
Bellamy, John C.,
Digital
Telephony,
Second Edition
(New York: Wiley, 1991),
98-111 and 472-476.
For engineering purposes, we
consider
R', G',
and
B'
to be
encoded with identical transfer
functions. In practice, encoding
gain differs owing to white
balance. Also, the encoding
transfer functions may be
adjusted differently for artistic
purposes during image capture
or postproduction.
Excursion in analog 480i
systems is often expressed in
IRE
units,
which I will introduce on
page 327.
As l have mentioned, CD audio is coded linearly, with
16 bits per sample. Audio for digital telephony usually
has just 8 bits