pan_celp_const.h
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上传日期:2007-02-02
资源大小:6116k
文件大小:3k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- This software module was originally developed by
- Naoya Tanaka (Matsushita Communication Industrial Co., Ltd.)
- and edited by
- in the course of development of the
- MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7, 14496-1,2 and 3.
- This software module is an implementation of a part of one or more
- MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4 Audio
- standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio standards
- free license to this software module or modifications thereof for use in
- hardware or software products claiming conformance to the MPEG-2 NBC/
- MPEG-4 Audio standards. Those intending to use this software module in
- hardware or software products are advised that this 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-2 NBC/MPEG-4 Audio conforming products. The original developer
- 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 party from using
- the code for non MPEG-2 NBC/MPEG-4 Audio conforming products.
- This copyright notice must be included in all copies or derivative works.
- Copyright (c)1996.
- */
- /* pan_celp_const.h */
- /* Description of constant values used in the CELP core */
- /* 06/18/97 Ver 3.01 */
- #define PAN_GAMMA_BE .9902 /* LPC band expansion factor Be=12.5Hz */
- /* Perceptual weighting */
- #define PAN_GAM_AR 0.5 /* perceptual weighting factor */
- #define PAN_GAM_MA 0.9 /* perceptual weighting factor */
- /* LSP quantizer */
- #define PAN_DIM_MAX 10
- #define PAN_N_DC_LSP_MAX 8
- #define PAN_N_DC_LSP_CELP 2
- #define PAN_LSP_AR_R_CELP 0.5
- #define PAN_MINGAP_CELP (2./256.)
- #define PAN_N_DC_LSP_CELP_W 4
- #define PAN_LSP_AR_R_CELP_W 0.5
- #define PAN_MINGAP_CELP_W (1./256.)
- /* Bit allocation */
- #define PAN_BIT_LSP22_0 4
- #define PAN_BIT_LSP22_1 4
- #define PAN_BIT_LSP22_2 7
- #define PAN_BIT_LSP22_3 6
- #define PAN_BIT_LSP22_4 1
- #define PAN_NUM_LPC_INDICES 5
- /* Bit allocation (for wideband) */
- #define PAN_BIT_LSP_WL_0 5
- #define PAN_BIT_LSP_WL_1 5
- #define PAN_BIT_LSP_WL_2 7
- #define PAN_BIT_LSP_WL_3 7
- #define PAN_BIT_LSP_WL_4 1
- #define PAN_BIT_LSP_WU_0 4
- #define PAN_BIT_LSP_WU_1 4
- #define PAN_BIT_LSP_WU_2 7
- #define PAN_BIT_LSP_WU_3 5
- #define PAN_BIT_LSP_WU_4 1
- #define PAN_NUM_LPC_INDICES_W 10
- #define PAN_NUM_LSP_BITS_W 46
- /* Others */
- #define PAN_N_PCAN_INT 6 /* Dummy */
- #define PAN_PI 3.14159265358979