Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > General > Audio encoding

Reply
 
Thread Tools Search this Thread Display Modes
Old 22nd July 2008, 10:33   #1  |  Link
jonathonsunshine
Registered User
 
Join Date: Sep 2005
Posts: 87
clipping/static/distortion in Surcode encoded DTS audio

Howdy all.

I have encoded some DTS audio via following method

1) Use Eac3to to output 6 mono wavs from the 5.1 LPCM track of a blu-ray.
2) Encode the 6 wavs to DTS using Surcode 1.0.21
3) Run the DTS through Eac3to "remove the zero padding" (I don't know what this Zero Padding is, but i know that until i remove it, the DTS track plays slightly slower than it is supposed to.)

Ok, so I was listening to it, and I can here this occasional static/popping, as if I had my speakers cranked up to to loud. Except they wern't up terribly, and I have really good brand new speakers (Logitech z5500). So I played some other stuff, with original untouched audio, Die Hard 4 with original DTS and Rambo 4 with original Dolby, and I didn't notice it.

Unfortunatly, I don't have access to the original sources.

So my question is, is Surcode like... crappy or something ? The person who 1st clued me into the Zero Padding thing and how to fix the sync issues, referred to Surcode as being a "Dirty Encoder"...

Last edited by jonathonsunshine; 22nd July 2008 at 11:15.
jonathonsunshine is offline   Reply With Quote
Old 3rd August 2008, 10:35   #2  |  Link
jonathonsunshine
Registered User
 
Join Date: Sep 2005
Posts: 87
i got my hands on the source files again, seems that the clipping issues are actually in the source files. so that effectivly brings this issue to a close.
jonathonsunshine is offline   Reply With Quote
Old 3rd August 2008, 21:40   #3  |  Link
specise_8472
Newbie
 
specise_8472's Avatar
 
Join Date: Oct 2002
Location: New Zealand
Posts: 176
Quote:
Originally Posted by jonathonsunshine View Post
3) Run the DTS through Eac3to "remove the zero padding" (I don't know what this Zero Padding is, but i know that until i remove it, the DTS track plays slightly slower than it is supposed to.)
In Surcode save the file as a .CPT which is the Compact Non Zero Padded DTS. Then just rename file to .DTS. Quicker than trusting another program to edit the file.
EDIT: Just a quick aside..DTS recommend using .CPT, especially if using Maestro to author DVD's.
specise_8472 is offline   Reply With Quote
Old 4th August 2008, 01:42   #4  |  Link
EPiPH0NE
b4k3d
 
Join Date: Sep 2007
Posts: 310
Why not just do:

eac3to input.lpcm output.dts

I did that for quite a while w/o any issues or 'dirtiness'. I would also suggest stepping up to Surcode 1.0.23 and then try again.
EPiPH0NE is offline   Reply With Quote
Old 4th August 2008, 15:06   #5  |  Link
raquete
Registered User
 
Join Date: Nov 2004
Posts: 741
Quote:
clipping/static/distortion in Surcode encoded DTS audio
happens sometimes if the yours 6 mono sources have too loud volume and are PCM 32-bit normalized float (type 3) format.
if they are, change to PCM 32-bit,4-byte integer (type 1).
__________________
search raquete

Last edited by raquete; 4th August 2008 at 15:11.
raquete is offline   Reply With Quote
Reply

Tags
clipping, dts, lpcm, surcode

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 22:05.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.