Atlona AT-OMNI-122 handleiding
Handleiding
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AT-OMNI-121 / AT-OMNI-122
10
Network Bandwidth and OmniStream Compression
When sending video and audio over a network, the available bandwidth needs to be managed. Gigabit Ethernet
switches are very common and can take advantage of installed Category 5e cable. 10-Gigabit Ethernet switches
are available, but are more expensive per port and require Category 6A cable or better. The chart below shows
uncompressed data rates for common resolutions. These data rates exceed the available bandwidth of Gigabit
Ethernet, but using the compression technology in OmniStream, this video can be streamed over cost-eective
Gigabit networks.
Resolution Data Rate*
1920 x 1080p 30 Hz 2.2 Gbps
1920 x 1080p 60 Hz 4.5 Gbps
3840 x 2160p 30 Hz 8.9 Gbps
3840 x 2160p 60 Hz 17.8 Gbps
OmniStream compresses the source data at the encoder, before it is sent out over the network. This process is
known as encoding. OmniStream uses VCx and VC-2 compression, which are intermediate compression schemes
and is much more desirable than using a interframe compression scheme, such as H.264 or H.265. Interframe
codecs are typically used by cable or internet providers and use very aggressive bit rates (low bandwidth) with high
latency (delay), which results in lag. VCx and VC-2 provide both high quality (high bit rates) and very low-latency for
a much more desirable viewing experience.
* Data rate is shown without compression.
Streams
Sessions
The term stream is used throughout this manual, to describe the dierent types of signals that are transmitted over a
network. For example, if a blu-ray player is connected to an encoder, both video and audio are sent to the encoder
over an HDMI cable. The term video stream is used to identify the video portion of a signal and audio stream
identies the audio portion of the signal.
A session is a way of organizing audio and video streams. The session identies each stream with a unique multicast
IP address and UDP port assignment. This provides an address to determine where the package of audio and video
should be sent. Table 1.1 illustrates how a session encapsulates a video and audio stream.
Table 1.1 - Video and audio streams contained within a session.
UDP PortMulticast IP AddressVideo Stream
UDP PortMulticast IP AddressAudio Stream
Session
NOTE: Sessions are not limited to only video and audio streams. Control data, such as IR and
RS-232, as well as AES67 audio, can also be contained within a session. These topics will be
covered in a later chapter.
Introduction to OmniStream
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Productinformatie
| Merk | Atlona |
| Model | AT-OMNI-122 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 18571 MB |
Caratteristiche Prodotto
| Kleur van het product | Zwart |
| Gewicht | 700 g |
| Breedte | 208 mm |
| Diepte | 112 mm |
| Hoogte | 34 mm |
