1080i

It upconverts standard definition (480p) DVD content to HD (720p, 1080i or 1080p) to match the resolution of your HD display.

When connected to a DVD player, the projector's multiple inputs and 720p and 1080i signal support provide high definition content.

Though it is designed to run natively at 720p (1280 x 720 pixels), the Optoma's top resolution is 1080i. In terms of connectivity, you can feed in HD content via the 'Component' or 'HDMI' interfaces.

Philips's HTS9800W cinema-in-a-box features 6.1 Dolby Digital cinematic surround sound, video resolution of up to 1080i and wireless rear speakers.

It had to do with the difference between 1080i and 1080p.

Resolutions from VGA up to UXGA are supported and supported video formats include HDTV (1080i, 720p, 480i/p, 1030i), SDI 4:2:2:(270 Mb/s) PAL, SECAM and NTSC.

Responding to industry-wide demand for new HDV-enabled technology, Vegas 7 software offers full frame rate playback of native HDV on the Vegas timeline and includes improved memory for handling HDV 1080i longform projects.

Circuit City: Sony High-Definition 1080i Handycam, $1,999.99

The camera features three 1/3-inch CCDs with a total of 1.67-megapixels, along with the company's proprietary DIGIC DVII image processing engine and HD codec chip, allowing HD images to be recorded on a Mini DV tape in 1080i HDV-standard format.

The Sony "HDR-FX1" is the world's first consumer-level camera that supports Full HD 1080i (meaning 1080 horizontal lines of resolution).