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Lossy Coding

Member’s Name

Usaid Syawahidul Chaq 5113100089

Muhammad hulam !a"ri 511310009#

$ani% Sudira 511310018#

Mul&imedia Ne&wor'

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(e)ni&ion*ha& is Lossy Com+ression,

-n in%orma&ion &e.hnology/ lossy .om+ression is &he .lass o% da&a en.oding me&hods

&ha& uses inea.& a++roima&ions or +ar&ial da&a dis.arding &o re+resen& &he .on&en&

 2hese &e.hniques are used &o redu.ed da&a sie %or s&orage/ handling/ and

&ransmi&&ing .on&en&

1 46 4674oin& ho&ogra+hi. 6+er&s rou+ is a .ommonly used me&hod o% lossy

.om+ression %or digi&al images/ +ar&i.ularly %or &hose images +rodu.ed by

digi&al +ho&ogra+hy 2he degree o% .om+ression .an be ad"us&ed/ allowing a

sele.&able &radeo be&ween s&orage sie and image quali&y 46 &y+i.ally

a.hie:es 10;1 .om+ression wi&h li&&le +er.e+&ible loss in image quali&y

6i% is &hemos& .ommon image %orma& used by digi&al .ameras and o&her +ho&ogra+hi.

image .a+&ure de:i.es? along wi&h 46>4!-!/ i& is &he mos& .ommon %orma& %or

s&oring and &ransmi&&ing +ho&ogra+hi. images on &he *orld *ide *eb

"+eg/

e.e+& in older -n&erne& 6+lorer :ersions/ whi.h +ro:ides a M-M6 &y+e o% 

image>+"+eg when u+loading 46 images4!-! su++or&s a maimum image sie o% B5535B5535 +iels/

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degrees o% granulari&y -& is +ossible &o s&ore dieren& +ar&s o% &he same

+i.&ure using dieren& quali&y3 *eb

*eb is a new image %orma& &ha& +ro:ides lossless and lossy .om+ression %or

images on &he web *eb lossless images are ABH smaller in sie .om+ared

&o Ns *eb lossy images are A5D3#H smaller in sie .om+ared &o 46

images a& equi:alen& SS-M inde *eb su++or&s lossless &rans+aren.y 7also

'nown as al+ha .hannel wi&h "us& AAH addi&ional by&es 2rans+aren.y is also

su++or&ed wi&h lossy .om+ression and &y+i.ally +ro:ides 3 smaller )le sies

.om+ared &o N when lossy .om+ression is a..e+&able %or &he

red>green>blue .olor .hannels# CM

ulseD.ode modula&ion 7CM is a me&hod used &o digi&ally re+resen& sam+led

analog signals -& is &he s&andard %orm o% digi&al audio in .om+u&ers/ Com+a.&

(is.s/ digi&al &ele+hony and o&her digi&al audio a++li.a&ions -n a CM s&ream/

&he am+li&ude o% &he analog signal is sam+led regularly a& uni%orm in&er:als/

and ea.h sam+le is quan&ied &o &he neares& :alue wi&hin a range o% digi&al

s&e+s5 LCM

Linear +ulseD.ode modula&ion 7LCM is a s+e.i). &y+e o% CM where &he

quan&ia&ion le:els are linearly uni%orm