Re: Mobile voice cryptography

In message <Xns9C341166EAB34bubbachipsetone@xxxxxxxxxxx>, Bubba <nickname@xxxxxxxxxxxxxxxxxxx> writes
Technically, though, it would be possible to sample 3.1kHz GSM sound
range, modulate it by a certain pattern (making it impossible to interpret
by human) and then demodulate it on the other side, right?

Only if GSM's speech compression was reversible.

It isn't, so if your "modulated by a certain pattern" sound doesn't have the statistics of normal speech assumed by the compression, what comes out at the far end is likely to be very different from what you put in.

--
Richard Herring
.

Relevant Pages

  • Re: Extracting patterned filenames from [glob] without a loop - possible?
    ... > according to the original pattern of only looking for files with this ... impossible to create a precise matching pattern in the [regexp] ... So that leaves just matching the file name. ... I interpret "_" as a literal underscore you want in the file name. ...
    (comp.lang.tcl)
  • Re: converting single to integer
    ... and interpret it as a Single, ... sincerely doubt it would return the same value as that bit pattern ... any integer requiring over that many bits for representation will ... lose precision if cast to a Single. ...
    (microsoft.public.vb.general.discussion)
  • Re: java newbie question
    ... dave wrote: ... I also think of type as how the JVM will interpret any given bit pattern to which the variable is bound. ...
    (comp.lang.java.programmer)
  • Re: float
    ... It's up to the compiler/program to interpret ... For example if a bit pattern is ... unit where its meaning may ...
    (alt.comp.lang.learn.c-cpp)
  • Re: converting single to integer
    ... If by "different value" you mean a differing internal representation for ... and interpret it as a Single, ... sincerely doubt it would return the same value as that bit pattern ... newsgroups if possible). ...
    (microsoft.public.vb.general.discussion)
Quantcast