vq.h
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- /*
- 2.4 kbps MELP Proposed Federal Standard speech coder
- Fixed-point C code, version 1.0
- Copyright (c) 1998, Texas Instruments, Inc.
- Texas Instruments has intellectual property rights on the MELP
- algorithm. The Texas Instruments contact for licensing issues for
- commercial and non-government use is William Gordon, Director,
- Government Contracts, Texas Instruments Incorporated, Semiconductor
- Group (phone 972 480 7442).
- The fixed-point version of the voice codec Mixed Excitation Linear
- Prediction (MELP) is based on specifications on the C-language software
- simulation contained in GSM 06.06 which is protected by copyright and
- is the property of the European Telecommunications Standards Institute
- (ETSI). This standard is available from the ETSI publication office
- tel. +33 (0)4 92 94 42 58. ETSI has granted a license to United States
- Department of Defense to use the C-language software simulation contained
- in GSM 06.06 for the purposes of the development of a fixed-point
- version of the voice codec Mixed Excitation Linear Prediction (MELP).
- Requests for authorization to make other use of the GSM 06.06 or
- otherwise distribute or modify them need to be addressed to the ETSI
- Secretariat fax: +33 493 65 47 16.
- */
- /*
- vq.h VQ include file.
- (Search/decode/distortion/weighting functions for VQ)
- Copyright (c) 1997 by Texas Instruments Incorporated. All rights reserved.
- */
- #ifndef _vq_h_
- #define _vq_h_
- Shortword *vq_lspw(Shortword *w, Shortword *lsp, Shortword *a,
- Shortword p);
- Shortword vq_ms4(Shortword *cb, Shortword *u, Shortword *u_est,
- Shortword *levels, Shortword ma, Shortword stages,
- Shortword p, Shortword *w, Shortword *u_hat,
- Shortword *indices, Shortword max_inner);
- Shortword *vq_msd2(Shortword *cb, Shortword *u, Shortword *u_est,
- Shortword *a, Shortword *indices, Shortword *levels,
- Shortword stages, Shortword p, Shortword conversion,
- Shortword diff_Q);
- Longword vq_enc(Shortword *cb,Shortword *u,Shortword levels,Shortword p,
- Shortword *u_hat,Shortword *indices);
- void vq_fsw(Shortword *w_fs, Shortword num_harm, Shortword pitch);
- /* Structure definition */
- struct msvq_param { /* Multistage VQ parameters */
- Shortword num_stages;
- Shortword *num_levels;
- Shortword *num_bits;
- Shortword dimension;
- Shortword num_best;
- Shortword *indices;
- char *fname_cb;
- Shortword *cb;
- Shortword *cb_mean;
- };
- /* External function definitions */
- #define msvq_enc(u,w,u_hat,par)
- vq_ms4(par.cb,u,par.cb_mean,par.num_levels,
- par.num_best,par.num_stages,par.dimension,w,u_hat,
- par.indices,MSVQ_MAXCNT)
- #define fsvq_enc(u,u_hat,par)
- vq_enc(par.cb,u,*(par.num_levels),
- par.dimension,u_hat,
- par.indices)
- #endif