Datavideo NVS-35, Инструкция по эксплуатации

Страница: 24 / 64

24

384K

256K

128K

64K

32K
Encoder Mode
The Encoder Mode sets the video bitrate mode for your video stream. The available
modes are listed as follows:

High (8M)

Medium (4M)

Low (2M)
Tip: You can also switch between different bitrate modes by pressing the Bitrate
button on the front panel. See Section 3.4 for details.
Profile
Profile
sets the H.264 encoding profile for your stream. The available options are
Baseline , Main , and High . Typically, High profile provides the best image quality and
is suitable in most instances. However, depending on the decoder used when
viewing the stream, such as with mobiles devices, a Main or Baseline profile may be
required.

High

Main

Baseline
Entropy
There are two coding options available for generating H.264 content:

CAVLC (Context-Adaptive Variable Length Coding)

CABAC (Context-based Adaptive Binary Arithmetic Coding)
CABAC encoding provides a 7-10% quality improvement over CAVLC but requires an
extra 10-15% CPU. CABAC encoding is only available in H.264 Profiles Main & High.
When targeting at low-powered devices, such as older cell phones and tablets, we
recommend the Baseline Profile that uses CAVLC which requires less computing
power.