FMUSER Wirless Transmit Video And Audio More Easier !

[email protected] WhatsApp +8618078869184
Language

    DVB-C video is transmitted in SPI interface and ASI interface

     

       There is video of two kinds of MPEG2 in the transmission interface of current DVB-C system equipment code shedding transmits interface standard: Asynchronous is serial interface ASI and SPI of synchronous and collateral interface.
       SPI altogether has 11 useful signal, every signal poor cent is used into two signal raise transmission interference rejection quality, transmit with DB25 on physical link, because this connects a line much and complex, transmission distance is short, appear easily breakdown. But SPI is collateral 11 signal, processing is simple and expansibility is strong, the input of the output of because this is current general MPEG2 video coder and video decoder is SPI interface signal of the standard.
       ASI is used serial transmit, need a coaxial cable to transmit only, connect a line simple, transmission distance is long. According to the actor defect with SPI and respective ASI, often want to have the mutual transition of SPI and ASI interface when transmission signal.
    1, SPI signal structure
       SPI of collateral transmission system includes signal of signal of a clock, 8 data signal, a frame synchronization and a data effective signal. The synchronous byte 047H that TS of correspondence of frame synchronization signal wraps, effective signal uses data the length that divisional TS includes is 188 byte or 204 byte. When TS bag grows 188 byte, effective signal is data all the time tall n, at the same time all signal keep synchronous with clock signal.
    2, ASI interface
       ASI is transmitted stream can have different data rate, but transmission rate is constant, for 270Mbps, because this ASI is OK,be sent and receive the MPEG2 data of different rate. ASI transmission system is statified structure. ISO/IEC 13818 of standard of the 2nd top layer, use MPEG2 - 1 (SYSTEM) , the 0th mixes the 1st is the FC fiber channel that is based on 1SO/IEC CD 14165-1. FC supports a variety of physics to transmit agency, if coaxial cable is transmitted,wait.
       The 8bit that will include synchronous MPEG2 deferent package above all piles up a word to be changed into 10bit to pile up a word; Be in then and / when stringing together changeover, input a new word when the requirement, and when data source has not gotten ready, should insert a K the synchronous word of 28.5, transmit rate in order to achieve the fixed 270Mbps of ASI. Forms serial bit flows will pass amortize / drive circuit and coupling network, send to coaxial cable connector. Should arrive at sink through coaxial cable, in receive when receiving data, want to pass connector and coupling network above all, coupling arrives on the circuit that restores clock and data, undertake stringing together next / alternate; To restore byte synchronism, ASI decoder must seek K28.5 synchronous word first, once search this synchronism word, it is the data demarcate that receives subsequently namely attrib border, built decoder to output the correct byte of byte to arrange thereby; Undertake 10/8bit alternates finally, the MPEG2 TS code that restores synchronism giving a package sheds data. But K28.5 synchronous word is not available data, because must be deleted when this decipher.

     

     

     

     

    List all Question

    Nickname

    Email

    Questions

    Our other product:

    Professional FM Radio Station Equipment Package

     



     

    Hotel IPTV Solution

     


      Enter email  to get a surprise

      fmuser.org

      es.fmuser.org
      it.fmuser.org
      fr.fmuser.org
      de.fmuser.org
      af.fmuser.org ->Afrikaans
      sq.fmuser.org ->Albanian
      ar.fmuser.org ->Arabic
      hy.fmuser.org ->Armenian
      az.fmuser.org ->Azerbaijani
      eu.fmuser.org ->Basque
      be.fmuser.org ->Belarusian
      bg.fmuser.org ->Bulgarian
      ca.fmuser.org ->Catalan
      zh-CN.fmuser.org ->Chinese (Simplified)
      zh-TW.fmuser.org ->Chinese (Traditional)
      hr.fmuser.org ->Croatian
      cs.fmuser.org ->Czech
      da.fmuser.org ->Danish
      nl.fmuser.org ->Dutch
      et.fmuser.org ->Estonian
      tl.fmuser.org ->Filipino
      fi.fmuser.org ->Finnish
      fr.fmuser.org ->French
      gl.fmuser.org ->Galician
      ka.fmuser.org ->Georgian
      de.fmuser.org ->German
      el.fmuser.org ->Greek
      ht.fmuser.org ->Haitian Creole
      iw.fmuser.org ->Hebrew
      hi.fmuser.org ->Hindi
      hu.fmuser.org ->Hungarian
      is.fmuser.org ->Icelandic
      id.fmuser.org ->Indonesian
      ga.fmuser.org ->Irish
      it.fmuser.org ->Italian
      ja.fmuser.org ->Japanese
      ko.fmuser.org ->Korean
      lv.fmuser.org ->Latvian
      lt.fmuser.org ->Lithuanian
      mk.fmuser.org ->Macedonian
      ms.fmuser.org ->Malay
      mt.fmuser.org ->Maltese
      no.fmuser.org ->Norwegian
      fa.fmuser.org ->Persian
      pl.fmuser.org ->Polish
      pt.fmuser.org ->Portuguese
      ro.fmuser.org ->Romanian
      ru.fmuser.org ->Russian
      sr.fmuser.org ->Serbian
      sk.fmuser.org ->Slovak
      sl.fmuser.org ->Slovenian
      es.fmuser.org ->Spanish
      sw.fmuser.org ->Swahili
      sv.fmuser.org ->Swedish
      th.fmuser.org ->Thai
      tr.fmuser.org ->Turkish
      uk.fmuser.org ->Ukrainian
      ur.fmuser.org ->Urdu
      vi.fmuser.org ->Vietnamese
      cy.fmuser.org ->Welsh
      yi.fmuser.org ->Yiddish

       
  •  

    FMUSER Wirless Transmit Video And Audio More Easier !

  • Contact

    Address:
    No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China 510620

    E-mail:
    [email protected]

    Tel / WhatApps:
    +8618078869184

  • Categories

  • Newsletter

    FIRST OR FULL NAME

    E-mail

  • paypal solution  Western UnionBank OF China
    E-mail:[email protected]   WhatsApp:+8618078869184   Skype:sky198710021 Chat with me
    Copyright 2006-2020 Powered By www.fmuser.org

    Contact Us