phi_lpcq.h
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上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:8k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*====================================================================*/
- /* MPEG-4 Audio (ISO/IEC 14496-3) Copyright Header */
- /*====================================================================*/
- /*
- This software module was originally developed by Rakesh Taori and Andy
- Gerrits (Philips Research Laboratories, Eindhoven, The Netherlands) in
- the course of development of the MPEG-4 Audio (ISO/IEC 14496-3). This
- software module is an implementation of a part of one or more MPEG-4
- Audio (ISO/IEC 14496-3) tools as specified by the MPEG-4 Audio
- (ISO/IEC 14496-3). ISO/IEC gives users of the MPEG-4 Audio (ISO/IEC
- 14496-3) free license to this software module or modifications thereof
- for use in hardware or software products claiming conformance to the
- MPEG-4 Audio (ISO/IEC 14496-3). Those intending to use this software
- module in hardware or software products are advised that its use may
- infringe existing patents. The original developer of this software
- module and his/her company, the subsequent editors and their
- companies, and ISO/IEC have no liability for use of this software
- module or modifications thereof in an implementation. Copyright is not
- released for non MPEG-4 Audio (ISO/IEC 14496-3) conforming products.
- CN1 retains full right to use the code for his/her own purpose, assign
- or donate the code to a third party and to inhibit third parties from
- using the code for non MPEG-4 Audio (ISO/IEC 14496-3) conforming
- products. This copyright notice must be included in all copies or
- derivative works. Copyright 1996.
- */
- /*====================================================================*/
- /*======================================================================*/
- /* */
- /* INCLUDE_FILE: PHI_LPCQ.H */
- /* PACKAGE: WDBxx */
- /* COMPONENT: Tables for LPC Coeffs Quantization */
- /* */
- /*======================================================================*/
- #ifndef _phi_lpcq_h_
- #define _phi_lpcq_h_
- #ifdef __cplusplus
- extern "C" {
- #endif
- #define SCALING_BITS_rfc 16L /* scaling bits for rfc's */
- #define SCALE_rfc (1L << SCALING_BITS_rfc) /* scal. of rfc's */
- /*======================================================================*/
- /* TABLE FOR Reflection Coefficients QUANTIZATION */
- /* UNIFORM LAR QUANTISATION ==> NONLINEAR LOOK_UP TABLE for Refl. coeffs*/
- /*======================================================================*/
- float PHI_tbl_rfc_level[2][49] =
- {
- {
- (float)-0.9882,
- (float)-0.9848,
- (float)-0.9806,
- (float)-0.9751,
- (float)-0.9682,
- (float)-0.9593,
- (float)-0.9481,
- (float)-0.9338,
- (float)-0.9158,
- (float)-0.8932,
- (float)-0.8649,
- (float)-0.8298,
- (float)-0.7866,
- (float)-0.7341,
- (float)-0.6710,
- (float)-0.5964,
- (float)-0.5098,
- (float)-0.4116,
- (float)-0.3027,
- (float)-0.1853,
- (float)-0.0624,
- (float)0.0624,
- (float)0.1853,
- (float)0.3027,
- (float)0.4116,
- (float)0.5098,
- (float)0.5964,
- (float)0.6710,
- (float)0.7341,
- (float)0.7866,
- (float)0.8298,
- (float)0.8649,
- (float)0.8932,
- (float)0.9158,
- (float)0.9338,
- (float)0.9481,
- (float)0.9593,
- (float)0.9682,
- (float)0.9751,
- (float)0.9806,
- (float)0.9848,
- (float)0.9882,
- (float)0.9908,
- (float)0.9928,
- (float)0.9944,
- (float)0.9956,
- (float)0.9966,
- (float)0.9973,
- (float)0.9999
- },
- {
- (long) (-0.9896 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9866 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9828 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9780 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9719 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9640 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9540 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9414 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9253 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.9051 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.8798 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.8483 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.8093 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.7616 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.7039 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.6351 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.5546 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.4621 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.3584 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.2449 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (-0.1244 * SCALE_rfc - 0.5) / (double) SCALE_rfc,
- (long) (0.0000),
- (long) (0.1244 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.2449 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.3584 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.4621 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.5546 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.6351 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.7039 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.7616 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.8093 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.8483 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.8798 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9051 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9253 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9414 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9540 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9640 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9719 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9780 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9828 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9866 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9896 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9919 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9937 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9951 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9961 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9970 * SCALE_rfc + 0.5) / (double) SCALE_rfc,
- (long) (0.9977 * SCALE_rfc + 0.5) / (double) SCALE_rfc
- }
- };
- /*======================================================================*/
- /* TABLE FOR Range of reflection coeffs */
- /*======================================================================*/
- short PHI_tbl_rfc_range[2][20] =
- {
- {
- 13,
- 0,
- 16,
- 12,
- 16,
- 13,
- 16,
- 14,
- 18,
- 16,
- 18,
- 17,
- 19,
- 17,
- 19,
- 18,
- 19,
- 17,
- 19,
- 18,
- },
- {
- 36,
- 28,
- 15,
- 14,
- 13,
- 13,
- 12,
- 11,
- 9,
- 8,
- 8,
- 7,
- 7,
- 8,
- 7,
- 6,
- 6,
- 7,
- 6,
- 6
- }
- };
- #ifdef __cplusplus
- }
- #endif
- #endif /* #ifndef _phi_lpcq_h_ */
- /*======================================================================*/
- /* H I S T O R Y */
- /*======================================================================*/
- /* 17-04-96 R. Taori Initial Version */