User`s manual

VPort 25 User’s Manual System Configuration

4-27

For MPEG4, users can setup Resolution, Frame Rate and Video Quality in Fixed Bit Rate or

Fixed Quality.

Resolution

The VPort 25 supports 5 different resolutions: Full D1, 4CIF, VGA, CIF, and QVGA.

Setting Description Default

Select the image size

5 image resolutions (size) are provided.

The administrator can choose each option

with NTSC or PAL modulation.

720 x 480 in NTSC or 720 x

576 in PAL

Resolution NTSC PAL

Full D1

720

x 480 720 x 576

4CIF

704

x 480 704 x 576

VGA

640

x 480 640 x 576

CIF

352

x 240 352 x 288

QVGA

320

x 240 320 x 288

Frame Rate (Frame per second)

Setting Description Default

Maximum frame rate

The maximum frame rate is different to

accommodate different modulations of

video input. Administrators can also set

up the maximum frame rate to optimize

the bandwidth’s occupation.

30 for NTSC 25 for PAL

Key frame interval

(Only for MPEG4)

Administrators can set up the key frame

interval to determine the video quality.