Works Works before ISA
Computer Voice Fields™ (CVF) in dB/semitone scale
My F0 analysis is done by bandpass filtering the time signal and then searching every
voice period in the time signal using my unique method. By searching in the time signal, each
voive period can be determined with high accuracy F0, and even small variations in the fundamental frequency can be seen. My unique F0 algorithm also makes it possible to determine the jitter and the shimmer.
My F0 algorithm has been in use for
39 years since 1984 and has been running in real time on the
NEC's µPD7720 signal
processor since 1985, 38 years ago. Analysis of images I have from the very beginning coded
Neon object-oriented programming language. Who else would have done pitch analysis in Finland already on
1984, 39 years ago, and already on
1985 in real time? In the pictures the phrase
"Ai ai kun on kaunis päivä" (Oh ai when it's a beautiful day) is a voice field and a phonetogram on a
semitone scale. Each identified F0 period is displayed separately in the
voice field. Automatically searches for dB values for the
highest and lowest pitch of all semitones.
F0
histogram
in semitone scale.
F0 histogram in a tenth semitone scale.
