Vivotek PT8133 User Manual page 75

On the other hand, if Fixed quality is selected, all frames are transmitted with the same quality;
bandwidth utilization is therefore unpredictable. The video quality can be adjusted to the following
settings: Medium, Standard, Good, Detailed, and Excellent. You can also select Customize and
manually enter a value.
The H.264 mode has similar settings with that of the MPEG-4 mode as previously mentioned, yet it offers
a higher compression rate for saving storage and network bandwidth. On the other hand, it requires
higher computing resources to decorde the video on the receiver's side.
JPEG
If mode is selected, the Network Camera continuously sends JPEG images to the client, producing
a moving effect similar to a filmstrip. Every single JPEG image transmitted guarantees the same image
quality, which in turn comes at the expense of variable bandwidth usage. Because the media contents
are a combination of JPEG images, no audio data is transmitted to the client.
There are three parameters provided in MJPEG mode to control the video performance:
■ Frame size
Select the video size. Note that a larger frame size takes up more bandwidth. The frame sizes are
selectable in the following resolutions:
WXGA 1280 x 800
hd720 1280 x 720
Custom 640 x 400
Custom 320 x 200
■ Maximum frame rate
This limits the maximum refresh frame rate per second. Set the frame rate higher for smoother video
quality. The frame rates are selectable at 1fps, 2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps, 25fps, and
30fps. You can also select Customize and manually enter a value.
■ Video quality
The video quality can be adjusted to the following settings: Medium, Standard, Good, Detailed, and
Excellent. You can also select Customize and manually enter a value.
NOTE:
► The Custom value you enter for Video quality here is related the Compression rate of each still JPEG
image. A lower value produces higher JPEG image quality.
VIVOTEK
User's Manual - 75