Dolby noise issue

Archived from groups: rec.audio.pro (More info?)

Yef <e97y@yahoo.com> wrote:
>
>I have an audio source of people speaking where, just as
>a person begins speaking a word, there is a cluck or kuk
>sound. The format is AC3 which is Dolby 5.1. However
>I also get this problem with from Dolby stereo AC3.
>The problem is greatly exacerbated by converting this
>AC3 sound to MP3 format.
>
>Can anyone tell me what causes this?
>Is this some form of protection?

Probably bad dialogue gating and not related to the Dolby encoding.

And yes, lossy compression systems tend to deal with these kinds of
sounds poorly.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Archived from groups: rec.audio.pro (More info?)

Scott Dorsey wrote:
> Yef <e97y@yahoo.com> wrote:
> >
> >I have an audio source of people speaking where, just as
> >a person begins speaking a word, there is a cluck or kuk
> >sound. The format is AC3 which is Dolby 5.1. However
> >I also get this problem with from Dolby stereo AC3.
> >The problem is greatly exacerbated by converting this
> >AC3 sound to MP3 format.
> >
> >Can anyone tell me what causes this?
> >Is this some form of protection?
>
> Probably bad dialogue gating and not related to the Dolby encoding.

Nope.

I checked: I copied the AC3 to the hard drive and encoded
and played it back, and it had clicking sounds just as characters
began speaking words. Then, I played the same AC3 in a DVD player
program and there was no distortion at all.