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Thread: DVB vs DVB-S2

  1. #1
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    Default DVB vs DVB-S2

    salutare..in viitorul apropiat cred ca va fii o problema ptr. detinatorii de Receivere DVB.vor trece toti TP importanti in DVB-S2 ? se va putea transforma un Receiver DVB in DVB-S2 ? defapt unde este deosebirea dintre DVB si DVB-S2 ?(unde e chichita in Tuner sau in Soft? thk
    2x NOKIA Dbox 2(AVIA 500+AVIA 600)Samsung DSR 9500 VIA CI ,DEXATEK DK-5701, ,Dish-1.0,LNB

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    Quote Originally Posted by shaq32_atak View Post
    salutare..in viitorul apropiat cred ca va fii o problema ptr. detinatorii de Receivere DVB.vor trece toti TP importanti in DVB-S2 ? se va putea transforma un Receiver DVB in DVB-S2 ? defapt unde este deosebirea dintre DVB si DVB-S2 ?(unde e chichita in Tuner sau in Soft? thk
    DVB-S2 foloseste un alt tip de modulatie a semnalului 8PSK fata de DVB-S acual care foloseste QPSK.Deci se foloseste un alt tip de tuner.

  3. #3
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    dupa cum a spus si SAFETRON1 este vorba de o alta metoda de modulatie a semnalului. Daca cu DVB-S se pot transmite aproximativ 7 canale pe un transponder cu DVB-S2 se pot transmite 10 canale, deci o imbunatatire cu aproximativ 30 %, ceea ce nu e de neglijat in cazul pachetelor de programe transmise de diferiti provaideri, sau in cazul transmisiilor HDTV care se stie ca ocupa o largime de banda mai mare decat cele SDTV...

    pe termen lung eu cred ca se va impune metoda DVB-S2

  4. #4
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    Cred ca or sa treaca toti in S2, asa cum s-a intamplat cu analogicul. Bine`nteles, va dura.

  5. #5
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    Si probabil ca vor renunta si la MPEG 2 in favoarea lui H.264/AVC.

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    Default O solutie interesanta ...

    Solutia ar putea fi CAM-ul celor de la Neotion care introdus in interfata sau in unele televizoare de la Sony care au o common interface ...converteste semnalul HD MPEG4-S2 in MPEG2 ...care se stie decoda fara probleme !

    "WISchip’s DeCypher8100 decoder uses three MIPS cores with a mixture of programmable elements and hardwired accelerator blocks for functions such as CABC, ME and DCT all linked via a 32bit bus switch. This can handle one HD channel up to 1080 progressive (1080p requires significantly higher performance decode than 1080i) and an SD channel for picture in picture, recording on a VCR or distribution around the home."

  7. #7
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    ...si sa vedeti atunci cum unele lnb-uri (majoritatea) nu o sa mai mearga din cauza zgomotului de faza prea mare ...

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    e un pas logic sa se treaca la norma de modulare DVB-S2 insotita de compresia MPEG-4 H.264/AVC...

    ramane de vazut in cat timp si la ce pret pentru utilizatorul final...

  9. #9
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    Default BRAVO mihaip (ai gasit repede solutia)mda..chiar o treaba intersanta

    [QUOTE=mihaip;322561]Solutia ar putea fi CAM-ul celor de la Neotion care introdus in interfata sau in unele televizoare de la Sony care au o common interface ...converteste semnalul HD MPEG4-S2 in MPEG2 ...care se stie decoda fara probleme !

    o solutie interesanta ptr a converti MPEG-2 in MPEG-4.The NEOTION Processor NP4 is the first fully optimized low cost MPEG-4-AVC single-chip solution that enables MPEG-4-AVC decoding, MPEG-4 to MPEG-2 high speed transcoding and native IP connectivity. The NP4 chip provides unrivalled security features, low consumption, unbeatable cost and high quality images. Manufacturers can take advantage of these benefits to easily convert MPEG-2 compatible products into MPEG-2 and MPEG-4 compatible products, regardless if it’s a digital TV decoder , an integrated digital TV (iDTV ie the European digital TV standard) or a Digital Cable Ready (DCR ie the American digital TV standard) TV. The native Internet connectivity also enables TV sets to access interactive services and video content.

    The processor NP4 is as well available through patented module and cartridge implementations. NEOTION is the world’s first company to develop Plug & Play MPEG-4 modules ( CAM , Ethernet, CPL, WIFI) for digital receivers, iDTVs or DCR TVs. NP4 also powers NP4 Cartridges inserted into digital set-top boxes. These solutions enable audiences to receive better quality sound and images, as well as an increased choice in the number of channels while addressing TV programmers’ priorities such as delivery costs, audience ratings and anti-piracy issues.

    avem si un video aici:
    http://www.neotion.com/products/processors.php
    si totusi ptr. Premiere 11914 H cum setam FEC-ul ca e 9/10 pe AUTO?
    2x NOKIA Dbox 2(AVIA 500+AVIA 600)Samsung DSR 9500 VIA CI ,DEXATEK DK-5701, ,Dish-1.0,LNB

  10. #10
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    Default 9/10

    Aici m-ai prins ...ma si asteptam la asta pentru un cititor atent ! FEC9/10 este oricum o magarie ... esti in footprint zona centrala ...OK ! nu ... pa SI PUSI !

  11. #11
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    Thumbs up ok

    Quote Originally Posted by mihaip View Post
    Aici m-ai prins ...ma si asteptam la asta pentru un cititor atent ! FEC9/10 este oricum o magarie ... esti in footprint zona centrala ...OK ! nu ... pa SI PUSI !
    ok.. am priceput,dar ai idee cum se va seta FEC 9/10? va schimbaCAM-ul ceva in meniu?care e procedura?thk
    2x NOKIA Dbox 2(AVIA 500+AVIA 600)Samsung DSR 9500 VIA CI ,DEXATEK DK-5701, ,Dish-1.0,LNB

  12. #12
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    Banuiesc ca o smecherie la soft va rezolva pb. 9/10

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    Quote Originally Posted by shaq32_atak View Post
    ok.. am priceput,dar ai idee cum se va seta FEC 9/10? va schimbaCAM-ul ceva in meniu?care e procedura?thk
    Probabil ca acest cam se va ocupa si de corectia erorilor , trimitand spre procesor semnal final MPEG 2 , iar procesorul se va ocupa doar de decompresie .....e doar o presupunere personala

 

 

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