Lpc Coding
Chapter 1
Introduction
1.1 Speech Production
When you speak, Air is pushed from your lung through your vocal tract and out of your mouth comes speech.
For certain voiced sound, your vocal cords vibrate (open and close). The rate at which the vocal cords vibrate determines the pitch of your voice. Women and young children tend to have high pitch (fast vibration) while adult males tend to have low pitch (slow vibration).
For certain fricatives and plosive (or unvoiced) sound, your vocal cords do not vibrate but remain constantly opened.
The shape of your vocal tract determines the sound that you make. As you speak, your vocal tract changes its shape producing different sound.
The shape of the vocal tract changes relatively slowly (on the scale of 10 msec to 100 msec).
The amount of air coming from your lung determines the loudness of your voice.
1.2 Speech Signal
Speech signal carries with it both message and speaker information. Speech is used to......
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