?? form1.frm
字號(hào):
VERSION 5.00
Begin VB.Form Form1
Caption = "dtmf軟解碼-模擬 （采樣頻率：8KHZ)"
ClientHeight = 6780
ClientLeft = 60
ClientTop = 345
ClientWidth = 8205
LinkTopic = "Form1"
ScaleHeight = 6780
ScaleWidth = 8205
StartUpPosition = 3 '窗口缺省
Begin VB.TextBox Text7
Height = 270
Left = 6840
TabIndex = 38
Text = "0"
Top = 5760
Width = 975
End
Begin VB.TextBox Text6
Height = 270
Left = 6840
TabIndex = 37
Top = 6120
Width = 975
End
Begin VB.CommandButton Command2
Caption = "1000次 測(cè)試-->"
Height = 375
Left = 3960
TabIndex = 36
Top = 5760
Width = 2655
End
Begin VB.TextBox Text3
Height = 270
Left = 4920
TabIndex = 33
Text = "0.1"
Top = 5040
Width = 615
End
Begin VB.CommandButton Command1
Caption = "xx"
Height = 855
Left = 3960
TabIndex = 32
Top = 3960
Width = 3975
End
Begin VB.TextBox Text5
Height = 270
Left = 2880
TabIndex = 31
Top = 6240
Width = 855
End
Begin VB.TextBox Text4
Height = 270
Left = 4920
TabIndex = 29
Text = "50"
Top = 5400
Width = 615
End
Begin VB.TextBox Text2
Height = 3615
Left = 3960
MultiLine = -1 'True
ScrollBars = 2 'Vertical
TabIndex = 26
Top = 360
Width = 3975
End
Begin VB.TextBox Text1
Height = 2535
Left = 0
Locked = -1 'True
MultiLine = -1 'True
ScrollBars = 2 'Vertical
TabIndex = 24
Top = 3600
Width = 3735
End
Begin VB.CommandButton cmdN
Caption = "F"
Height = 615
Index = 15
Left = 2280
TabIndex = 15
Top = 2280
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "E"
Height = 615
Index = 14
Left = 1560
TabIndex = 14
Top = 2280
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "D"
Height = 615
Index = 13
Left = 840
TabIndex = 13
Top = 2280
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "C"
Height = 615
Index = 12
Left = 120
TabIndex = 12
Top = 2280
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "B"
Height = 615
Index = 11
Left = 2280
TabIndex = 11
Top = 1560
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "A"
Height = 615
Index = 10
Left = 1560
TabIndex = 10
Top = 1560
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "9"
Height = 615
Index = 9
Left = 840
TabIndex = 9
Top = 1560
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "8"
Height = 615
Index = 8
Left = 120
TabIndex = 8
Top = 1560
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "7"
Height = 615
Index = 7
Left = 2280
TabIndex = 7
Top = 840
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "6"
Height = 615
Index = 6
Left = 1560
TabIndex = 6
Top = 840
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "5"
Height = 615
Index = 5
Left = 840
TabIndex = 5
Top = 840
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "4"
Height = 615
Index = 4
Left = 120
TabIndex = 4
Top = 840
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "3"
Height = 615
Index = 3
Left = 2280
TabIndex = 3
Top = 120
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "2"
Height = 615
Index = 2
Left = 1560
TabIndex = 2
Top = 120
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "1"
Height = 615
Index = 1
Left = 840
TabIndex = 1
Top = 120
Width = 615
End
Begin VB.CommandButton cmdN
Caption = "0"
Height = 615
Index = 0
Left = 120
TabIndex = 0
Top = 120
Width = 615
End
Begin VB.Label Label15
Caption = "結(jié)果錯(cuò)誤0/00："
Height = 255
Left = 4320
TabIndex = 39
Top = 6240
Width = 1455
End
Begin VB.Label Label14
Caption = "hz"
Height = 255
Left = 5640
TabIndex = 35
Top = 5400
Width = 735
End
Begin VB.Label Label11
Caption = "x sin"
Height = 255
Left = 5640
TabIndex = 34
Top = 5040
Width = 615
End
Begin VB.Label Label13
Caption = "最大值采樣："
Height = 375
Left = 0
TabIndex = 30
Top = 6240
Width = 1575
End
Begin VB.Label Label12
Caption = "噪音："
Height = 375
Left = 3960
TabIndex = 28
Top = 5040
Width = 855
End
Begin VB.Label Label10
Caption = "結(jié)果："
Height = 255
Left = 3960
TabIndex = 27
Top = 120
Width = 735
End
Begin VB.Label Label9
Caption = "采樣："
Height = 255
Left = 0
TabIndex = 25
Top = 3360
Width = 855
End
Begin VB.Label Label8
Caption = "1633(7"
Height = 375
Left = 2400
TabIndex = 23
Top = 3000
Width = 1095
End
Begin VB.Label Label7
Caption = "1477(6"
Height = 255
Left = 1680
TabIndex = 22
Top = 3000
Width = 735
End
Begin VB.Label Label6
Caption = "1336(5"
Height = 255
Left = 960
TabIndex = 21
Top = 3000
Width = 735
End
Begin VB.Label Label5
Caption = "1209(4"
Height = 255
Left = 240
TabIndex = 20
Top = 3000
Width = 1095
End
Begin VB.Label Label4
Caption = "941(3"
Height = 255
Left = 3120
TabIndex = 19
Top = 2400
Width = 735
End
Begin VB.Label Label3
Caption = "852(2"
Height = 255
Left = 3120
TabIndex = 18
Top = 1800
Width = 735
End
Begin VB.Label Label2
Caption = "770(1"
Height = 255
Left = 3120
TabIndex = 17
Top = 1080
Width = 855
End
Begin VB.Label Label1
Caption = "697(0"
Height = 255
Left = 3120
TabIndex = 16
Top = 360
Width = 855
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Private Type f
l As Integer
h As Integer
End Type
Const pro = 480
Dim n(0 To 15) As f
'0.000125 s-采樣,所以（1/697）/0.000125=12
Dim sine(0 To 7, 0 To pro) As Integer
Dim cosi(0 To 7, 0 To pro) As Integer
Dim resDTMF As Integer
Private Sub cmdN_Click(Index As Integer)
Dim i%, j%
Dim s(0 To 7)
Dim ip(0 To pro)
Dim d1, d2
Dim adh, adl
Dim zy
Dim big1, big2
Dim t, v
Dim d, dd
Text7 = Index
d = Val(Text4)
If d = 0 Then d = 10000
dd = Val(Text3)
d1 = 2 * 3.1415926535 * Rnd
d2 = 2 * 3.1415926535 * Rnd
adh = 2 * 3.1415926535 * 0.000125 / (1 / n(Index).h)
adl = 2 * 3.1415926535 * 0.000125 / (1 / n(Index).l)
zy = 2 * 3.1415926535 * 0.000125 / (1 / d)
For i = 0 To pro
ip(i) = IIf(Sin(i * adh + d1) + Sin(i * adl + d2) + dd * Sin(i * zy) > 0, 1, 0)
Next i
Text1 = ""
For i = 0 To 7
s(i) = 0
For j = 0 To pro
s(i) = s(i) + IIf(ip(j) = sine(i, j), 1, -1)
Next j
s(i) = Abs(s(i))
Text1 = Text1 & Str(i) & ")" & Str(s(i)) & vbCrLf
Next i
big1 = 0
big2 = 0
v = 0
For i = 0 To 3
If s(i) > v Then
v = s(i)
big1 = i
End If
Next i
v = 0
For i = 4 To 7
If s(i) > v Then
v = s(i)
big2 = i
End If
Next i
Text5 = Str(big1) & " " & Str(big2)
If big1 < big2 Then t = big1: big1 = big2: big2 = t
resDTMF = big2 * 4 + (big1 - 4)
Text2 = Text2 & " " & big2 * 4 + (big1 - 4)
End Sub
Private Sub Command1_Click()
Text2 = ""
End Sub
Private Sub Command2_Click()
Dim d%, i%, R
d = Val(Text7)
If d > 15 Then d = 0
R = 0
Me.Enabled = False
For i = 0 To 999
Call cmdN_Click(d)
Me.Caption = "dtmf軟解碼-模擬 （采樣頻率：8KHZ)---" & Str(i) & "次 ---- 100ms"
DoEvents
If resDTMF <> d Then R = R + 1
Next i
Me.Caption = "dtmf軟解碼-模擬 （采樣頻率：8KHZ)"
Text6 = Str(R)
Me.Enabled = True
End Sub
Private Sub Form_DblClick()
frmAbout.Show (1)
End Sub
Private Sub Form_Load()
Dim i%, j
For i = 0 To 15
Select Case i Mod 4
Case 0:
n(i).h = 1209
Case 1:
n(i).h = 1336
Case 2:
n(i).h = 1477
Case 3:
n(i).h = 1633
End Select
Select Case i \ 4
Case 0:
n(i).l = 697
Case 1:
n(i).l = 770
Case 2:
n(i).l = 852
Case 3:
n(i).l = 941
End Select
Next
For i = 0 To pro
sine(0, i) = fsine(i, 697)
cosi(0, i) = fcosi(i, 697)
Next i
For i = 0 To pro
sine(1, i) = fsine(i, 770)
cosi(1, i) = fcosi(i, 770)
Next i
For i = 0 To pro
sine(2, i) = fsine(i, 852)
cosi(2, i) = fcosi(i, 852)
Next i
For i = 0 To pro
sine(3, i) = fsine(i, 941)
cosi(3, i) = fcosi(i, 941)
Next i
For i = 0 To pro
sine(4, i) = fsine(i, 1209)
cosi(4, i) = fcosi(i, 1209)
Next i
For i = 0 To pro
sine(5, i) = fsine(i, 1336)
cosi(5, i) = fcosi(i, 1336)
Next i
For i = 0 To pro
sine(6, i) = fsine(i, 1477)
cosi(6, i) = fcosi(i, 1477)
Next i
For i = 0 To pro
sine(7, i) = fsine(i, 1633)
cosi(7, i) = fcosi(i, 1633)
Next i
Randomize (Timer)
End Sub
Private Function fsine(i As Integer, fr As Integer) As Integer
fsine = IIf(Sin(2 * 3.1415926535 * 0.000125 * i * fr) > 0, 1, 0)
End Function
Private Function fcosi(i As Integer, fr As Integer) As Integer
fcosi = IIf(Cos(2 * 3.1415926535 * 0.000125 * i * fr) > 0, 1, 0)
End Function
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