create a recovered clock. The recovered clock is locked to a frequency of the source clock but not to the phase of the source clock. The encoder/transcoder uses the recovered clock to encode or transfer the digital video received from the source device. The encoder/transcoder ensures that the frequency of the recovered clock does not change faster than a certain rate, e.g., 0.075 Hz/second.
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