Jump to content



Sign up for a free account to remove the pop-up ads

Signing up for an account is fast and free. As a member you can join in the conversation, enter contests and remove the pop-up ads that guests get. Click here to create your free account.

Photo
- - - - -

PCM-Bitstream??


  • You cannot start a new topic
  • Please log in to reply
4 replies to this topic

#1 of 5 OFFLINE   CoreyAC

CoreyAC

    Stunt Coordinator



  • 68 posts
  • Join Date: May 18 2006

Posted August 21 2007 - 07:45 AM

I switched DVD players last night and went into use my avia disk and when i was testing the surrounds it would play sound from both L and R speakers when it played them both? Also in the subwoofer check where it counts down in MHz's it wouldn't work? I ended up going into the dvd options and it says PCM...when i switched it to bitstream then tried it again, it worked... What is PCM...What is bitstream?? What's the difference and why did it mess my settings up? Anyone know?

#2 of 5 OFFLINE   hodedofome

hodedofome

    Stunt Coordinator



  • 236 posts
  • Join Date: Nov 21 2006

Posted August 21 2007 - 08:51 AM

On a DVD player PCM only sends 2 channel (left-right) info to your receiver, Bitstream sends 5.1 channels and then is decoded by your receiver to send sound to all speakers. I may have the specifics wrong as to what decodes what, but just remember PCM = 2 channel, Bitstream = 5.1 channel. You won't believe how many people think they're listening to surround sound on their new system until I go into the DVD player's settings and change it to Bitstream. I think by default it's set to PCM. On the new HD-DVD and Blu-Ray players they can send up to 7.1 channels in PCM over the HDMI cable to a receiver, but on normal DVD's it's just 2 channel.

#3 of 5 OFFLINE   WillG

WillG

    Producer



  • 5,237 posts
  • Join Date: Jan 30 2003

Posted August 21 2007 - 04:02 PM

I've got a question, I'm using PS3 for Blu-Ray. I set the output for the Optical output for Bitstream (I don't have an HDMI receiver) I set the audio for the BD that I am watching to 5.1 PCM. It does sound like I am getting discrete 5.1 but my Receiver display is only indicating two channels. Is it possible to be getting 5.1 channels on PCM while the display only indicates two?
STOP HIM! He's supposed to die!

#4 of 5 OFFLINE   FeisalK

FeisalK

    Screenwriter



  • 1,245 posts
  • Join Date: May 01 2003

Posted August 22 2007 - 03:38 AM

first of all its not possible to get 5.1 channels PCM from player to receiver without HDMI if your display indicates 2-ch PCM then your receiver is applying some processing (probably Dolby PLII) which makes it sound like 5.1 channels (PLII is very good at this) in your case its probably best to select DD or DTS in the movie so that you will get encoded 5.1ch audio through the optical connection
>
DVD-A registry for hirez/surround audio
Bluray, DVD-Audio, DAD/HDAD, DualDisc, MVI

#5 of 5 OFFLINE   CoreyAC

CoreyAC

    Stunt Coordinator



  • 68 posts
  • Join Date: May 18 2006

Posted August 23 2007 - 01:59 AM

Okay, sounds good...while i had it with pcm which wasn't showing dolby it was saying "prologic" but when it's playing correctly it will show "dolby digital" when i had it set for bitstream... whenever a disc has DTS i set it to that and the receiver will show "DTS" even when it was set at PCM.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users