HDTV Lounge


Difference Between 1080i and 1080p

Many of you might be asking what is the difference between 1080i and 1080p?, and is there a quality difference?

1080 refers to the number of lines per frame that your HDTV displays, 1080i shows 1080 lines interlaced, where 1080p shows 1080 lines progressive. With progressive each and every line is drawn and shown fully, where as interlaced, or interlaced scanning is where the odd-number scan lines are drawn in its first pass; then it starts over from the top of the screen to complete the image by scanning the even-number lines.

Theoretically progressive offers twice the resolution as both lines are show at once to show the “full hd” over the interlaced that only shows one half at a time. There has been much debate whether the progressive 1080p format does in fact look better to the human eye or not. In general most people say there is no visible difference, and the 1080p format is just a marketing hype.

Also you should note that most cable, and satellite services only broadcast in the 1080i format and only some Blu-Ray and HD-DVD discs will have the 1080p format.