{"id":12061,"date":"2025-08-04T09:00:28","date_gmt":"2025-08-04T00:00:28","guid":{"rendered":"https:\/\/blog.agentsoft.co.kr\/index.php\/2025\/08\/04\/12061\/"},"modified":"2025-08-04T09:00:28","modified_gmt":"2025-08-04T00:00:28","slug":"a-%ea%b4%91%ed%86%b5%ec%8b%a0-9-pcm-%eb%b3%80%ec%a1%b0-%eb%b0%a9%ec%8b%9d","status":"publish","type":"post","link":"https:\/\/blog.agentsoft.co.kr\/index.php\/2025\/08\/04\/12061\/","title":{"rendered":"A+ \uad11\ud1b5\uc2e0 – 9. PCM \ubcc0\uc870 \ubc29\uc2dd"},"content":{"rendered":"

<\/p>\n

\ubaa9\ucc28<\/strong><\/p>\n

1. \uac1c\ub150
\n2. PCM \ube14\ub85d\ub3c4
\n3. \ud45c\ubcf8\ud654(\uc0d8\ud50c\ub9c1)
\n4. \uc591\uc790\ud654(Quantization, \uc815\ub7c9\ud654)
\n5. \ubd80\ud638\ud654(\uc778\ucf54\ub529)
\n6. PCM transmitter \ube14\ub85d\ub3c4
\n7. PCM receiver \ube14\ub85d\ub3c4
\n8. PCM \ub3d9\uc791 \uc815
\n9. PCM \uc7a5\uc810 \ubc0f \ub2e8\uc810<\/p>\n

\ubcf8\ubb38\ub0b4\uc6a9<\/strong><\/p>\n

\uf071 \uac1c\ub150
\n– \ud384\uc2a4 \ucf54\ub4dc \ubcc0\uc870(PCM, Pulse Code Modulation)\ub294 \ud654\uc0c1, \uc74c\uc131, \ub3d9\uc601\uc0c1 \ube44\ub514\uc624, \uac00\uc0c1\ud604\uc2e4 \ub4f1\uacfc \uac19\uc774 \uc5f0\uc18d\uc801\uc778 \uc2dc\uac04\uacfc \uc9c4\ud3ed\uc744 \uac00\uc9c4 \uc544\ub0a0\ub85c\uadf8 \ub370\uc774\ud130\ub97c \ub514\uc9c0\ud138 \uc2e0\ud638\ub85c \ubcc0\ud658\ud558\ub294 \uac83\uc73c\ub85c, \ucf54\ub371(CODEC)\uc744 \uc774\uc6a9\ud55c\ub2e4. <\/p>\n

\uc989, PCM\uc774\ub780 \uc74c\uc131\uc2e0\ud638\uc640 \uac19\uc740 \uc544\ub0a0\ub85c\uadf8 \uc2e0\ud638\ub97c PAM \uc2e0\ud638\ub85c \ubcc0\uc870\ud55c \ud6c4 \uc591\uc790\ud654(Quantization) \ubc0f \ubd80\ud638\ud654(Encoding)\uc744 \uac70\uccd0 Digital code\ub85c \uc804\uc1a1\ud558\ub294 \ubc29\uc2dd\uc774\ub2e4. <\/p>\n

\uf071 PCM \ube14\ub85d\ub3c4<\/p>\n

\uf071 \ud45c\ubcf8\ud654(\uc0d8\ud50c\ub9c1)
\n– \uc74c\uc131\uacfc \uac19\uc740 \uc548\ub0a0\ub85c\uadf8 \uc2e0\ud638\ub97c \ub514\uc9c0\ud138\ud654\ud558\uae30 \uc704\ud574 \uc77c\uc815\ud55c \uac04\uaca9\uc73c\ub85c \uc0d8\ud50c\ub9c1\uc744 \ud558\uc5ec\uc57c \ud55c\ub2e4.
\n– PAM (Pulse Amplitude Modulation)\uc744 \uc774\uc6a9\ud55c\ub2e4.
\n– \uc8fc\uc5b4\uc9c4 \uc544\ub0a0\ub85c\uadf8 \uc2e0\ud638\ub97c \ub098\uc774\ud034\uc2a4\ud2b8 \uae30\uc900\uc5d0 \ub530\ub77c \ud45c\ubcf8\ud654 \ud55c\ub2e4.
\n– \uc544\ub0a0\ub85c\uadf8 \uc74c\uc131\uc2e0\ud638\uc758 \uc8fc\ud30c\uc218 300 ~\u30003,400 Hz\ub85c \ud45c\ubcf8 \ucc44\uc9d1\ub960\uc740 8k\ub85c \ucd08\ub2f9 8000\ubc88 \uc774\ub2e4.
\n– \ud45c\ubcf8\ud654 \uac04\uaca9\uc740 1\/8000\ub85c 125\u339b\uc774\ub2e4. <\/p>\n

\u27f6125\u339b \uac04\uaca9\uc73c\ub85c \ub098\ub204\uc5b4\uc9c4 8000\uac1c\uc758 \ud45c\ubcf8\uce58 \uac01\uac01 8bit\uc758 2\uc9c4 \ubd80\ud654\ub418\uae30 \ub54c\ubb38\uc5d0 8,000 * 8bit = 64kbps\uc758 \ubd80\ud638\uc815\ubcf4\uac00 \ub41c\ub2e4.<\/p>\n

\u203b \ud45c\ubcf8\ucc44\uc9d1\ub960(sampling rate)
\n– \ub098\uc774\ud034\uc2a4\ud2b8 \uc815\ub9ac(Nyquist Theorem) : \ud45c\ubcf8\ud654\ub41c \uc774\uc0b0\uc2e0\ud638\ub85c\ubd80\ud130 \uc6d0\uc2e0\ud638\uc778 \uc544\ub0a0\ub85c\uadf8 \uc2e0\ud638\ub97c \uc644\ubcbd\ud558\uac8c \ubcf5\uc6d0\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc544\ub798\uc758 \uc870\uac74\uc744 \ub9cc\uc871\ud574\uc57c \ud55c\ub2e4.
\n\uf081 \ud45c\ubcf8\ud654 \uc8fc\ud30c\uc218(\uc728) : fs = 2fm (fm = \uc544\ub0a0\ub85c\uadf8 \uc2e0\ud638\uc758 \ucd5c\uace0 \uc8fc\ud30c\uc218)
\n\uf082 \ud45c\ubcf8\ud654 \uac04\uaca9 : T <= 1\/fs\n\n
\ucd9c\ucc98 : \ud574\ud53c\ucea0\ud37c\uc2a4<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

\ubaa9\ucc28 1. \uac1c\ub150 2. PCM \ube14\ub85d\ub3c4 3. \ud45c\ubcf8\ud654(\uc0d8\ud50c\ub9c1) 4. \uc591\uc790\ud654(Quantization, \uc815\ub7c9\ud654) 5. \ubd80\ud638\ud654(\uc778\ucf54\ub529) 6. PCM transmitter \ube14\ub85d\ub3c4 7. PCM receiver \ube14\ub85d\ub3c4 8. PCM \ub3d9\uc791 \uc815 9. PCM \uc7a5\uc810 \ubc0f \ub2e8\uc810 \ubcf8\ubb38\ub0b4\uc6a9 \uf071 \uac1c\ub150 – \ud384\uc2a4 \ucf54\ub4dc \ubcc0\uc870(PCM, Pulse Code Modulation)\ub294 \ud654\uc0c1, \uc74c\uc131, \ub3d9\uc601\uc0c1 \ube44\ub514\uc624, \uac00\uc0c1\ud604\uc2e4 \ub4f1\uacfc \uac19\uc774 \uc5f0\uc18d\uc801\uc778 \uc2dc\uac04\uacfc \uc9c4\ud3ed\uc744 \uac00\uc9c4 \uc544\ub0a0\ub85c\uadf8 \ub370\uc774\ud130\ub97c \ub514\uc9c0\ud138 \uc2e0\ud638\ub85c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[425,4949,17422,17412,15393],"class_list":["post-12061","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-12-","tag-a","tag-17422","tag-17412","tag-15393"],"_links":{"self":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/posts\/12061","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/comments?post=12061"}],"version-history":[{"count":0,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/posts\/12061\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=12061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/categories?post=12061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/tags?post=12061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}