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Ann pran yon gade nan sitiyasyon an IPTV ki gen rapò an premye:
1. Sitiyasyon aktyèl mache TPTV
a) Kòm nan mwa fevriye ane sa a, kantite total itilizatè IPTV nan tout peyi a te rive nan 36.302 milyon, ak kantite itilizatè entènèt mobil nan peyi mwen an se pre 900 milyon. Aksè chak mwa a per capita se prèske 300M, 8M bande se mwatye, ak fib optik se prèske 40%.
clip_image001
Figi 1 Tranzisyon an jeneral televizyon dijital nan peyi mwen an
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Figi 2 Echèl itilizatè televizyon dijital yo ak degre nimerizasyon kab nan chak pwovens
b) Pèfòmans ekonomik endistri kominikasyon yo nan mwa Mas ane sa a te montre ke biznis telekominikasyon total twa konpayi telekominikasyon debaz yo te konplete 18.01 milya dola Yuan, yon ogmantasyon ane 22.7%, ki se 7.7 pwen pousantaj pi wo pase menm peryòd;
prensipal bwat televizyon IPTV set-top yo kounye a sou mache a nan Lachin gen ladan yo: [SD]: Huawei, ZTE, Changhong, UT, MOTO, Fiberhome, Da Ya, Tongzhou, Jiulian, Bell, Skyworth, Chaoge, Dahua, ak Shuyuan . [HD]: Huawei, ZTE, MOTO, Daya, Chaoge, Fiberhome, Cozhou, Hisense, Skyworth, Kaitian, UT, Changhong, Bell, Feiyue, Jiulian, Shuyuan.
Li ka wè nan pi wo a ke kondisyon yo pou IPTV ap vin pi wo ak pi wo nan tan kap vini an. Lè optimize EPG devan-fen a, youn dwe konsidere kapasite pou pote sèvè a, epi dezyèm, yo dwe konsidere pèfòmans ak konpatibilite bwat set-top la.
[Preparasyon]: Lè ou konsidere patikilye a nan anviwònman an, ou bezwen fè preparasyon sa yo: Materyèl: PC, mete-tèt bwat, mwaye rezo (ki se, HUB, ou ka tou itilize switch la ak mirwar fonksyon). Lojisyèl: Chrome, Wireshark. Si pa gen okenn anviwònman aleka, tout bagay sa yo bezwen itilize. Si gen yon anviwònman debogaj aleka, HUB ak Wireshark yo pa bezwen.
Diminye kantite demann: Anjeneral, li pi bon pou mande mwens pase 5 demann pou yon paj. Lè kantite demann rive nan plis pase 10, vitès la evidamman pi dousman. Ki jan diminye kantite demann?
1. Diminye kantite foto ak entegre foto miltip ansanm, chak foto se yon demann.
2. Pa dwe gen okenn resous ki pa ka mande, se sa ki, pa dwe gen okenn resous HTTP 404.
3. Diminye kantite demann iframe yo.
4. Diminye demann AJAX.
5. Lazy chaje nan resous asenkron nan AJAX.
6. Konbine JavaScript ak CSS.
JS kòd
1. Eseye pa sèvi ak JQuery, pifò bwat mete-tèt pa sipòte li.
2. Konbine epi minimize JAVASCRIPT.
3. Afiche ti js nan paj la.
4. Peye atansyon sou konpatibilite nan bwat la mete-tèt bouton sa yo. Anjeneral, definisyon estanda sèlman sipòte onkeypress, e pifò pa sipòte onkeydown. Si ou eseye sèvi ak li, bwat la mete-tèt pral friz. Si toude kalite kle yo sipòte, JS ka jije kle a pou egzekite kle a yon sèl fwa.
5. Eseye itilize AJAX a JWENN asenkron demann epi sèvi ak mwens demann POST.
6. Eseye itilize pou olye pou yo chak.
7. Sèvi ak eval tankou ti ke posib.
8. Eseye itilize getElementById pou jwenn aksè, pa sèvi ak getElementsByName, getElementsByClassName, getElementsByTagName, pifò bwat set-top yo pa konpatib ak metòd sa yo.
9. Eseye sèvi ak metòd la rantre nan ankonbre karaktè, ak mwens itilize fonksyon an concat, oswa operatè tankou + =.
10. Lè reyekri evènman sistèm, eseye retounen fo oswa 0, oswa nil otank posib, tankou frap sistèm ak evènman lèktur.
11. Ekstrè js la pataje epi mete li deyò pou lòt paj yo rele.
foto:
1. Sèvi ak png pou imaj transparan otank posib epi sèvi ak gif mwens.
2. Konprese jpg epi efase enfòmasyon ki pa nesesè nan jpg.
3. src la nan img pa ka kite vid, paske gen kèk bwat mete-tèt pral fè demann adisyonèl, se pou kont li mete yon valè ki pa-inexistant.
4. Pa rale gwosè foto a sou fen devan EPG a, foto a ka fèt selon gwosè aktyèl la, se sa ki, eseye pa gen lajè ak wotè atribi nan tag img.
5. Lazy chaje nan foto, se pa tout foto yo prezante imedyatman, foto yo ka parèt sou demann.
CSS
1. Evite CSS @import. Pifò bwat set-top pa sipòte @import, epi yo ta dwe itilize lyen.
2. Afiche ti CSS nan paj la.
3. Mete ladan l ak minimize CSS.
4. Konprese CSS la.
5. Debarase m de CSS nesesè.
JavaScript
1. Sèvi ak document.write tankou ti ke posib.
2. Reta chaje nan JavaScript.
3. Ajiste lòd la JS epi mete sa yo itilize nan onload dèyè dosye a html otank posib.
4. Konprese JS.
5. Evènman pa ka itilize kòm yon non fonksyon.
Java
1. Enfim sesyon, lè sesyon pa nesesè <% @ paj sesyon = "fo"%>.
2. Eseye itilize <% @ include file = "xxx.jsp"%> ak mwens itilize .
3. Eseye itilize Java pou jwenn paramèt URL, JS ap resevwa se relativman anbarasman ak ralanti.
Sèt, pa ka optimize nan fen devan an:
1. Lè w ap fè yon demann asenkron, lè header repons sèvè a se 204, ni iframe ni ajax pa ka rezoud pwoblèm lan, epi ka gen demann repete, men ajax ka fè pi byen.
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Antre nan imèl yo ka resevwa yon sipriz
es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org -> Afriken
sq.fmuser.org -> Albanyen
ar.fmuser.org -> Arab
hy.fmuser.org -> Armenian
az.fmuser.org -> Azerbaydjan
eu.fmuser.org -> Basque
be.fmuser.org -> Belarisyen
bg.fmuser.org -> Bulgarian
ca.fmuser.org -> Katalan
zh-CN.fmuser.org -> Chinwa (senplifye)
zh-TW.fmuser.org -> Chinwa (Tradisyonèl)
hr.fmuser.org -> Kwoasyen
cs.fmuser.org -> Czech
da.fmuser.org -> Danwa
nl.fmuser.org -> Olandè
et.fmuser.org -> Estonyen
tl.fmuser.org -> Filipino
fi.fmuser.org -> Finnish
fr.fmuser.org -> Franse
gl.fmuser.org -> Galisyen
ka.fmuser.org -> Georgian
de.fmuser.org -> Alman
el.fmuser.org -> Greek
ht.fmuser.org -> Kreyòl ayisyen
iw.fmuser.org -> ebre
hi.fmuser.org -> Hindi
hu.fmuser.org -> Hungarian
is.fmuser.org -> Icelandic
id.fmuser.org -> Endonezyen
ga.fmuser.org -> Ilandè
it.fmuser.org -> Italyen
ja.fmuser.org -> Japonè
ko.fmuser.org -> Koreyen
lv.fmuser.org -> Latvian
lt.fmuser.org -> Lithuanian
mk.fmuser.org -> Masedwan
ms.fmuser.org -> Malay
mt.fmuser.org -> Maltese
no.fmuser.org -> Norwegian
fa.fmuser.org -> Pèsik
pl.fmuser.org -> Polonè
pt.fmuser.org -> Pòtigè
ro.fmuser.org -> Romanian
ru.fmuser.org -> Ris
sr.fmuser.org -> Sèb
sk.fmuser.org -> Slovak
sl.fmuser.org -> Slovenian
es.fmuser.org -> Panyòl
sw.fmuser.org -> Swahili
sv.fmuser.org -> Syèd
th.fmuser.org -> Thai
tr.fmuser.org -> Tik
uk.fmuser.org -> Ikrenyen
ur.fmuser.org -> Oudou
vi.fmuser.org -> Vietnamese
cy.fmuser.org -> Welsh
yi.fmuser.org -> Yiddish
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