www.pudn.com > T-REC-G.722.1-200505-I!!SOFT-ZST-E.zip > tables.h

/*********************************************************************** 
************************************************************************ 
** 
**   ITU-T 7/14kHz Audio Coder Candidate (G.722.1 Annex C) Source Code 
** 
**   © 1999 PictureTel Coporation 
**          Andover, MA, USA   
** 
**	    All rights reserved. 
** 
************************************************************************ 
***********************************************************************/ 
/*********************************************************************** 
  Filename:    tables.h     
 
  Purpose:     Contains table definitions used by G.722.1 Annex C 
		 
  Design Notes: 
 
***********************************************************************/ 
/*********************************************************************** 
 Include files                                                            
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#define REGION_POWER_TABLE_SIZE 64 
#define NUM_CATEGORIES          8 
#define DCT_LENGTH              320 
#define MAX_DCT_LENGTH          640 
 
extern Word16 int_region_standard_deviation_table[REGION_POWER_TABLE_SIZE]; 
extern Word16 standard_deviation_inverse_table[REGION_POWER_TABLE_SIZE]; 
extern Word16 step_size_inverse_table[NUM_CATEGORIES]; 
extern Word16 vector_dimension[NUM_CATEGORIES]; 
extern Word16 number_of_vectors[NUM_CATEGORIES]; 
/* The last category isn't really coded with scalar quantization. */ 
extern Word16 max_bin[NUM_CATEGORIES]; 
extern Word16 max_bin_plus_one_inverse[NUM_CATEGORIES]; 
extern Word16 int_dead_zone[NUM_CATEGORIES]; 
extern Word16 samples_to_rmlt_window[DCT_LENGTH]; 
extern Word16 rmlt_to_samples_window[DCT_LENGTH]; 
 
/* Add next line in Release 1.2 */ 
extern Word16 int_dead_zone_low_bits[NUM_CATEGORIES]; 
 
extern Word16 max_samples_to_rmlt_window[MAX_DCT_LENGTH]; 
extern Word16 max_rmlt_to_samples_window[MAX_DCT_LENGTH];