1/* 2 * SIPR / ACELP.NET decoder 3 * 4 * Copyright (c) 2008 Vladimir Voroshilov 5 * Copyright (c) 2009 Vitor Sessak 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#include <math.h> 25#include <stdint.h> 26 27#include "libavutil/mathematics.h" 28#include "avcodec.h" 29#define ALT_BITSTREAM_READER_LE 30#include "get_bits.h" 31#include "dsputil.h" 32 33#include "lsp.h" 34#include "celp_math.h" 35#include "acelp_vectors.h" 36#include "acelp_pitch_delay.h" 37#include "acelp_filters.h" 38#include "celp_filters.h" 39 40#define MAX_SUBFRAME_COUNT 5 41 42#include "sipr.h" 43#include "siprdata.h" 44 45typedef struct { 46 const char *mode_name; 47 uint16_t bits_per_frame; 48 uint8_t subframe_count; 49 uint8_t frames_per_packet; 50 float pitch_sharp_factor; 51 52 /* bitstream parameters */ 53 uint8_t number_of_fc_indexes; 54 uint8_t ma_predictor_bits; ///< size in bits of the switched MA predictor 55 56 /** size in bits of the i-th stage vector of quantizer */ 57 uint8_t vq_indexes_bits[5]; 58 59 /** size in bits of the adaptive-codebook index for every subframe */ 60 uint8_t pitch_delay_bits[5]; 61 62 uint8_t gp_index_bits; 63 uint8_t fc_index_bits[10]; ///< size in bits of the fixed codebook indexes 64 uint8_t gc_index_bits; ///< size in bits of the gain codebook indexes 65} SiprModeParam; 66 67static const SiprModeParam modes[MODE_COUNT] = { 68 [MODE_16k] = { 69 .mode_name = "16k", 70 .bits_per_frame = 160, 71 .subframe_count = SUBFRAME_COUNT_16k, 72 .frames_per_packet = 1, 73 .pitch_sharp_factor = 0.00, 74 75 .number_of_fc_indexes = 10, 76 .ma_predictor_bits = 1, 77 .vq_indexes_bits = {7, 8, 7, 7, 7}, 78 .pitch_delay_bits = {9, 6}, 79 .gp_index_bits = 4, 80 .fc_index_bits = {4, 5, 4, 5, 4, 5, 4, 5, 4, 5}, 81 .gc_index_bits = 5 82 }, 83 84 [MODE_8k5] = { 85 .mode_name = "8k5", 86 .bits_per_frame = 152, 87 .subframe_count = 3, 88 .frames_per_packet = 1, 89 .pitch_sharp_factor = 0.8, 90 91 .number_of_fc_indexes = 3, 92 .ma_predictor_bits = 0, 93 .vq_indexes_bits = {6, 7, 7, 7, 5}, 94 .pitch_delay_bits = {8, 5, 5}, 95 .gp_index_bits = 0, 96 .fc_index_bits = {9, 9, 9}, 97 .gc_index_bits = 7 98 }, 99 100 [MODE_6k5] = { 101 .mode_name = "6k5", 102 .bits_per_frame = 232, 103 .subframe_count = 3, 104 .frames_per_packet = 2, 105 .pitch_sharp_factor = 0.8, 106 107 .number_of_fc_indexes = 3, 108 .ma_predictor_bits = 0, 109 .vq_indexes_bits = {6, 7, 7, 7, 5}, 110 .pitch_delay_bits = {8, 5, 5}, 111 .gp_index_bits = 0, 112 .fc_index_bits = {5, 5, 5}, 113 .gc_index_bits = 7 114 }, 115 116 [MODE_5k0] = { 117 .mode_name = "5k0", 118 .bits_per_frame = 296, 119 .subframe_count = 5, 120 .frames_per_packet = 2, 121 .pitch_sharp_factor = 0.85, 122 123 .number_of_fc_indexes = 1, 124 .ma_predictor_bits = 0, 125 .vq_indexes_bits = {6, 7, 7, 7, 5}, 126 .pitch_delay_bits = {8, 5, 8, 5, 5}, 127 .gp_index_bits = 0, 128 .fc_index_bits = {10}, 129 .gc_index_bits = 7 130 } 131}; 132 133const float ff_pow_0_5[] = { 134 1.0/(1 << 1), 1.0/(1 << 2), 1.0/(1 << 3), 1.0/(1 << 4), 135 1.0/(1 << 5), 1.0/(1 << 6), 1.0/(1 << 7), 1.0/(1 << 8), 136 1.0/(1 << 9), 1.0/(1 << 10), 1.0/(1 << 11), 1.0/(1 << 12), 137 1.0/(1 << 13), 1.0/(1 << 14), 1.0/(1 << 15), 1.0/(1 << 16) 138}; 139 140static void dequant(float *out, const int *idx, const float *cbs[]) 141{ 142 int i; 143 int stride = 2; 144 int num_vec = 5; 145 146 for (i = 0; i < num_vec; i++) 147 memcpy(out + stride*i, cbs[i] + stride*idx[i], stride*sizeof(float)); 148 149} 150 151static void lsf_decode_fp(float *lsfnew, float *lsf_history, 152 const SiprParameters *parm) 153{ 154 int i; 155 float lsf_tmp[LP_FILTER_ORDER]; 156 157 dequant(lsf_tmp, parm->vq_indexes, lsf_codebooks); 158 159 for (i = 0; i < LP_FILTER_ORDER; i++) 160 lsfnew[i] = lsf_history[i] * 0.33 + lsf_tmp[i] + mean_lsf[i]; 161 162 ff_sort_nearly_sorted_floats(lsfnew, LP_FILTER_ORDER - 1); 163 164 /* Note that a minimum distance is not enforced between the last value and 165 the previous one, contrary to what is done in ff_acelp_reorder_lsf() */ 166 ff_set_min_dist_lsf(lsfnew, LSFQ_DIFF_MIN, LP_FILTER_ORDER - 1); 167 lsfnew[9] = FFMIN(lsfnew[LP_FILTER_ORDER - 1], 1.3 * M_PI); 168 169 memcpy(lsf_history, lsf_tmp, LP_FILTER_ORDER * sizeof(*lsf_history)); 170 171 for (i = 0; i < LP_FILTER_ORDER - 1; i++) 172 lsfnew[i] = cos(lsfnew[i]); 173 lsfnew[LP_FILTER_ORDER - 1] *= 6.153848 / M_PI; 174} 175 176/** Apply pitch lag to the fixed vector (AMR section 6.1.2). */ 177static void pitch_sharpening(int pitch_lag_int, float beta, 178 float *fixed_vector) 179{ 180 int i; 181 182 for (i = pitch_lag_int; i < SUBFR_SIZE; i++) 183 fixed_vector[i] += beta * fixed_vector[i - pitch_lag_int]; 184} 185 186/** 187 * Extracts decoding parameters from the input bitstream. 188 * @param parms parameters structure 189 * @param pgb pointer to initialized GetBitContext structure 190 */ 191static void decode_parameters(SiprParameters* parms, GetBitContext *pgb, 192 const SiprModeParam *p) 193{ 194 int i, j; 195 196 parms->ma_pred_switch = get_bits(pgb, p->ma_predictor_bits); 197 198 for (i = 0; i < 5; i++) 199 parms->vq_indexes[i] = get_bits(pgb, p->vq_indexes_bits[i]); 200 201 for (i = 0; i < p->subframe_count; i++) { 202 parms->pitch_delay[i] = get_bits(pgb, p->pitch_delay_bits[i]); 203 parms->gp_index[i] = get_bits(pgb, p->gp_index_bits); 204 205 for (j = 0; j < p->number_of_fc_indexes; j++) 206 parms->fc_indexes[i][j] = get_bits(pgb, p->fc_index_bits[j]); 207 208 parms->gc_index[i] = get_bits(pgb, p->gc_index_bits); 209 } 210} 211 212static void lsp2lpc_sipr(const double *lsp, float *Az) 213{ 214 int lp_half_order = LP_FILTER_ORDER >> 1; 215 double buf[(LP_FILTER_ORDER >> 1) + 1]; 216 double pa[(LP_FILTER_ORDER >> 1) + 1]; 217 double *qa = buf + 1; 218 int i,j; 219 220 qa[-1] = 0.0; 221 222 ff_lsp2polyf(lsp , pa, lp_half_order ); 223 ff_lsp2polyf(lsp + 1, qa, lp_half_order - 1); 224 225 for (i = 1, j = LP_FILTER_ORDER - 1; i < lp_half_order; i++, j--) { 226 double paf = pa[i] * (1 + lsp[LP_FILTER_ORDER - 1]); 227 double qaf = (qa[i] - qa[i-2]) * (1 - lsp[LP_FILTER_ORDER - 1]); 228 Az[i-1] = (paf + qaf) * 0.5; 229 Az[j-1] = (paf - qaf) * 0.5; 230 } 231 232 Az[lp_half_order - 1] = (1.0 + lsp[LP_FILTER_ORDER - 1]) * 233 pa[lp_half_order] * 0.5; 234 235 Az[LP_FILTER_ORDER - 1] = lsp[LP_FILTER_ORDER - 1]; 236} 237 238static void sipr_decode_lp(float *lsfnew, const float *lsfold, float *Az, 239 int num_subfr) 240{ 241 double lsfint[LP_FILTER_ORDER]; 242 int i,j; 243 float t, t0 = 1.0 / num_subfr; 244 245 t = t0 * 0.5; 246 for (i = 0; i < num_subfr; i++) { 247 for (j = 0; j < LP_FILTER_ORDER; j++) 248 lsfint[j] = lsfold[j] * (1 - t) + t * lsfnew[j]; 249 250 lsp2lpc_sipr(lsfint, Az); 251 Az += LP_FILTER_ORDER; 252 t += t0; 253 } 254} 255 256/** 257 * Evaluates the adaptive impulse response. 258 */ 259static void eval_ir(const float *Az, int pitch_lag, float *freq, 260 float pitch_sharp_factor) 261{ 262 float tmp1[SUBFR_SIZE+1], tmp2[LP_FILTER_ORDER+1]; 263 int i; 264 265 tmp1[0] = 1.; 266 for (i = 0; i < LP_FILTER_ORDER; i++) { 267 tmp1[i+1] = Az[i] * ff_pow_0_55[i]; 268 tmp2[i ] = Az[i] * ff_pow_0_7 [i]; 269 } 270 memset(tmp1 + 11, 0, 37 * sizeof(float)); 271 272 ff_celp_lp_synthesis_filterf(freq, tmp2, tmp1, SUBFR_SIZE, 273 LP_FILTER_ORDER); 274 275 pitch_sharpening(pitch_lag, pitch_sharp_factor, freq); 276} 277 278/** 279 * Evaluates the convolution of a vector with a sparse vector. 280 */ 281static void convolute_with_sparse(float *out, const AMRFixed *pulses, 282 const float *shape, int length) 283{ 284 int i, j; 285 286 memset(out, 0, length*sizeof(float)); 287 for (i = 0; i < pulses->n; i++) 288 for (j = pulses->x[i]; j < length; j++) 289 out[j] += pulses->y[i] * shape[j - pulses->x[i]]; 290} 291 292/** 293 * Apply postfilter, very similar to AMR one. 294 */ 295static void postfilter_5k0(SiprContext *ctx, const float *lpc, float *samples) 296{ 297 float buf[SUBFR_SIZE + LP_FILTER_ORDER]; 298 float *pole_out = buf + LP_FILTER_ORDER; 299 float lpc_n[LP_FILTER_ORDER]; 300 float lpc_d[LP_FILTER_ORDER]; 301 int i; 302 303 for (i = 0; i < LP_FILTER_ORDER; i++) { 304 lpc_d[i] = lpc[i] * ff_pow_0_75[i]; 305 lpc_n[i] = lpc[i] * ff_pow_0_5 [i]; 306 }; 307 308 memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem, 309 LP_FILTER_ORDER*sizeof(float)); 310 311 ff_celp_lp_synthesis_filterf(pole_out, lpc_d, samples, SUBFR_SIZE, 312 LP_FILTER_ORDER); 313 314 memcpy(ctx->postfilter_mem, pole_out + SUBFR_SIZE - LP_FILTER_ORDER, 315 LP_FILTER_ORDER*sizeof(float)); 316 317 ff_tilt_compensation(&ctx->tilt_mem, 0.4, pole_out, SUBFR_SIZE); 318 319 memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem5k0, 320 LP_FILTER_ORDER*sizeof(*pole_out)); 321 322 memcpy(ctx->postfilter_mem5k0, pole_out + SUBFR_SIZE - LP_FILTER_ORDER, 323 LP_FILTER_ORDER*sizeof(*pole_out)); 324 325 ff_celp_lp_zero_synthesis_filterf(samples, lpc_n, pole_out, SUBFR_SIZE, 326 LP_FILTER_ORDER); 327 328} 329 330static void decode_fixed_sparse(AMRFixed *fixed_sparse, const int16_t *pulses, 331 SiprMode mode, int low_gain) 332{ 333 int i; 334 335 switch (mode) { 336 case MODE_6k5: 337 for (i = 0; i < 3; i++) { 338 fixed_sparse->x[i] = 3 * (pulses[i] & 0xf) + i; 339 fixed_sparse->y[i] = pulses[i] & 0x10 ? -1 : 1; 340 } 341 fixed_sparse->n = 3; 342 break; 343 case MODE_8k5: 344 for (i = 0; i < 3; i++) { 345 fixed_sparse->x[2*i ] = 3 * ((pulses[i] >> 4) & 0xf) + i; 346 fixed_sparse->x[2*i + 1] = 3 * ( pulses[i] & 0xf) + i; 347 348 fixed_sparse->y[2*i ] = (pulses[i] & 0x100) ? -1.0: 1.0; 349 350 fixed_sparse->y[2*i + 1] = 351 (fixed_sparse->x[2*i + 1] < fixed_sparse->x[2*i]) ? 352 -fixed_sparse->y[2*i ] : fixed_sparse->y[2*i]; 353 } 354 355 fixed_sparse->n = 6; 356 break; 357 case MODE_5k0: 358 default: 359 if (low_gain) { 360 int offset = (pulses[0] & 0x200) ? 2 : 0; 361 int val = pulses[0]; 362 363 for (i = 0; i < 3; i++) { 364 int index = (val & 0x7) * 6 + 4 - i*2; 365 366 fixed_sparse->y[i] = (offset + index) & 0x3 ? -1 : 1; 367 fixed_sparse->x[i] = index; 368 369 val >>= 3; 370 } 371 fixed_sparse->n = 3; 372 } else { 373 int pulse_subset = (pulses[0] >> 8) & 1; 374 375 fixed_sparse->x[0] = ((pulses[0] >> 4) & 15) * 3 + pulse_subset; 376 fixed_sparse->x[1] = ( pulses[0] & 15) * 3 + pulse_subset + 1; 377 378 fixed_sparse->y[0] = pulses[0] & 0x200 ? -1 : 1; 379 fixed_sparse->y[1] = -fixed_sparse->y[0]; 380 fixed_sparse->n = 2; 381 } 382 break; 383 } 384} 385 386static void decode_frame(SiprContext *ctx, SiprParameters *params, 387 float *out_data) 388{ 389 int i, j; 390 int subframe_count = modes[ctx->mode].subframe_count; 391 int frame_size = subframe_count * SUBFR_SIZE; 392 float Az[LP_FILTER_ORDER * MAX_SUBFRAME_COUNT]; 393 float *excitation; 394 float ir_buf[SUBFR_SIZE + LP_FILTER_ORDER]; 395 float lsf_new[LP_FILTER_ORDER]; 396 float *impulse_response = ir_buf + LP_FILTER_ORDER; 397 float *synth = ctx->synth_buf + 16; // 16 instead of LP_FILTER_ORDER for 398 // memory alignment 399 int t0_first = 0; 400 AMRFixed fixed_cb; 401 402 memset(ir_buf, 0, LP_FILTER_ORDER * sizeof(float)); 403 lsf_decode_fp(lsf_new, ctx->lsf_history, params); 404 405 sipr_decode_lp(lsf_new, ctx->lsp_history, Az, subframe_count); 406 407 memcpy(ctx->lsp_history, lsf_new, LP_FILTER_ORDER * sizeof(float)); 408 409 excitation = ctx->excitation + PITCH_DELAY_MAX + L_INTERPOL; 410 411 for (i = 0; i < subframe_count; i++) { 412 float *pAz = Az + i*LP_FILTER_ORDER; 413 float fixed_vector[SUBFR_SIZE]; 414 int T0,T0_frac; 415 float pitch_gain, gain_code, avg_energy; 416 417 ff_decode_pitch_lag(&T0, &T0_frac, params->pitch_delay[i], t0_first, i, 418 ctx->mode == MODE_5k0, 6); 419 420 if (i == 0 || (i == 2 && ctx->mode == MODE_5k0)) 421 t0_first = T0; 422 423 ff_acelp_interpolatef(excitation, excitation - T0 + (T0_frac <= 0), 424 ff_b60_sinc, 6, 425 2 * ((2 + T0_frac)%3 + 1), LP_FILTER_ORDER, 426 SUBFR_SIZE); 427 428 decode_fixed_sparse(&fixed_cb, params->fc_indexes[i], ctx->mode, 429 ctx->past_pitch_gain < 0.8); 430 431 eval_ir(pAz, T0, impulse_response, modes[ctx->mode].pitch_sharp_factor); 432 433 convolute_with_sparse(fixed_vector, &fixed_cb, impulse_response, 434 SUBFR_SIZE); 435 436 avg_energy = 437 (0.01 + ff_dot_productf(fixed_vector, fixed_vector, SUBFR_SIZE))/ 438 SUBFR_SIZE; 439 440 ctx->past_pitch_gain = pitch_gain = gain_cb[params->gc_index[i]][0]; 441 442 gain_code = ff_amr_set_fixed_gain(gain_cb[params->gc_index[i]][1], 443 avg_energy, ctx->energy_history, 444 34 - 15.0/(0.05*M_LN10/M_LN2), 445 pred); 446 447 ff_weighted_vector_sumf(excitation, excitation, fixed_vector, 448 pitch_gain, gain_code, SUBFR_SIZE); 449 450 pitch_gain *= 0.5 * pitch_gain; 451 pitch_gain = FFMIN(pitch_gain, 0.4); 452 453 ctx->gain_mem = 0.7 * ctx->gain_mem + 0.3 * pitch_gain; 454 ctx->gain_mem = FFMIN(ctx->gain_mem, pitch_gain); 455 gain_code *= ctx->gain_mem; 456 457 for (j = 0; j < SUBFR_SIZE; j++) 458 fixed_vector[j] = excitation[j] - gain_code * fixed_vector[j]; 459 460 if (ctx->mode == MODE_5k0) { 461 postfilter_5k0(ctx, pAz, fixed_vector); 462 463 ff_celp_lp_synthesis_filterf(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE, 464 pAz, excitation, SUBFR_SIZE, 465 LP_FILTER_ORDER); 466 } 467 468 ff_celp_lp_synthesis_filterf(synth + i*SUBFR_SIZE, pAz, fixed_vector, 469 SUBFR_SIZE, LP_FILTER_ORDER); 470 471 excitation += SUBFR_SIZE; 472 } 473 474 memcpy(synth - LP_FILTER_ORDER, synth + frame_size - LP_FILTER_ORDER, 475 LP_FILTER_ORDER * sizeof(float)); 476 477 if (ctx->mode == MODE_5k0) { 478 for (i = 0; i < subframe_count; i++) { 479 float energy = ff_dot_productf(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE, 480 ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE, 481 SUBFR_SIZE); 482 ff_adaptive_gain_control(&synth[i * SUBFR_SIZE], 483 &synth[i * SUBFR_SIZE], energy, 484 SUBFR_SIZE, 0.9, &ctx->postfilter_agc); 485 } 486 487 memcpy(ctx->postfilter_syn5k0, ctx->postfilter_syn5k0 + frame_size, 488 LP_FILTER_ORDER*sizeof(float)); 489 } 490 memcpy(ctx->excitation, excitation - PITCH_DELAY_MAX - L_INTERPOL, 491 (PITCH_DELAY_MAX + L_INTERPOL) * sizeof(float)); 492 493 ff_acelp_apply_order_2_transfer_function(out_data, synth, 494 (const float[2]) {-1.99997 , 1.000000000}, 495 (const float[2]) {-1.93307352, 0.935891986}, 496 0.939805806, 497 ctx->highpass_filt_mem, 498 frame_size); 499} 500 501static av_cold int sipr_decoder_init(AVCodecContext * avctx) 502{ 503 SiprContext *ctx = avctx->priv_data; 504 int i; 505 506 if (avctx->bit_rate > 12200) ctx->mode = MODE_16k; 507 else if (avctx->bit_rate > 7500 ) ctx->mode = MODE_8k5; 508 else if (avctx->bit_rate > 5750 ) ctx->mode = MODE_6k5; 509 else ctx->mode = MODE_5k0; 510 511 av_log(avctx, AV_LOG_DEBUG, "Mode: %s\n", modes[ctx->mode].mode_name); 512 513 if (ctx->mode == MODE_16k) 514 ff_sipr_init_16k(ctx); 515 516 for (i = 0; i < LP_FILTER_ORDER; i++) 517 ctx->lsp_history[i] = cos((i+1) * M_PI / (LP_FILTER_ORDER + 1)); 518 519 for (i = 0; i < 4; i++) 520 ctx->energy_history[i] = -14; 521 522 avctx->sample_fmt = SAMPLE_FMT_FLT; 523 524 dsputil_init(&ctx->dsp, avctx); 525 526 return 0; 527} 528 529static int sipr_decode_frame(AVCodecContext *avctx, void *datap, 530 int *data_size, AVPacket *avpkt) 531{ 532 SiprContext *ctx = avctx->priv_data; 533 const uint8_t *buf=avpkt->data; 534 SiprParameters parm; 535 const SiprModeParam *mode_par = &modes[ctx->mode]; 536 GetBitContext gb; 537 float *data = datap; 538 int subframe_size = ctx->mode == MODE_16k ? L_SUBFR_16k : SUBFR_SIZE; 539 int i; 540 541 ctx->avctx = avctx; 542 if (avpkt->size < (mode_par->bits_per_frame >> 3)) { 543 av_log(avctx, AV_LOG_ERROR, 544 "Error processing packet: packet size (%d) too small\n", 545 avpkt->size); 546 547 *data_size = 0; 548 return -1; 549 } 550 if (*data_size < subframe_size * mode_par->subframe_count * sizeof(float)) { 551 av_log(avctx, AV_LOG_ERROR, 552 "Error processing packet: output buffer (%d) too small\n", 553 *data_size); 554 555 *data_size = 0; 556 return -1; 557 } 558 559 init_get_bits(&gb, buf, mode_par->bits_per_frame); 560 561 for (i = 0; i < mode_par->frames_per_packet; i++) { 562 decode_parameters(&parm, &gb, mode_par); 563 564 if (ctx->mode == MODE_16k) 565 ff_sipr_decode_frame_16k(ctx, &parm, data); 566 else 567 decode_frame(ctx, &parm, data); 568 569 data += subframe_size * mode_par->subframe_count; 570 } 571 572 *data_size = mode_par->frames_per_packet * subframe_size * 573 mode_par->subframe_count * sizeof(float); 574 575 return mode_par->bits_per_frame >> 3; 576}; 577 578AVCodec sipr_decoder = { 579 "sipr", 580 AVMEDIA_TYPE_AUDIO, 581 CODEC_ID_SIPR, 582 sizeof(SiprContext), 583 sipr_decoder_init, 584 NULL, 585 NULL, 586 sipr_decode_frame, 587 .long_name = NULL_IF_CONFIG_SMALL("RealAudio SIPR / ACELP.NET"), 588}; 589