欧米ã®å¤§ä¼æ¥ããã¯ã¤ããã¼ã¿ã®ã¸ã¬ã³ãã«å¼·ãã£ãæ¥æ¬ã ã
æ¥æ¬ã«ã¯æ§ã
ãªè¦å¶ããã£ã¦æ°è¦äºæ¥ãé»å®³ãã¦ããã¨ãããããæ°ãã解éè¦å¶ããããã人æãæµååããªããæ°ããèä½æ¨©æ³ã«ãã§ã¢ã¦ã¼ã¹ããªãããGoogleãYoutubeãçã¾ããªããæ°ããæ³å¾ã縦å²ãã ããéä¿¡ã¨æ¾éã®èåãé²ã¾ãªããã ããè¦å¶ç·©åãå¿
è¦ãªã®ã ã確ãã«ããããç¥ããªããå証ãããã
ãã³ãã³åç»ã¯ãªã¼ãã¼ã¬ã¤ã§ã³ã¡ã³ããæµãã¦ããåä¸æ§ä¿æ権ã侵害ãã¦ããç¹ã§Youtubeãããæ³çãªã¹ã¯ã大ãããã ãä»ã®ã¨ããç¹çãã¦ãããé»æ©ã¡ã¼ã«ã¼ã®é³æ¥½ãã¬ã¼ã¤ã¸ã®åå
¥ã¯éå½ã®MPManã¨æ¯ã¹ã¦åºé
ããããèä½æ¨©æ³ã®è¦å¶ç·©åãå¾
ããå社ã¨ã追éããã
MPManç»å ´åå¤ã®1997å¹´ãããIMFã·ã§ãã¯ã«æºããéå½ã¡ã¼ã«ã¼ããæ¥æ¬ã¡ã¼ã«ã¼ã®æ¹ããã£ã¨æè¡åãé«ãã£ããå½æMP3ã¯å¥½äºå®¶ãã²ã£ãã楽ãããããªå¦ä½ãããæè¡ã§ãCDã®ãªããã³ã°ã«ãé³å£°ãã¡ã¤ã«ã®å§ç¸®ã«ãå¾ä½ã®ç¥ããªãããªã¼ã½ãããå¿
è¦ããã£ããæµ·è³çã½ããã¨åããããªæ±ãã ã£ãã®ã ã
NTTã¯MPEG-4ã§ã®å½éæ¨æºåã¸åãã¦MPEG-1 Layer 3 Audio (MP3)ããããã£ã¨å§ç¸®çã¨é³è³ªã®ããæè¡(Twin VQ)ã§é³æ¥½é
ä¿¡ãã¸ãã¹ã«ä¹ãåºããã¨ãã¦ããããã¬ã³ã¼ãä¼ç¤¾ã®ååãå¾ããããã¢ã«çã¾ã£ã¦ããããããããã¦ããéã«éå½çºã®MP3ãã¬ã¼ã¤ã話é¡ã¨ãªããå½å
ã¡ã¼ã«ã¼ããªãå´©ãçã«è¿½éãããããã¨ããªãã¾ã¾ãå¾çºã®Appleã«æãå»ãããã
é»ååºçã ã£ã¦æ¥æ¬ãæ©ãã£ããå°ãªãã¨ã2008å¹´ã¾ã§æ¥æ¬ãä¸çæ大ã®é»ååºç大å½ã ã£ããã2009å¹´ã«ç±³å½ãã追ãæããããå¦ãã¯å¾®å¦ãªæ
å¢ã ãKindleã話é¡ã¨ãªã£ã¦ãããé»åãã¼ãã¼ã使ã£ãé»åããã¯ãã¬ã¼ã¤ã¼ã ã£ã¦SONYã®Librieãããã½ããã¯ã®ã·ã°ãããã¯ãå
è¡ãã¦ãããé¡ãã°NECãæ©ãã1993å¹´ã«æ¶²æ¶ãã¼ã¹ã®é»åããã¯ãã¬ã¼ã¤ãçºå£²ãã¦ããã
LibrieãKindleã«è¿½ãæãããã®ã¯æè¡åã®å·®ã§ã¯ãªããSONYã権å©ä¿è·ã«ãã ãã£ã¦MP3ãã¬ã¼ã¤ã¼ã«åºé
ãããã¨ã«å¯¾ãã¦ãã°ã«ã¼ãã«ã¬ã³ã¼ãä¼ç¤¾ãæ±ãã¦ãããã¨ã«ããå©çç¸åãææããããçéãã§ã¯ãªãããé»åæ¸ç±ã§ãåãããã«ã³ã³ãã³ãã®å£ã«é»ã¾ããã®ã ãããå°ãªãã¨ã2004å¹´å½æãåºç社ã¯å£²ãåãã§ç´ãããå®ãä¾¡æ ¼ã§ã³ã³ãã³ããæä¾ããæ°ã¯ãªãã£ããããã£ãªã¢ã¯ã¡ã¼ã«ã¼ã«å¯¾ãã¦ã¢ãã¤ã«ã»ãã¼ã¿éä¿¡ãå»ä¾¡ã§è²¸ãåºãæ§æ³ãæã£ã¦ããªãã£ããSONYã¯æ¬§ç±³ã§é»åæ¸ç±ãªã¼ãã¼äºæ¥ãç¶ãã¦Kindleã«ç¶ã2ä½ã«ã¤ãã¦ããã
ç·ãã¦æ¥æ¬ã®å¤§ä¼æ¥ã¯ç±³å½ã®å¤§ä¼æ¥ã¨æ¯ã¹ã¦ã¤ããã¼ã¿ã®ã¸ã¬ã³ãã«å¼·ããä¾ãã°NECãå¯å£«éãIBMãDECãããã£ã¨æ©ããã½ã³ã³å¸å ´ã«åå
¥ãããNTTãã³ã¢ã¯AT&TãBTãããæ©ãã¢ãã¤ã«ã»ã¤ã³ã¿ã¼ããããéæãããSONYãPanasonicã¯AmazonãB&Nãããæ©ãé»åãã¼ãã¼ã使ã£ãé»åæ¸ç±ãªã¼ãã¼ãåºããæ¥æ¬ã®åºç社ã¯æ¬§ç±³ãããæ©ãã±ã¼ã¿ã¤åãé»åæ¸ç±ã§æ°ç¾ååã売ãä¸ãã¦ãããæ¿æ²»ã»çµæ¸ã®ä¸å¿ãå
¨ã¦æ±äº¬ã«éä¸ãã¦æ
å ±ãææçéãæ©ãä¸ãé·æéç¨ã¨å¹´åè³éãåæã¨ãã¦ããããã«ãçæçãªææãããä¼æ¥ã®ä¸é·æçãªçºå±ã®ããã®å¸ç³ã«å¯¾ããçµå¶é£ãä¸å
層ã®ç解ãå¾ãããã£ãã®ã ãããã
æ¥æ¬ã®å¤§ä¼æ¥ã§ã¯é·æã®ç¹°ãè¿ãã²ã¼ã ãåæã¨ãã¦ããããã«ããããæ¢åã®äºæ¥ã«ææãä¸ããå¯è½æ§ãããä¸ã«ãçæçãªæè³ååã®ä¸éæãªæ¡ä»¶ã«å¯¾ãã¦ã¯å²ã¨ç©æ¥µçã«æè³ã§ããåé¢ã社å
å¤ã§ã®å©å®³è¡çªãç´äºãªã¹ã¯ã«å¯¾ãã¦ã¯é度ã«ææã ã£ãã®ã§ã¯ãªãããMP3ãã¬ã¼ã¤ã¼ã®ä¾ã²ã¨ã¤ã¿ã¦ãåããããã«ãæ³å¾ãç¦ãã¦ãããã¨ã«å¯¾ãã¦ã ãã§ãªããæ³å¾ã®æ³å®ãã¦ããªãæ°æè¡ã«å¯¾ãã¦å
é£ãåããã¨ã«ã¯æ¶æ¥µçã§ãç±³å½ã©ãããéå½ã®ãã³ãã£ã¼ä¼æ¥ã«ãå¾å¡µãæãããããã©ãããæããã«åæ³çãªãµã¼ãã¹ã製åã§ãã£ã¦ããæ¢åã®å¤§å£åå¼å
ã®ãã¸ãã¹ã¢ãã«ã«å½±é¿ããä¼ç»ã¯éã«è¬ãããä¾ãããã
ã ããæ©å¨ã¬ãã«ã®ç ´å£çãªæè¡ã«å¯¾ãã¦ã¯ç±³å½ã¨ããã¯æ¯è¼çãã¾ã追éã§ããä¸æ¹ã§ãéä¿¡ãã³ã³ãã³ããªã©ç°æ¥ç¨®ã絡ãã§æ³çç´äºã®å¯è½æ§ãçããé端ã«èº«åããåããªããªã£ãã®ã§ã¯ãªãããåé¡ã®æ ¹ã¯éå°è¦å¶ããã¯å©å®³å¯¾ç«ã«ããç´äºãé¿ãããã¨ããè¦ç¯æèã®åé¡ã§ãããããã¯æ¬§ç±³ä¸¦ã¿ã«è¦å¶ãç·©åããã¨ããã§è§£æ±ºãé£ããããã¦ãã®äºå¿ã主義ã¯æ¥æ¬ã«éã£ã話ã§ã¯ãªãã欧米ã®å¤§ä¼æ¥ã«ãæ ¹å¼·ããããéãã¯ãããã¿ã®å°ããªãã³ãã£ã¼ä¼æ¥ã«ã¨ã£ã¦ããªã¹ã¯ããã¼ã ãã§ãªã大å£é¡§å®¢ãåªç§ãªäººæãç²å¾ãããããå¦ãã«ãã£ãã®ã§ã¯ãªããã
(ãã¼ã年代ã®ã½ããã¦ã§ã¢ã«ã¿ãåç´çµ±åã¨æé©åã®æ§é è¦å ãã«ç¶ã)