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Deploying Digital Drivers , Architectures, and Considerations Mike Hochman 2008 CCTA Annual Meeting San Juan, PR. Outline. System architectures and drivers Simulcast Edge Expansion All-Digital Encoding architectures Constant bitrate (CBR) Variable bitrate (VBR) Ad insertion

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Deploying DigitalDrivers,Architectures,and ConsiderationsMike Hochman2008 CCTA Annual MeetingSan Juan, PR


Outline
Outline

  • System architectures and drivers

    • Simulcast

    • Edge Expansion

    • All-Digital

  • Encoding architectures

    • Constant bitrate (CBR)

    • Variable bitrate (VBR)

    • Ad insertion

    • Locally generated channels

  • Considerations for choosing the correct architecture and partner


Typical analog cable system
Typical analog cable system

450 – 550 MHz

60-80 channels

Analog “scrambling” & traps

No HD, VOD, etc.

Analog

receivers

Analog

modulators

Node

Fiber/HFC

Coaxial

Combiner

IRD

Receiver

Decoder


Digital simulcast
Digital Simulcast

  • Increase digital services

  • Enhance user experience

  • Maintain high quality

    • Discerning viewers

    • Large screen TVs


Digital simulcast1

Multiplexing &

Modulation

Encoders

Digital Simulcast

Piracy protection on digital channels

Digital video quality

Lower cost all-digital set top

Foundation for HD, VOD

~ $3,000 per channel

Analog

receivers

Analog

modulators

Node

Fiber/HFC

Coaxial

Combiner

IRD

Receiver

Decoder


Edge expansion

Multiplexing &

Modulation

Encoders

Analog

modulators

Edge QAM

Combiner

Decoders

Edge Expansion

Expanded plant bandwidth

Interactive applications

VOD

Switched Digital Video

~ $500 / channel / node

Analog

receivers

Node

Fiber/HFC

Coaxial

IRD

Receiver

Decoder


All digital

Multiplexing &

Modulation

Encoders

Decoders

All-Digital

All-digital network

Complete piracy protection

“Unlimited” bandwidth

$50 - $300 per set top box

Analog

receivers

Node

Fiber/HFC

Coaxial

Edge QAM

IRD

Receiver

Decoder


Architectures
Architectures

$

Simulcast

Analog & digital throughout the network

~ $3,000 per channel

Edge Expansion

Decoding and modulation at the edge

Additional ~$500 - $1000 per channel per node

All-digital

Complete piracy protection

Bandwidth for future growth

$$

$$$

Flexible platforms

enable seamless migration



Constant bit rate
Constant Bit Rate

  • Fixed transport bitrate

  • Fixed video bitrate

  • Fixed audio bitrate

  • Video quality varies dependent on content

  • Constant across program mix


All-CBR Architecture

Modulation

Encoding


Variable bit rate
Variable Bit Rate

  • Target bit rate range (min, max)

  • Target video quality

  • Bit rate changes to achieve target

  • Varies with time

  • Varies across program mix


Variable bit rate1
Variable Bit Rate

“Easy” content:

  • News channels

  • Cartoons

    “Difficult” content:

  • Sports action

  • Quick scene changes


Open-loop VBR

Encoding

Rate-Shaping

Modulation


Closed-loopVBR

Closed-loop

controller

Bit rate assignments

Complexity estimates

Modulation

Encoding


IP

IP

Distributed Closed-loop

Region 2

Closed-loop controller

Region 1

Modulation

Encoding


Cbr vbr open closed rate shaped

Closed-loop VBR

$$$$$$

16 ch. per QAM

Open-loop VBR

Rate-shaped

$$$

Rate-

shaper

14 ch. per QAM

Open-loop CBR

Rate-shaped

$$

Rate-

shaper

12 ch. per QAM

Open-loop CBR

Not rate-shaped

$

10-11 ch. per QAM

CBR, VBR, Open, Closed, Rate-shaped


Ad insertion
Ad Insertion

  • Maintain existing analog ad insertion system and encode after insertion

    • Low Cost

    • Harder to manage

    • Reduced video quality

  • Digital Program Insertion

    • Ads stay digital

    • Are usually CBR

    • Easier to manage

    • Higher video quality


Ad Splicing

SCTE 35

Encoder

Mux/Splicer

QAM

Ad stream

Network

Cue tones

DTMF, Contact Closure, or SCTE 104

SCTE 30

CATV Network

Ad Server


Locally generated content
Locally Generated Content

  • If you wish to deploy all-digital set-tops, EVERYTHING must be digital

    • MDU in-house channels

    • Hotels

    • Hospitals

    • Stadiums


Locally generated content1

Community Cameras

Encoding, Multiplexing, Modulation and Up Conversion

Locally Generated Content

Analog receivers

Analog Fiber Node

Ad Servers

Without digital set top

Edge Decoding

Groomer/Mux

Optical IP transport

Off-air

ENCORE Encoders

Splicer/Mux

Modulation

QUARTET Encoders

With digital set top

Digital Fiber Node

Digital receivers

Community Cameras

MDU encoding, multiplexing, modulation and up conversion


Criteria for partner selection
Criteria for partner selection

  • Video quality

  • Channels per QAM

  • Ease of deployment and maintenance

  • Cost

  • Digital ad-insertion

  • Upgradeability, flexibility

  • Work with partners that have experience, and proven success interoperating with each other



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