SPUC: SPUC::viterbi Class Reference

SPUC 3.0

A Viterbi decoder (for DVB) More...

#include <viterbi.h>

Public Member Functions
	viterbi ()

void	reset ()

bool	clock (long value)

bool	decode (long s0, long s1)

void	minimize_metrics ()

bool	depuncture (const long steal, long soft_in)

Public Attributes
bool	decoded

bool	enable_output

bool	output_ready

long	prev_value

viterbi_state *	state0

viterbi_state *	state1

viterbi_state *	state

viterbi_state *	next

int	bitcnt

int	beststate

long	depuncture_bit_number

bool	phase

Detailed Description

A Viterbi decoder (for DVB)

The two generator polynomials for the NASA Standard K=7 code. Since these polynomials are known to be optimal for this constraint length there is not much point in changing them. But if you do, you will have to regenerate the BUTTERFLY macro calls in viterbi()

Author: Tony Kirke, Copyright(c) 2001; Tony Kirke

Constructor & Destructor Documentation

SPUC::viterbi::viterbi ( )

inline

References reset(), state0, and state1.

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Member Function Documentation

bool SPUC::viterbi::clock ( long value )

inline

References decode(), and decoded.

Referenced by depuncture().

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bool SPUC::viterbi::decode	(	long	s0,
		long	s1
	)

References beststate, bitcnt, BUTTERFLY, enable_output, next, state, state0, and state1.

Referenced by clock().

bool SPUC::viterbi::depuncture	(	const long	steal,
		long	soft_in
	)

References clock(), depuncture_bit_number, and phase.

Referenced by SPUC::qam_conv_decoder::data_decode().

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void SPUC::viterbi::minimize_metrics ( )

inline

References beststate.

void SPUC::viterbi::reset ( void )

inline

References state0, and state1.

Referenced by SPUC::qam_conv_decoder::reset(), and viterbi().

Member Data Documentation

int SPUC::viterbi::beststate

Referenced by decode(), and minimize_metrics().

int SPUC::viterbi::bitcnt

Referenced by decode().

bool SPUC::viterbi::decoded

Referenced by clock().

long SPUC::viterbi::depuncture_bit_number

Referenced by depuncture().

bool SPUC::viterbi::enable_output

Referenced by decode().

viterbi_state * SPUC::viterbi::next

Referenced by decode().

bool SPUC::viterbi::output_ready

Referenced by SPUC::qam_conv_decoder::data_decode().

bool SPUC::viterbi::phase

Referenced by depuncture().

long SPUC::viterbi::prev_value

viterbi_state * SPUC::viterbi::state

Referenced by decode().

viterbi_state* SPUC::viterbi::state0

Referenced by decode(), reset(), and viterbi().

viterbi_state * SPUC::viterbi::state1

Referenced by decode(), reset(), and viterbi().

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