Posted by musicman on 12/28/06 14:00

kim wrote:
> "musicman" <stradlinizzy@yahoo.com> wrote in message
> news:1167275248.536145.156190@n51g2000cwc.googlegroups.com...
> >
> > kim wrote:
> > > "musicman" <stradlinizzy@yahoo.com> wrote in message
> > > news:1167260894.980801.14590@79g2000cws.googlegroups.com...
> > >
> > > > now, what is the resolution/bit rate of DD 2.0 ??
> > >
> > > There is no standard resolution for DD2.0
> > >
> > > Sampling rate is usually 48Khz. Bitrate varies according to length of
> > > recording. If it drops below 192Kb/s you will not get any surround
> effect.
> > >
> > > (kim)
> >
> > is that better than standard CD resolution of 44/16 ??
>
> No. CD is uncompressed PCM 2.0. Dolby Digital is highly compressed 2.0 using
> the AC-3 codec. It is possible to record a DVD with PCM audio but the
> recording time is greatly reduced. It's sometimes used for music
> compilations of say an hour in length.
>
> (kim)

I'm doing more research and found out the sampling freq. for domestic
Dolby Digital is usually 48 khz, with 18 bit resolution. This yields a
108 dB dynamic range- which even though the format is a "lossful
compression"- that dynamic range is greater than a CD. That seems
amazing to me. Dolby Digital is capable of 24 bit resolution- but it's
doubtful any mid-fi consumer type recorders have 24 bit capability.

The hook is, the bit rate is lower at 384-448 kbps, this is the best
info I could find on specs so far.

I see what they're doing with Dolby Digital- they are "losing" the
quiet part of freqs. that the average listener would not hear anyway,
because there's another "louder" freq. drowning it out at that time.
Crafty...

What puzzles me is, the quick dubs I made to the DVD recorder HDD,
actually rivals anything I've done on CD-R using WAV files, while using
the highest bit rate setting on MusicMatch Jukebox recorder, from my
computer's CD burner.

MP3's always sounded thin and crappy to me- I made a few and actually
tossed them in the trash. The few transfers I did from analog to CD-R,
I always cranked up to WAV files and max bit rate. But these Dolby
Digital 2.0 burned onto DVD blanks, this is showing some promise. It's
just so damn easy to record on this DVD recorder...

I can hear a difference listening to the analog master tape, of course-
the master tape sounds fuller and richer than the Dolby Digital
recording made from it.

but that's the beauty of analog...

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