Few questions: Upscale SD to HD?

[nic3]

- From a "classic" DVD (4GB) it is possible to increase resolution from 720x480 to 1280x720 and make a HD rip? the DVD bitrate can provide a good quality for 720p or FullHD resolution?

- What bitrate (video & audio) is needed for a resonable HD file?

[edDV]

Upscaling doesn't improve resolution. Some filtering tricks like edge sharpening can make it look less bad.

There is no benefit to upscaling a 720x480 DVD file. The decode, recode loss is killer.

DVD players, HDTV sets and computer display cards will deinterlace or inverse telecine and upscale from a simple decode. The better hardware upscalers have adaptive filtering and noise reduction.

If you were to software upscale, you would need to add proportional bitrate or change codecs for the same bit rate. For ballpark, 1080i TV uses 12-19 Mb/s for MPeg2 or about 6-10 Mb/s for h.264.

[jagabo]

- Using a "classic" DVD (4GB) it is possible to increase resolution from 720x480 to 1280x720 and make a HD rip? the DVD bitrate can provide a good quality for 720p or FullHD resolution?

- What bitrate (video & audio) is needed for a resonable HD file?

Are you talking about something that will play on a standard DVD player? No, DVD players can't play HD video.

You can put HD video on a DVD for Blu-ray players. The bitrate needed depends on the source.

[nic3]

Not for standalone dvd player.
Just wondering if it's possible to make a HD rip from a dvd source.
Seems not.

[jagabo]

It's possible to upscale SD to HD before compression. But it's generally not worth it. The best software upscalers are better than the best hardware upscalers but they are slow. Compressing the larger frame is slower. More bitrate is needed for the larger frame size. And once your done you're stuck with whatever quality you get. It may be better than your TV or DVD player can do today, but future TVs and DVD players may do even better. But since you're files have already been upscaled you won't be able to take advantage of that.

Keep in mind that upscaling doesn't really create HD video, only HD frame sizes. The best upscalers try to keep the image sharp without creating artifacts. But the result doesn't have all the real detail that HD video has. For example, if you took a 1080p Blu-ray video, downscaled it to DVD frame size, then upscaled that with the best upscaler you could find, it would not have all the real detail of the original Blu-ray video.

[redwudz]

nic3, I changed your title to go along with our rules.

Moderator redwudz