Original sentence: Both ideas are based on the principle that the human brain tends to consider high frequencies to be either harmonic phenomena associated with lower frequencies or noise, and is thus less sensitive to the exact content of high frequencies in audio signals.It can be combined with any audio compression codec: the codec transmits the lower frequencies of the spectrum and SBR creates associated higher frequency content based on the lower frequencies and transmitted side information.It has been combined with AAC to create MPEG-4 High Efficiency AAC (HE AAC), with MP3 to create Mp3PRO and with MPEG-2.It is used in broadcast systems like Digital Radio Mondiale and XM Satellite Radio.Spectral Band Replication or SBR is a technology to enhance audio or speech codecs, especially at low bit rates.When applicable, it involves reconstruction of a noise-like spectrum by employing a noise-generator with some statistical information (level, distribution, ranges), so the decoding result is not deterministic among multiple decoding processes of the same encoded data
Edited sentence: Both ideas do work very well because the human brain can only distinguish high frequencies to be either ripples of lower frequencies or noise, but not their exact representation.It can be combined with any audio compression codec: the codec transmits the lower frequencies of the spectrum and SBR reconstructs the higher frequencies based on the lower frequencies and transmitted side information.It is already combined with AAC to create MPEG-4 High Efficiency AAC (HE AAC), with MP3 to create Mp3PRO and with MPEG-2.It is used in broadcast systems like DRM and XM Satellite Radio.Spectral Band Replication or SBR is a technology to enhance audio or speech codecs especially at low bitrates.When applicable it also involves reconstruction of noise-like spectrum by employing a noise-generator with some statistical information (level, distribution, ranges), so the decoding result is not deterministic among multiple decoding processes of the same encoded data