【信号处理】语音信号线性预测（LPC）分析含Matlab源码

原创

matlab科研助手 2022-04-06 22:53:25 博主文章分类：信号处理 ©著作权

文章标签 ide 语音信号 matlab代码 文章分类 Python 后端开发

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1 简介

线性预测技术作为一种基于全极点模型假定和均方预测误差最小准则下的波形逼近技术.本文简要介绍了LPC技术的基本原理,并利用MATLAB这一有力工具对语音信号进行了LPC分析,并对阶数的选取做了比较分析.

2 部分代码

function varargout = simplelpcgui(varargin)
% SIMPLELPCGUI M-file for simplelpcgui.fig
%      SIMPLELPCGUI, by itself, creates a new SIMPLELPCGUI or raises the existing
%      singleton*.
%
%      H = SIMPLELPCGUI returns the handle to a new SIMPLELPCGUI or the handle to
%      the existing singleton*.
%
%      SIMPLELPCGUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in SIMPLELPCGUI.M with the given input arguments.
%
%      SIMPLELPCGUI('Property','Value',...) creates a new SIMPLELPCGUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before simplelpcgui_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to simplelpcgui_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help simplelpcgui
% Last Modified by GUIDE v2.5 22-May-2021 11:46:45
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @simplelpcgui_OpeningFcn, ...
                   'gui_OutputFcn',  @simplelpcgui_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before simplelpcgui is made visible.
function simplelpcgui_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to simplelpcgui (see VARARGIN)
% Choose default command line output for simplelpcgui
handles.output = hObject;
handles.pointer_switch=1;
handles.filecnt=1;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes simplelpcgui wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = simplelpcgui_OutputFcn(hObject, eventdata, handles)
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
% --- Executes on button press in pbLoad.
function pbLoad_Callback(hObject, eventdata, handles)
% hObject    handle to pbLoad (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Load speech data 
temp = cd;
[filename, pathname] = uigetfile('*.mat'); 
S = load([pathname filename]);