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MPEG-4(ISO/IEC 14496-3) High Efficiency AAC(HE-AAC)¶ó Çϰí Àϸí 'AAC Plus'¶ó°íµµ ºÒ¸®¸ç ±¹³» À§¼º µðÁöÅÐ ¸ÖƼ¹Ìµð¾î ¹æ¼Û S-DMB(Satellite Digital Multimedia Broadcasting) ¼ºñ½ºÀÇ ¿Àµð¿À Ç¥ÁØÀ¸·Î äÅõǾú½À´Ï´Ù. ¿Àµð¿À ½ÅÈ£ÀÇ ½ºÆåÆ®·³Àº ÀúÁ֯ļö ¼ººÐ°ú °íÁ֯ļö ¼ººÐ »çÀÌ¿¡ °ÇÑ ¿¬°ü¼ºÀ» °¡Áý´Ï´Ù. ÀÌ·± Ư¼ºÀ» ÀÌ¿ëÇÏ´Â ´ë¿ªÆø È®Àå ±â¼úÀÎ SBR(Spectral Band Replication) ToolÀÌ MPEG-4 AudioÀÇ Ç¥ÁØÀÌ µÇ¸é¼ ±âÁ¸ÀÇ MPEG-4 AAC ±â¼ú°ú ÇÕÃÄÁø °ÍÀ» MPEG-4 HE AAC¶ó ÇÕ´Ï´Ù. 32bkbps/ch ÀÌÇÏÀÇ ºñÆ®À²¿¡¼ ±âÁ¸ÀÇ AAC LC¿¡ ºñÇØ¼ ´õ ÁÁÀº ¼º´ÉÀ» ³ªÅ¸³À´Ï´Ù. |
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ÇȽºÆ®¸®´Â S-DMB ȯ°æ¿¡¼ MPEG-2 TS¸¦ ÅëÇØ¼ ÃÖÀûÀÇ »óÅ·ΠÀü¼ÛÇÒ ¼ö ÀÖµµ·Ï MPEG-4 HE AAC ºñÆ®½ºÆ®¸²À» »ý¼ºÇÒ ¼ö ÀÖ´Â MPEG-4 HE AAC Encoding ModuleÀ» Á¦°øÇÕ´Ï´Ù. ¶ÇÇÑ MS, TNS, PNS µî ¾ÐÃàÀ» À§ÇÑ °¢Á¾ AAC ÅøÀ» ¿Ïº®ÇÏ¸ç ±¸ÇöÇÏ ¸é¼ SBR Åøµµ ½Ç½Ã°£ ±¸ÇöÇÏ¸é¼ ¿ø·¡ MPEG-4 HE AACÀÇ À½ÁúÀ» À¯ÁöÇÒ ¼ö ÀÖ½À´Ï´Ù. |
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ÇȽºÆ®¸®´Â MPEG-4 HE AAC Decoder´Â PNS, TNS, SBR µîÀÇ ¸ðµç ToolµéÀ» Ç¥Áذú ¿Ïº®ÇÏ°Ô È£È¯µÇµµ·Ï º¹È£È¸¦ ÇÕ´Ï´Ù. ¶Ç ÇÑ, °íÁ¤¼Ò¼öÁ¡ ÇüÅ·Π±¸ÇöÇÏ¸é¼ º¹Àâµµ¸¦ °³¼±ÇÏ¿©, ¸ð¹ÙÀÏ ±â±â µîÀÇ Low-power½Ã½ºÅÛ¿¡¼µµ °íÀ½Áú ¼ºñ½º¸¦ °¡´É Çϵµ·Ï Áö¿øÇÕ´Ï´Ù. |
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Special Features [Encoding] |
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¤ý¾ÐÃàÀ» À§ÇÑ °¢Á¾ Tool (MS, TNS, PNS, SBR) ¿Ïº® Áö¿ø ¤ý½Ç½Ã°£ Encoding ±¸Çö ¤ý°íÀ½Áú ±¸Çö : CD±Þ ¾ÐÃà - ÀÚü °³¹ßµÈ Psychoacoustic Model - ÃÖÀûÈµÈ bitrate-distortion Control |
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Special Features [Decoding] |
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¤ý´Ù¾çÇÑ ÀÓº£µðµå ȯ°æ Áö¿ø - TI, ARM, EQUATOR, x86 Áö¿ø - °íÁ¤¼Ò¼öÁ¡ Decoder ¿Ïº® ±¸Çö ¤ý¾ÐÃàÀ» À§ÇÑ °¢Á¾ Tool (MS, TNS, IS, PNS) ¿Ïº® Áö¿ø ¤ýMPEG-4 Compliant HE AAC Decoding Module |
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