an efficient hot channel identification scheme for iptv

8/10/2019 An Efficient Hot Channel Identification Scheme for Iptv

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AN EFFICIENT HOT CHANNELIDENTIFICATION SCHEME FORIPTV CHANNEL NAVIGATION

E unji Lee,Jung Youn Ku and Hyokung Bahn

DEEPTHI ANN JACOB1ST M TECH


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CONTENTS

IntroductionSeparate hot and cold channel lists I dentification of hot channels

Prefetching hot channels

Prototype i ple entation and e!peri ents"elated #or$ Conclusion


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Introduction o% IPT& ' li itation due to (and#idth li itation' )appin* delay+ strands o% research addressin* this pro(le

popularity-based arrangement adjacent channel prefetching

Pro(le occurs #hile see$in* %or less popular

channel Ne# sche e introduction, +list sche e Preview mode with low resolution prefetched

INTRODUCTION


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Co parison #ith Adjacency based prefetching (3 !" Popularity-based prefetching(3#!" Popularity-based arrangement($%!"&imple numerical ordering(' !"


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CONTENTS

Introduction

Separate hot and cold channel lists Identification of hot channels Prefetching hot channels

Prototype i ple entation and e!peri ents"elated #or$ Conclusion


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IDENTIFICATION OF HOT CHANNELS Identi%ies (y tar*et -ie#er.s history o% channel

selection' past (eha-ior in #atchin* %re/uency

and recency' identi%ies the channel *ettin* hotter'colder etc

Predicted popularity -alue associated #ith channel i

#hich deter ines the popularity

SEPARATE HOT AND COLD CHANNELLISTS


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)i the viewing rate of channel i across all viewers

*i the time-weighted fre+uency with which channel ihas been#atched (y the tar*et -ie#er0 Each -ie# o% the pastcontri(utes to *i


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the contribution of a view is deter ined (y a #ei*hin*%unction ,( ". where is the elapsed ti e since the -ie#0

or e!a ple' i% channel i was #atched at t%. t/. and t3. *i at current time tc can be e pressed as

*i 0 ,( 1 12 3 ,( 1 +2 3 ,( 1 42'516tc,t1 and so on

,( " 0 (%2/" (4 "#here 782 is a constant that satis%ies 9 : 8: 1


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Si ilar techni/ue used in DT& channel selection (ased on-ie#er.s -ie#in* historyProperty1

Pi and Pi; (e the predicted popularity -alue o% channel i at then,th and the 7n312,th -ie#in* ti e'

Pi ! Pi F"#$ % &i , #here delta is the ti e inter-al (et#een the n,th and the

7n312,th -ie#in* ti e0Proof.


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Property 2:I% Pi = P> %or any channels i and > at t' and neither i nor > ha-e (een -ie#ed a%ter t' then Pi; = P>; holds %or

any t? #here 7t; =t20

i0e0 property + sho#s that relati-e orderin* o% channel in priority list does not chan*e i% they are not -ie#ed

a*ainDecidin* #hether a should (e $ept in hot list or coldlist


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P&EFETCHIN' HOT CHANNELS


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Ad(an)age* o+ *e a-a)ing )he .hanne/* in)o )0o /i*) See$ distance 7the no0 o% channels (ypassed on the #ay to re/uired

channel 2 is lessE!pected see$ distance can (e reduced

+uic5 switch from cold channel to hot is possible

To /uanti%y the see$ ti eo% t#o,list sche eEST= k=1 Z hot P hot ( k) + Z cold (1- P hot (k))Limit k=1 to n

6 hot 6 cold )ap delays

P hot Probability that current channel 5 is in hot list7


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CONTENTS

IntroductionSeparate hot and cold channel lists

Identification of hot channels Prefetching hot channels

Prototype i ple entation and e!peri ents

"elated #or$ Conclusion


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PROTOTYPE IMPLEMENTATION ANDE PERIMENTS


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Architecture helped in the de-elop ent o% an so%t#aree ulator de-eloped %or STBPopularity o% channel odeled (y @ip% distri(ution

@ip% para eter is 79:6 :612hen its 9 all channels are e/ually popular

Increases #ith increasin* popularity


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total see$ ti e o% sche es as channel no0 increasesT#o,list sche e outper%or s the other (y reducin* a-*see$ ti e (y 4 F' 4GF' 1F' F0

I

Pro-ide pre-ie# o% channel reduce )appin* ti e0 A-*total see$ ti e is 41F less than popularity K(ased and

4LF si ple nu erical orderin*


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CONTENTS






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CONTENTS






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Ne# sche e o% identi%yin* hot or cold channels %rorecent -ie#in* data %or all -ie#ers and also tar*et-ie#er.s -ie#in* history

Separate list and %ast pre-ie# ode

See$ ti e is less co parin* #ith all other sche es

CONCLUSION


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Thank you


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Questions??

an efficient hot channel identification scheme for iptv

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