3. IPTV =(IP) + (TV) ?
Internet Protocol + Television
Closed and managed network
IPTV is a secure closed system with
premium content and managed QoS,
particularly for video
Internet TV
Best effort video service
Video on demand (Push and pull)
5. What is IPTV?
To Broadcasters,
IPTV (or broadband television) is simply “ a new
emerging platform for distributing digital
television channels to home consumers using a
TV screen”
To Telecom Industry,
IPTV is synonymous with a new opportunity to
take part in an attractive and dynamic media
market
To Content Producer,
A new way to reach consumers and generate
increased revenue and profits
6. Why IPTV ?
Bandwidth efficient towards the access
network
Channel switching is performed in the network
Infinite number of channels
Interactive (two-way)
Bi-directional: IP Transport
anything, any time, any where, any device
Time Shifted TV
Signal are purely digital
7. Bandwidth Requirements: IPTV
IPTV with MPEG-2 compression
Standard Definition 3.5Mbps
High Definition 19.3Mbps
IPTV with MPEG-4 compression
Standard Definition 2.0Mbps
High Definition 8.0Mbps
11. IPTV Terms Relative to Normal TV
Waiting Time
Delay (IPTV)
Channel changing time (zapping)
Buffering
QoS
QoE
12. Understanding Delay
Propagation Delay
Processing Delay
Queuing Delay
Compression Delay
Transmission Delay
Electronic Delay
Resynchronization Delay
Decompression Delay
Presentation Delay
SENDER SIDE NETWORK RECEIVER SIDE
Delay is the amount of time that a packet
takes to travel from the sender’s application to
reach the receiver’s destination application
Caused by codecs, router queuing delays, …
18. IPTV Network Distribution Technology
Through a network built with fiber
Via an DSL network
Via a cable TV network
Via a satellite based network
Via a fixed wireless broadband connection
Via the Internet
19. New Technologies: The Challenges
IPTV requires new technology in
Access networks
Compression
Middleware
Customer premises equipment (CPE)
Improved codec, access, server, & CPE technology:
MPEG-4 AVC (H.264) next generation codec
improvements
New ADSL2+, VDSL2, FTTx, DOCSIS 3.0 access
technologies
IP enabled Set top Box
Digital Right Management (DRM)
20. Emerging Technology: Layered Multicast
Receiver-based schemes
The source sends data in each layer without
regarding to network situation
Receivers increase/decrease their receiving rates by
constantly join/leave a layer
Coarse control
LeaveJoin
Join interval Leave intervalReceiverSource
Data
Layer 1
Layer 2
Layer 3
Layer 4
~
1 layer = 1 multicast group
21. Emerging Technology: Layered Multicast…
Receivers having more capacities join more layers
Receiver 1 Receiver 2
Source
Router
1Mbps 2Mbps
1Mbps
1Mbps
1Mbps
=2Mbps
For instance : MPEG
video transmission
I frame = layer 1
P frame = layer 2
B frame = layer 3
30. IPTV -“NO” Limitation Media
IPTV and Broadband Multimedia Services
crosses the limitations of the Cable &
Satellite medium
“PRACTICALLY NO LIMIT “ for
Television/ Video content
If the Infrastructure is updated – The
Robustness of IP is the Robustness of this
platform
33. End-user QoE Types
Streaming QoE
End-user QoE affected just by voice and video
impairments
Video frame freezing
Voice drop-outs
Lack of lip sync between voice and video
Interaction QoE
End-user QoE also affected by additional interaction
effort in a conversation
“Can you repeat what you just said?”
“This line is noisy, lets hang-up and reconnect…”
34. History of the Media
Capturing
device
Transmission
Receiver
Medium
Camera
TV
Air
Cable
Satellite
TV
PC
PC
WWW
(Tel.netz)
Internet
Microp
hone
Radio
Wave
Cable
Satellite
Radio
PC
Paper
Truck
Train
Print
35. Media Today
Video
on-demand
Print
(on demand)
Web -
Radio
WWW
(HTML)
TV
(Live)
Broadband
UMTS / ADSL
IP over TV
Mediaserver
Cinema Working place
electronical
paperLiving room mobile
device
small unit
(Telephone
Clock with
MPEG-
Player)
Cinema
Medium
Transmission
Receiver
Compression
36. ISO OSI reference model
The seven layers
Each layer hides complexity of lower layer
Layering enforces modularity
37. End-to-end layer: top 4 OSI layers
Network layer: OSI network layer
Link layer: bottom 2 OSI layers
A-P-S-T (top 4 layers) are
implemented in software
N-D-P (bottom 3 layers) are
implemented in hardware
38. The seven layers ………….
Network layer
Concatenate logically a set of links to form an
end-to-end link.
Compute a route
Segmentation and reassembly
Unique network-wide addresses – IP addresses
The beauty of IP is that we can layer it over
any data link layer technology
type-of-service in the IP
39. The seven layers ………….
Transport layer
Create the abstraction of an error-
controlled, and flow-controlled, end-to-
end link
Multiplex multiple applications to the
same end-to-end connection
Port number
40. The seven layers ………….
Best-effort network layer
- drops packets
- delays packets
- reorders packets
- corrupts packet contents
Many applications want
reliable transport
- all packets reach receiver…
- …in order they were sent
- no data corrupted
- “reliable byte stream”
Need a transport protocol,
e.g., Internet’s Transmission
Control Protocol (TCP)