Topic 'Re: the report defines an HD stream as 2 Mbps' in forum '' - dslreports.com http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508639 en Tue, 21 May 2013 21:10:44 EDT Tue, 21 May 2013 21:10:44 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27522735 said by fifty nine:

said by FBGuy:

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/
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Well, does your car at least turn into something else? Sometimes I turn it into a trashcan. Hmm...]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27522735 Thu, 13 Sep 2012 23:39:44 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27512499 said by Paulg:

Uh, what? I was unaware that any U.S. state was part of the Canadian "northern wilderness."

What part of correspond was too complicated?]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27512499 Tue, 11 Sep 2012 09:59:09 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27512108 said by Bob:

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.
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Michael Graves
Houston TX
»www.mgraves.org]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27512108 Tue, 11 Sep 2012 06:56:00 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27511004 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27511004 Mon, 10 Sep 2012 19:34:05 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510917 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510917 Mon, 10 Sep 2012 19:02:57 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510707 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510707 Mon, 10 Sep 2012 18:01:45 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510469
Put your Bluray player into info/diag mode, play a bluray movie and watch the data rate. A simple movie like Blazing Saddles is encoded VC-1 (very compact, similar to h.264/Mpeg4-part10). It shows sustained data rate of 20 to 24Mbps, with peaks to 40.

Imagine a movie containing scenes with high entropy (some of the exciting moments in Event Horizon?).

There's no magic. Lossy encoding throws away information. If you want high quality, you pay the price: high data rate. Cable&Sat providers transmit low BW because it saves them money on distribution and it relegates any pirated copies to inferior quality.

Now imagine the future: 48 frame per second content. 4K video. Data rates SHOULD go up to maintain fidelity. Only last-mile systems with very small node sizes (and lots of aggregate capacity), such as XGPON or point-to-point FTTH will be able to service lots of viewers streaming OTT video at very high data rates. Coaxial-based providers (cable companies) are just stalling, trying to delay rebuilding their OSP. (Deferring an expense puts more money in their executive bonus checks.) ]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510469 Mon, 10 Sep 2012 16:55:59 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510177 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27510177 Mon, 10 Sep 2012 15:49:06 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27509557 said by Paulg:

Uh, what? I was unaware that any U.S. state was part of the Canadian "northern wilderness."

Alaska?]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27509557 Mon, 10 Sep 2012 13:20:52 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27509526 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27509526 Mon, 10 Sep 2012 13:14:36 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508986 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508986 Mon, 10 Sep 2012 10:53:20 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508725
Hardly shocking eh. Why would there be a lot of broadband in places where there is a lot of no one around.]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508725 Mon, 10 Sep 2012 09:26:47 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508697 What connection speed is required to be able to receive any true HD stream?]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508697 Mon, 10 Sep 2012 09:15:21 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508692 said by FBGuy:

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.]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508692 Mon, 10 Sep 2012 09:12:03 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508687 said by Bob:

8 Mbps

Only Vudu actually uses bitrates that high and you'll pay extra for that too.]]> http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508687 Mon, 10 Sep 2012 09:09:10 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508681 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508681 Mon, 10 Sep 2012 09:08:20 EDT Re: the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508668 http://www.dslreports.com/forum/Re-the-report-defines-an-HD-stream-as-2-Mbps-27508668 Mon, 10 Sep 2012 09:01:10 EDT the report defines an HD stream as 2 Mbps http://www.dslreports.com/forum/the-report-defines-an-HD-stream-as-2-Mbps-27508639 real HD stream would use.]]> http://www.dslreports.com/forum/the-report-defines-an-HD-stream-as-2-Mbps-27508639 Mon, 10 Sep 2012 08:48:10 EDT