In telecommunication, the term white facsimile transmission has the following meanings:
- In an amplitude-modulated facsimile system, transmission in which the maximum transmitted power corresponds to the minimum density, i.e., the white area, of the object.
- In a frequency-modulated facsimile system, transmission in which the lowest transmitted frequency corresponds to the minimum density i.e., the white area, of the object.
Both of these terms became outmoded in the late 20th century except in specialist usage, as most fax machines now use the digital ITU-T fax standards, which encode the image digitally over a QAM-modulated signal. See also Black facsimile transmission.
Famous quotes containing the words white and/or facsimile:
“He [Roosevelt] has made some speeches that indicate that he is going quite beyond anything that he advocated when he was in the White House, and has proposed a program which is absolutely impossible to carry out except by a revision of the Constitution.”
—William Howard Taft (1857–1930)
“God gave the righteous man a certificate entitling him to food and raiment, but the unrighteous man found a facsimile of the same in God’s coffers, and appropriated it, and obtained food and raiment like the former. It is one of the most extensive systems of counterfeiting that the world has seen.”
—Henry David Thoreau (1817–1862)