?? common.m
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% This sets the `global' variables use in the other functions.
% They correspond to MPEG audio layer I with psychoacoustic model 1
% as described in [1].
%
% See also
% Author: Fabien A. P. Petitcolas
% Computer Laboratory
% University of Cambridge
%
% Copyright (c) 1998--2001 by Fabien A. P. Petitcolas
% $Header: /Matlab MPEG/Common.m 3 7/07/01 1:27 Fabienpe $
% $Id: Common.m,v 1.4 1998-07-07 14:39:54+01 fapp2 Exp $
% References:
% [1] Information technology -- Coding of moving pictures and associated
% audio for digital storage media at up to 1,5 Mbits/s -- Part3: audio.
% British standard. BSI, London. October 1993. Implementation of ISO/IEC
% 11172-3:1993. BSI, London. First edition 1993-08-01.
%
% Legal notice:
% This computer program is based on ISO/IEC 11172-3:1993, Information
% technology -- Coding of moving pictures and associated audio for digital
% storage media at up to about 1,5 Mbit/s -- Part 3: Audio, with the
% permission of ISO. Copies of this standards can be purchased from the
% British Standards Institution, 389 Chiswick High Road, GB-London W4 4AL,
% Telephone:+ 44 181 996 90 00, Telefax:+ 44 181 996 74 00 or from ISO,
% postal box 56, CH-1211 Geneva 20, Telephone +41 22 749 0111, Telefax
% +4122 734 1079. Copyright remains with ISO.
%-------------------------------------------------------------------------------
FFT_SHIFT = 384;
FFT_SIZE = 512;
FFT_OVERLAP = (FFT_SIZE - FFT_SHIFT) / 2;
N_SUBBAND = 32;
% Flags for tonal analysis
NOT_EXAMINED = 0;
TONAL = 1;
NON_TONAL = 2;
IRRELEVANT = 3;
MIN_POWER = -200;
% Set to one to see the graphs and explanation text
DRAW = 1;
% Indices used in tables like the threshold table
% or in the list of tonal and non-tonal components.
INDEX = 1;
BARK = 2;
SPL = 2;
ATH = 3;
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