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FixedAffineComponent Class Reference

FixedAffineComponent is an affine transform that is supplied at network initialization time and is not trainable. More...

#include <nnet-simple-component.h>

Inheritance diagram for FixedAffineComponent:
Collaboration diagram for FixedAffineComponent:

Public Member Functions

 FixedAffineComponent ()
 
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...
 
 FixedAffineComponent (const AffineComponent &c)
 
void Init (const CuMatrixBase< BaseFloat > &matrix)
 matrix should be of size input-dim+1 to output-dim, last col is offset More...
 
virtual void InitFromConfig (ConfigLine *cfl)
 Initialize, from a ConfigLine object. More...
 
virtual int32 Properties () const
 Return bitmask of the component's properties. 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 > &in_value, const CuMatrixBase< BaseFloat > &, const CuMatrixBase< BaseFloat > &out_deriv, void *memo, Component *to_update, 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 ComponentCopy () 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...
 
const CuMatrix< BaseFloat > & LinearParams () const
 
const CuVector< BaseFloat > & BiasParams () const
 
- 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 by. 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...
 
 Component ()
 
virtual ~Component ()
 

Protected Member Functions

 KALDI_DISALLOW_COPY_AND_ASSIGN (FixedAffineComponent)
 

Protected Attributes

CuMatrix< BaseFloatlinear_params_
 
CuVector< BaseFloatbias_params_
 

Friends

class AffineComponent
 

Additional Inherited Members

- Static Public Member Functions inherited from Component
static ComponentReadNew (std::istream &is, bool binary)
 Read component from stream (works out its type). Dies on error. More...
 
static ComponentNewComponentOfType (const std::string &type)
 Returns a new Component of the given type e.g. More...
 

Detailed Description

FixedAffineComponent is an affine transform that is supplied at network initialization time and is not trainable.

Definition at line 883 of file nnet-simple-component.h.

Constructor & Destructor Documentation

Definition at line 885 of file nnet-simple-component.h.

Referenced by FixedAffineComponent::Copy().

885 { }

Definition at line 2764 of file nnet-simple-component.cc.

2764  :
2765  linear_params_(c.LinearParams()),
2766  bias_params_(c.BiasParams()) { }

Member Function Documentation

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_infoThe component name, to be printed out in any warning messages.
[in]indexesA 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_valueThe matrix that was given as input to the Propagate function. Will be ignored (and may be empty) if Properties()&kBackpropNeedsInput == 0.
[in]out_valueThe matrix that was output from the Propagate function. Will be ignored (and may be empty) if Properties()&kBackpropNeedsOutput == 0
[in]out_derivThe derivative at the output of this component.
[in]memoThis 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_updateIf 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_derivThe 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 2776 of file nnet-simple-component.cc.

References CuMatrixBase< Real >::AddMatMat(), kaldi::kNoTrans, and FixedAffineComponent::linear_params_.

2783  {
2784  // kBackpropAdds is true. It's the user's responsibility to zero out
2785  // <in_deriv> if they need it to be so.
2786  if (in_deriv)
2787  in_deriv->AddMatMat(1.0, out_deriv, kNoTrans,
2788  linear_params_, kNoTrans, 1.0);
2789 }
void AddMatMat(Real alpha, const CuMatrixBase< Real > &A, MatrixTransposeType transA, const CuMatrixBase< Real > &B, MatrixTransposeType transB, Real beta)
C = alpha * A(^T)*B(^T) + beta * C.
Definition: cu-matrix.cc:1142
const CuVector<BaseFloat>& BiasParams ( ) const
inline
Component * Copy ( ) const
virtual

Copies component (deep copy).

Implements Component.

Definition at line 2791 of file nnet-simple-component.cc.

References FixedAffineComponent::bias_params_, FixedAffineComponent::FixedAffineComponent(), and FixedAffineComponent::linear_params_.

2791  {
2793  ans->linear_params_ = linear_params_;
2794  ans->bias_params_ = bias_params_;
2795  return ans;
2796 }
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 2720 of file nnet-simple-component.cc.

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

2720  {
2721  std::ostringstream stream;
2722  stream << Component::Info();
2723  PrintParameterStats(stream, "linear-params", linear_params_);
2724  PrintParameterStats(stream, "bias", bias_params_, true);
2725  return stream.str();
2726 }
virtual std::string Info() const
Returns some text-form information about this component, for diagnostics.
void PrintParameterStats(std::ostringstream &os, const std::string &name, const CuVectorBase< BaseFloat > &params, bool include_mean)
Print to 'os' some information about the mean and standard deviation of some parameters, used in Info() functions in nnet-simple-component.cc.
Definition: nnet-parse.cc:520
void Init ( const CuMatrixBase< BaseFloat > &  matrix)

matrix should be of size input-dim+1 to output-dim, last col is offset

Definition at line 2728 of file nnet-simple-component.cc.

References FixedAffineComponent::bias_params_, CuVectorBase< Real >::CopyColFromMat(), KALDI_ASSERT, FixedAffineComponent::linear_params_, CuMatrixBase< Real >::NumCols(), CuMatrixBase< Real >::NumRows(), CuMatrixBase< Real >::Range(), and CuVector< Real >::Resize().

Referenced by FixedAffineComponent::InitFromConfig().

2728  {
2729  KALDI_ASSERT(mat.NumCols() > 1);
2730  linear_params_ = mat.Range(0, mat.NumRows(), 0, mat.NumCols() - 1);
2731  bias_params_.Resize(mat.NumRows());
2732  bias_params_.CopyColFromMat(mat, mat.NumCols() - 1);
2733 }
void CopyColFromMat(const CuMatrixBase< Real > &mat, MatrixIndexT col)
Definition: cu-vector.cc:79
void Resize(MatrixIndexT dim, MatrixResizeType t=kSetZero)
Allocate the memory.
Definition: cu-vector.cc:892
CuSubMatrix< Real > Range(const MatrixIndexT row_offset, const MatrixIndexT num_rows, const MatrixIndexT col_offset, const MatrixIndexT num_cols) const
Definition: cu-matrix.h:532
#define KALDI_ASSERT(cond)
Definition: kaldi-error.h:169
void InitFromConfig ( ConfigLine cfl)
virtual

Initialize, from a ConfigLine object.

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

Implements Component.

Definition at line 2735 of file nnet-simple-component.cc.

References ConfigLine::GetValue(), ConfigLine::HasUnusedValues(), FixedAffineComponent::Init(), KALDI_ASSERT, KALDI_ERR, CuMatrixBase< Real >::NumRows(), CuMatrix< Real >::Read(), CuMatrixBase< Real >::SetRandn(), Input::Stream(), FixedAffineComponent::Type(), and ConfigLine::WholeLine().

2735  {
2736  std::string filename;
2737  // Two forms allowed: "matrix=<rxfilename>", or "input-dim=x output-dim=y"
2738  // (for testing purposes only).
2739  if (cfl->GetValue("matrix", &filename)) {
2740  if (cfl->HasUnusedValues())
2741  KALDI_ERR << "Invalid initializer for layer of type "
2742  << Type() << ": \"" << cfl->WholeLine() << "\"";
2743 
2744  bool binary;
2745  Input ki(filename, &binary);
2746  CuMatrix<BaseFloat> mat;
2747  mat.Read(ki.Stream(), binary);
2748  KALDI_ASSERT(mat.NumRows() != 0);
2749  Init(mat);
2750  } else {
2751  int32 input_dim = -1, output_dim = -1;
2752  if (!cfl->GetValue("input-dim", &input_dim) ||
2753  !cfl->GetValue("output-dim", &output_dim) || cfl->HasUnusedValues()) {
2754  KALDI_ERR << "Invalid initializer for layer of type "
2755  << Type() << ": \"" << cfl->WholeLine() << "\"";
2756  }
2757  CuMatrix<BaseFloat> mat(output_dim, input_dim + 1);
2758  mat.SetRandn();
2759  Init(mat);
2760  }
2761 }
virtual std::string Type() const
Returns a string such as "SigmoidComponent", describing the type of the object.
#define KALDI_ERR
Definition: kaldi-error.h:127
void Init(const CuMatrixBase< BaseFloat > &matrix)
matrix should be of size input-dim+1 to output-dim, last col is offset
#define KALDI_ASSERT(cond)
Definition: kaldi-error.h:169
virtual int32 InputDim ( ) const
inlinevirtual

Returns input-dimension of this component.

Implements Component.

Definition at line 902 of file nnet-simple-component.h.

References FixedAffineComponent::linear_params_, and CuMatrixBase< Real >::NumCols().

Referenced by ModelCollapser::CollapseComponentsAffine().

902 { return linear_params_.NumCols(); }
MatrixIndexT NumCols() const
Definition: cu-matrix.h:196
KALDI_DISALLOW_COPY_AND_ASSIGN ( FixedAffineComponent  )
protected
const CuMatrix<BaseFloat>& LinearParams ( ) const
inline
virtual int32 OutputDim ( ) const
inlinevirtual

Returns output-dimension of this component.

Implements Component.

Definition at line 903 of file nnet-simple-component.h.

References FixedAffineComponent::linear_params_, and CuMatrixBase< Real >::NumRows().

Referenced by ModelCollapser::CollapseComponentsAffine().

903 { return linear_params_.NumRows(); }
MatrixIndexT NumRows() const
Dimensions.
Definition: cu-matrix.h:195
void * Propagate ( const ComponentPrecomputedIndexes indexes,
const CuMatrixBase< BaseFloat > &  in,
CuMatrixBase< BaseFloat > *  out 
) const
virtual

Propagate function.

Parameters
[in]indexesA 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]inThe input to this component. Num-columns == InputDim().
[out]outThe 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 2768 of file nnet-simple-component.cc.

References CuMatrixBase< Real >::AddMatMat(), FixedAffineComponent::bias_params_, CuMatrixBase< Real >::CopyRowsFromVec(), kaldi::kNoTrans, kaldi::kTrans, and FixedAffineComponent::linear_params_.

2770  {
2771  out->CopyRowsFromVec(bias_params_); // Adds the bias term first.
2772  out->AddMatMat(1.0, in, kNoTrans, linear_params_, kTrans, 1.0);
2773  return NULL;
2774 }
void CopyRowsFromVec(const CuVectorBase< Real > &v)
This function has two modes of operation.
Definition: cu-matrix.cc:2146
void AddMatMat(Real alpha, const CuMatrixBase< Real > &A, MatrixTransposeType transA, const CuMatrixBase< Real > &B, MatrixTransposeType transB, Real beta)
C = alpha * A(^T)*B(^T) + beta * C.
Definition: cu-matrix.cc:1142
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 901 of file nnet-simple-component.h.

References kaldi::nnet3::kBackpropAdds, and kaldi::nnet3::kSimpleComponent.

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 2807 of file nnet-simple-component.cc.

References FixedAffineComponent::bias_params_, kaldi::nnet3::ExpectOneOrTwoTokens(), kaldi::nnet3::ExpectToken(), FixedAffineComponent::linear_params_, CuVector< Real >::Read(), and CuMatrix< Real >::Read().

2807  {
2808  ExpectOneOrTwoTokens(is, binary, "<FixedAffineComponent>", "<LinearParams>");
2809  linear_params_.Read(is, binary);
2810  ExpectToken(is, binary, "<BiasParams>");
2811  bias_params_.Read(is, binary);
2812  ExpectToken(is, binary, "</FixedAffineComponent>");
2813 }
void Read(std::istream &is, bool binary)
I/O.
Definition: cu-vector.cc:862
void ExpectOneOrTwoTokens(std::istream &is, bool binary, const std::string &token1, const std::string &token2)
This function is like ExpectToken but for two tokens, and it will either accept token1 and then token...
Definition: nnet-parse.cc:224
static void ExpectToken(const std::string &token, const std::string &what_we_are_parsing, const std::string **next_token)
void Read(std::istream &is, bool binary)
I/O functions.
Definition: cu-matrix.cc:459
virtual std::string Type ( ) const
inlinevirtual

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

Implements Component.

Definition at line 886 of file nnet-simple-component.h.

Referenced by FixedAffineComponent::InitFromConfig().

886 { return "FixedAffineComponent"; }
void Write ( std::ostream &  os,
bool  binary 
) const
virtual

Write component to stream.

Implements Component.

Definition at line 2798 of file nnet-simple-component.cc.

References FixedAffineComponent::bias_params_, FixedAffineComponent::linear_params_, CuVector< Real >::Write(), CuMatrixBase< Real >::Write(), and kaldi::WriteToken().

2798  {
2799  WriteToken(os, binary, "<FixedAffineComponent>");
2800  WriteToken(os, binary, "<LinearParams>");
2801  linear_params_.Write(os, binary);
2802  WriteToken(os, binary, "<BiasParams>");
2803  bias_params_.Write(os, binary);
2804  WriteToken(os, binary, "</FixedAffineComponent>");
2805 }
void Write(std::ostream &is, bool binary) const
Definition: cu-vector.cc:872
void WriteToken(std::ostream &os, bool binary, const char *token)
The WriteToken functions are for writing nonempty sequences of non-space characters.
Definition: io-funcs.cc:134
void Write(std::ostream &os, bool binary) const
Definition: cu-matrix.cc:467

Friends And Related Function Documentation

friend class AffineComponent
friend

Definition at line 925 of file nnet-simple-component.h.

Member Data Documentation


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