#11 kommer det ikke an på hvor langt man regner med at side fra fjernsynet? Hvis man fx brugte et 32" som pc skærm, så ville det da være meget fedt med 1080p...
Ved 46", skal man sidde 2.5 meter eller tættere på skærmen for at få FULD valuta for pengene i 720p. 1.8 meter eller tættere på skærmen for at få fuld valuta for 1080p. Sidder man længere væk. Sidder man omkring 4.8 meter eller længere væk, kan man ikke skelne mellem 480p eller 1440p på en 46" skærm.
1080p på en 32", skal man sidde 1.2 meter eller tættere på skærmen for at få fuld valuta for opløsningen.
Sidder man tættere end 4 meter på en 100" skærm, får man fuld valuta for 1080p.
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Ikke desto mindre så ER der jo en forskel. Man kunne sikkert sige en del tilsvarende ting om dyre højtalere, men dem køber vi jo alligevel.
Og hvorvidt man kan se forskel afhænger altså også af skærmens øvrige kvalitet. Jeg giver ikke ret meget for diagrammer i den her sammenhæng. Og hvor har de dog gravet den 1440p opløsning frem?
Gi' dog pengene til Afrika... De har mere brug for dem.
This may come as a surprise to some of you, but 1920x1080 isn’t even necessary for many viewing environments. Over the past year, I’ve viewed a variety of 1080p displays (all showing 1080i content) at several distances. I have seen a noticeable improvement over 720p and 768p when viewing screens that measure 50 inches or larger, viewed at a maximum distance of 3x the screen height.
Sit farther away — or use a smaller screen — and you’re not likely to see the difference. In fact, you might think in some cases that 720p content looks better than compressed 1080i content, given the tendency for the latter to exhibit mosquito noise and interlaced motion artifacts.
At NAB 2006, I visited a representative of Pioneer in their Hilton suite to see the Pioneer PRO-FHD1 50-inch 1080p plasma TV in action. Next to it was a current Panasonic 50-inch 768p model. Both sets were fed the same 1080i content from an HD media server.
We sat about eight feet from both screens and watched a clip of a model slowly walking through a jungle-like setting, with close-ups of flowers, water, and the model’s face. The only time I could really see the increased resolution was in facial close-ups, where a little more skin texture became apparent. The Pioneer rep agreed with my assessment that the average viewer wouldn’t have spotted any difference at all between the two resolutions at that distance.
It appears that the strongest arguments for 1080p imaging apply to screen sizes measuring 60 inches or larger, which would include all home theater front projectors and many rear-projection TVs. Smaller HDTVs seem to work fine with 720p or 768p native resolution at typical viewing distances, no matter the resolution of the HD content.
Fra CarltonBale - hvor diagrammet er fra: There are a few obvious factors to being able to detect resolution differences: the resolution of the screen, the size of the screen, and the viewing distance. To be able to detect differences between resolutions, the screen must be large enough and you must sit close enough. So the question becomes "How do I know if need a higher resolution or not?". Here is your answer.
Based on the resolving ability of the human eye (with 20/20 vision it is possible to resolve 1/60th of a degree of an arc), it is possible to estimate when the differences between resolutions will become apparent. Using the Home Theater Calculator spreadsheet as a base, I created a chart showing, for any given screen size, how close you need to sit to be able to detect some or all of the benefits of a higher resolution screen.
What the chart shows is that, for a 50-inch screen, the benefits of 720p vs. 480p start to become apparent at viewing distances closer than 14.6 feet and become fully apparent at 9.8 feet. For the same screen size, the benefits of 1080p vs. 720p start to become apparent when closer than 9.8 feet and become full apparent at 6.5 feet. In my opinion, 6.5 feet is closer than most people will sit to their 50" plasma TV (even through the THX recommended viewing distance for a 50" screen is 5.6 ft). So, most consumers will not be able to see the full benefit of their 1080p TV.
However, front projectors and rear projection displays are a different story. They make it very easy to obtain large screen sizes. Plus, LCD and Plasma displays are constantly getting larger and less expensive. In my home, for example, I have a 123-inch screen and a projector with a 1280×720 resolution. For a 123-inch screen, the benefits of 720p vs. 480p starts to become apparent at viewing distances closer than 36 feet (14 feet behind my back wall) and become fully apparent at 24 feet (2 feet behind my back wall). For the same screen size, the benefits of 1080p vs. 720p start to become apparent when closer than 24 feet and become full apparent at 16 feet (just between the first and second row of seating in my theater). This means that people in the back row of my home theater would see some improvement if I purchased a 1080p projector and that people in the front row would notice a drastic improvement. (Note: the THX recommended max viewing distance for a 123" screen is 13.7 feet).
HDGuru - PDF Seating Distance Chart Below is the HD Guru HDTV Seating Distance Chart. It is based on human preception of detail. . [/b]Sitting at the optimum 720p distance using a 1080p display will yield no improvement in picture quality due to limits of our vision[/b]. In other words, if you plan to sit too far back from a given size 1080p, consider changing to a 720p HDTV or purchasing a larger 1080p HD set. Otherwise you will be wasting money by paying for higher resolution you can’t see.All screen sizes are in diagonal inches and all viewing distances are in inches. An example the 42" screen size:
To see all the high definition of a 42" 720p display requires a maximum viewing distance of 98.83 inches or 8.235 feet. If the 42" display is either 1080i or 1080p the maximum viewing distance for full visual resolution is 65.89 inches or 5.49 feet. If you view at a greater distance you will not achieve full visual resolution of all the detail.
Bottom line, you need to sit closer to a 1080 display than a you would with a 720p HDTV.
Wishlist hos Axelmusic: http://www.axelmusic.com/wishlist.php?uid=11140
Det er selvfølgelig logisk at forskellen bliver tydeligere jo mere skærmen fylder i synsfeltet, men ikke desto mindre ville det genere mig at bruge en formue på en BD afspiller, der kan sende et 1080p signal og en endnu større formue på et tv, der så ikke kan udnytte signalets potentiale.
I min stue sidder jeg vel ca. 3-3.5 meter fra mit tv, der er et 1366x768 LCD. Jeg kan se en kæmpe forskel på en almindelig DVD og et 720p signal. Ifølge diagrammet er det helt nede i bunden af skalaen, hvor der knap nok er nogen forskel. Ikke desto mindre ville jeg tage en "blindtest" any day.
Gi' dog pengene til Afrika... De har mere brug for dem.
"LCD-skærme kan forekomme mere detaljerede i butiksmiljøer på grund af billedernes lysstyrke og skarphed. Men reelt kan sådanne ekstreme lysstyrke- og skarphedsniveauer faktisk se grove og urealistiske ud i et hjemligt miljø. Selvom det er vigtigt for et tv-billede at være meget detaljeret, bør det altid se naturligt ud."
Hvorfor skulle det ikke kunne se naturligt ud i et hjemligt miljø? Det kommer vel i ligeså stor grad an på hvad der bliver vist derpå. Og "skarpheden" forværres vel ikke af den grund?
Nyeste anmeldelse: "The Thin Red Line" : http://bonysblog.wordpress.com/
#17 Nu kender jeg ikke størrelsen på dit TV. Du sidder ca 9.5-11.5 feet fra din skærm, så hvis du har et 37" - 42" skulle du også få en visuel fordel af 720p.
Har du et 37" og 720p er den maksimale anbefalede afstand fra skærmen omkring 7.5 feet, ca 2.3 meter fra skærmen. Sidder man tættere, får man endnu mere "bang for the buck", fordi øjet kan se endnu flere detaljer. Det er vor evne til at skelne detaljer, som er med til at bestemme fordelen mht. afstand fra skærmen.
Wishlist hos Axelmusic: http://www.axelmusic.com/wishlist.php?uid=11140
#11 Patriarch 17 år siden
Angående 1080p er det spild af penge på medmindre du er oppe i over 42 tommer.
#12 HonoDelLoce 17 år siden
Så selv en fremstilling af det i dag.. Og fandt nu kvaliteten ganske overbevisende til at jeg vil betale 12.000 for det :)
Med mindre der er nogen, der har nogle virkeligt gode idéer til et alternativ ?
#13 frygtl0s 17 år siden
#14 filmz-Bruce 17 år siden
Ved 46", skal man sidde 2.5 meter eller tættere på skærmen for at få FULD valuta for pengene i 720p. 1.8 meter eller tættere på skærmen for at få fuld valuta for 1080p. Sidder man længere væk. Sidder man omkring 4.8 meter eller længere væk, kan man ikke skelne mellem 480p eller 1440p på en 46" skærm.
1080p på en 32", skal man sidde 1.2 meter eller tættere på skærmen for at få fuld valuta for opløsningen.
Sidder man tættere end 4 meter på en 100" skærm, får man fuld valuta for 1080p.
#15 gi-jones 17 år siden
Og hvorvidt man kan se forskel afhænger altså også af skærmens øvrige kvalitet. Jeg giver ikke ret meget for diagrammer i den her sammenhæng. Og hvor har de dog gravet den 1440p opløsning frem?
#16 filmz-Bruce 17 år siden
Fra HDTV Expert:
SCREEN SIZE AND VIEWING DISTANCE
This may come as a surprise to some of you, but 1920x1080 isn’t even necessary for many viewing environments. Over the past year, I’ve viewed a variety of 1080p displays (all showing 1080i content) at several distances. I have seen a noticeable improvement over 720p and 768p when viewing screens that measure 50 inches or larger, viewed at a maximum distance of 3x the screen height.
Sit farther away — or use a smaller screen — and you’re not likely to see the difference. In fact, you might think in some cases that 720p content looks better than compressed 1080i content, given the tendency for the latter to exhibit mosquito noise and interlaced motion artifacts.
At NAB 2006, I visited a representative of Pioneer in their Hilton suite to see the Pioneer PRO-FHD1 50-inch 1080p plasma TV in action. Next to it was a current Panasonic 50-inch 768p model. Both sets were fed the same 1080i content from an HD media server.
We sat about eight feet from both screens and watched a clip of a model slowly walking through a jungle-like setting, with close-ups of flowers, water, and the model’s face. The only time I could really see the increased resolution was in facial close-ups, where a little more skin texture became apparent. The Pioneer rep agreed with my assessment that the average viewer wouldn’t have spotted any difference at all between the two resolutions at that distance.
It appears that the strongest arguments for 1080p imaging apply to screen sizes measuring 60 inches or larger, which would include all home theater front projectors and many rear-projection TVs. Smaller HDTVs seem to work fine with 720p or 768p native resolution at typical viewing distances, no matter the resolution of the HD content.
Fra CarltonBale - hvor diagrammet er fra:
There are a few obvious factors to being able to detect resolution differences: the resolution of the screen, the size of the screen, and the viewing distance. To be able to detect differences between resolutions, the screen must be large enough and you must sit close enough. So the question becomes "How do I know if need a higher resolution or not?". Here is your answer.
Based on the resolving ability of the human eye (with 20/20 vision it is possible to resolve 1/60th of a degree of an arc), it is possible to estimate when the differences between resolutions will become apparent. Using the Home Theater Calculator spreadsheet as a base, I created a chart showing, for any given screen size, how close you need to sit to be able to detect some or all of the benefits of a higher resolution screen.
What the chart shows is that, for a 50-inch screen, the benefits of 720p vs. 480p start to become apparent at viewing distances closer than 14.6 feet and become fully apparent at 9.8 feet. For the same screen size, the benefits of 1080p vs. 720p start to become apparent when closer than 9.8 feet and become full apparent at 6.5 feet. In my opinion, 6.5 feet is closer than most people will sit to their 50" plasma TV (even through the THX recommended viewing distance for a 50" screen is 5.6 ft). So, most consumers will not be able to see the full benefit of their 1080p TV.
However, front projectors and rear projection displays are a different story. They make it very easy to obtain large screen sizes. Plus, LCD and Plasma displays are constantly getting larger and less expensive. In my home, for example, I have a 123-inch screen and a projector with a 1280×720 resolution. For a 123-inch screen, the benefits of 720p vs. 480p starts to become apparent at viewing distances closer than 36 feet (14 feet behind my back wall) and become fully apparent at 24 feet (2 feet behind my back wall). For the same screen size, the benefits of 1080p vs. 720p start to become apparent when closer than 24 feet and become full apparent at 16 feet (just between the first and second row of seating in my theater). This means that people in the back row of my home theater would see some improvement if I purchased a 1080p projector and that people in the front row would notice a drastic improvement. (Note: the THX recommended max viewing distance for a 123" screen is 13.7 feet).
HDGuru - PDF Seating Distance Chart
Below is the HD Guru HDTV Seating Distance Chart. It is based on human preception of detail. . [/b]Sitting at the optimum 720p distance using a 1080p display will yield no improvement in picture quality due to limits of our vision[/b]. In other words, if you plan to sit too far back from a given size 1080p, consider changing to a 720p HDTV or purchasing a larger 1080p HD set. Otherwise you will be wasting money by paying for higher resolution you can’t see.All screen sizes are in diagonal inches and all viewing distances are in inches. An example the 42" screen size:
To see all the high definition of a 42" 720p display requires a maximum viewing distance of 98.83 inches or 8.235 feet. If the 42" display is either 1080i or 1080p the maximum viewing distance for full visual resolution is 65.89 inches or 5.49 feet. If you view at a greater distance you will not achieve full visual resolution of all the detail.
Bottom line, you need to sit closer to a 1080 display than a you would with a 720p HDTV.
#17 gi-jones 17 år siden
I min stue sidder jeg vel ca. 3-3.5 meter fra mit tv, der er et 1366x768 LCD. Jeg kan se en kæmpe forskel på en almindelig DVD og et 720p signal. Ifølge diagrammet er det helt nede i bunden af skalaen, hvor der knap nok er nogen forskel. Ikke desto mindre ville jeg tage en "blindtest" any day.
#18 pulse83 17 år siden
En lille interessant side i den sammenhæng:
http://www.plasma-lcd-fakta.dk/
#19 Bony 17 år siden
Er dette ikke lidt mærkeligt at skrive?
"LCD-skærme kan forekomme mere detaljerede i butiksmiljøer på grund af billedernes lysstyrke og skarphed. Men reelt kan sådanne ekstreme lysstyrke- og skarphedsniveauer faktisk se grove og urealistiske ud i et hjemligt miljø. Selvom det er vigtigt for et tv-billede at være meget detaljeret, bør det altid se naturligt ud."
Hvorfor skulle det ikke kunne se naturligt ud i et hjemligt miljø? Det kommer vel i ligeså stor grad an på hvad der bliver vist derpå. Og "skarpheden" forværres vel ikke af den grund?
#20 filmz-Bruce 17 år siden
Dette diagram viser den længste anbefalede afstand fra skærmen, sammenhæng med skærmstørrelsen.
Har du et 37" og 720p er den maksimale anbefalede afstand fra skærmen omkring 7.5 feet, ca 2.3 meter fra skærmen. Sidder man tættere, får man endnu mere "bang for the buck", fordi øjet kan se endnu flere detaljer. Det er vor evne til at skelne detaljer, som er med til at bestemme fordelen mht. afstand fra skærmen.