scalable sampling rate造句

The MPEG-2 Part 7 standard ( Advanced Audio Coding ) was first published in 1997 and offers three default profiles : Low Complexity profile ( LC ), Main profile and Scalable Sampling Rate profile ( SSR ).
AAC-LC profile consists of a base format very much like AT & T's Perceptual Audio Coding ( PAC ) coding format, with the addition of PQMF filterbank, with four shorter filterbanks following, in order to allow for scalable sampling rates.
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