User manual

Functional Descriptions 391

HDTV 1080i29.9

When selected the camera will transmit 1080 lines of vertical resolution, with a horizontal

resolution of 1280 pixels and an aspect ratio of 16:9, implying a horizontal (display) resolution of

1920 dots across and a field resolution of 1920 × 1080 or over two million pixels, interlaced

scanned at a field rate of 29.97Hz to an attached HD compatible monitor.

HDTV 1080i25

When selected the camera will transmit 1080 lines of vertical resolution, with a horizontal

resolution of 1280 pixels and an aspect ratio of 16:9, implying a horizontal (display) resolution of

1920 dots across and a field resolution of 1920 × 1080 or over two million pixels, interlaced

scanned at a field rate of 25Hz to an attached HD compatible monitor.

NOTE

Progressive segmented Frame (PSF) is a High Definition video format used to store

progressive content on interlaced media.

Each progressive frame is segmented into two interlaced fields without inter-field motion, or

"combing". PSF is an alternative to 3:2 pull-down, wherein certain frames are "pulled down"

across multiple fields, resulting in output with an irregular frame rate.

Motion picture film cameras produce progressive images, usually at 24 frames per second. In

order to display those images on NTSC television, whose frame rate is 29.97 frames per second

interlaced (59.94 fields per second), each frame must be split into alternating groups of 3 and 2

fields. This is known as 3:2 pull-down.

Certain high definition tape formats, such as HDCAM allow frame rates other than 29.97.

Therefore, it's possible when using PSF to store "true" 24 frames per second progressive

images without pull-down, which then play back at the original frame rate. Thus the 24psf and

23.976psf (for compatibility with NTSC) formats were devised, which exist on tape as 48 (or

47.952) fields per second interlaced. When set up correctly, a progressive scan monitor will

read these interlaced fields two at a time, and display each pair as a single progressive frame,

temporally identical to the source. PSF content can also be played back on interlaced displays,

but the image will flicker.

HDTV 1080psf30

Will scan at a frame rate of 30Hz.

HDTV 1080psf29.9

Will scan at a frame rate of 29.9Hz.

HDTV 1080psf25

Will scan at a frame rate of 25Hz.