Its an analog world'

1
(No Transcript)
2
We are analog creatures.
Its an analog world.
We produce analog.
We consume analog.
This is not going to change anytime soon.
3
Telecommunications
4
Byting the Bullet
Digital Deployment Resources for the
University Residential Environment
- DTV Broadcast - Digital Satellite - Digital
Cable - University IP Network
- Basic Concepts - Definition of Common Terms -
Integrating the Technologies - Stakeholder
Concerns
Implications For the University Residential
Service Model
Burning Questions
5
Customer Premises Equipment (CPE)
Over-The-Air Digital Broadcast Television
JPEG MPEG Windows Media Real Quick Time etc, etc
JPEG MPEG Windows Media Real Quick Time etc, etc
VSB-8 19 MBit Capacity per 6MHz Channel
1-2 HDTV Multiple SDTV
Simple
Easy
Very Conducive to Bulk Service
UNENCRYPTED
6
Digital Broadcast Television CPE
FCC rule directed Broadcast Flag implementation
effective July 1, 2005 Court struck down this
ruling May 6, 2005.
Encrypted to the Point of Viewing
Analog Hole
Encoder
X
0101011010101010
ENgt crypt
ltDE crypt
1
X
Selectable Outputs
Broadcast Flag
The value of digital property is dependent upon
the owners ability to protect it against
unauthorized use.
7
Digital Broadcast Television
Analog Retransmission
VSB Processing
Frequency Translator
101010101101010
8
Digital Broadcast Television VSB Processing
9
Digital Broadcast Television
VSB QAM Transcoding
Transcoder
QAM-256
10
VSB vs. Multiplexed QAM
Program and System Information Protocol (PSIP)
VSB Input
11
VSB vs. Multiplexed QAM
Program and System Information Protocol (PSIP)
VSB Input
12
Multiplexed QAM Input
13
Multiplexed QAM Input
14
Multiplexed QAM Input
15
Multiplexed QAM Input
16
Multiplexed QAM Input
17
Multiplexed QAM Input
18
Multiplexed QAM Input
19
Channel Brands
The QAM signal is robust enough, and the digital
receivers are tight enough to function even in
environments with strong local analog
over-the-air broadcasts.
Go ahead and use the broadcasters Branded
channel, even if there is strong local analog
present.
20
Digital Broadcast Television
VSB IP Transcoding
Transcoder
21
PSIP contains several information
Tables Expect Mixed Results with Transcoding
Depends on -
Transcoder - ATSC Tuner
(or IP Viewer) -
Broadcaster Implementation
22
10100011110010101
10100011110010101
ENgt crypt
Digital Satellite
NDS Nagra Irdeto Digicipher etc, etc
NDS Nagra Irdeto Digicipher etc, etc
Most programming of commercial value is encrypted
QPSK Satellite Channel (Transponder) 30 - 40 Mb
Receive Antenna to Receiver Link is L-Band (950
2150 MHz)
L-Band NOT conducive to Extended Wired
Distribution Networks
23
Digital Satellite Signal Processing
Analog Retransmission
QPSK QAM Transcoding
1 Transponder
1 CATV Ch (6 MHz)
Transcoder
ltDE crypt
ENgt crypt
Pod
24
Digital Satellite Signal Processing
ltDE crypt
ltDE crypt
10101010110101000101010
Cherry Pick Multiplex
Brand M
ENgt crypt
ltDE crypt
10101010110101011100101
QAM Modulator
Brand S-A
1010101011011110101010
25
Digital CATV
QAM - 64 26 Mb Capacity per 6MHz Channel _at_3-4
Mb 7 SD Services
Modulation Error Ratio
QAM - 256 38 Mb Capacity per 6MHz Channel _at_3-4
Mb 10 SD Services _at_8 Mb 4-5 HDTV
Services _at_19 Mb 2 OTA VSB-8 broadcast streams
26
Digital Set-Top Box
Channel Map
Table of Information about the Virtual Channel
Numbers (VCN)
Virtual Channel Table (VCT)
27
Channel Map
Channel Map Instructions for STBs with Channel
Map (VCT) 4465
28
Channel Map Other Utility Information
RF Connection
Encryption Keys
Program Guide Info
Virtual Channel Table
OOB
In-Band delivery of utility type information
(Metadata)
Data must be carried on each channel Generally
not a huge payload, but it adds up over hundreds
of channels
STB has additional tuner at a set frequency to
capture utility information
29
Un-Mapped STBs
- Scans for Analog and QAM Carriers - In Band
Metadata - Varying results with utility
information - STB / Built-in ATSC Tuner
generally stores scan results
Self-Mapped STBs
- Each digital Pod carries in-band metadata
identifying itself and its content
- STB assigns the Pod to the RF frequency where
it was found by the scan
Echo 119W Tp 5
CATV Ch22
Echo 110W Tp 12
CATV Ch114
30
Digital Bulk Service?
X
Transaction File
TX
Encoder
ltEN crypt
DVR Storage
Decoder
DEgt crypt
31
IP Network
ENgt crypt
ltDE crypt
IP Multi-cast Enabled
ENgt crypt
Bandwidth, Bandwidth, Bandwidth
Edge Control
Encryption (How Many Flavors?)
32
Digital Bulk Service?
Selectable Outputs
Analog Hole
Encryption Keys
2nd IP Connection To PC
Program Guide Info
Virtual Channel Table
DVR Storage
Encrypted to the Point of Viewing
33
University IP Network IP Customer Premises
Equipment
34
University IP Network IP Customer Premises
Equipment
Personal Computer
Requirements Software Client Viewer, Variety
of Operating Systems Approved Encryption with
Digital Rights Management
Encryption Keys
Advantages No Set-Top-Boxes Essential for
Successful Bulk Program Client Owns the CPE
IP STB and PC Client Can Co-Exist Easy
Migration Path from Existing RF to IP No Major
Differences to Accommodate HDTV
IP Connection
2nd IP Connection To PC
Program Guide Info
Virtual Channel Table
Challenges Expense Technology and Business
Models not Well Baked
DVR Storage
- If Clear QAM is not an option to deliver
HDTV - and you do not want the capital and
management expense involved with the deployment
of Set-Top-Boxes - then IP to the PC client may
be the best available solution
35
Implications for the University Service Model
- Digital HDTV and Bulk Distribution need not
become mutually exclusive concepts - IP is
likely to break established program bundling
models
Burning Questions
- Where are the Digital STBs?
- Is Broadcast VSB (unencrypted digital) the
exception or the rule? - Will the Analog Hole
ever really be plugged?
Questions? Answers? Comments?