HD Net Awsome tonight!
- Thread starter Drone35
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Sure you can, its was just a rough estimate.
Using TMPGEnc 3.0 XPress using 3 minute video
3 min 720x480 at 4.38Mbps CBR = 100 Mbytes
3 min 100x100 at 4.38Mbps CBR = 100 Mbytes
4.38Mbps / 720x480 = 12 samples per pixel = 104,615,936 bytes mpeg-2
2.76Mbps / 480x480 = 12 samples per pixel = 67,121,152 bytes mpeg-2
0.12Mbps / 100x100 = 12 samples per pixel
67,121,152 bytes / 104,615,936 bytes = 64%
(480x480) / (720x480) = 66%
19.2 Mbps / 1920x1080 = 9.25 samples per pixel
14.3 Mbps / 1440x1080 = 9.25 samples per pixel
What's chroma format have to do with 1920x1080 transcoded to 1440x1080. Color space will effect each pixel or group the same.
Clock cycles per pixel. Sure look's linear and scalable to me. Cpu power to encode is another story.
That don't make sense. Think about it, who would down res a video and sample at the same or a higher rate taking up more bandwdth then the orginal video. By the way HDNet is 1920x1080i. If the average TS Rate is around 14.62 Mb/s it is 1920x1080i.
HDNET TS sample (Dead Like Me)
Resolution = 1920 x 1080i
FPS = 29.97
Apect Ratio = 16:9
Avg TS Rate = 14.62 Mb/s
Stream Type = MPEG-2 MP@HL VBR
Nom bitrate = 14200000 Bit/sec
Peak = 17555000 Bit/sec
Average = 16422000 Bit/sec
Chroma format = 4:2:0
American Movie Classics AMC 287 7 110° E*8
HD Net (8PSK) HDNET 9422 7 110° E*8
HD Net Movies (8PSK) HDNMV 9423 7 110° E*8
HDNET TS sample (Dead Like Me)
Resolution = 1920 x 1080i
FPS = 29.97
Apect Ratio = 16:9
Avg TS Rate = 14.62 Mb/s
Stream Type = MPEG-2 MP@HL VBR
Nom bitrate = 14200000 Bit/sec
Peak = 17555000 Bit/sec
Average = 16422000 Bit/sec
Chroma format = 4:2:0
http://img263.imageshack.us/my.php?image=hdnetil5.jpg
http://img248.imageshack.us/my.php?image=hdnet2iz9.jpg
VBR video sample rate will be all over the place but a terrestrial (over-the-air) transmission carries 19.39 megabits of data per second. Terrestrial (local) broadcasters use 8-VSB modulation that can transfer at a maximum rate of 19.39 Mbit/s, sufficient to carry several video and audio programs and metadata. Cable television plants generally operate at a higher signal-to-noise ratio and can use 16-VSB or 256-QAM to achieve a throughput of 38.78 Mbit/s, using the same 6 MHz channel.
HDNET TS sample (Dead Like Me)
Resolution = 1920 x 1080i
FPS = 29.97
Apect Ratio = 16:9
Avg TS Rate = 14.62 Mb/s
Stream Type = MPEG-2 MP@HL VBR
Nom bitrate = 14200000 Bit/sec
Peak = 17555000 Bit/sec
Average = 16422000 Bit/sec
Chroma format = 4:2:0
http://img263.imageshack.us/my.php?image=hdnetil5.jpg
http://img248.imageshack.us/my.php?image=hdnet2iz9.jpg
It isn't hard for any projection HD CRT gun to hit the full 1080 lines of vertical resolution.
Using 7" CRTs, most sets can hit around 1400 lines of horizontal resolution.
Using 9" CRTs, they can do around 1600-1650 lines.
Given that they have superb contrast, the resultant picture can be fabulous when properly aligned and calibrated. Many of the most demanding videophiles and certified calibration specialists use CRT-RP. The most important factor to many of these demanding viewers is contrast ratio. Having true, deep blacks set behind vibrant colors adds a 3-D aspect to a picture that is lacking on many digital sets.
It is only the very latest generation of DLP, LCOS, and plasma (not LCD yet) that are beginning to eclipse the overall picture quality of CRT-RP. New 1920x1080p sets with high contrast ratios are getting there.
When I was shopping a couple of years ago, I had the opportunity to compare many sets under many lighting conditions and full opportunity to adjust and tweek each one to "get them right." I couldn't find a single sub-$5000 set that could compete with a properly set up $1500 CRT-RP. That was before this last round of true 1080p and contrast improvements.
Unfortunately all most people have to go on are the grossly out of adjustment CRT-RPs sets that sit in the corners of HDTV showrooms. They have no idea how great a picture those sets can produce.
Using 7" CRTs, most sets can hit around 1400 lines of horizontal resolution.
Using 9" CRTs, they can do around 1600-1650 lines.
Given that they have superb contrast, the resultant picture can be fabulous when properly aligned and calibrated. Many of the most demanding videophiles and certified calibration specialists use CRT-RP. The most important factor to many of these demanding viewers is contrast ratio. Having true, deep blacks set behind vibrant colors adds a 3-D aspect to a picture that is lacking on many digital sets.
It is only the very latest generation of DLP, LCOS, and plasma (not LCD yet) that are beginning to eclipse the overall picture quality of CRT-RP. New 1920x1080p sets with high contrast ratios are getting there.
When I was shopping a couple of years ago, I had the opportunity to compare many sets under many lighting conditions and full opportunity to adjust and tweek each one to "get them right." I couldn't find a single sub-$5000 set that could compete with a properly set up $1500 CRT-RP. That was before this last round of true 1080p and contrast improvements.
Unfortunately all most people have to go on are the grossly out of adjustment CRT-RPs sets that sit in the corners of HDTV showrooms. They have no idea how great a picture those sets can produce.
If they are giving HDNET 14-15 Mb/s, then there is no reason for it to not be 1920x1080. That is more than sufficient to produce a good full rez picture ... although it can be even better with 16-17 Mb/s.
Your probably right. Would you believe 2 HD streams. Channel 287 HD preview is gone for now.
Last Update: 2:22 AM 1/18/07
??? American Movie Classics AMC 287 7 110° E*8
http://www.dishchannelchart.com/
If HDNET TS is 14.62Mbps and if HDNMV is about the same, theirs plenty of room for SD on that transponder 38Mbps bandwidth. With 3 HD channels the average of the 3 would be 12.6 Mbps.
???AMC 287 TP7 E*8 (not or is) the same as AMC 130 TP8 119° E*7???
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Yeah, right - look at her bottom lip. Sure, it is not 17 or 19 Mbps.
She is in motion walking and turning at a fast pace.
Avg TS Rate = 14.62 Mb/s
http://img263.imageshack.us/my.php?image=hdnetil5.jpg
http://img248.imageshack.us/my.php?image=hdnet2iz9.jpg
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Watching "Beetlejuice" on HDNET right now. Very soft. Not much better than DVD. In fact, as I watch more of it, it isn't as good as some DVDs. Could be a bad transfer.
I have a CRT and on the HD net test pattern I was able to read all but the last line. When I switch from my HD xbox to regular tv everything looks softer.
And yet with all these figures you still fail to realize that 26 Mbps that TSReader is reporting for NBC OTA is higher than the 19.39Mbps that ATSC is capable of or the 15.00Mbps the station is transmitting.
Yes, I have the same Dead Like Me Episode from HDNET as well - back before they reduced the bitrate and resolutoin of the channel. Try it now and see what you get. Posting figures from a cap done last July doesn't relate to today.
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