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asptRlslattice32f
API Summary
API to create and delete an asptRlslattice32f filter
API to filter and update an asptRlslattice32f filter
API to retrieve the properties of an asptRlslattice32f filter
- DT32S rlslattice32fGetCoef(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
- DT32S rlslattice32fGetForwardParcors(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
- DT32S rlslattice32fGetBackwardParcors(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
- DT32S rlslattice32fGetDelayLine(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
- rlslattice32fGetCoefPtr( asptRlslattice32f
*rlsl )
- rlslattice32fGetForwardParcorPtr( asptRlslattice32f
*rlsl )
- rlslattice32fGetBackwardParcorPtr( asptRlslattice32f
*rlsl )
- rlslattice32fGetDelayLinePtr( asptRlslattice32f
*rlsl )
- rlslattice32fGetFilterLength( asptRlslattice32f
*rlsl )
- rlslattice32fGetForgetFactor( asptRlslattice32f
*rlsl )
- rlslattice32fGetLastErrorSample( asptRlslattice32f
*rlsl )
API to set the properties of an asptRlslattice32f filter
Description
Implements the Recursive Least Squares Lattice joint process estimator using the a posteriori estimation errors.
Copyright
Copyright (c) DSP ALGORITHMS 2003; all rights reserved.
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rlslattice32fInit
DT32S rlslattice32fInit(asptRlslattice32f *rlsl, DT32S L, DT32F mu)
Initializes an asptRlslattice32f filter and allocates its necessary storage buffers - Returns :
-
Error code. On failure, the filterLength member of the filter is set to zero.
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter to be initializes
- L : number of linear combiner coefficients
- mu : forgetting factor
- Output Parameters :
- rlsl is initialized using the given input arguments.
- Error Conditions
- ASPT_NO_ERR : Initialization is successful
- ASPT_NULL_PTR_ERR : rlsl is a NULL pointer
- ASPT_RANGE_ERR : L is not a valid input value
- ASPT_NO_MEM_ERR : could not allocate memory
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rlslattice32fInitStatic
DT32S rlslattice32fInitStatic(asptRlslattice32f *rlsl, DT32S L, DT32F mu, DT32F *pCof, DT32F *pDat)
Initializes an asptRlslattice32f filter to use pre-allocated memory blocks - Returns :
-
Error code. On failure, the filterLength member of the filter is set to zero.
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter to be initialized
- L : number of linear combiner coefficients
- mu : forgetting factor
- pCof : pointer to a pre-allocated memory in program memory
of at least [3*len] DT32F locations to be used for the filter/PARCOR coefficients.
- pDat : pointer to a pre-allocated memory in data memory of at least
[6*len] DT32F locations to be used for data storage.
- Output Parameters :
- rlsl is initialized using the given input arguments.
- Error Conditions
- ASPT_NO_ERR : Initialization is successful
- ASPT_NULL_PTR_ERR : rlsl/pCof/pDat is a NULL pointer
- ASPT_RANGE_ERR : len is not a valid input value
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rlslattice32fFilterUpdate
DT32F rlslattice32fFilterUpdate(asptRlslattice32f *rlsl, DT32F x, DT32F d)
Calculates the filter output and updates the PARCOR and linear combiner coefficients of an asptRlslattice32f filter. - Returns :
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter.
- x : input sample.
- d : desired sample.
- Remarks :
-
The error sample is stored internally and can be retrieved by calling rlslattice32fGetLastErrorSample().
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rlslattice32fFilterOnly
DT32F rlslattice32fFilterOnly(asptRlslattice32f *rlsl, DT32F x)
Calculates the filter output but does not updates the PARCOR nor the linear combiner coefficients. It updates the internal buffers. - Returns :
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter.
- x : input sample.
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rlslattice32fFree
void rlslattice32fFree(asptRlslattice32f *rlsl)
Frees the allocated memory for this asptRlslattice32f filter. - Returns :
- Input Parameters :
- rlsl : pointer to the rlsl filter
- Remarks :
-
Use this function only for asptRlslattice32f filters created using rlslattice32fInit(). Do not use with filters created with rlsLattice32fInitStatic().
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rlslattice32fReset
DT32S rlslattice32fReset(asptRlslattice32f *rlsl)
Resets all internal filter states to pre-defined initial state.- Returns :
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter to be reset
- Error Conditions
- ASPT_NO_ERR : success
- ASPT_NULL_PTR_ERR : NULL pointer error
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rlslattice32fGetCoef
DT32S rlslattice32fGetCoef(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
Copies N internal linear combiner coefficients starting from coef[ind] to dstBuf. - Returns :
-
On success returns the number of coefficients copied, otherwise the error code (negative int).
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter.
- dstBuf : pointer to the destination buffer.
- ind : index to the first coefficient to be copied.
- N : number of coefficients to be copied.
- flip : if 1, will flip the coefficients order
- Error Conditions
- ASPT_NULL_PTR_ERR : dstBuf/rlsl is a NULL pointer
- ASPT_RANGE_ERR : ind/N is not a valid input value
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rlslattice32fGetForwardParcors
DT32S rlslattice32fGetForwardParcors(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
Copies N internal forward PARKOR coefficients starting from coef[ind] to dstBuf. - Returns :
-
On success returns the number of coefficients copied, otherwise the error code (negative int).
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter.
- dstBuf : pointer to the destination buffer.
- ind : index to the first coefficient to be copied.
- N : number of coefficients to be copied.
- flip : if 1, will flip the coefficients order
- Error Conditions
- ASPT_NULL_PTR_ERR : dstBuf/rlsl is a NULL pointer
- ASPT_RANGE_ERR : ind/N is not a valid input value
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rlslattice32fGetBackwardParcors
DT32S rlslattice32fGetBackwardParcors(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
Copies N internal backward PARKOR coefficients starting from coef[ind] to dstBuf. - Returns :
-
On success returns the number of coefficients copied, otherwise the error code (negative int).
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter.
- dstBuf : pointer to the destination buffer.
- ind : index to the first coefficient to be copied.
- N : number of coefficients to be copied.
- flip : if 1, will flip the coefficients order
- Error Conditions
- ASPT_NULL_PTR_ERR : dstBuf/rlsl is a NULL pointer
- ASPT_RANGE_ERR : ind/N is not a valid input value
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rlslattice32fGetDelayLine
DT32S rlslattice32fGetDelayLine(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
Copies the N internal backward prediction error samples starting from delayLine[ind] sample to the given array. - Returns :
-
On success returns the number of samples copied, otherwise the error code (negative int).
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter.
- dstBuf : pointer to the destination buffer.
- ind : index to the first sample to be copied.
- N : number of samples to be copied.
- flip : if 1, will flip the samples order.
- Error Conditions
- ASPT_NULL_PTR_ERR : newCoef/rlsl is a NULL pointer
- ASPT_RANGE_ERR : ind/N is not a valid input value
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rlslattice32fSetDelayLine
DT32S rlslattice32fSetDelayLine(asptRlslattice32f *rlsl, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
Initializes N internal backward prediction error samples starting from delayLine[ind] to the contents of newBuf. - Returns :
-
On success returns the number of samples copied, otherwise the error code (negative int).
- Input Parameters :
- rlsl : pointer to asptRlslattice32f filter to be set.
- newBuf : pointer to the new PARCOR vector.
- ind : index to the first coefficient to be set.
- N : number of coefficients to be set.
- flip : if 1, will flip the coefficients order.
- Error Conditions
- ASPT_NULL_PTR_ERR : newBuf/rlsl is a NULL pointer
- ASPT_RANGE_ERR : ind/N is not a valid input value
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rlslattice32fResize
DT32S rlslattice32fResize(asptRlslattice32f *rlsl, DT32S newLength)
Resizes an asptRlslattice32f filter keeping as much of the filter state as possible. - Returns :
- Input Parameters :
- rlsl : pointer to the asptRlslattice32f filter to be resized.
- newLen : required new filter length.
- Error Conditions
- ASPT_NO_ERR : Resizing is successful
- ASPT_NULL_PTR_ERR : NULL pointer error
- ASPT_RANGE_ERR : newLength is not a valid input value
- ASPT_NO_MEM_ERR : Could not allocate the necessary filter storage
- Remarks :
-
Use this function only with dynamically allocated asptRlslattice32f filters.