atsci_viterbi_decoder Class Reference

fancy, schmancy 12-way interleaved viterbi decoder for ATSC More...

#include <gnuradio/atsc/viterbi_decoder_impl.h>

Public Member Functions
	atsci_viterbi_decoder ()
	~atsci_viterbi_decoder ()
void	reset ()
	reset all decoder states More...
void	decode (atsc_mpeg_packet_rs_encoded out[NCODERS], const atsc_soft_data_segment in[NCODERS])

Static Public Attributes
static const int	NCODERS = 12

Protected Types
typedef interleaver_fifo < unsigned char >	fifo_t

Protected Member Functions
void	decode_helper (unsigned char out[OUTPUT_SIZE], const float in[INPUT_SIZE])

Protected Attributes
single_viterbi_t	viterbi [NCODERS]
fifo_t *	fifo [NCODERS]
bool	debug

Static Protected Attributes
static const int	SEGMENT_SIZE = ATSC_MPEG_RS_ENCODED_LENGTH
static const int	OUTPUT_SIZE = (SEGMENT_SIZE * 12)
static const int	INPUT_SIZE = (ATSC_DATA_SEGMENT_LENGTH * 12)

Detailed Description

fancy, schmancy 12-way interleaved viterbi decoder for ATSC

Member Typedef Documentation

typedef interleaver_fifo<unsigned char> atsci_viterbi_decoder::fifo_t

protected

Constructor & Destructor Documentation

atsci_viterbi_decoder::atsci_viterbi_decoder

(

)

atsci_viterbi_decoder::~atsci_viterbi_decoder

(

)

Member Function Documentation

void atsci_viterbi_decoder::decode	(	atsc_mpeg_packet_rs_encoded	out[NCODERS],
		const atsc_soft_data_segment	in[NCODERS]
	)

Take 12 data segments of soft decisions (floats) and produce 12 RS encoded data segments. We work in groups of 12 because that's the smallest number of segments that composes a single full cycle of the decoder mux.

void atsci_viterbi_decoder::decode_helper ( unsigned char  out[OUTPUT_SIZE], const float  in[INPUT_SIZE]  )

protected

void atsci_viterbi_decoder::reset

(

)

reset all decoder states

Member Data Documentation

bool atsci_viterbi_decoder::debug

protected

fifo_t* atsci_viterbi_decoder::fifo[NCODERS]

protected

const int atsci_viterbi_decoder::INPUT_SIZE = (ATSC_DATA_SEGMENT_LENGTH * 12)

staticprotected

const int atsci_viterbi_decoder::NCODERS = 12

static

const int atsci_viterbi_decoder::OUTPUT_SIZE = (SEGMENT_SIZE * 12)

staticprotected

const int atsci_viterbi_decoder::SEGMENT_SIZE = ATSC_MPEG_RS_ENCODED_LENGTH

staticprotected

single_viterbi_t atsci_viterbi_decoder::viterbi[NCODERS]

protected

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

• viterbi_decoder_impl.h