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Why do we seem to be snobs with our ears but not our eyes? - Page 5

post #61 of 65
3/10/10 at 10:35pm
Quote:
Originally Posted by b0dhi View Post
1: There are lots of videophiles. A 3 second Google search would reveal this. Also, you may have heard of this place called a "cinema".
What is this "cinema" you speak of? Seriously though, funny you mention that, about two minutes after I posted that I saw a link on wikipedia to "Videophile" from some other article I was reading. In my defense, it's only a stub.

Quote:
Originally Posted by b0dhi View Post
2: Both audio and video are in the end analog - neither is "purely digital" any more than the other.
To the best of my knowledge, HDMI and DVI allow for the transfer of a purely digital (discrete values) video signal to a digital display, without the need to convert to an analog signal. An old fashioned TV (or as I call it, "my TV") does require an analog signal.

The way in which we reproduce video lends itself to discrete values. There is a discrete value of pixels in the image, a discrete value of frames per second, and a discrete value of possible colors, which can all be transferred to an output device digitally (with numbers). The way we reproduce audio doesn't work this way (voltages cause movement of a driver), and is continuously variable, thus the requirement of a conversion of a digital signal to an analog signal.
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post #62 of 65
3/11/10 at 6:08am
Quote:
Originally Posted by DSGant View Post
To the best of my knowledge, HDMI and DVI allow for the transfer of a purely digital (discrete values) video signal to a digital display, without the need to convert to an analog signal. An old fashioned TV (or as I call it, "my TV") does require an analog signal.

The way in which we reproduce video lends itself to discrete values. There is a discrete value of pixels in the image, a discrete value of frames per second, and a discrete value of possible colors, which can all be transferred to an output device digitally (with numbers). The way we reproduce audio doesn't work this way (voltages cause movement of a driver), and is continuously variable, thus the requirement of a conversion of a digital signal to an analog signal.
HDMI carries audio data as well you realise. There is no fundamental difference between audio and video in the digital domain. For the examples you mentioned, audio has a discrete sampling rate, a discrete number of possible amplitudes, and a discrete number of channels. The only major difference is the type of modulation used when it's eventually converted to analog. Where a digital TV might control the transparency of a liquid crystal cell, a speaker will control the excursion of a transducer. In the case of the TV, the mechanism might change with technology, but in the end a binary number must be converted to a proportional transmission of *analog* light.
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post #63 of 65
3/11/10 at 6:12am
You are all too smart...
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post #64 of 65
3/11/10 at 11:15pm
Quote:
Originally Posted by b0dhi View Post
HDMI carries audio data as well you realise.
That has no bearing on the veracity of my statement that it carries a digital signal for video.

Quote:
Originally Posted by b0dhi View Post
There is no fundamental difference between audio and video in the digital domain. For the examples you mentioned, audio has a discrete sampling rate, a discrete number of possible amplitudes, and a discrete number of channels.
That is a description of audio data stored in a digital format, not a description of the end product produced, whereas the end product on a display is, in fact, a set of integer values for pixels, frames over time, and colors.

Quote:
Originally Posted by b0dhi View Post
The only major difference is the type of modulation used when it's eventually converted to analog. Where a digital TV might control the transparency of a liquid crystal cell, a speaker will control the excursion of a transducer. In the case of the TV, the mechanism might change with technology, but in the end a binary number must be converted to a proportional transmission of *analog* light.
Light is not an analog signal. Analog doesn't mean "real". An analog signal is one in which continuously variable (non-integer) value of some aspect a signal (voltage, for example) is representational of some other continuously variable signal. It's "analogous", that's where the word comes from. Like analogy.

Anyway, you seem more interested in argument than information exchange, at least to me. I'm not. So I'm done. I'm dangerously close to turning into this guy.
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post #65 of 65
3/12/10 at 2:37am
Quote:
That is a description of audio data stored in a digital format, not a description of the end product produced, whereas the end product on a display is, in fact, a set of integer values for pixels
Wow, just wow.

Let's just agree to disagree.
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