?? echocancel.h
字號:
/* ***********************************************************
* THIS PROGRAM IS PROVIDED "AS IS". TI MAKES NO WARRANTIES OR
* REPRESENTATIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
* INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR
* COMPLETENESS OF RESPONSES, RESULTS AND LACK OF NEGLIGENCE.
* TI DISCLAIMS ANY WARRANTY OF TITLE, QUIET ENJOYMENT, QUIET
* POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY
* INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO THE PROGRAM OR
* YOUR USE OF THE PROGRAM.
*
* IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
* CONSEQUENTIAL OR INDIRECT DAMAGES, HOWEVER CAUSED, ON ANY
* THEORY OF LIABILITY AND WHETHER OR NOT TI HAS BEEN ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGES, ARISING IN ANY WAY OUT
* OF THIS AGREEMENT, THE PROGRAM, OR YOUR USE OF THE PROGRAM.
* EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED TO, COST OF
* REMOVAL OR REINSTALLATION, COMPUTER TIME, LABOR COSTS, LOSS
* OF GOODWILL, LOSS OF PROFITS, LOSS OF SAVINGS, OR LOSS OF
* USE OR INTERRUPTION OF BUSINESS. IN NO EVENT WILL TI'S
* AGGREGATE LIABILITY UNDER THIS AGREEMENT OR ARISING OUT OF
* YOUR USE OF THE PROGRAM EXCEED FIVE HUNDRED DOLLARS
* (U.S.$500).
*
* Unless otherwise stated, the Program written and copyrighted
* by Texas Instruments is distributed as "freeware". You may,
* only under TI's copyright in the Program, use and modify the
* Program without any charge or restriction. You may
* distribute to third parties, provided that you transfer a
* copy of this license to the third party and the third party
* agrees to these terms by its first use of the Program. You
* must reproduce the copyright notice and any other legend of
* ownership on each copy or partial copy, of the Program.
*
* You acknowledge and agree that the Program contains
* copyrighted material, trade secrets and other TI proprietary
* information and is protected by copyright laws,
* international copyright treaties, and trade secret laws, as
* well as other intellectual property laws. To protect TI's
* rights in the Program, you agree not to decompile, reverse
* engineer, disassemble or otherwise translate any object code
* versions of the Program to a human-readable form. You agree
* that in no event will you alter, remove or destroy any
* copyright notice included in the Program. TI reserves all
* rights not specifically granted under this license. Except
* as specifically provided herein, nothing in this agreement
* shall be construed as conferring by implication, estoppel,
* or otherwise, upon you, any license or other right under any
* TI patents, copyrights or trade secrets.
*
* You may not use the Program in non-TI devices.
* ********************************************************* */
/***********************************************************************
** File Name: EchoCancel.h
** Part Number: TLV320AIC10/11EVM-SW-00104
************************************************************************
** Copyright (c) Texas Instruments, Inc. 2000
************************************************************************
**
** Release History:
** Version Date Engr Description
** 1.00 10-11-2000 Wendy X Fang Original Release
**
************************************************************************
**
** Function:
** This is the head file for echo cancellation file -- EchoCancel.c,
** which defines all of the variables and parameters.
**
***********************************************************************/
/***********************************************************************
** Define Statements
***********************************************************************/
#define Alpha 5 /* 2^Alpha=32 for 4ms window(8KHz S.R.) */
#define FilterLength 32 /* FilterLength = 2^Alpha */
#define Mu 1024 /* adaption step = 0.015625 */
/***********************************************************************
** Global Varaibles that are Used for Echo Cancellations
***********************************************************************/
unsigned int NCount = 0; /* step counter */
int h[FilterLength] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}; /* adaptive filter coefficients */
int SIn[FilterLength] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}; /* far end signal input array */
int EchoResid = 0; /* echo estimation error or residual */
long int EchoEst = 0; /* estimated echo by adaptive filter */
long int PowerSIn = 0; /* far ebd signal power */
/***********************************************************************
** Global Varaibles Related to AIC10 RX/TX & defined by other Files
***********************************************************************/
extern unsigned int SL_ADC; /* near end input (echo) */
extern int SOut; /* output to far end */
extern int ToneWave; /* far end input & near end output */
/***********************************************************************
** End of File -- EchoCancel.h
***********************************************************************/
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -