FixedBiasComponent applies a fixed per-element bias; it's similar to the AddShift component in the nnet1 setup (and only needed for nnet1 model conversion. More...

#include <nnet-simple-component.h>

Inheritance diagram for FixedBiasComponent:

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Collaboration diagram for FixedBiasComponent:

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Public Member Functions
	FixedBiasComponent ()

virtual std::string	Type () const
	Returns a string such as "SigmoidComponent", describing the type of the object. More...

virtual std::string	Info () const
	Returns some text-form information about this component, for diagnostics. More...

virtual int32	Properties () const
	Return bitmask of the component's properties. More...

void	Init (const CuVectorBase< BaseFloat > &scales)

virtual void	InitFromConfig (ConfigLine *cfl)
	Initialize, from a ConfigLine object. More...

virtual int32	InputDim () const
	Returns input-dimension of this component. More...

virtual int32	OutputDim () const
	Returns output-dimension of this component. More...

virtual void *	Propagate (const ComponentPrecomputedIndexes indexes, const CuMatrixBase< BaseFloat > &in, CuMatrixBase< BaseFloat > out) const
	Propagate function. More...

virtual void	Backprop (const std::string &debug_info, const ComponentPrecomputedIndexes indexes, const CuMatrixBase< BaseFloat > &, const CuMatrixBase< BaseFloat > &, const CuMatrixBase< BaseFloat > &out_deriv, void memo, Component , CuMatrixBase< BaseFloat > in_deriv) const
	Backprop function; depending on which of the arguments 'to_update' and 'in_deriv' are non-NULL, this can compute input-data derivatives and/or perform model update. More...

virtual Component *	Copy () const
	Copies component (deep copy). More...

virtual void	Read (std::istream &is, bool binary)
	Read function (used after we know the type of the Component); accepts input that is missing the token that describes the component type, in case it has already been consumed. More...

virtual void	Write (std::ostream &os, bool binary) const
	Write component to stream. More...

Public Member Functions inherited from Component
virtual void	StoreStats (const CuMatrixBase< BaseFloat > &in_value, const CuMatrixBase< BaseFloat > &out_value, void *memo)
	This function may store stats on average activation values, and for some component types, the average value of the derivative of the nonlinearity. More...

virtual void	ZeroStats ()
	Components that provide an implementation of StoreStats should also provide an implementation of ZeroStats(), to set those stats to zero. More...

virtual void	GetInputIndexes (const MiscComputationInfo &misc_info, const Index &output_index, std::vector< Index > *desired_indexes) const
	This function only does something interesting for non-simple Components. More...

virtual bool	IsComputable (const MiscComputationInfo &misc_info, const Index &output_index, const IndexSet &input_index_set, std::vector< Index > *used_inputs) const
	This function only does something interesting for non-simple Components, and it exists to make it possible to manage optionally-required inputs. More...

virtual void	ReorderIndexes (std::vector< Index > input_indexes, std::vector< Index > output_indexes) const
	This function only does something interesting for non-simple Components. More...

virtual ComponentPrecomputedIndexes *	PrecomputeIndexes (const MiscComputationInfo &misc_info, const std::vector< Index > &input_indexes, const std::vector< Index > &output_indexes, bool need_backprop) const
	This function must return NULL for simple Components. More...

virtual void	Scale (BaseFloat scale)
	This virtual function when called on – an UpdatableComponent scales the parameters by "scale" when called by an UpdatableComponent. More...

virtual void	Add (BaseFloat alpha, const Component &other)
	This virtual function when called by – an UpdatableComponent adds the parameters of another updatable component, times some constant, to the current parameters. More...

virtual void	DeleteMemo (void *memo) const
	This virtual function only needs to be overwritten by Components that return a non-NULL memo from their Propagate() function. More...

virtual void	ConsolidateMemory ()
	This virtual function relates to memory management, and avoiding fragmentation. More...

	Component ()

virtual	~Component ()

Protected Member Functions
	KALDI_DISALLOW_COPY_AND_ASSIGN (FixedBiasComponent)

Protected Attributes
CuVector< BaseFloat >	bias_

Additional Inherited Members
Static Public Member Functions inherited from Component
static Component *	ReadNew (std::istream &is, bool binary)
	Read component from stream (works out its type). Dies on error. More...

static Component *	NewComponentOfType (const std::string &type)
	Returns a new Component of the given type e.g. More...

Detailed Description

FixedBiasComponent applies a fixed per-element bias; it's similar to the AddShift component in the nnet1 setup (and only needed for nnet1 model conversion.

Definition at line 1140 of file nnet-simple-component.h.

Constructor & Destructor Documentation

◆ FixedBiasComponent()

FixedBiasComponent ( )

inline

Definition at line 1142 of file nnet-simple-component.h.

1142 { }

Member Function Documentation

◆ Backprop()

void Backprop	(	const std::string &	debug_info,
		const ComponentPrecomputedIndexes *	indexes,
		const CuMatrixBase< BaseFloat > &	in_value,
		const CuMatrixBase< BaseFloat > &	out_value,
		const CuMatrixBase< BaseFloat > &	out_deriv,
		void *	memo,
		Component *	to_update,
		CuMatrixBase< BaseFloat > *	in_deriv
	)		const

virtual

Backprop function; depending on which of the arguments 'to_update' and 'in_deriv' are non-NULL, this can compute input-data derivatives and/or perform model update.

Parameters

[in]	debug_info	The component name, to be printed out in any warning messages.
[in]	indexes	A pointer to some information output by this class's PrecomputeIndexes function (will be NULL for simple components, i.e. those that don't do things like splicing).
[in]	in_value	The matrix that was given as input to the Propagate function. Will be ignored (and may be empty) if Properties()&kBackpropNeedsInput == 0.
[in]	out_value	The matrix that was output from the Propagate function. Will be ignored (and may be empty) if Properties()&kBackpropNeedsOutput == 0
[in]	out_deriv	The derivative at the output of this component.
[in]	memo	This will normally be NULL, but for component types that set the flag kUsesMemo, this will be the return value of the Propagate() function that corresponds to this Backprop() function. Ownership of any pointers is not transferred to the Backprop function; DeleteMemo() will be called to delete it.
[out]	to_update	If model update is desired, the Component to be updated, else NULL. Does not have to be identical to this. If supplied, you can assume that to_update->Properties() & kUpdatableComponent is nonzero.
[out]	in_deriv	The derivative at the input of this component, if needed (else NULL). If Properties()&kBackpropInPlace, may be the same matrix as out_deriv. If Properties()&kBackpropAdds, this is added to by the Backprop routine, else it is set. The component code chooses which mode to work in, based on convenience.

Implements Component.

Definition at line 3772 of file nnet-simple-component.cc.

References CuMatrixBase< Real >::CopyFromMat(), and NVTX_RANGE.

                                                                            {
   NVTX_RANGE("FixedBiasComponent::Backprop");
   // the following statement will do nothing if in_deriv and out_deriv have same
   // memory.
   in_deriv->CopyFromMat(out_deriv);
 }

◆ Copy()

Component * Copy ( ) const

virtual

Copies component (deep copy).

Implements Component.

Definition at line 3786 of file nnet-simple-component.cc.

References FixedBiasComponent::bias_.

                                           {
   FixedBiasComponent *ans = new FixedBiasComponent();
   ans->bias_ = bias_;
   return ans;
 }

◆ Info()

std::string Info ( ) const

virtual

Returns some text-form information about this component, for diagnostics.

Starts with the type of the component. E.g. "SigmoidComponent dim=900", although most components will have much more info.

Reimplemented from Component.

Definition at line 3757 of file nnet-simple-component.cc.

References Component::Info(), and kaldi::nnet3::PrintParameterStats().

                                          {
   std::ostringstream stream;
   stream << Component::Info();
   PrintParameterStats(stream, "bias", bias_, true);
   return stream.str();
 }

◆ Init()

void Init ( const CuVectorBase< BaseFloat > & scales )

Definition at line 3730 of file nnet-simple-component.cc.

References CuVectorBase< Real >::Dim(), and KALDI_ASSERT.

                                                                  {
   KALDI_ASSERT(bias.Dim() != 0);
   bias_ = bias;
 }

◆ InitFromConfig()

void InitFromConfig ( ConfigLine * cfl )

virtual

Initialize, from a ConfigLine object.

Parameters

[in] cfl A ConfigLine containing any parameters that are needed for initialization. For example: "dim=100 param-stddev=0.1"

Implements Component.

Definition at line 3735 of file nnet-simple-component.cc.

References ConfigLine::GetValue(), ConfigLine::HasUnusedValues(), FixedAffineComponent::Init(), KALDI_ASSERT, KALDI_ERR, kaldi::ReadKaldiObject(), CuVectorBase< Real >::SetRandn(), FixedAffineComponent::Type(), and ConfigLine::WholeLine().

                                                        {
   std::string filename;
   // Accepts "bias" config (for filename) or "dim" -> random init, for testing.
   if (cfl->GetValue("bias", &filename)) {
     if (cfl->HasUnusedValues())
       KALDI_ERR << "Invalid initializer for layer of type "
                 << Type() << ": \"" << cfl->WholeLine() << "\"";
     CuVector<BaseFloat> vec;
     ReadKaldiObject(filename, &vec);
     Init(vec);
   } else {
     int32 dim;
     if (!cfl->GetValue("dim", &dim) || cfl->HasUnusedValues())
       KALDI_ERR << "Invalid initializer for layer of type "
                 << Type() << ": \"" << cfl->WholeLine() << "\"";
     KALDI_ASSERT(dim > 0);
     CuVector<BaseFloat> vec(dim);
     vec.SetRandn();
     Init(vec);
   }
 }

◆ InputDim()

virtual int32 InputDim ( ) const

inlinevirtual

Returns input-dimension of this component.

Implements Component.

Definition at line 1155 of file nnet-simple-component.h.

1155 { return bias_.Dim(); }

kaldi::nnet3::FixedBiasComponent::bias_

CuVector< BaseFloat > bias_

Definition: nnet-simple-component.h:1174

◆ KALDI_DISALLOW_COPY_AND_ASSIGN()

KALDI_DISALLOW_COPY_AND_ASSIGN ( FixedBiasComponent )

protected

◆ OutputDim()

virtual int32 OutputDim ( ) const

inlinevirtual

Returns output-dimension of this component.

Implements Component.

Definition at line 1156 of file nnet-simple-component.h.

References PnormComponent::Backprop(), PnormComponent::Copy(), PnormComponent::Propagate(), Component::Propagate(), PnormComponent::Read(), and PnormComponent::Write().

1156 { return bias_.Dim(); }

kaldi::nnet3::FixedBiasComponent::bias_

CuVector< BaseFloat > bias_

Definition: nnet-simple-component.h:1174

◆ Propagate()

void * Propagate	(	const ComponentPrecomputedIndexes *	indexes,
		const CuMatrixBase< BaseFloat > &	in,
		CuMatrixBase< BaseFloat > *	out
	)		const

virtual

Propagate function.

Parameters

[in]	indexes	A pointer to some information output by this class's PrecomputeIndexes function (will be NULL for simple components, i.e. those that don't do things like splicing).
[in]	in	The input to this component. Num-columns == InputDim().
[out]	out	The output of this component. Num-columns == OutputDim(). Note: output of this component will be added to the initial value of "out" if Properties()&kPropagateAdds != 0; otherwise the output will be set and the initial value ignored. Each Component chooses whether it is more convenient implementation-wise to add or set, and the calling code has to deal with it.

Returns: Normally returns NULL, but may return a non-NULL value for components which have the flag kUsesMemo set. This value will be passed into the corresponding Backprop routine.

Implements Component.

Definition at line 3764 of file nnet-simple-component.cc.

References CuMatrixBase< Real >::AddVecToRows(), and CuMatrixBase< Real >::CopyFromMat().

                                                                        {
   out->CopyFromMat(in);  // will do nothing if in and out have same memory.
   out->AddVecToRows(1.0, bias_, 1.0);
   return NULL;
 }

◆ Properties()

virtual int32 Properties ( ) const

inlinevirtual

Return bitmask of the component's properties.

These properties depend only on the component's type. See enum ComponentProperties.

Implements Component.

Definition at line 1146 of file nnet-simple-component.h.

References PnormComponent::Init(), PnormComponent::InitFromConfig(), kaldi::nnet3::kBackpropInPlace, kaldi::nnet3::kPropagateInPlace, and kaldi::nnet3::kSimpleComponent.

                                    {
     return kSimpleComponent|kPropagateInPlace|kBackpropInPlace;
   }

◆ Read()

void Read	(	std::istream &	is,
		bool	binary
	)

virtual

Read function (used after we know the type of the Component); accepts input that is missing the token that describes the component type, in case it has already been consumed.

Implements Component.

Definition at line 3800 of file nnet-simple-component.cc.

References kaldi::ExpectOneOrTwoTokens(), and kaldi::nnet3::ExpectToken().

                                                          {
   ExpectOneOrTwoTokens(is, binary, "<FixedBiasComponent>", "<Bias>");
   bias_.Read(is, binary);
   ExpectToken(is, binary, "</FixedBiasComponent>");
 }

◆ Type()

virtual std::string Type ( ) const

inlinevirtual

Returns a string such as "SigmoidComponent", describing the type of the object.

Implements Component.

Definition at line 1143 of file nnet-simple-component.h.

References Component::Info().

1143 { return "FixedBiasComponent"; }

◆ Write()

void Write	(	std::ostream &	os,
		bool	binary
	)		const

virtual

Write component to stream.

Implements Component.

Definition at line 3793 of file nnet-simple-component.cc.

References kaldi::WriteToken().

                                                                 {
   WriteToken(os, binary, "<FixedBiasComponent>");
   WriteToken(os, binary, "<Bias>");
   bias_.Write(os, binary);
   WriteToken(os, binary, "</FixedBiasComponent>");
 }

Member Data Documentation

◆ bias_

CuVector<BaseFloat> bias_

protected

Definition at line 1174 of file nnet-simple-component.h.

Referenced by FixedBiasComponent::Copy().

The documentation for this class was generated from the following files:

nnet3/nnet-simple-component.h
nnet3/nnet-simple-component.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ FixedBiasComponent()

Member Function Documentation

◆ Backprop()

◆ Copy()

◆ Info()

◆ Init()

◆ InitFromConfig()

◆ InputDim()

◆ KALDI_DISALLOW_COPY_AND_ASSIGN()

◆ OutputDim()

◆ Propagate()

◆ Properties()

◆ Read()

◆ Type()

◆ Write()

Member Data Documentation

◆ bias_