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
Uncompressed Digital Video vs. Uncompressed Digital Audio
Started by ●February 12, 2007
Reply by ●February 12, 20072007-02-12
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??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 --
Reply by ●February 12, 20072007-02-12
On Feb 11, 10:10 pm, Carlos Moreno <cm_clcppm_7b8f93f...@mochima.com> wrote:> 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.
Reply by ●February 12, 20072007-02-12
On Feb 12, 1:33 am, "Radium" <gluceg...@excite.com> wrote:> On Feb 11, 10:10 pm, Carlos Moreno <cm_clcppm_7b8f93f...@mochima.com> > wrote: > > > 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.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
Reply by ●February 12, 20072007-02-12
Carlos Moreno wrote:>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
Reply by ●February 12, 20072007-02-12
"Radium" <glucegen1@excite.com> wrote in message news:1171257638.448937.173060@s48g2000cws.googlegroups.com...> 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.
Reply by ●February 12, 20072007-02-12
PCM is NOT a compressed format. "Radium" <glucegen1@excite.com> wrote in message news:1171257638.448937.173060@s48g2000cws.googlegroups.com...> 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 >
Reply by ●February 12, 20072007-02-12
PCM is NOT a compressed format. "Radium" <glucegen1@excite.com> wrote in message news:1171257638.448937.173060@s48g2000cws.googlegroups.com...> 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 >
Reply by ●February 12, 20072007-02-12
"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 >> > >
Reply by ●February 12, 20072007-02-12
"Richard Crowley" <rcrowley@xpr7t.net> wrote in message news:12t110chbsu72ff@corp.supernews.com...> "Elan Magavi" wrote ... >> PCM is NOT a compressed format. > > 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 >>> >>
