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Was ist HDTV?
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runemaster
L13: Maniac
spike schrieb:runemaster schrieb:lol . bei dvds bringt der NISCHT .. die haben auch nur die TV auflösung drauf, aber die neuen geräte aus japan die auf einer dvd 22gb (ca) unterbringen und hdtv standarts speichern wären vielleicht ne tolle sache, wenn man sich dafür die filme dann importieren kann
Doch, auch bei "normalen" DVDs bringt das was. Ich hab das mal mit der DVD "Outbreak", auf einem unserer Plasma Bildschirme, ausprobiert. Der Unterschied zwischen "Progressive" und "Interlaced" Modus war gigantisch. Jedoch kostet der Plasma 6.500 und der DVD-Player, den ich verwendet habe, 3.000 Euro. Wobei das gleiche aber auch mit unserem zweitbesten DVD-Player Modell um 500 Euro funktionieren sollte.
achsoooo .. also wenn du hdtv mit progressive scan gleichsetzt, dann stimmt das natürlich, aber eigentlich isses ja nicht das gleiche
spike
L17: Mentor
XPG schrieb:
Doch der gibt auch ein Progressive Signal aus. Starfox Adventures war das erste Spiel, dass diesen Modus unterstützt. Steht auch hinten auf der Verpackung drauf.
Ach wie gerne hätte ich so einen TV. Progressive Scan ist doch wirklich was feines.
@Cloud
Was hast Du denn für den Panasonic bezahlt?
spike
L17: Mentor
Ich hab mir jetzt nochmal den Thread durchgelesen, aber so eine wirklich Antwort gabs nicht zur eigentlichen Frage. Aber hier ist die Antwort:
What Is HDTV?
If you have read How Television Works, then you know all about what is now called analog TV. In analog TV, a 6 MHz analog signal carries intensity and color information for each scan line of the picture. An analog TV signal in the U.S. has 525 scan lines for the image, and each image is refreshed every 30th of a second (half of the scan lines are painted every sixtieth of a second in what is called an interlaced display). The horizontal resolution is something like 500 dots for a color set.
This level of resolution was amazing 50 years ago, but today it is rather passe. The lowest resolution computer monitor that anyone uses today has 640x480 pixels, and most people use a resolution like 800x600 or 1024x768. We have grown comfortable with the great clarity and solidity of a computer display, and analog TV technology pales by comparison.
Many of the new satellite systems, as well as DVDs, use a digital encoding scheme that provides a much clearer picture. In these systems, the digital information is converted to the analog format to display it on your analog TV. The image looks great compared to a VHS tape, but it would be twice as good if the conversion to analog didn't happen.
There is now a big push underway to convert all TV sets from analog to digital, so that digital signals drive your TV set directly.
When you read and hear people talking about digital television (DTV), what they are talking about is the transmission of pure digital television signals, along with the reception and display of those signals on a digital TV set. The digital signals might be broadcast over the air or transmitted by a cable or satellite system to your home. In your home, a decoder receives the signal and uses it, in digital form, to directly drive your digital TV set.
There is a class of digital television that is getting a lot of press right now. It is called high-definition television, or HDTV. HDTV is high-resolution digital television (DTV) combined with Dolby Digital surround sound (AC-3). HDTV is the highest DTV resolution in the new set of standards. This combination creates a stunning image with stunning sound. HDTV requires new production and transmission equipment at the HDTV stations, as well as new equipment for reception by the consumer. The higher resolution picture is the main selling point for HDTV. Imagine 720 or 1080 lines of resolution compared to the 525 lines people are used to in the United States (or the 625 lines in Europe) -- it's a huge difference!
Of the 18 DTV formats, six are HDTV formats, five of which are based on progressive scanning and one on interlaced scanning. Of the remaining formats, eight are SDTV (four wide-screen formats with 16:9 aspect ratios, and four conventional formats with 4:3 aspect ratios), and the remaining four are video graphics array (VGA) formats. Stations are free to choose which formats to broadcast.
The formats used in HDTV are:
"Interlaced" or "progressive" refers to the scanning system. In an interlaced format, the screen shows every odd line at one scan of the screen, and then follows that up with the even lines in a second scan. Since there are 30 frames shown per second, the screen shows one half of the frame every sixtieth of a second. For smaller screens, this is less noticeable. As screens get larger, the problem with interlacing is flicker.
Progressive scanning shows the whole picture, every line in one showing, every sixtieth of a second. This provides for a much smoother picture, but uses slightly more bandwidth.
Quelle: www.howstuffworks.com
Link: http://entertainment.howstuffworks.com/hdtv1.htm
What Is HDTV?
If you have read How Television Works, then you know all about what is now called analog TV. In analog TV, a 6 MHz analog signal carries intensity and color information for each scan line of the picture. An analog TV signal in the U.S. has 525 scan lines for the image, and each image is refreshed every 30th of a second (half of the scan lines are painted every sixtieth of a second in what is called an interlaced display). The horizontal resolution is something like 500 dots for a color set.
This level of resolution was amazing 50 years ago, but today it is rather passe. The lowest resolution computer monitor that anyone uses today has 640x480 pixels, and most people use a resolution like 800x600 or 1024x768. We have grown comfortable with the great clarity and solidity of a computer display, and analog TV technology pales by comparison.
Many of the new satellite systems, as well as DVDs, use a digital encoding scheme that provides a much clearer picture. In these systems, the digital information is converted to the analog format to display it on your analog TV. The image looks great compared to a VHS tape, but it would be twice as good if the conversion to analog didn't happen.
There is now a big push underway to convert all TV sets from analog to digital, so that digital signals drive your TV set directly.
When you read and hear people talking about digital television (DTV), what they are talking about is the transmission of pure digital television signals, along with the reception and display of those signals on a digital TV set. The digital signals might be broadcast over the air or transmitted by a cable or satellite system to your home. In your home, a decoder receives the signal and uses it, in digital form, to directly drive your digital TV set.
There is a class of digital television that is getting a lot of press right now. It is called high-definition television, or HDTV. HDTV is high-resolution digital television (DTV) combined with Dolby Digital surround sound (AC-3). HDTV is the highest DTV resolution in the new set of standards. This combination creates a stunning image with stunning sound. HDTV requires new production and transmission equipment at the HDTV stations, as well as new equipment for reception by the consumer. The higher resolution picture is the main selling point for HDTV. Imagine 720 or 1080 lines of resolution compared to the 525 lines people are used to in the United States (or the 625 lines in Europe) -- it's a huge difference!
Of the 18 DTV formats, six are HDTV formats, five of which are based on progressive scanning and one on interlaced scanning. Of the remaining formats, eight are SDTV (four wide-screen formats with 16:9 aspect ratios, and four conventional formats with 4:3 aspect ratios), and the remaining four are video graphics array (VGA) formats. Stations are free to choose which formats to broadcast.
The formats used in HDTV are:
- 720p - 1280x720 pixels progressive
1080i - 1920x1080 pixels interlaced
1080p - 1920x1080 pixels progressive
"Interlaced" or "progressive" refers to the scanning system. In an interlaced format, the screen shows every odd line at one scan of the screen, and then follows that up with the even lines in a second scan. Since there are 30 frames shown per second, the screen shows one half of the frame every sixtieth of a second. For smaller screens, this is less noticeable. As screens get larger, the problem with interlacing is flicker.
Progressive scanning shows the whole picture, every line in one showing, every sixtieth of a second. This provides for a much smoother picture, but uses slightly more bandwidth.
Quelle: www.howstuffworks.com
Link: http://entertainment.howstuffworks.com/hdtv1.htm
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