No, no son pulgadas / píxeles :-(

En ese contexto, se refiere a la capacidad de resolución del TV para el caso de señal de televisión digital. El tema es muy extenso para tratarlo aquí, pero las referencias que ofrezco son bastante completas. No tiene que ver exactamente con la codificación MPEG2 para el video ( cuadros I, P, B - favor tomar en cuenta que estos se representan con letras mayúsculas)

Es un tipo de resolución, por eso los distintos números que aparecen en la lista que nos presentas, de menor a mayor=mejor resolución de imagen). Encontré esta explicación:

Resolution i/p

Input resolution describes the number of sampling, points per linear measurement, that a device is capable of recording. The higher the input resolution, for a given distance of original, the greater the amount of information that will be captured and the larger the data file will be. It is entirely possible for an image to be scanned with too high an input resolution for a given output requirement. Over sampling does not enhance quality and may well dramatically reduce the efficiency of the system or network trying to handle the file.

http://www.ppa.co.uk/cgi-bin/wms.pl/74

Tomás is partly correct: these are professional video broadcast terms, and should not be translated. However, they have nothing to do with the "I" "B" and "P" terms that Tomás mentioned as being used in video compression (which refer to Image, Bidirectional and Predicted frames, respectively).

What the "I" and "P" refer to here are "Interlaced" and "Progressive" scan sequences used in HDTV systems. Historically, the NTSC video broadcast system has used interlaced video, where thetre are 30 frams of vide per second, and each full frame of video consists of 525 individual lines of pixels, divided into two "fields". The first field consists of all the odd-numbered lines, and the second field being all the even numbered lines. When your TV "draws" each frame on the screen, it first "paints" all the odd-numbered lines, the INTERLACES the even numbered lines afterwards. There are very good technical reasons for doing this, among them smoother motion for fast-moving objects.

However, in the new HDTV (high definition) system, the method used for some formats is progressive scan, where the entre frame is painted all at once, one line after another (the same as computer graphic screens have always done).

For purposes of compatibility, the "interlaced" system is also still used in the HDTV standard. In fact, the HDTV standard consists of a total of 32 possible different picture sizes, frame rates, and scan sequences, and these are identified by a number followed by a letter. The number indicates the number of scan lines in the frame, and the letter indicates the scan sequence. So in your example the "YPbPr, Audio L /R, 480i/p, 576i/p, 720p, 1080i" refers to a monitor that accepts component video signals (Y-Pb-Pr), two channels of audio (Left and Right) and is capable of operating in any one of four HDTV modes: 480 lines interlaced, 576 lines interlaced, 720 lines progressive and 1080 lines interlaced.

Hope that helps to clarify.