1 /********************************************************************
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
9 * by the Xiph.Org Foundation http://www.xiph.org/ *
11 ********************************************************************
13 function: masking curve data for psychoacoustics
14 last mod: $Id: masking.h 16227 2009-07-08 06:58:46Z xiphmont $
16 ********************************************************************/
21 /* more detailed ATH; the bass if flat to save stressing the floor
22 overly for only a bin or two of savings. */
25 static const float ATH
[]={
26 /*15*/ -51, -52, -53, -54, -55, -56, -57, -58,
27 /*31*/ -59, -60, -61, -62, -63, -64, -65, -66,
28 /*63*/ -67, -68, -69, -70, -71, -72, -73, -74,
29 /*125*/ -75, -76, -77, -78, -80, -81, -82, -83,
30 /*250*/ -84, -85, -86, -87, -88, -88, -89, -89,
31 /*500*/ -90, -91, -91, -92, -93, -94, -95, -96,
32 /*1k*/ -96, -97, -98, -98, -99, -99,-100,-100,
33 /*2k*/ -101,-102,-103,-104,-106,-107,-107,-107,
34 /*4k*/ -107,-105,-103,-102,-101, -99, -98, -96,
35 /*8k*/ -95, -95, -96, -97, -96, -95, -93, -90,
36 /*16k*/ -80, -70, -50, -40, -30, -30, -30, -30
39 /* The tone masking curves from Ehmer's and Fielder's papers have been
40 replaced by an empirically collected data set. The previously
41 published values were, far too often, simply on crack. */
43 #define EHMER_OFFSET 16
46 /* masking tones from -50 to 0dB, 62.5 through 16kHz at half octaves
47 test tones from -2 octaves to +5 octaves sampled at eighth octaves */
48 /* (Vorbis 0dB, the loudest possible tone, is assumed to be ~100dB SPL
49 for collection of these curves) */
51 static const float tonemasks
[P_BANDS
][6][EHMER_MAX
]={
53 {{ -60, -60, -60, -60, -60, -60, -60, -60,
54 -60, -60, -60, -60, -62, -62, -65, -73,
55 -69, -68, -68, -67, -70, -70, -72, -74,
56 -75, -79, -79, -80, -83, -88, -93, -100,
57 -110, -999, -999, -999, -999, -999, -999, -999,
58 -999, -999, -999, -999, -999, -999, -999, -999,
59 -999, -999, -999, -999, -999, -999, -999, -999},
60 { -48, -48, -48, -48, -48, -48, -48, -48,
61 -48, -48, -48, -48, -48, -53, -61, -66,
62 -66, -68, -67, -70, -76, -76, -72, -73,
63 -75, -76, -78, -79, -83, -88, -93, -100,
64 -110, -999, -999, -999, -999, -999, -999, -999,
65 -999, -999, -999, -999, -999, -999, -999, -999,
66 -999, -999, -999, -999, -999, -999, -999, -999},
67 { -37, -37, -37, -37, -37, -37, -37, -37,
68 -38, -40, -42, -46, -48, -53, -55, -62,
69 -65, -58, -56, -56, -61, -60, -65, -67,
70 -69, -71, -77, -77, -78, -80, -82, -84,
71 -88, -93, -98, -106, -112, -999, -999, -999,
72 -999, -999, -999, -999, -999, -999, -999, -999,
73 -999, -999, -999, -999, -999, -999, -999, -999},
74 { -25, -25, -25, -25, -25, -25, -25, -25,
75 -25, -26, -27, -29, -32, -38, -48, -52,
76 -52, -50, -48, -48, -51, -52, -54, -60,
77 -67, -67, -66, -68, -69, -73, -73, -76,
78 -80, -81, -81, -85, -85, -86, -88, -93,
79 -100, -110, -999, -999, -999, -999, -999, -999,
80 -999, -999, -999, -999, -999, -999, -999, -999},
81 { -16, -16, -16, -16, -16, -16, -16, -16,
82 -17, -19, -20, -22, -26, -28, -31, -40,
83 -47, -39, -39, -40, -42, -43, -47, -51,
84 -57, -52, -55, -55, -60, -58, -62, -63,
85 -70, -67, -69, -72, -73, -77, -80, -82,
86 -83, -87, -90, -94, -98, -104, -115, -999,
87 -999, -999, -999, -999, -999, -999, -999, -999},
88 { -8, -8, -8, -8, -8, -8, -8, -8,
89 -8, -8, -10, -11, -15, -19, -25, -30,
90 -34, -31, -30, -31, -29, -32, -35, -42,
91 -48, -42, -44, -46, -50, -50, -51, -52,
92 -59, -54, -55, -55, -58, -62, -63, -66,
93 -72, -73, -76, -75, -78, -80, -80, -81,
94 -84, -88, -90, -94, -98, -101, -106, -110}},
96 {{ -66, -66, -66, -66, -66, -66, -66, -66,
97 -66, -66, -66, -66, -66, -67, -67, -67,
98 -76, -72, -71, -74, -76, -76, -75, -78,
99 -79, -79, -81, -83, -86, -89, -93, -97,
100 -100, -105, -110, -999, -999, -999, -999, -999,
101 -999, -999, -999, -999, -999, -999, -999, -999,
102 -999, -999, -999, -999, -999, -999, -999, -999},
103 { -47, -47, -47, -47, -47, -47, -47, -47,
104 -47, -47, -47, -48, -51, -55, -59, -66,
105 -66, -66, -67, -66, -68, -69, -70, -74,
106 -79, -77, -77, -78, -80, -81, -82, -84,
107 -86, -88, -91, -95, -100, -108, -116, -999,
108 -999, -999, -999, -999, -999, -999, -999, -999,
109 -999, -999, -999, -999, -999, -999, -999, -999},
110 { -36, -36, -36, -36, -36, -36, -36, -36,
111 -36, -37, -37, -41, -44, -48, -51, -58,
112 -62, -60, -57, -59, -59, -60, -63, -65,
113 -72, -71, -70, -72, -74, -77, -76, -78,
114 -81, -81, -80, -83, -86, -91, -96, -100,
115 -105, -110, -999, -999, -999, -999, -999, -999,
116 -999, -999, -999, -999, -999, -999, -999, -999},
117 { -28, -28, -28, -28, -28, -28, -28, -28,
118 -28, -30, -32, -32, -33, -35, -41, -49,
119 -50, -49, -47, -48, -48, -52, -51, -57,
120 -65, -61, -59, -61, -64, -69, -70, -74,
121 -77, -77, -78, -81, -84, -85, -87, -90,
122 -92, -96, -100, -107, -112, -999, -999, -999,
123 -999, -999, -999, -999, -999, -999, -999, -999},
124 { -19, -19, -19, -19, -19, -19, -19, -19,
125 -20, -21, -23, -27, -30, -35, -36, -41,
126 -46, -44, -42, -40, -41, -41, -43, -48,
127 -55, -53, -52, -53, -56, -59, -58, -60,
128 -67, -66, -69, -71, -72, -75, -79, -81,
129 -84, -87, -90, -93, -97, -101, -107, -114,
130 -999, -999, -999, -999, -999, -999, -999, -999},
131 { -9, -9, -9, -9, -9, -9, -9, -9,
132 -11, -12, -12, -15, -16, -20, -23, -30,
133 -37, -34, -33, -34, -31, -32, -32, -38,
134 -47, -44, -41, -40, -47, -49, -46, -46,
135 -58, -50, -50, -54, -58, -62, -64, -67,
136 -67, -70, -72, -76, -79, -83, -87, -91,
137 -96, -100, -104, -110, -999, -999, -999, -999}},
139 {{ -62, -62, -62, -62, -62, -62, -62, -62,
140 -62, -62, -63, -64, -66, -67, -66, -68,
141 -75, -72, -76, -75, -76, -78, -79, -82,
142 -84, -85, -90, -94, -101, -110, -999, -999,
143 -999, -999, -999, -999, -999, -999, -999, -999,
144 -999, -999, -999, -999, -999, -999, -999, -999,
145 -999, -999, -999, -999, -999, -999, -999, -999},
146 { -59, -59, -59, -59, -59, -59, -59, -59,
147 -59, -59, -59, -60, -60, -61, -63, -66,
148 -71, -68, -70, -70, -71, -72, -72, -75,
149 -81, -78, -79, -82, -83, -86, -90, -97,
150 -103, -113, -999, -999, -999, -999, -999, -999,
151 -999, -999, -999, -999, -999, -999, -999, -999,
152 -999, -999, -999, -999, -999, -999, -999, -999},
153 { -53, -53, -53, -53, -53, -53, -53, -53,
154 -53, -54, -55, -57, -56, -57, -55, -61,
155 -65, -60, -60, -62, -63, -63, -66, -68,
156 -74, -73, -75, -75, -78, -80, -80, -82,
157 -85, -90, -96, -101, -108, -999, -999, -999,
158 -999, -999, -999, -999, -999, -999, -999, -999,
159 -999, -999, -999, -999, -999, -999, -999, -999},
160 { -46, -46, -46, -46, -46, -46, -46, -46,
161 -46, -46, -47, -47, -47, -47, -48, -51,
162 -57, -51, -49, -50, -51, -53, -54, -59,
163 -66, -60, -62, -67, -67, -70, -72, -75,
164 -76, -78, -81, -85, -88, -94, -97, -104,
165 -112, -999, -999, -999, -999, -999, -999, -999,
166 -999, -999, -999, -999, -999, -999, -999, -999},
167 { -36, -36, -36, -36, -36, -36, -36, -36,
168 -39, -41, -42, -42, -39, -38, -41, -43,
169 -52, -44, -40, -39, -37, -37, -40, -47,
170 -54, -50, -48, -50, -55, -61, -59, -62,
171 -66, -66, -66, -69, -69, -73, -74, -74,
172 -75, -77, -79, -82, -87, -91, -95, -100,
173 -108, -115, -999, -999, -999, -999, -999, -999},
174 { -28, -26, -24, -22, -20, -20, -23, -29,
175 -30, -31, -28, -27, -28, -28, -28, -35,
176 -40, -33, -32, -29, -30, -30, -30, -37,
177 -45, -41, -37, -38, -45, -47, -47, -48,
178 -53, -49, -48, -50, -49, -49, -51, -52,
179 -58, -56, -57, -56, -60, -61, -62, -70,
180 -72, -74, -78, -83, -88, -93, -100, -106}},
182 {{-999, -999, -999, -999, -999, -999, -999, -999,
183 -999, -110, -105, -100, -95, -91, -87, -83,
184 -80, -78, -76, -78, -78, -81, -83, -85,
185 -86, -85, -86, -87, -90, -97, -107, -999,
186 -999, -999, -999, -999, -999, -999, -999, -999,
187 -999, -999, -999, -999, -999, -999, -999, -999,
188 -999, -999, -999, -999, -999, -999, -999, -999},
189 {-999, -999, -999, -110, -105, -100, -95, -90,
190 -85, -81, -77, -73, -70, -67, -67, -68,
191 -75, -73, -70, -69, -70, -72, -75, -79,
192 -84, -83, -84, -86, -88, -89, -89, -93,
193 -98, -105, -112, -999, -999, -999, -999, -999,
194 -999, -999, -999, -999, -999, -999, -999, -999,
195 -999, -999, -999, -999, -999, -999, -999, -999},
196 {-105, -100, -95, -90, -85, -80, -76, -71,
197 -68, -68, -65, -63, -63, -62, -62, -64,
198 -65, -64, -61, -62, -63, -64, -66, -68,
199 -73, -73, -74, -75, -76, -81, -83, -85,
200 -88, -89, -92, -95, -100, -108, -999, -999,
201 -999, -999, -999, -999, -999, -999, -999, -999,
202 -999, -999, -999, -999, -999, -999, -999, -999},
203 { -80, -75, -71, -68, -65, -63, -62, -61,
204 -61, -61, -61, -59, -56, -57, -53, -50,
205 -58, -52, -50, -50, -52, -53, -54, -58,
206 -67, -63, -67, -68, -72, -75, -78, -80,
207 -81, -81, -82, -85, -89, -90, -93, -97,
208 -101, -107, -114, -999, -999, -999, -999, -999,
209 -999, -999, -999, -999, -999, -999, -999, -999},
210 { -65, -61, -59, -57, -56, -55, -55, -56,
211 -56, -57, -55, -53, -52, -47, -44, -44,
212 -50, -44, -41, -39, -39, -42, -40, -46,
213 -51, -49, -50, -53, -54, -63, -60, -61,
214 -62, -66, -66, -66, -70, -73, -74, -75,
215 -76, -75, -79, -85, -89, -91, -96, -102,
216 -110, -999, -999, -999, -999, -999, -999, -999},
217 { -52, -50, -49, -49, -48, -48, -48, -49,
218 -50, -50, -49, -46, -43, -39, -35, -33,
219 -38, -36, -32, -29, -32, -32, -32, -35,
220 -44, -39, -38, -38, -46, -50, -45, -46,
221 -53, -50, -50, -50, -54, -54, -53, -53,
222 -56, -57, -59, -66, -70, -72, -74, -79,
223 -83, -85, -90, -97, -114, -999, -999, -999}},
225 {{-999, -999, -999, -999, -999, -999, -110, -105,
226 -100, -95, -90, -86, -80, -75, -75, -79,
227 -80, -79, -80, -81, -82, -88, -95, -103,
228 -110, -999, -999, -999, -999, -999, -999, -999,
229 -999, -999, -999, -999, -999, -999, -999, -999,
230 -999, -999, -999, -999, -999, -999, -999, -999,
231 -999, -999, -999, -999, -999, -999, -999, -999},
232 {-999, -999, -999, -999, -108, -103, -98, -93,
233 -88, -83, -79, -78, -75, -71, -67, -68,
234 -73, -73, -72, -73, -75, -77, -80, -82,
235 -88, -93, -100, -107, -114, -999, -999, -999,
236 -999, -999, -999, -999, -999, -999, -999, -999,
237 -999, -999, -999, -999, -999, -999, -999, -999,
238 -999, -999, -999, -999, -999, -999, -999, -999},
239 {-999, -999, -999, -110, -105, -101, -96, -90,
240 -86, -81, -77, -73, -69, -66, -61, -62,
241 -66, -64, -62, -65, -66, -70, -72, -76,
242 -81, -80, -84, -90, -95, -102, -110, -999,
243 -999, -999, -999, -999, -999, -999, -999, -999,
244 -999, -999, -999, -999, -999, -999, -999, -999,
245 -999, -999, -999, -999, -999, -999, -999, -999},
246 {-999, -999, -999, -107, -103, -97, -92, -88,
247 -83, -79, -74, -70, -66, -59, -53, -58,
248 -62, -55, -54, -54, -54, -58, -61, -62,
249 -72, -70, -72, -75, -78, -80, -81, -80,
250 -83, -83, -88, -93, -100, -107, -115, -999,
251 -999, -999, -999, -999, -999, -999, -999, -999,
252 -999, -999, -999, -999, -999, -999, -999, -999},
253 {-999, -999, -999, -105, -100, -95, -90, -85,
254 -80, -75, -70, -66, -62, -56, -48, -44,
255 -48, -46, -46, -43, -46, -48, -48, -51,
256 -58, -58, -59, -60, -62, -62, -61, -61,
257 -65, -64, -65, -68, -70, -74, -75, -78,
258 -81, -86, -95, -110, -999, -999, -999, -999,
259 -999, -999, -999, -999, -999, -999, -999, -999},
260 {-999, -999, -105, -100, -95, -90, -85, -80,
261 -75, -70, -65, -61, -55, -49, -39, -33,
262 -40, -35, -32, -38, -40, -33, -35, -37,
263 -46, -41, -45, -44, -46, -42, -45, -46,
264 -52, -50, -50, -50, -54, -54, -55, -57,
265 -62, -64, -66, -68, -70, -76, -81, -90,
266 -100, -110, -999, -999, -999, -999, -999, -999}},
268 {{-999, -999, -999, -999, -999, -999, -999, -999,
269 -105, -98, -90, -85, -82, -83, -80, -78,
270 -84, -79, -80, -83, -87, -89, -91, -93,
271 -99, -106, -117, -999, -999, -999, -999, -999,
272 -999, -999, -999, -999, -999, -999, -999, -999,
273 -999, -999, -999, -999, -999, -999, -999, -999,
274 -999, -999, -999, -999, -999, -999, -999, -999},
275 {-999, -999, -999, -999, -999, -999, -999, -999,
276 -105, -98, -90, -85, -80, -75, -70, -68,
277 -74, -72, -74, -77, -80, -82, -85, -87,
278 -92, -89, -91, -95, -100, -106, -112, -999,
279 -999, -999, -999, -999, -999, -999, -999, -999,
280 -999, -999, -999, -999, -999, -999, -999, -999,
281 -999, -999, -999, -999, -999, -999, -999, -999},
282 {-999, -999, -999, -999, -999, -999, -999, -999,
283 -105, -98, -90, -83, -75, -71, -63, -64,
284 -67, -62, -64, -67, -70, -73, -77, -81,
285 -84, -83, -85, -89, -90, -93, -98, -104,
286 -109, -114, -999, -999, -999, -999, -999, -999,
287 -999, -999, -999, -999, -999, -999, -999, -999,
288 -999, -999, -999, -999, -999, -999, -999, -999},
289 {-999, -999, -999, -999, -999, -999, -999, -999,
290 -103, -96, -88, -81, -75, -68, -58, -54,
291 -56, -54, -56, -56, -58, -60, -63, -66,
292 -74, -69, -72, -72, -75, -74, -77, -81,
293 -81, -82, -84, -87, -93, -96, -99, -104,
294 -110, -999, -999, -999, -999, -999, -999, -999,
295 -999, -999, -999, -999, -999, -999, -999, -999},
296 {-999, -999, -999, -999, -999, -108, -102, -96,
297 -91, -85, -80, -74, -68, -60, -51, -46,
298 -48, -46, -43, -45, -47, -47, -49, -48,
299 -56, -53, -55, -58, -57, -63, -58, -60,
300 -66, -64, -67, -70, -70, -74, -77, -84,
301 -86, -89, -91, -93, -94, -101, -109, -118,
302 -999, -999, -999, -999, -999, -999, -999, -999},
303 {-999, -999, -999, -108, -103, -98, -93, -88,
304 -83, -78, -73, -68, -60, -53, -44, -35,
305 -38, -38, -34, -34, -36, -40, -41, -44,
306 -51, -45, -46, -47, -46, -54, -50, -49,
307 -50, -50, -50, -51, -54, -57, -58, -60,
308 -66, -66, -66, -64, -65, -68, -77, -82,
309 -87, -95, -110, -999, -999, -999, -999, -999}},
311 {{-999, -999, -999, -999, -999, -999, -999, -999,
312 -107, -102, -97, -92, -87, -83, -78, -75,
313 -82, -79, -83, -85, -89, -92, -95, -98,
314 -101, -105, -109, -113, -999, -999, -999, -999,
315 -999, -999, -999, -999, -999, -999, -999, -999,
316 -999, -999, -999, -999, -999, -999, -999, -999,
317 -999, -999, -999, -999, -999, -999, -999, -999},
318 {-999, -999, -999, -999, -999, -999, -999, -106,
319 -100, -95, -90, -86, -81, -78, -74, -69,
320 -74, -74, -76, -79, -83, -84, -86, -89,
321 -92, -97, -93, -100, -103, -107, -110, -999,
322 -999, -999, -999, -999, -999, -999, -999, -999,
323 -999, -999, -999, -999, -999, -999, -999, -999,
324 -999, -999, -999, -999, -999, -999, -999, -999},
325 {-999, -999, -999, -999, -999, -999, -106, -100,
326 -95, -90, -87, -83, -80, -75, -69, -60,
327 -66, -66, -68, -70, -74, -78, -79, -81,
328 -81, -83, -84, -87, -93, -96, -99, -103,
329 -107, -110, -999, -999, -999, -999, -999, -999,
330 -999, -999, -999, -999, -999, -999, -999, -999,
331 -999, -999, -999, -999, -999, -999, -999, -999},
332 {-999, -999, -999, -999, -999, -108, -103, -98,
333 -93, -89, -85, -82, -78, -71, -62, -55,
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