Bosch FW5.50 User Manual

en | Encoder Settings

Camera Browser Interface

AM18-Q0611 | v5.50 | 2012.03

Software manual

Bosch Security Systems

if necessary, use the expert settings to adapt the I-frame quality 

and the P-frame quality to specific requirements. The setting is 

based on the H.264 quantization parameter (QP).

Select the structure you require for the Group of Pictures 

(GOP). Depending on whether you place greater priority on 

having the lowest possible delay (IP frames only) or using as 

little bandwidth possible, you choose IP, IBP or IBBP.

Select the appropriate averaging period as a means of 

stabilizing the long term bit rate.

Use the slider to set the distance between I-frames to Auto or 

to between 3 and 60. An entry of 3 means that every third 

image is an I-frame.The lower the number, the more I-frames 

are generated. 

In the H.264-protocol, the Quantization Parameter (QP) 

specifies the degree of compression and thus the image quality 

for every frame. The lower the QP value, the higher the 

encoding quality. A higher quality produces a higher data load. 

Typical QP values are between 18 and 30. Define the lower limit 

for the quantization of the P-frames here, and thus the 

maximum achievable quality of the P-frames.

This parameter sets the ratio of the I-frame QP to the P-frame 

QP. For example, you can set a lower value for I-frames by 

moving the slide control to a negative value. Thus, the quality of 

the I-frames relative to the P-frames is improved. The total data 

load will increase, but only by the portion of I-frames.