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量化

量化定点号

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句法

y =量化（x）
y= quantize(x,nt)
y= quantize(x,nt,rm)
y =量化（x，nt，rm，oa）
YBP= quantize(x,s)
ybp =量化（x，s，wl）
ybp =量化（x，s，wl，fl）
ybp =量化（x，s，wl，fl，rm）
YBP= quantize(x,s,wl,fl,rm,oa)

Description

y= quantize(X）量化Xusing these default values:

  • numerictype（True，16,15）

  • Floor舍入方法

  • 裹溢出动作

这numerictype，舍入方法和溢流作用仅在量化过程中适用。最终值，量化y，没有任何fimath。

y= quantize(X，，，，nt）量化X到指定的numerictypent。舍入方法和使用defa溢出的行动ult values.

y= quantize(X，，，，nt，，，，R M）量化X到指定的numerictype，，，，nt和圆形方法，R M。溢出操作使用默认值。

例子

y= quantize(X，，，，nt，，，，R M，，，，oa）量化X到指定的numerictype，，，，nt，舍入方法，R M和溢出动作，oa。

YBP= quantize(X，，，，s）量化Xto a binary-point, scaled fixed-point number. Thes输入指定要在numerictype（S，16,15）。Unspecified properties use these default values:

  • wordlength16

  • FractionLength15

  • 圆形的Floor

  • OverflowAction裹

YBP= quantize(X，，，，s，，，，WL）uses the specified word length,WL。分数长度默认为WL–1。未指定的属性使用默认值。

YBP= quantize(X，，，，s，，，，WL，，，，佛罗里达州）使用指定的分数长度，佛罗里达州。未指定的属性使用默认值。

YBP= quantize(X，，，，s，，，，WL，，，，佛罗里达州，，，，R M）uses the specified rounding method,R M。未指定的属性使用默认值。

例子

YBP= quantize(X，，，，s，，，，WL，，，，佛罗里达州，，，，R M，，，，oa）uses the specified overflow action,oa。

Examples

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Open Live Script

Createnumerictype目的，，，，NTBP，指定签名的8位单词长度，4位分数长度数据类型。

ntbp = numerictype（1,8,4）;

Define the input.

x_bp = fi（pi）
X_BP = 3.1416 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 13

Use the definednumerictype，，，，NTBP，，，，to quantize the input,X_BP，到二进制缩放数据类型。

ybp1 =量化（x_bp，ntbp）
YBP1 = 3.1250 DatatyPemode：固定点：二进制点缩放签名：签名wordlength：8 fractionLength：4
Open Live Script

创建一个numerictype目的，，，，NTSB，，，，which specifies a slope-bias data type.

ntsb = numerictype（'Scaling'，，，，“ Slopebias”，，，，...'slopeadjustmentFactor'，，，，1.8,'偏见'，，，，...1，'FixedExponent'，，，，-12);

Define the input.

x_bp = fi（pi）
X_BP = 3.1416 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 13

Use the definednumerictype，，，，NTSB，，，，to quantize the input,X_BP，，，，to a slope-bias data type.

ySB1 = quantize(x_BP, ntSB)
YSB1 = 3.1415 DatatyPemode：固定点：斜率和偏置缩放签名：签名WordLength：16斜率：0.000439453125偏差：1
Open Live Script

创建一个numerictype目的，，，，NTBP，指定签名的8位单词长度，4位分数长度数据类型。

ntbp = numerictype（1,8,4）;

Define the input.

X_SB = fi(rand(5,3),numerictype('Scaling'，，，，“ Slopebias”，，，，'偏见'，-0.125））
x_SB = 0.8147 0.0975 0.1576 0.8750 0.2785 0.8750 0.1270 0.5469 0.8750 0.8750 0.8750 0.4854 0.6324 0.8750 0.8003 DataTypeMode: Fixed-point: slope and bias scaling Signedness: Signed WordLength: 16 Slope: 3.0517578125e-5 Bias: -0.125

Use the definednumerictype，，，，NTBP，，，，to quantize the input,X_SB，到二进制点缩放数据类型。

ybp2 =量化（x_sb，ntbp，“最近”，，，，“饱和”）
YBP2 = 0.8125 0.1250 0.1875 0.8750 0.2500 0.8750 0.1250 0.5625 0.8750 0.8750 0.8750 0.5000 0.6250 0.8750 0.8125 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 8 FractionLength: 4
Open Live Script

创建一个numerictype目的，，，，NTSB，，，，which specifies a slope-bias data type.

ntsb = numerictype（'Scaling'，，，，“ Slopebias”，，，，...'slopeadjustmentFactor'，，，，1.8,'偏见'，，，，...1，'FixedExponent'，，，，-12);

Define the input.

X_SB = fi(rand(5,3),numerictype('Scaling'，，，，“ Slopebias”，，，，'偏见'，-0.125））
x_SB = 0.8147 0.0975 0.1576 0.8750 0.2785 0.8750 0.1270 0.5469 0.8750 0.8750 0.8750 0.4854 0.6324 0.8750 0.8003 DataTypeMode: Fixed-point: slope and bias scaling Signedness: Signed WordLength: 16 Slope: 3.0517578125e-5 Bias: -0.125

Use the definednumerictype，，，，NTSB，，，，to quantize the input,X_SB，，，，to a slope-bias data type.

ysb2 =量化（x_sb，ntsb，'天花板'，，，，'裹'）
ySB2 = 0.8150 0.0978 0.1580 0.8752 0.2789 0.8752 0.1272 0.5469 0.8752 0.8752 0.8752 0.4854 0.6326 0.8752 0.8005 DataTypeMode: Fixed-point: slope and bias scaling Signedness: Signed WordLength: 16 Slope: 0.000439453125 Bias: 1
Open Live Script

创建一个numerictype目的，，，，NTBP，指定签名的8位单词长度，4位分数长度数据类型。

ntbp = numerictype（1,8,4）;

Define the input.

xint =int8(-16:4:16)
xint =1x9 int8行矢量-16 -12 -8 -4 0 4 8 12 16

Use the definednumerictype，，，，NTBP，，，，to quantize the input|xInt| to a binary point scaled data type.

YBP3 = quantize(xInt,ntBP,'Zero'）
YBP3 = 0 4 -8 -4 0 4 -8 -4 0 DatatyPemode：固定点：二进制点缩放签名：签名wordlength：8 fractionLength：4

显示量化输出的范围。

range(yBP3)
ans = -8.0000 7.9375 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 8 FractionLength: 4

这first two and last three values are wrapped because they are outside the representable range of the output type.

Open Live Script

创建一个numerictype目的NTSB，，，，which specifies a slope-bias data type.

ntsb = numerictype（'Scaling'，，，，“ Slopebias”，，，，...'slopeadjustmentFactor'，，，，1.8,'偏见'，，，，...1，'FixedExponent'，，，，-12);

Define the input.

xint =int8(-16:4:16)
xint =1x9 int8行矢量-16 -12 -8 -4 0 4 8 12 16

Use the definednumerictype，，，，NTSB，，，，to quantize the input,Xint，，，，to a slope-bias data type.

ysb3 =量化（xint，ntsb，'圆形的'，，，，“饱和”）
ySB3 = Columns 1 through 7 -13.4000 -11.9814 -7.9877 -3.9939 -0.0002 3.9936 7.9873 Columns 8 through 9 11.9811 15.3996 DataTypeMode: Fixed-point: slope and bias scaling Signedness: Signed WordLength: 16 Slope: 0.000439453125 Bias: 1

显示量化输出的范围。

range(ySB3)
ans = -13.4000 15.3996 DataTypeMode: Fixed-point: slope and bias scaling Signedness: Signed WordLength: 16 Slope: 0.000439453125 Bias: 1

这first and last values saturate because they are at the limits of he representable range of the output type.

输入参数

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输入数据进行量化。有效输入是：

  • 内置签名或未签名的整数（int8，，，，int16，，，，int32，，，，INT64，，，，UINT8，，，，uint16，，，，UINT32，，，，Uint64）

  • Binary point scaled fixed-point fi

  • Slope-bias scaled fixed-point fi

尽管FI双打和FI单打被允许作为输入，但它们通过量化function without being quantized.

数字型目的that defines the sign, word length, and fraction length of a fixed-point number.

舍入方法to use

当数据溢出发生时要采取的措施

是否签署了定点号（是否签署）（true）or unsigned (错误的）

定点编号的单词长度

固定点的分数长度

输出参数

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Quantized value of the input

输入量化为二进制缩放值

扩展功能

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

也可以看看

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话题

Introduced before R2006a

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