Vivotek PT7137 User Manual download pdf (Page 37)

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User's Manual - 37

Audio and Video

General

“Configure for computer viewing” To make quick setting for computer viewing

“Configure for mobile viewing” To make quick setting for cell phone viewing

Video Settings

“Video title” The text string can be displayed on video

“Color” Select either for color or monochrome video display.

“Frame Size” There are four options for video sizes. “160x120”, “176x144”,

“320x240”, “640x480”.

“Power line frequency (for fluorescent light)”, the fluorescent light will flash

according to the power line frequency that depends on local utility. Change the

frequency setting to eliminate uncomfortable flash image when the light source is only

fluorescent light.

There are three dependent parameters provided for video performance adjustment.

“key frame interval”

“Max frame rate” This limits the maximal refresh frame rate, which can be combined

with the “Video quality” to optimize bandwidth utilization and video quality. Choose

“Constant bit rate” If the user wants to fix the bandwidth utilization regardless of the

video quality or choose “Fixed quality” and select the desired bandwidth. The video

quality may be poor due to the sending of maximal frame rate within the limited

bandwidth when images are moving rapidly. Consequently, to ensure detailed video

quality (quantization rate) regardless of the network, it will utilize more bandwidth to

send the maximal frames when images change drastically.

“Maximum Exposure Time” Select a proper maximum exposure time according to

the light source of the surroundings. The exposure time are selectable at the following

duration: 1/120 second, 1/60 second, 1/30 second, and 1/15 second. Shorter exposure

time would accept less light amount.

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Vivotek PT7137 User Manual Page 37