Bueno, me alegro de que el hilo se haya reconducido al debate original. Sigo intrigado por la cantidad de gente que dice que el interpolado es malo, sobre todo los que decís que os basáis en tener las dos TVs y sigo aun así sin estar convencido, ¿No será que comparáis teles con tamaños y/o distancias de visionado diferentes?
Vamos a entrar si os parece más al detalle
Esta es la madre del cordero y es el argumento con el que no estoy de acuerdo. Al hacer el escalado de una señal 720x576 a una 1280x720, dices que la imagen pierde mucho. Sin embargo, los fabricantes de algoritmos / chips de escalado como Faroudja o Gennum dicen que la calidad mejora, y tanto más cuanto más es la resolución a la que escalas y por tanto tienes más pixeles para trabajar la interpolación. Esto es debido a que la televisión no se inventa los pixeles así como así, sino que los algoritmos de interpolación están muy bien diseñados para restaurar lo más posible la imagen real, que siempre es continua, no discreta, y por tanto se presta bien a interpolar. Esto lo hacen también las cámaras de vídeo digitales modernas basadas en filtros de Bayer,que prefieren ganar resolución a costa de tener que interpolar la información de color (
http://en.wikipedia.org/wiki/Bayer_filter).
Por argumentar mi razonamiento con opiniones de otros, y atendiendo una petición que hacía un compañero, adjunto artículos e hilos de otros foros al respecto:
http://www.projectorcentral.com/1080p_720p.htm
"On a 720p projector, the DVD signal is rescaled to 720 lines, and on a 1080p projector it is rescaled to 1080 lines. Assuming the use of a high quality upscaling DVD player or video processor, there is the potential that the 1080p image will look a tiny bit better than the 720p picture"
http://www.thebestplasmatv.com/guides/720p-vs-1080p/
"Screen Size, Resolution and Viewing Distance: This trio is the base for obtaining the best picture quality and amount of detail from your HDTV. There is a relation between the three and if you get them right you will get the best picture quality no matter if you choose 720p vs 1080p or you decide to go for the extra detail offered by 1080p. Unless you have the correct numbers for these three sizes, you can end up seeing the same detail from 1080p as you would from 720p. Worse than that, you might even get a poor experience from 720p and a very bad one from standard definition (SD) content like many TV programs."
http://www.soundandvisionmag.com/fe...ts-and-fallacies-scaling-and-rules-page4.html
"When converting to a resolution higher than that of the incoming signal — from 480p (852 x 480 pixels, horizontal by vertical, in a 16:9 frame) to 720p (1,280 x 720 pixels), for example, or either of those resolutions to 1080p (1,920 x 1,080) — a scaler has to interpolate between pixels in a frame to create new ones. It is not a simple stretching process. In fact, it usually will result in a completely new set of pixels mathematically generated from the originals. Good scalers use sophisticated alogorithms to arrive at optimum pixel values not only in the context of the current frame but also with respect to preceding and succeeding frames, so that motion is smooth and natural looking."
http://www.networkedmediatank.com/showthread.php?tid=9924
"As for scaling its also a general misunderstanding that first scaling to 720p is better for screens that are 1024x768 or 1366x768 - this is not true. Scaling is allways best to as high a resolution as possible - because this gives the screens scaler a higher pixelcount to work with when rescaling to native resolution"
http://www.besthdtvscreen.com/guides/720p-vs-1080p-images
"Note: There is a difference between how upscaled content looks and how content of native resolution looks. Content of a lower resolution (720p), when upscaled and displayed on a high resolution display (1080p) looks better than lower resolution content (720p) being displayed on a lower resolution display (720p). In most cases 720p upscaled and displayed on 1080p TV looks better than 720p content displayed on 720p TV. The difference is not easy to see in many cases but it exists."
