28 Sep
2007
28 Sep
'07
1:29 a.m.
Dominique Michel <dominique.michel(a)citycable.ch> sez:
Personally, I don't like it. I prefer very much a good stereo sound in the
original language (with some kind of text if it is a language that I don't
understand) like on the Swedish TV.
For that PCM-DSD stuff. I prefer PCM because we can archive a good sound
quality with a much lower bandwitch. DSD was fine at the beginning of digital
recording because it was nothing else (for what I know), but for today's
professional audio, DSD is a waste of resources because of the huge needed
bandwitch.
Dominique
This hits near something I was wondering: Wouldn't it be pretty easy
to do lossless compression on a DSD stream. Since it's only one bit,
It seems like you could use simple run-length encoding to achieve
pretty good results.
~Maitland
28 Sep
28 Sep
2:06 a.m.
New subject: Direct Stream Digital / Pulse Density
Maitland Vaughan-Turner wrote:
This hits near something I was wondering:
Wouldn't it be pretty easy
to do lossless compression on a DSD stream. Since it's only one bit,
It seems like you could use simple run-length encoding to achieve
pretty good results.
I pretty sure you are wrong here. Yes, RLE would probably work pretty
well on the DSD encoded version of a digitally generated sine wave.
However, on real analogue inputs there is sure to be a lot of very low
level noise which will result in very short run lengths.
Also be aware that all (neglecting ancient stuff like A-law, u-law and
IDPCM) recent audio codecs doe their encoding in the frequency domain
where it is easier to find redundancy than in the time domain.
Erik
--
-----------------------------------------------------------------
Erik de Castro Lopo
-----------------------------------------------------------------
"And MS thinks Linux is vulnerable to forking? 95, 95 OEM SR2, 98, 98SE,
ME, NT, 2000, Bob, .NET, CE, Datacenter, Server, Adv. Server, and now
Web Server, sheesh." -- BTS on LinuxToday.com
6:09 a.m.
New subject: Direct Stream Digital / Pulse Density
On Fri, Sep 28, 2007 at 02:06:41PM +1000, Erik de Castro Lopo wrote:
Maitland Vaughan-Turner wrote:
OTOH it would be rather easy to do *lossy* compression on a DSD stream.
--
FA
Laboratorio di Acustica ed Elettroacustica
Parma, Italia
Lascia la spina, cogli la rosa.
This hits near something I was wondering:
Wouldn't it be pretty easy
to do lossless compression on a DSD stream. Since it's only one bit,
It seems like you could use simple run-length encoding to achieve
pretty good results.
I pretty sure you are wrong here. Yes, RLE would probably work pretty
well on the DSD encoded version of a digitally generated sine wave.
6262
days inactive
6263
days old
linux-audio-dev@lists.linuxaudio.org
2 comments
3 participants
participants (3)
-
Erik de Castro Lopo -
Fons Adriaensen -
Maitland Vaughan-Turner