Re: Currently-Available Highest-Quality Linear PCM Video?

Bob Myers wrote:
"Radium" <glucegen1@xxxxxxxxxx> wrote in message
news:1161280758.174444.71260@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Why not any of
the other uncompressed digital formats?

What uncompressed digital formats -- other than linear PCM -- exist?

Do you know
why linear PCM is used when it IS used?

It offers the best quality. Imagine what wavetable synth would sound
like if it used mp3s in place of Wavs.

Read the thread where some imbecile asks about an "mp3table":

http://groups.google.com/group/comp.music.midi/browse_frm/thread/f5094bc8af281363/e080ba93f082e11e?lnk=st&q=mp3table&rnum=1&hl=en#e080ba93f082e11e

Please answer it, and then you will have cleared up your confusion
regarding "bit rate" and "pixel rate."

I never used the term "pixel rate". Pixel is the video equivalent of
channel. Stereo audio has two channels. Mono has only one.

I did use the term "sample rate". Sample rate is the rate at which an
analog signal is sampled via Pulse-Amplitude Modulation. For CDs, this
rate is 44.1 khz. The PAM carrier signal is at a frequency of 44.1 khz.


If you divide 1,411,200 by 44,100, what number do you
get?

32

What is the significance of this number?

The bit-rate divided by the sample-rate. What else?

Which means what? Do you think this might have something
to do with the number of bits in each sample?

CD audio has two channels because it is stereo. Each channels has a bit
resolution of 16-bit. So in each channel there are 16 bits per sample.
Combine the two channels are there are 32 bits per sample.

Do you now
see how that relates to your confusion regarding pixel rate
and bit rate?

Once again, I never used the term "pixel rate". I did use the terms
"sample rate" and "bit rate".

"Pixel rate" in video = "channel rate" in audio

Both "channel rate" and "pixel rate" and totally meaningless.


Why are you so hung up on "linear PCM"
as opposed to any of several hundred (at least) other possible
encoding schemes?

Because -- as I said before -- I don't like the annoying artifacts that
occur in compressed video formats. Those nasty pixelations associated
with VC-1 -- and other compressed -- video just make me gag.

And yet you seem to believe that "linear PCM" is the only
possible format which would not exhibit those artifacts,

Nope. Linear-PCM video can be just as bad as MPEG -- and possibly even
worse -- if the image-resolution [in pixel X pixel], the color-depth
[bit-resolution], and/or sample rate [in hz] are too low.

What do you think "color depth" or "bit resolution"
equates to in terms of the image quality?

Color-depth or "bit-resolution" determines the number of colors that
can be displayed. 8-bit video can display a maximum of 2^16 colors [or
256 colors]. IOW, a color-resolution of n-bit means that a maximum of
2^n colors. In audio, the bit-resolution determines how many levels of
loudness can be handled [too loud and you get clipping, too soft and
you get quantization error].

What will a reduction
in this parameter change in the image?

A decrease the amount of available colors. However, compression of this
parameter is done via my "real WMV", the artifacts won't be as ugly as
it would be in linear-PCM or any compression other than my "real WMV".
Much in the same way the artifacts in a 120 kbps WMA file go
un-noticed. In a Wave file, 120 kbps would sound horrible -- this is
due to the absence of the perceptual encoding used in WMA. MP3s, and
other [non-WMA] compressed audio sound terrible to me. I also hate
aliasing so the sample rate for audio must be at least 44,100 hz.

.

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