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fifty nine

join:2002-09-25
Sussex, NJ
kudos:2
reply to ArrayList

Re: the report defines an HD stream as 2 Mbps

said by ArrayList:

I'd be curious to see what a real HD stream would use.

It depends on the codec and compression.

19MBps is the maximum that broadcast HDTV can use and they use a less efficient codec (MPEG2). Blu-ray Disc (BD) can use more than that. Streaming tends to use less because of home internet connections typically being lower bandwidth. It is a chicken and egg scenario.


ArrayList
netbus developer
Premium
join:2005-03-19
Evanston, IL

I don't consider something with compression as HD



gjrhine

join:2001-12-12
Pawleys Island, SC

Even all HD is compressed.


Bob4
Account deleted

join:2012-07-22
New Jersey

Uncompressed would be 1200 Mbps (1.2 Gbps). So all HD is compressed.



mgraves1
Premium
join:2004-04-05
Houston, TX

said by Bob4:

Uncompressed would be 1200 Mbps (1.2 Gbps). So all HD is compressed.

Actually, SMPTE 292M specifies 1.485 Gbps as the nominal data rate for uncompressed HD.

It gets confusing in transmission because the channel usually receives several streams multiplexed together, often at least 1 HD and 1-2 SD streams, into that bandwidth.

Uncompressed HD video is very pretty, but not often seen in the wild.
--
Michael Graves
Houston TX
»www.mgraves.org


Anonymous_
Anonymous
Premium
join:2004-06-21
127.0.0.1
kudos:2
Reviews:
·Time Warner Cable
reply to fifty nine

said by fifty nine:

said by ArrayList:

I'd be curious to see what a real HD stream would use.

It depends on the codec and compression.

19MBps is the maximum that broadcast HDTV can use and they use a less efficient codec (MPEG2). Blu-ray Disc (BD) can use more than that. Streaming tends to use less because of home internet connections typically being lower bandwidth. It is a chicken and egg scenario.

I am sure he wanted to know the uncompressed rate
10-bit Uncompressed HD - 1080i at 59.94 fps 155 MB/s
10-bit Uncompressed HD - 1080p at 23.98 fps 125 MB/s
source
»www.matrox.com/video/en/support/···storage/
--
Well, does your car at least turn into something else? Sometimes I turn it into a trashcan. Hmm...