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-
-/* -----------------------------------------------------------------------------------------------------------
-Software License for The Fraunhofer FDK AAC Codec Library for Android
-
-© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- All rights reserved.
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- 1. INTRODUCTION
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-the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
-This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
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-2. COPYRIGHT LICENSE
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------------------------------------------------------------------------------------------------------------ */
-
-/*!
-\file
-\brief Sbr scaling factors,
-To deal with the dynamic range in the different processing stages, a
-fixed point specific code has to rely on scaling factors. A floating
-point code carries a scaling factor -- the exponent -- for each value,
-so scaling is not necessary there.
-
-The output of the core decoder (low band) is scaled up to cover as much
-as possible bits for each value. As high band and low band are processed
-in different algorithm sections, they require their own scaling
-factors. In addition, any static buffers, e.g. filter states, require a
-separate scaling factor as well. The code takes care to do the proper
-adjustment, if scaling factors of a filter state and the time signal differ.
-
-\sa #QMF_SCALE_FACTOR, \ref documentationOverview
-*/
-
-#ifndef __SBR_SCALE_H
-#define __SBR_SCALE_H
-
-/*!
-\verbatim
- scale:
- 0 left aligned e.g. |max| >=0.5
- FRACT_BITS-1 zero e.g |max| = 0
-\endverbatim
-
- Dynamic scaling is used to achieve sufficient accuracy even when the signal
- energy is low. The dynamic framing of SBR produces a variable overlap area
- where samples from the previous QMF-Analysis are stored. Depending on the
- start position and stop position of the current SBR envelopes, the processing
- buffer consists of differently scaled regions like illustrated in the below
- figure.
-
- \image html scales.png Scale
-*/
-
-
-#endif