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Compro Video Mate TV Gold Plus II - slikom na sliku
01.10.2005.
    « Prev  : Stranica 2 od 5 :  Next »      By ::  Igor Vujević 
- Tehničke specifikacije -

Tehnički podaci:
  • PAL BG
  • Philips SAA7134 chip
  • FM stereo
  • Internal AUX-Out audio
  • FM i antenski ulazi
  • Audio i video izlazi

Back plate kartice je zlatne boje s vrlo kvalitetnim konektorima, redom: FM antena, koaksijalni antenski priljučak, IR priključak, audio ulaz, audio izlaz, S-video ulaz, kompozitni video ulaz. Zvuk je moguće priključiti na dva načina, direktno na matičnu ploču pomoću priloženog internog audio patch kabela ili na "line in" ulaz na zvučnoj kartici preko vanjskog audio patch kabela. Za radio prijem zadužena je priložena antena koja se jednostavno priključi u odgovarajući ulaz i prikladno raširi za bolji prijem. Video signal je do kartice mogući dovesti na dva načina - antenskim ili kabelskim priključkom direktno na antenski ulaz na tuneru ili preko S-video/kompozitnog video konektora s vašeg klasičnog TV prijemnika. Naravno, za iskorištavanje punog potencijala ove kartice prvi način je "way to go".

 

Mastermind cijele priče

Na ovoj se kartici Compro odlučio za implementaciju Phillips FM1236 TV i radio tunera, a za dekodiranje audio i video signala zadužen je čip iz iste kompanije - Philips SAA7134HL. Philipsov SAA7134HL je "single chip" rješenje zaduženo za prihvat analognog video i audio signala te za njihovu pretvorbu u digitalni, s implementiranim dodacima za sinkronizaciju zvuka i slike. Čip nudi analogni audio pass-through zadužen za loop back na zvučnu karticu, kao i prihvat DTV i DVB streamova, kao što su VSB, OFDM i QAM standardi emitiranja televizijskog programa. Analogni video signal sempliran je preko 9-bitnog ADC-a (Analog Digital Converter), dekodiran s multi-line comb filtrima i skaliran horizontalno, vertikalno i "By field". Podržani su izlazni video signali u dva formata - YUV i RGB, s dodacima za poboljšanje slike (gamma kompenzacija i black-strech). Audio signal se pretvara u digitalni stereo izlaz (NICAM i dual FM standardi) i kao takav prolazi direktno preko PCI sabirnice ili se u sirovom analognom formatu isporučuje preko loop-back kabela na zvučnu karticu u računalu.

Shematski prikaz Philips SAA7134 chipa

Osim ovih karakteristika, ovaj je čip opremljen i s univerzalnim sučeljem za podršku sistemskim ekstenzijama koje mogu implementirati razni proizvođači koji na njemu temelje svoje proizvode. Compro je ovo iskoristio, u prvom redu, za podršku MPEG enkodiranju s time shift mogućnostima, kao i za implementaciju DSP aplikacija za poboljšanje audio signala. Sukladno ovim informacijama možemo izdvojiti glavne karakteristike ovoga tunera, kao i napomenuti da je njihova integracija s glavnim čipom izvedena vrlo impresivno:

  • Prijem TV i FM signala na računalo
  • Power Up Scheduling
  • Remote Power On/Of
  • MPEG-1/2/4 snimanje
  • Straight-to-Disc snimanje
  • High-Quality daljinski upravljač
  • Picture Purifying tehnologija


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