関連ワード:  what is pulse code modulation    what is pulse code modulation (pcm)    what is pulse code modulation and demodulation    what is pulse code modulation in digital communication    what is pulse code modulation used for    what is pulse code modulation in computer networks    what is pulse code modulation in communication system    what is differential pulse code modulation    what is pulse code modulation pcm primarily used for    what is linear pulse code modulation