xr100
Addicted to Fun and Learning
It looks like we have confusion with the terms. For you, if I understand correctly, a “signal” is some information useful for recipient.
OK, I was a bit sloppy with terminology in that post.
Source: Recent Contributions to the Mathematical Theory of Communication (Warren Weaver.)
Accordingly an audio signal can be interpreted as an information useful for recipient and as only a carrier of information.
To quote from the above-linked document:
"The word information, in this theory, is used in a special sense that must not be confused with its ordinary usage. In particular, information must not be confused with meaning.
"In fact, two messages, one of which is heavily loaded with meaning and the other of which is pure nonsense, can be exactly equivalent, from the present viewpoint, as regards information. It is this, undoubtedly, that Shannon means when he says that 'the semantic aspects of communication are irrelevant to the engineering aspects.' But this does not mean that the engineering aspects are necessarily irrelevant to the semantic aspects."
Can we call white noise an audio signal? In my interpretation it is a valid audio signal. What information it carries is another question, it depends on the recipient and context.
~1kHz sine, slightly under 0dBr, truncated to 16-bits in one file, TPDF dithered to 16-bits in the other.
Original sine then subtracted from truncated/dithered output, then the signal scaled by +90dB.
The "non-white noise" can be heard in the truncated file.
Download link.
(Link expires in one week.)
Last edited: