Frage von Blackeagle123:
Hello,
an event should be recorded and synonymous live on a screen are projected. Since the cameras anamorphic transfer and we want to work with 16:9, this means that the PAL-signal (768 * 576) in the Width to 1024 pixels to be dragged! We transmit the signal with FBAS. We work with cameras and SonyS270 in the truss hangs a Z7.
Means on the canvas a foreseeable loss of quality?
Many greetings,
Constantin
Antwort von robbie:
the resolution remains the same, if you are synonymous anamorph record. pal has always 720x576. it merely changes the pixel aspect ratio.
1024x576 is just an ugly art, standbilder to 16:9 to get if you do not know how to par altered.
The CVBS signal is "same" as in 4:3, you have the beamer just switch to 16:9.
Antwort von Blackeagle123:
Hello,
a DVD has the Resolutionvon 720 *..., PAL has 768 *...!
The rest is clear, but it is precisely because the aspect ratio changes, so the individual pixels are stretched / interpolated. And in the Width of 768 to 1024 pixels. The question is whether the live-in area on the big screen makes bemerktbar? (Apart of the change in the light of the beamer, synonymous in the 16:9 mode clearly enough!)
Many greetings,
Constantin
Antwort von david2:
Yes, the horizontal sharpness is already higher than 4:3 for 16:9. Because you can do nothing and that is synonymous not a problem (is not).
Antwort von Blackeagle123:
Okay! Thank you ...
Antwort von PowerMac:
(...) Has a DVD Resolutionvon 720 *..., PAL has 768 *...! (...) Wrong!
Antwort von Blackeagle123:
taking into account the aspect ratio, so we can perhaps of PAL 4:3 with the Resolution768 * 576 (square pixels) in 16:9 and speak of 1024 square pixels. In the transfer will still not be sent to 1024 pixels and is not synonymous of the camera (either letterboxed, s. Sat1 / Pro7 or "shrink to Picture" s. ZDF). The DVD is 720 pixels down is expected, what the TVdann by a tearing of the pixel increases.
So what is wrong because of a PAL Resolutionvon 768 * 576 to speak?
Many greetings,
Constantin
Antwort von Blackeagle123:
Okay, after I've just read, we should speak of analog PAL, because in the digital PAL signal is a Resolutionvon 720 columns!
Richtig so?
Antwort von PowerMac:
There is no difference between DVD and TV regarding the resolution. Who have you because the flea in his ear set?
Antwort von Blackeagle123:
I believe the resolution is 4:3 One device 768 * 576, but the DVD with only 720 columns and stored the TV tugs / interpolate the picture to the pixel number of 768 columns.
Likewise, digital PAL 720 pixels transmitted in analog Pal 768! Be found on Wikipedia ...
The pixel ratio is a case in which only 1 and the other dragged larger (depending on the output format), because After Effects says:
for 4:3 = 1.07
and at 16:9 = 1.42
(You can, of course, synonymous with Square Pixels work)
Liege I wrong somewhere?
Many greetings,
Constantin
Antwort von PowerMac:
Tube Television firstly have no resolution, you could pinpoint. Digital PAL has 720x576. However, the slightly distorted, the pixels are slightly squashed horizontally. On computers and on digital displays will be rectified 768x576. Be transferred but only 720x576 pixels. On DVD, video cassettes, for stations ... You said, only on DVD, it would be 720x576. Digital is
everywhere but 720x576. Analogue PAL is dead
Antwort von Martin Dienert:
Analogue PAL is dead Objection!
The signal that my DVB-satellite or DVD player to my left and CRT TV "migrates" is probably "analog PAL. And I do not want this because it is dead then I can see nothing more. ;-)
Martin
Antwort von Jogi:
Analogue PAL is dead
Objection!
The signal that my DVB-satellite or DVD player to my left and CRT TV "migrates" is probably "analog PAL. And I do not want this because it is dead then I can see nothing more. ;-)
Martin True, everything that leaves the Scart output is analogous.
The 768 lines in analog PAL but had to compensate for overscan thought! Or? What ultimately watch on the tube, were 720 lines! (Believe me, at least)
Antwort von megalutzi:
True, everything that leaves the Scart output is analogous.
The 768 lines in analog PAL but had to compensate for overscan thought! Or? What ultimately watch on the tube, were 720 lines! (Believe me, at least) Oh woe!
PAL has 625 lines, not more. The number 768 or 720 is the horizontal scanning of the analog Resolutionbei line.
Antwort von Blackeagle123:
There are synonymous analog and digital SAT-Receiver. Then convert the Receiver probably what the signal arrives to the Resolutionvon (virtually) 768 COLUMNS (!)!?
It was through the cable "migrates" is seems to be quite similar and with the Resolutionvon 768 pixels and no more 720 pixel, because the picture will be pulled?
Lg!
Antwort von Martin Dienert:
There are synonymous analog and digital SAT-Receiver. It is in this case is not important. We consider only the output of the device.
Then convert the Receiver probably what the signal arrives to the Resolutionvon (virtually) 768 COLUMNS (!)!?
It was through the cable "migrates" is seems to be quite similar and with the Resolutionvon 768 pixels and no more 720 pixel, because the picture will be pulled? Remember times when the concept of analog technology pixels. A television picture is so well known, of an electron beam on the screen "subscribed" (black / white television). This beam is from the picture signal ([f] BAS) in the intensity and thus influences the brightness of the body concerned s.der changed. The higher the bandwidth of the video is the more changes in the brightness per unit of time can be "subscribed" to be. Because television is not to be unnecessarily expensive bandwidth is often lower than for a perfect TV picture would be needed. This means that the high frequencies (rapid alternation between bright and dark) truncated or steamed. The Picture is (horizontally) blur.
The playback device then generates from the 720 horizontal pixels of the digital signal an analog signal (composite) of the Television, depending on the quality more or less can be sharp. Had a digital video with alternating white and black, one pixel wide, vertical stripes have the amplitude of the analog image signal during the time of a horizontal beam pass (I think 64 microseconds) 360 times of maximum and back to zero change. In the Community Television would be safe only gray "Gemansche" to see.
I hope my explanations are leienhaften to understand and not with too many mistakes peppered.
Martin
Antwort von WoWu:
Oha, because we are deeply rooted in the Stone Age television arrived and the whole beautiful reflection on how broken our old analog TV system well may be, are all wrong.
364 pixels are just times that our "good old" tube gives us.
Nix da 720th of 767 or
That would be about that. 7.4 MHz have been necessary.
(52¼s / 767 = 67.7797 ns and the bandwidth of at ½ x duration of an illuminated pixel = 7.375 MHz)
After the war, there was for us of the CCIR, but only 5 MHz. Why? As an RCA technician RDKell, vorgerechnet had that of the 575 lines anyway, only 65% get dissolved. (Kellfaktor) The 4:3 aspect ratio factor, it was therefore necessary synonymous nit 767 pixels horizontally broadcast only synonymous but only 65% of them remained and thus of the required 7.4 MHz only 65%, ie 4.81 MHz.
We therefore once of the 5 Mhz back to the possible resolution, we have it horizontally with (5 MHz x 2 x 52 microseconds) = 520 pixels to be done.
Unfortunately, there is aggravated by the fact that due to the color processing, the viewing distance and synonymous with the multi-wegempfang the range of television broadcasting in Germany was next restricted.
The usual PAL demodulators in the analog television sets limited the bandwidth of the video signal to 3.5 MHz.
Should we again expect?
3.5 MHz x 2 x 52 ms = 364 points!
Antwort von Jan:
PAL is but of Mr Bruch (Telefunken) or standardized? Everywhere it is of 625 lines, of which 576 visible lines spoken?
Or do you mean the actual Resolutionvon PAL?
Yes, a Y & C signal, here synonymous video known as S, is about 430 lines and 4.4 MHz, which should & should be the case on PAL is yes ....
VG
Jan
Antwort von Blackeagle123:
Now, I must honestly admit that I no longer understand why the signal, which goes to the TV is digital rather than analog and the television signal in the CVBS signal. Furthermore, I now no longer what PAL is and what has standardized resolutions. What resolution is now transferred as a composite cable, a Scart cable and satellite, or digital antenna?
Please clarify for me so I can understand why a DVD in the Resolutionvon 720 * 576 is stored and PAL square pixels with 768 * 576, if for only 68% are presented? Yes, because I'm saving space on the DVD ;-)
Look forward to the explanations.
Many greetings,
Constantin
Antwort von WoWu:
I stated that you liked when you get out there, but this is a somewhat longer history and maybe not so interesting for everyone.
But now we're looking at times why I am so vehemently opposed it, that similar problems and diversification synonymous in HD by all sorts of companies are made, even though HD once clear of SMPTE and has been defined clearly, including the precise image and Pixelausformungen.
And yet there are companies that their proprietary crap as HD and to sell s.keine standards, only to find each other more, supposedly improved equipment in the market can bring new money and thus earn.
With the success that the Consument in a few years in its HD archive with more significantly different pixels, timing, formats and samples has to struggle than it is now with the "old" TV standard.
In the professional field, the SMPTE already pulled the emergency brake and a "Recommended Practice" published by the manufacturer of professional equipment quasi committed that all the AVC decoder area shipped and behave like a compatibility thereby forcibly introduced.
So something is missing in the consumer sector still synonymous.
But the best is still filter information and if the customer crap on the shelves simply leave them as an HDTV to be sold.
Antwort von Blackeagle123:
Well, since I'm so smart now as before ... I would like to know how it is!
Actually I go to the following questions:
- What resolution is via satellite and via cable (analog & digital) transmitted?
- What resolution TFT/LCD- bodies and Plasma Television represent?
- What resolution is the Receiver or DVD player in the transfer Television? (In other words, changes Receiver / DVD player, the resolution of the TV or what I expect ...!?)
- What exactly is the change of the pixel aspect ratio? Only one way to save on memory?
Thank you in advance ever! ;-)
Many greetings,
Constantin
Antwort von Pianist:
Constantin, your questions can be a flat rate not answer because there are too many different ways. The broadcasters are indeed synonymous to this problem that they would soon be several emissions must run parallel to both the PAL as synonymous, the HDTV receiver to provide correct. These are technically just two completely different worlds. Of course, it is better to produce high resolution and in addition to the high exposure the picture to PAL size smaller than the other way around the PAL to HDTV Picture to enlarge.
Matthias
Antwort von Blackeagle123:
Hey, it's me just about PAL technology without HD Television and HD-broadcast! Did I forget to mention, but was vll in the course of the conversation clearly:)
Lg!
Antwort von Pianist:
Hey, it's me just about PAL technology without HD Television and HD-broadcast! Well everything has PAL resolution, what else?
Matthias
