SBR - Spectral band replication

SBR은 aacPlus/aacp/aac+ 를 위한 코덱이다.

mpeg-2 aac 에서 aacplus가 나오고

mpeg-4 HE-AAC는 그럼.. 어디서 나온 놈이지? -_-

A Swedish company Coding Technologies (acquired by Dolby in 2007) developed and pioneered the use of SBR in its MPEG-2 AAC derived codec called aacPlus, which first appeared in 2001. This codec was submitted to MPEG and formed the basis of MPEG-4 High-Efficiency AAC (HE-AAC), standardized in 2003. Coding Technologies' SBR method has been used with WMA 10 Professional to create WMA 10 Pro LBR, and with MP3 to create mp3PRO. [링크 : http://en.wikipedia.org/wiki/Spectral_band_replication]

2003년 이후부터 SBR이 MPEG-4 HE-AAC에 포함 되었다 라고 해야하려나?

[링크 : http://en.wikipedia.org/wiki/High-Efficiency_Advanced_Audio_Coding]

[링크 : https://software.intel.com/en-us/node/503067]

라이센스 문제가 있는거 같은데..

[링크 : https://code.google.com/p/aacplayer-android/]

일단 규모에 따라 다르지만 $1000 이나 $15000 달러 정도는 필요할 것으로 보인다.

[링크 : http://www.vialicensing.kr/licensing/aac-faq.aspx]