atsci_viterbi_decoder Class Reference

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

#include <atsci_viterbi_decoder.h>

Collaboration diagram for atsci_viterbi_decoder:

Collaboration graph
[legend]

List of all members.

Public Member Functions

 atsci_viterbi_decoder ()
 ~atsci_viterbi_decoder ()
void reset ()
 reset all decoder states
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_tfifo [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]

const int atsci_viterbi_decoder::INPUT_SIZE = (ATSC_DATA_SEGMENT_LENGTH * 12) [static, protected]

const int atsci_viterbi_decoder::NCODERS = 12 [static]

const int atsci_viterbi_decoder::OUTPUT_SIZE = (SEGMENT_SIZE * 12) [static, protected]

const int atsci_viterbi_decoder::SEGMENT_SIZE = ATSC_MPEG_RS_ENCODED_LENGTH [static, protected]


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

Generated on Thu Mar 5 09:02:21 2009 for GNU Radio 3.1.3 by  doxygen 1.5.8