Axis AXIS 231D+, Руководство по эксплуатации продукта, Страница: 33 / 40

Axis’ Motion JPEG, MPEG-4 and H.264 support / IPv6 and QoS / TECHNICAL CORNER 33
AXIS’ MOTION JPEG, MPEG-4 AND H.264 SUPPORT
INTERNET PROTOCOL VERSION 6 (IPv6) AND
QUALITY OF SERVICE (QoS)
Many Axis video products feature advanced real-time
video encoding that can deliver Motion JPEG, MPEG-4
as well as H.264 video streams. This gives users the
flexibility to maximize image quality for recording and
reduce bandwidth needs for live viewing.
Axis’ MPEG-4 (MPEG-4 Part 2) follows the ISO/IEC
14496-2 standard and provides Advanced Simple Pro-
file (ASP) at level 5. With a wide range of settings, it is
possible to configure the streams to be optimized for
both bandwidth and quality.
Axis’ H.264 (sometimes referred to as MPEG-4 Part 10/
AVC) follows the ISO/IEC14496-10 standard, and offers
further possibilities to reduce storage costs and to in-
crease the overall efficiency. Without compromising
image quality, an H.264 encoder can reduce the size of
a digital video file by more than 80% compared with
Motion JPEG and as much as 50% compared with the
previous MPEG-4 Part 2 standard.
The Axis Media Control (AMC) includes both an
MPEG-4 and an H.264 decoder which makes viewing of
streams and integration into applications easy.
Furthermore, Axis’ multicasting support enables an un-
limited number of viewers without sacrificing network
system performance.
As more and more devices are added to networks and
to the Internet, IP addresses (the address that individu-
ally identifies each unit) are becoming a scarce
resource. To handle this, a successor to the current IP
protocol version 4, has been adopted: Internet Protocol
version 6 (IPv6). The main improvement brought
by IPv6 is the increase in the number of addresses
available for networked devices. Other important
improvements are in areas such as routing and network
auto-configuration. Products that support IPv6 will be
well prepared for the future, as IPv6 becomes more
widely used. As different networks, such as telephone, data and
video (CCTV) all continue to merge into a single IP
network, it becomes more and more important to
control the sharing of network resources, to fulfill the
requirements of each service.
One solution is to have network equipment treat
different types of services (voice, data, video) differ-
ently as the traffic passes through the network. By
using Quality of Service (QoS), network applications
can co-exist on the same network, without consuming
each other’s bandwidth. QoS makes it possible to pri-
oritize traffic, thus creating a more reliable network.