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Uncompressed Digital Video vs. Uncompressed Digital Audio

R

Radium

Jan 1, 1970
0
Hi:

Why is it that uncompressed digital video can have so many format
[such and RGB as well as linear PCM] but uncompressed digital audio
can only have one format -- PCM??


Thanks,

Radium
 
C

Carlos Moreno

Jan 1, 1970
0
Radium said:
Hi:

Why is it that uncompressed digital video can have so many format
[such and RGB as well as linear PCM] but uncompressed digital audio
can only have one format -- PCM??

First of all, you're very, very *very* mistaken in the statement
that digital audio can only have one format.

But still, the intent of the question is valid; the answer is,
perhaps, in the nature of each signal. With images, you have
sequences of frames that contain spatial information (a two-
dimensional grid of "points"), and each point of this 2D grid
has multi-dimensional information (intensity and color).

Sound is a one-dimensional (scalar) value as a function of
time.

Don't you think there are far more possibilities of ideas to
encode something that is so much more complex and contains so
much more information and atrributes as it is video when
compared to audio?

Carlos
--
 
R

Radium

Jan 1, 1970
0
First of all, you're very, very *very* mistaken in the statement
that digital audio can only have one format.

I was only applying that statement to uncompression digital audio.
There are many types of formats for compressed digital audio. What
formats -- other than PCM -- exist for uncompressed digital audio.
But still, the intent of the question is valid; the answer is,
perhaps, in the nature of each signal. With images, you have
sequences of frames that contain spatial information (a two-
dimensional grid of "points"), and each point of this 2D grid
has multi-dimensional information (intensity and color).

All right.
Sound is a one-dimensional (scalar) value as a function of
time.
Okay.

Don't you think there are far more possibilities of ideas to
encode something that is so much more complex and contains so
much more information and atrributes as it is video when
compared to audio?

Yes. Thanks for clearing much of my confusion.
 
R

robert bristow-johnson

Jan 1, 1970
0
I was only applying that statement to uncompression digital audio.
There are many types of formats for compressed digital audio. What
formats -- other than PCM -- exist for uncompressed digital audio.

Direct Stream Digital a.k.a. Sony SACD (Super Audio CD)

there are different PCM formats that are there to ostensibly make for
better sounding audio or speech (such as A-law or mu-law) given a
fixed word-width.

and, there are lossless compression codes such as Apple Lossless.
that is not simply "PCM".

r b-j
 
M

Michael A. Terrell

Jan 1, 1970
0
Please don't feed the troll. He'll argue with you, no matter what
you say.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
A

Arny Krueger

Jan 1, 1970
0
Why is it that uncompressed digital video can have so many format
[such and RGB as well as linear PCM]

RGB is analog, not digital, so this is not a reasonble question.
but uncompressed digital audio
can only have one format -- PCM??

Not true at all. There are many formats for uncompressed digital audio,
PCM, PFM, PDM, and so on.
 
R

Richard Crowley

Jan 1, 1970
0
"Elan Magavi" wrote ...
PCM is NOT a compressed format.

Yes, that is what the OP said. Your reading is excellent.
"Radium" wrote ...
Hi:

Why is it that uncompressed digital video can have so many format
[such and RGB as well as linear PCM] but uncompressed digital audio
can only have one format -- PCM??


Thanks,

Radium
 
E

Elan Magavi

Jan 1, 1970
0
Richard Crowley said:
"Elan Magavi" wrote ...

Yes, that is what the OP said. Your reading is excellent.

Yes.. I was agreeing with him. :) You're writing is excellent.

"Radium" wrote ...
Hi:

Why is it that uncompressed digital video can have so many format
[such and RGB as well as linear PCM] but uncompressed digital audio
can only have one format -- PCM??


Thanks,

Radium
 
C

Carlos Moreno

Jan 1, 1970
0
Radium said:
I was only applying that statement to uncompression digital audio.
There are many types of formats for compressed digital audio. What
formats -- other than PCM -- exist for uncompressed digital audio.

Differential encoding (notice, *encoding* and not compression),
spectral encoding, wavelet-based encoding, delta encoding (not sure
what the official name is), 1-bit oversampling (though this one falls
in the PCM category, but it is substantially different in terms of
how it ultimately works).

Again, the "intent" of your question was fine, in that in practical
terms, each of these encoding schemes could be used as one of the
encoding blocks for individual features or components of a video
signal --- as a result, there would be a ratio > 1 between the
number of encodings for uncompressed video vs. number of encodings
for uncompressed audio.

Carlos
--
 
C

Carlos Moreno

Jan 1, 1970
0
Michael said:
Carlos Moreno wrote:

Please don't feed the troll. He'll argue with you, no matter what
you say.

True that his original message could conceivably be the result of
a troll doing his trolling.

But he didn't sound too confrontational and certainly didn't argue
too much with my reply. Seemed like a legitimate question to me,
even if one that could have been answered by thinking about it for
a little while. Still, I found it ok.

Carlos
--
 
G

Gene E. Bloch

Jan 1, 1970
0
Elan said:
Yes, that is what the OP said. Your reading is excellent.

[...] You're writing is excellent.
^^^^^^^^

Too bad that the same can not be said about you're's... ;-)


Carlos

I think your wrong. In fact, the same can be said about hi's :)

Or is it his'?

Oh, I *hate* apostrophes!
 
F

Frank

Jan 1, 1970
0
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,
Gene E. Bloch said:
Elan said:
Yes, that is what the OP said. Your reading is excellent.

[...] You're writing is excellent.
^^^^^^^^

Too bad that the same can not be said about you're's... ;-)


Carlos

I think your wrong.

That should be: I think you're wrong.

As in, "I think you are wrong"; "you are" contracts to "you're".
In fact, the same can be said about hi's :)

Or is it his'?

Oh, I *hate* apostrophes!

Whatever happened to basic education in this country?

No wonder what's her name's baby is the hot news story of the month.
:)
 
G

Gene E. Bloch

Jan 1, 1970
0
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,
Gene E. Bloch said:
Elan Magavi wrote:

Yes, that is what the OP said. Your reading is excellent.

[...] You're writing is excellent.
^^^^^^^^

Too bad that the same can not be said about you're's... ;-)


Carlos

I think your wrong.

That should be: I think you're wrong.

As in, "I think you are wrong"; "you are" contracts to "you're".
In fact, the same can be said about hi's :)

Or is it his'?

Oh, I *hate* apostrophes!

Whatever happened to basic education in this country?

No wonder what's her name's baby is the hot news story of the month.
:)

Whatever happened to the idea of humor in this country?

In case you didnt' catch on, m'y response was further satire in
response to Fran'ks satire :)
 
R

Ron N.

Jan 1, 1970
0
someone said:
Why is it that uncompressed digital video can have so many format
[such and RGB as well as linear PCM] but uncompressed digital audio
can only have one format -- PCM??

1) There is more than one format for uncompressed digital
audio (a *lot* more if you have to deal in cross-platform
and legacy format conversion tools).

2) Video information has more dimensions (both in physical
2D or 3D space, and in color space or spectrum) to record,
so there are a lot more choices of vector basis, scaling,
orientation, and bit-formatting, etc., even before compression.


IMHO. YMMV.
 
F

Frank

Jan 1, 1970
0
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,
Gene E. Bloch said:
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,
Gene E. Bloch said:
On 2/12/2007, Carlos Moreno posted this:
Elan Magavi wrote:

Yes, that is what the OP said. Your reading is excellent.

[...] You're writing is excellent.
^^^^^^^^

Too bad that the same can not be said about you're's... ;-)


Carlos

I think your wrong.

That should be: I think you're wrong.

As in, "I think you are wrong"; "you are" contracts to "you're".
In fact, the same can be said about hi's :)

Or is it his'?

Oh, I *hate* apostrophes!

Whatever happened to basic education in this country?

No wonder what's her name's baby is the hot news story of the month.
:)

Whatever happened to the idea of humor in this country?

In case you didnt' catch on, m'y response was further satire in
response to Fran'ks satire :)

I know that, Gene!
 
G

Gene E. Bloch

Jan 1, 1970
0
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,
Gene E. Bloch said:
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,

On 2/12/2007, Carlos Moreno posted this:
Elan Magavi wrote:

Yes, that is what the OP said. Your reading is excellent.

[...] You're writing is excellent.
^^^^^^^^

Too bad that the same can not be said about you're's... ;-)


Carlos

I think your wrong.

That should be: I think you're wrong.

As in, "I think you are wrong"; "you are" contracts to "you're".

In fact, the same can be said about hi's :)

Or is it his'?

Oh, I *hate* apostrophes!

Whatever happened to basic education in this country?

No wonder what's her name's baby is the hot news story of the month.
:)

Whatever happened to the idea of humor in this country?

In case you didnt' catch on, m'y response was further satire in
response to Fran'ks satire :)

I know that, Gene!

Well, then, you are much too subtle for me :)
 
N

nappy

Jan 1, 1970
0
Gene E. Bloch said:
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,
Gene E. Bloch said:
On 2/12/2007, Frank posted this:
Uncompressed Digital Video vs. Uncompressed Digital
Audio>,

On 2/12/2007, Carlos Moreno posted this:
Elan Magavi wrote:

Yes, that is what the OP said. Your reading is excellent.

[...] You're writing is excellent.
^^^^^^^^

Too bad that the same can not be said about you're's... ;-)


Carlos

I think your wrong.

That should be: I think you're wrong.

As in, "I think you are wrong"; "you are" contracts to "you're".

In fact, the same can be said about hi's :)

Or is it his'?

Oh, I *hate* apostrophes!

Whatever happened to basic education in this country?

No wonder what's her name's baby is the hot news story of the month.
:)

Whatever happened to the idea of humor in this country?

In case you didnt' catch on, m'y response was further satire in response
to Fran'ks satire :)

I know that, Gene!

Well, then, you are much too subtle for me :)



I think your both beeding a dead herse here.
 
R

Radium

Jan 1, 1970
0
1) There is more than one format for uncompressed digital
audio (a *lot* more if you have to deal in cross-platform
and legacy format conversion tools).

Would you mind naming one?
 
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