Test patterns for ISO/MPEG Layer II
===================================


This directory contains 7 pairs of files with test patterns 
(one encoded bitstream, generated by a reference encoder 
and the corresponding decoded PCM output, generated by a 
reference decoder).

These data are intended for conformance testing of an ISO/MPEG Layer II
decoder implementation according to the ISO/IEC international standard 
IS 11172 (part 3 - audio). The conformance testing is described in part 4
of this standard.

The Layer II test data in this directory has been generated by:

	Institut fuer Rundfunktechnik (IRT)
	Floriansmuehlstr. 60
	D-80939 Muenchen
	GERMANY

Contact at IRT: Gerhard Stoll, 
		email: stoll@irt.de
		phone: +49-89-32399-347
		fax:   +49-89-32399-351

In the following, you find a description of the test patterns.
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For the input files, one byte is put on one line. Each 4 bits are 
translated into one hex character, i.e. 2 characters per line.

For the output files, one output sample is put on one line. The samples
are represented with 24 bits accuracy, each 4 bits are translated into 
one hex character, i.e. 6 characters on one line.
For stereo output, the left and right output samples are interleaved,
so the left samples are on the even lines (starting to count with line 0),
the right samples are on the odd lines.
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1.0  sweep32

 	Frames: 		49
	Bitrate: 		192 kbit/s 
	Sampling Frequency:	32 kHz
	Mode: 			switching each frame between stereo,
                                Joint-Stereo bound 4, bound 8, bound 12,
                                bound 16
	Att:			0.1
	CRC:			yes
	Signal:			sweep, -20 dB, 20 Hz - 15kHz

	Filenames: fl10.mpg (encoded bitstream)
		   fl10.pcm (decoded PCM output)






1.1 sweep44

 	Frames: 		49
	Bitrate: 		192 kbit/s 
	Sampling Frequency:	44.1 kHz
	Mode: 			switching each frame between stereo,
                                Joint-Stereo bound 4,bound 8, bound 12,
                                bound 16
	Att:			0.1
	CRC:			yes
	Signal:			sweep, -20 dB, 20 Hz - 20kHz

	Filenames: fl11.mpg (encoded bitstream)
		   fl11.pcm (decoded PCM output)




1.2  sweep48

 	Frames: 		49
	Bitrate: 		192 kbit/s 
	Sampling Frequency:	48 kHz
	Mode: 			switching each frame between stereo,
                                Joint-Stereo bound 4, bound 8, bound 12,
                                bound 16
	Att:			0.1
	CRC:			yes
	Signal:			sweep, -20 dB, 20 Hz - 20kHz

	Filenames: fl12.mpg (encoded bitstream)
		   fl12.pcm (decoded PCM output)




1.3 sweepm

 	Frames: 		49
	Bitrate: 		32 kbit/s 
	Sampling Frequency:	32 kHz
	Mode: 			single channel
	Att:			0.1
	CRC:			no
	Signal:			sweep, -20 dB, 20 Hz - 15kHz

	Filenames: fl13.mpg (encoded bitstream)
		   fl13.pcm (decoded PCM output)




1.4 dual

 	Frames: 		16
	Bitrate: 		384 kbit/s 
	Sampling Frequency:	48 kHz
	Mode: 			dual channel
	Att:			0.89 
	CRC:			yes
	Signal:			I: 	sine 1kHz, -1 dB
				II:	sine 2kHz, -1 dB
				Output in two different signals

	Filenames: fl14.mpg (encoded bitstream)
		   fl14.pcm (decoded PCM output)




1.5 noise

 	Frames: 		16
	Bitrate: 		384 kbit/s 
	Sampling Frequency:	48 kHz
	Mode: 			stereo
	Att:			0.79 
	CRC:			yes
	Signal:			noise, -2 dB,  
				all possible bitallocation indices are 
				as following:

	Frame	 0  1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
	----------------------------------------------------------------------
	 Sb0	15 14  13  12  11  10   9   8   7   6   5   4   3   2   1   0
	 Sb2	15 14  13  12  11  10   9   8   7   6   5   4   3   2   1   0
	 Sb3	 0  1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
	 Sb10	 0  1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
	 Sb11	 0  0   0   0   0   0   0   0   7   6   5   4   3   2   1   0
	 Sb22	 0  0   0   0   0   0   0   0   7   6   5   4   3   2   1   0
	 Sb23	 0  0   0   0   0   0   0   0   0   0   0   0   0   1   2   3
	 Sb26	 0  0   0   0   0   0   0   0   0   0   0   0   0   1   2   3

	All the Sb's, which are not mentioned, are not allocated.

	Filenames: fl15.mpg (encoded bitstream)
		   fl15.pcm (decoded PCM output)




1.6 mult

 	Frames: 		63
	Bitrate: 		256 kbit/s 
	Sampling Frequency:	48 kHz
	Mode: 			stereo
	Att:			1.0 
	CRC:			yes
	Signal:			sine at 100Hz, 1000Hz and 10kHz, -20 dB
				all possible scalefactors in sb 0, sb 1, 
				sb 13, switching each frame
	
	Filenames: fl16.mpg (encoded bitstream)
		   fl16.pcm (decoded PCM output)




_____________________________________________________________________________
Hendrik Fuchs
Universitaet Hannover
Institut fuer Theoretische Nachrichtentechnik und Informationsverarbeitung
Appelstrasse 9A, D-30167 Hannover, Germany

fuchs@tnt.uni-hannover.de   phone: +49-511-762-5329   fax: +49-511-762-5333
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