Video over IP - TechLink

slateobservantNetworking and Communications

Oct 26, 2013 (3 years and 11 months ago)

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Produced by and Copyright,
2012


Phil Hippensteel
Associates

The Explosion of
Video in Telecom



Dr. Phil Hippensteel

pjh15@psu.edu


(
717) 448
-
0552

2


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

How Big is IT?


“Cisco Predicts
Zetabyte

of Video by
2015”


“Microsoft Buys Skype for $8.5 Billion.”


”Video conferencing becomes
commonplace over the Internet



NetFlix

Becomes Number One Internet
App in the Evening”


Internet TV Takes Off


3


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

Forms of Video


Type 1: Broadcast one source to many
receivers: over
-
the
-
air, Comcast, FIOS, U
-
Verse.



Type 2: One
-
to
-
one or one
-
to group: video
conferencing.



Type 3: Streamed from a server: Netflix,
Hulu

+, YouTube.

4


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

Three Main Techniques


Analog or digital broadcast from antenna to
antenna.


UDP over IP protocols (Comcast, FIOS)


Delivery in Internet type packets.


No retransmission of lost data.


Very high quality network needed.


TCP/IP or HTTP/TCP/IP (Internet TV, YouTube,
Netflix)


Retransmissions of lost data possible.


Minimum of several seconds/minutes of delay to start
play out.

5


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

What Are the Trends?


Over the air is decreasing.


Video conferencing is dramatically
increasing.


Streaming is increasing.


End points are becoming very diverse.


In size


In connection method.


Wireless connections are increasing.

6


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

What are the Challenges?


Video can consumes huge amounts of
bandwidth.


1280i HD takes about 8
-
20 Mbps.


Typical mobile bandwidth: 1
-
3 Mbps (average,
not peak).


Video traffic should be segregated on
networks.


Mixing with
bursty

data is problematic.


Such network designs can be difficult.



7


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

New Technology Changes


SVC: scalable video coding.


DASH: dynamic adaptive streaming.


H.265 compression


Half the bandwidth of H.264, one
-
fourth of
MPEG
-
2.


Browser based (
pluggin
) video
conferencing client.


Wifi

at gigabit speeds (802.11 ac)

8


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

Quote


“The Internet will never carry high quality
voice and certainly not video”






Phil
Hippensteel
,

2001

9


Produced by and Copyright,
2012


Phil Hippensteel Associates
,

QUESTIONS?