Thread: HD or BluRay?
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Randy Yates Randy Yates is offline
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Default HD or BluRay?

"Arny Krueger" writes:

"Randy Yates" wrote in message


"Mr.T" MrT@home writes: [...]


The physical layer of an OTA HD signal supports up to
21 Mb/s. That translates to about 20 GB in two hours.


My MPEG captures of very detailed OTA HD TV programs (a sports event, a live
awards show) run about 4 GB every 40 minutes. That is 12 GB every 2
hours.


There are numerous resolution/frame rate/interlacing modes for the main
channel. It could be that these main source channels are not yet pushing
the maximum.

It could also be that your card is not storing the raw, unencoded MPEG-2
video data but is either a) transcoding the signal or b) completely
decoding and re-encoding the signal in MPEG4 or H.264, both of which are
better encoders (smaller bit rate for the same signal quality) than
MPEG-2.

In any case, 20 GB/two hours should handle ANY main channel mode for
OTA HD since that is the maximum transport channel rate (before channel
coding).
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