CalcStatesDV

Calculates the states of the Viterbi decoder.

Syntax

IppStatus ippsCalcStatesDV_16sc(const Ipp16u* pathError, const Ipp8u* pNextState, Ipp16u* pBranchError, const Ipp16s* pCurrentSubsetPoint, Ipp16s* pPathTable, int state, int presentIndex);

Parameters

pPathError	Pointer to the table of path error metrics.
pNextState	Pointer to the next state table.
pBranchError	Pointer to the branch error table.
pCurrentSubsetPoint	Pointer to the current 4D subset.
pPathTable	Pointer to the Viterbi path table.
state	Number of states of a convolutional encoder.
presentIndex	Start index in Viterbi path table.

Description

The function ippsCalcStatesDV is declared in the ipps.h file. This function computes the possible states of the Viterbi decoder and fills the table of the accumulated errors pPathError and the working Viterbi path table pPathTable.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when any of the specified pointers is NULL.