Bosch Appliances VOT-320 Encoding interval, Video resolution, Expert Settings, GOP structure

42 en Configuration using a Web browser VOT-320

Encoding interval

The setting selected here determines the interval at which images are encoded and transmitted. The image rate in ips (images per second) is displayed next to the text field.

Video resolution

Here you can select the desired resolution for the video image. At present only the following resolution is available:

–QVGA

320 × 240 pixels

Expert Settings

You can use the expert settings to adapt the I-frame quality and the P-frame quality to specific requirements, if necessary. The setting is based on the H.264 quantization parameter (QP).

GOP structure

Select the structure you require for the Group of Pictures here. Depending on whether you place greater priority on having the lowest possible delay (IP frames only) or using as little bandwidth as possible, you can choose between IP, IBP, and IBBP.

I-frame distance

This parameter allows you to set the intervals in which the I-frames will be coded. With the Auto setting, the encoder inserts I-frames as necessary. An entry of 3 indicates that only every third image is an I-frame; the frames in between are coded as P-frames.

I-frame quality

This setting sets the image quality of the I-frames. Select Auto to ensure that the maximum bit rate is not exceeded. Auto automatically follows the P-frame image quality.

P-frame quality

This setting adjusts the maximum image quality of the P-frames. Auto automatically adjusts to the optimum combination of movement and image definition (focus).

The value 9 represents maximum image quality, a value of 51 represents minimum quality. With the slide control, define a control range from a chosen value to 51. The encoder delivers the best possible quality within this control range while maintaining the maximum bit rate.

Default

Click Default to return the profile to the factory default values.

DOC V4.5 2010.09 Installation and Operating Manual Bosch Sicherheitssysteme GmbH