Encoder Settings; Introduction To Encoder Settings; Encoder Profile - Sony SNC-HMX70 User Manual

Encoder Settings

Introduction to encoder
settings
The encoder settings determine the characteristics of the
four streams generated by the camera. The types of
streams that can be generated are:
– HD streams
– SD streams
– I-frame only streams for recording
– M-JPEG streams
The bit rates, the encoding interval, and the Group-of
-Pictures (GOP) structure and quality, are defined and
stored for eight different profiles on the Encoder Profile
page. The SD (Standard Definition) resolution is also
selected here.
The resolution of the two H.264 streams and the
pre-defined profile to be used for each stream is selected
on the Encoder Streams page. The maximum frame
rate and quality of the JPEG stream is also selected here.
The streams and profiles for recording are selected on
the Recording Profiles page.
The Encoder Regions page allows you to select
different quality levels for various areas of the image.
This can help in reducing the bit rate. For example,
important objects can be selected to provide higher
quality encoding than selected background areas.

Encoder Profile

Profiles are rather complex and include a number of
parameters that interact with one another, so it is
generally best to use the pre-defined profiles. Only
change a profile if completely familiar with all the
configuration options.
Pre-defined profiles
Eight definable profiles are available. The pre-defined
profiles give priority to different parameters.
– Profile 1
High resolution for high bandwidth connections
– Profile 2
High resolution with lower data rate
– Profile 3
High resolution for low bandwidth connections
– Profile 4
Standard resolution for high bandwidth connections
– Profile 5
Standard resolution with lower data rate
– Profile 6
Standard resolution for low bandwidth connections
– Profile 7
Standard resolution for DSL connections
– Profile 8
Low resolution for mobile phone connections
Changing a profile
To change a profile, select it by clicking its tab and then
change the parameters within that profile.
If a setting outside the permitted range for a parameter is
entered, the nearest valid value is substituted when the
settings are saved.
Profile name
If required, enter a new name for the profile.
Target bit rate
To optimize use of the bandwidth in the network, limit
the data rate for the device. The target data rate should
be set according to the desired picture quality for typical
scenes with no excessive motion.
For complex images or frequent changes of image
content due to frequent movements, this limit can
temporarily be exceeded up to the value entered in the
Maximum bit rate field.
Maximum bit rate
This maximum data rate is not exceeded under any
circumstances. Depending on the video quality settings
for the I-frames and P-frames, this can result in
individual images being skipped.
The value entered here must be at least 10% higher than
the value entered in the Target bit rate field. If the value
entered here is too low, it is automatically adjusted.
Encoding interval
The Encoding interval slider determines the interval at
which images are encoded and transmitted. This can be
particularly advantageous with low bandwidths. The
image rate in ips (images per second) is displayed next
to the slider.
Standard definition video resolution
Select the desired resolution for the standard definition
video image.
Note
These resolutions are not used by a HD stream.
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