Voice synthesis technology involves storing the characteristics of speech in a computer. These characteristics are then assembled into the required sounds and speech patterns. Because only the characteristics of speech are stored, and not complete voice patches, the reproduction is not a perfect copy of the original voice, but comes off rather stiff and unnatural.
所謂語音合成技術，就是把人說話的聲音特色先儲存在電腦裡，等到有需要：如有人來電要聽笑話時，再覆述出來；因為本來只存入聲音特質，所以覆述不是原音重現，會有些僵硬、不自然。