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27 lines
1.1 KiB
27 lines
1.1 KiB
6 years ago
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function [S, sfc, G] = AACquantizer(frameF, frameType, SMR)
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%Implementation of Quantizer
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% Usage [S, sfc, G] = AACquantizer(frameF, frameType, SMR), where:
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% Inputs
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% - frameF is the frame in the frequency domain, in MDCT coefficients
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% representation containing only one of the audio channels stored in
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% a vector of length 1024
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% - frameType is the type of the current frame in string
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% representation, can be one of "OLS" (ONLY_LONG_SEQUENCE), "LSS"
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% (LONG_START_SEQUENCE), "ESH" (EIGHT_SHORT_SEQUENCE), "LPS"
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% (LONG_STOP_SEQUENCE)
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% - SMR is the signal to mask ratio array of dimensions 42X8 for
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% EIGHT_SHORT_SEQUENCE frames and 69X1 otherwise
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%
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% Output
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% - S are the MDCT quantization symbols of one audio channel stored
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% in a vector of length 1024
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% - sfc are the scalefactors per band stored in an array of
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% dimensions NBX8 for EIGHT_SHORT_SEQUENCE frames and NBX1
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% otherwise, where NB is the number of bands
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% - G is the global gain stored in an array of dimensions 1X8 for
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% EIGHT_SHORT_SEQUENCE frames and a single value otherwise
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end
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