Cable TV Analog Teeb Liab
Cable TV Analog Teeb Meem(Cov tsoos 'kav hlau txais xov') yog cov qauv teeb tsa ntawm lub TV hauv qab txias thaum ntxov. Qhov tseem ceeb, nws ncaj qha 'nqa' TV cov kev pab cuam (duab thiab suab paj nruag) ntawm cov cim hluav taws xob hloov hluav taws xob thiab xa mus rau cov neeg siv lub cibe.
Cov Nta Tseem Ceeb:
1. Tsis muaj teeb {- lub thawv sab saum toj; Qub CT TVs tuaj yeem saib xyuas ncaj qha ntsaws hauv cov coaxial cable, nrog 'ntsaws thiab ua si'
2. Lub cim txuas ntxiv mus ntxiv, thiab cov kev hloov pauv hauv cov duab thiab suab yog 'du'; Piv txwv li, kev hloov pauv hauv cov kev nqis tes ua thiab cov qib muaj suab tsis muaj 'joney heav';
3.Qhov tsuas yog ob peb txoj cai, feem ntau yog kaum, daim duab zoo tau cuam tshuam nrog kev laus, koj tuaj yeem tuaj yeem thov kev sib tham nyob rau, thiab tsis tuaj yeem thov rau ntawm- Thov lossis Rewatch.
Cable TV digital teeb liab
Cable TV digital teeb liab(Tam sim no mainstream 'txheej - lub thawv sab saum toj' '} teeb liab) yog hom teeb liab hom rau cable TV hnub no. Qhov tseem ceeb, nws cov kev pab cuam hauv TV (cov duab, suab paj nruag) rau hauv ib '0/1 Binary Binary', complav nws, thiab xa nws dhau cov cable. Cov neeg siv yuav tsum tau siv 'txheej {- lub thawv saum toj kawg nkaus' kom txiav txim siab nws kom saib.
Cov Nta Tseem Ceeb:
1. Lub teeb {- lub thawv sab saum toj; Lub teeb liab yog 'encrypted discrete cov ntaub ntawv' uas yuav tsum tau txiav txim siab thiab txiav txim siab los ntawm lub teeb- lub thawv sab saum toj los tso duab / suab hauv TV;
2. Lub teeb liab yog discitt, nrog cov duab thiab suab tawg rau hauv 'cov ntaub ntawv thaiv' rau kev sib faib, 1 daim vis dis aus tau muab faib ua 25 thav duab (txhua pawg yog ib pawg ntawm cov ntaub ntawv binary);
3. Txhim Kho Cov Kev Kawm, feem ntau ntawm cov channel (feem ntau, suav nrog kev cuam tshuam HD
| Catv Analog Teeb Liab | Catv digital teeb liab | |
|---|---|---|
| Tau Txais Cov Ntaus | Tsis muaj teeb tsa -} txuas sab saum toj lub thawv yuav tsum tau, ncaj qha rau TV (cov TVs qub los nrog cov paib ntsuas teeb liab). | Yuav tsum muaj ib txheej {{0} {{{{1} -} hauv cov qauv decoding module. |
| Tus naj npawb ntawm cov channel |
30-50 channel, tsuas yog qhov yooj yim |
100-500 poob lawm, suav nrog HD thiab kev tshaj lij raws li kev ua si thiab cov yeeb yaj kiab raws |
| Daim duab zoo / Suab Zoo | Kev cuam tshuam rau kev cuam tshuam (Daus, dab, suab nrov), kev daws teeb meem tsawg (zoo li 480p). | Tsis muaj kev cuam tshuam (ntshiab thiab ruaj khov), txhawb nqa HD (1080p), 4K, thiab suab paj nruag suab zoo. |
| Sib tham sib nta |
Tsis muaj (Tsuas yog saib cov kev tshaj tawm nyob hauv tsev, tsis muaj kev nrawm nrawm los yog rewind). |
playback, ncua, kev kawm teem sijhawm, txawm tias kev twv txiaj / khw |
| Kev Sib Kis Kev Sib Kis |
Qi (1 cable tsuas tuaj yeem hloov 1 teeb ntawm analog raws, cov khoom siv khib nyiab). |
Siab (Los ntawm 'lub teeb liab compression', ib qho cable tuaj yeem xa cov dozens ntawm cov ntawv digital). |
| Anti - sib cuam tshuam muaj kev cuam tshuam |
Qaug (Cable kev laus thiab sab nraud hluav taws xob hluav taws xob sib cuam tshuam ncaj qha rau cov duab). |
Muaj zog (Kev cuam tshuam tsis cuam tshuam tsis cuam tshuam rau kev txiav txim ntawm 0/1, tsuas yog yuav ua rau nws tab sis khoo). |
Teeb liab hloov dua siab tshiab hauv cable TV
Lub teeb liab hloov dua siab tshiab hauv Catv tsis yog "ib kauj ruam," tab sis theej qhov tseem ceeb txais kev pab cuam los ntawm "Digource Kev Tshaj Tawm thiab ntawm" digital rau analog "ntawm tus neeg siv kawg.
Kauj ruam 1:
Hauv TV chaw nres tsheb (analog teeb liab → digital teeb liab) {{{{} Cov duab kos npe rau hauv cov duab xov xwm (xws li cov xov xwm txuas ntxiv mus rau hauv cov cim digital rau kev sib kis digital.
1. A / D hloov dua siab tshiab: siv cov khoom siv tshaj lij (xws li "cov qauv sib tham ua ntej)
2. Compression encoding: lub cim ntsuas digital loj, xav tau kev siv cov qauv txheem "hauv cov duab, xws li kev siv cov haiv neeg) kom txo qis kev xa khoom;
3. Encryption thiab multiplexing: ntau cov pawg ntawm compressed digital raws li cov neeg xa khoom (los ua kom tsis txhob kis tau)
Kauj ruam 2:
Tus Neeg Siv Sab (digital teeb liab → analog / digital teeb liab) {{} yuav tsum tau hloov dua tshiab "
1. Decryption thiab DemultipleXing: Lub teeb - Lub thawv ntawv sab saum toj no los ntawm "ntim cov channel xav tau ntawm" ntim ntau cov channels "(demultipleXing);
2. Digital - rau {{2} {{{{{{{{{ rau saib ncaj qha;
3. Kev tso tawm ncaj qha ntawm daim paib digital: Yog tias tus neeg siv muaj lub cim digital (nrog rau HDMI Cable tuaj yeem tso cov duab siab ncaj qha (hla lub d / ib ruam).
