ldpc.h File Reference

LDPC encoder/decoder header. More...

Go to the source code of this file.

Macros
#define	LPDC_METADATA_SEED   38545
#define	LPDC_MESSAGE_SEED   785465

Functions
jab_data *	encodeLDPC (jab_data *data, jab_int32 *coderate_params)
	LDPC encoding. More...
jab_int32	decodeLDPChd (jab_byte *data, jab_int32 length, jab_int32 wc, jab_int32 wr)
	LDPC decoding to perform hard decision. More...
jab_int32	decodeLDPC (jab_float *enc, jab_int32 length, jab_int32 wc, jab_int32 wr, jab_byte *dec)
	LDPC decoding to performe soft decision. More...

Detailed Description

LDPC encoder/decoder header.

libjabcode - JABCode Encoding/Decoding Library

Copyright 2016 by Fraunhofer SIT. All rights reserved. See LICENSE file for full terms of use and distribution.

Contact: Huajian Liu liu@s.nosp@m.it.f.nosp@m.raunh.nosp@m.ofer.nosp@m..de Waldemar Berchtold walde.nosp@m.mar..nosp@m.berch.nosp@m.told.nosp@m.@sit..nosp@m.frau.nosp@m.nhofe.nosp@m.r.de

Function Documentation

jab_int32 decodeLDPC	(	jab_float *	enc,
		jab_int32	length,
		jab_int32	wc,
		jab_int32	wr,
		jab_byte *	dec
	)

LDPC decoding to performe soft decision.

Parameters

enc	the probability value for each bit position
length	the encoded data length
wc	the number of '1's in each column
wr	the number of '1's in each row
dec	the decoded data

Returns

the decoded data length | 0: decoding error

jab_int32 decodeLDPChd	(	jab_byte *	data,
		jab_int32	length,
		jab_int32	wc,
		jab_int32	wr
	)

LDPC decoding to perform hard decision.

Parameters

data	the encoded data
length	the encoded data length
wc	the number of '1's in a column
wr	the number of '1's in a row

Returns

the decoded data length | 0: fatal error (out of memory)

jab_data* encodeLDPC	(	jab_data *	data,
		jab_int32 *	coderate_params
	)

LDPC encoding.

Parameters

data	the data to be encoded
coderate_params	the two code rate parameter wc and wr indicating how many '1' in a column (Wc) and how many '1' in a row of the parity check matrix

Returns

the encoded data | NULL if failed