Audio compression in DV/HDV at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > All Things Audio

All Things Audio
Everything Audio, from acquisition to postproduction.


Reply
 
Thread Tools Search this Thread
Old November 21st, 2006, 11:35 PM   #1
Major Player
 
Join Date: Feb 2005
Location: Los Angeles, CA
Posts: 429
Audio compression in DV/HDV

Here is something i've been wondering about: a lot of television shows are shot on minidv and hdvcams these days, even on networks such as discovery, etc etc. and theres always a audio guy with a boom pole capturing audio, on their own mixer/recorder.

I understand that this is to avoid the compression that would be present in going straight to the camera tape, but how does the audio quality differ (straight to tape audio vs. independent recorders)? Is it a night and day difference or is it comparable?

I've been wondering about this for a while, hope someone can respond to this. Thanks!
Spike Spiegel is offline   Reply With Quote
Old November 22nd, 2006, 12:40 AM   #2
Wrangler
 
Join Date: Oct 2002
Location: Los Angeles, CA
Posts: 2,100
If it's a television show, chances are the audio is going from the mixer's mixer to the XLR input on the camera.

TV shows generally don't have the time to sync double system audio, but some do, especially if it helps to keep the camera(s) untethered.

On some shows, they go wireless from the mixer to the camera. I've done that before when I didn't want to slowed down by my sound guy.
__________________
My Work: nateweaver.net
Nate Weaver is offline   Reply With Quote
Old November 22nd, 2006, 02:31 AM   #3
Major Player
 
Join Date: Feb 2005
Location: Los Angeles, CA
Posts: 429
If it is meant for television, is it alright to record directly onto the tape that the camera is recording on? I mean, isn't the audio going to be of lower quality, is this acceptable to networks?
Spike Spiegel is offline   Reply With Quote
Old November 22nd, 2006, 10:37 AM   #4
Major Player
 
Join Date: Mar 2006
Location: San Francisco, California
Posts: 487
Well, DV audio is uncompressed PCM, 12 or 16bit, 48khz audio at 1536Kbps. HDV audio is 48kHz, 16 bit, at 384Kbps. I don't know what each networks accept, however.
Chris Harris is offline   Reply With Quote
Old November 24th, 2006, 10:38 AM   #5
Regular Crew
 
Join Date: Apr 2006
Location: Singapore
Posts: 86
Quote:
Originally Posted by Chris Harris
Well, DV audio is uncompressed PCM, 12 or 16bit, 48khz audio at 1536Kbps. HDV audio is 48kHz, 16 bit, at 384Kbps. I don't know what each networks accept, however.
Am I reading this right or is it a typo? HDV records audio at a lower bitrate than DV?
Zulkifli Yusof is offline   Reply With Quote
Old November 24th, 2006, 10:41 AM   #6
Major Player
 
Join Date: May 2005
Location: Europe
Posts: 844
Quote:
Originally Posted by Zulkifli Yusof
Am I reading this right or is it a typo? HDV records audio at a lower bitrate than DV?
Zulkifli - yes you're reading it right. HDV records in compressed audio at 384kbps. DV is, perhaps somewhat ironically, uncompressed audio. That's the way it is.
Stu Holmes is offline   Reply With Quote
Old November 24th, 2006, 02:03 PM   #7
Trustee
 
Join Date: Aug 2005
Location: Berkshire, UK
Posts: 1,562
Quote:
Originally Posted by Stu Holmes
That's the way it is.
Hey Stu - have you ever heard glitches in either DV or HDV audio? Especially stutters?
Matt Davis is offline   Reply With Quote
Old November 24th, 2006, 07:16 PM   #8
Major Player
 
Join Date: May 2005
Location: Europe
Posts: 844
Quote:
Originally Posted by Matt Daviss
Hey Stu - have you ever heard glitches in either DV or HDV audio? Especially stutters?
Can't say I have at all really Matt.
Are you experiencing some audio probs with your cam(s) ?
Stu Holmes is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > All Things Audio

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 06:03 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network