aifccompress(1)						       aifccompress(1)

NAME    [Toc]    [Back]

     aifcdecompress - decompress the audio data	in an AIFF-C file

SYNOPSIS    [Toc]    [Back]

     aifcdecompress [-verbose] infile.aifc outfile.aifc

DESCRIPTION    [Toc]    [Back]

     aifcdecompress is a command-line program which reads an AIFF-C compressed
     digital audio input file, and copies the header information and sample
     data to a AIFF-C uncompressed digital audio output	file.


     The output	file will contain copies of all	the AIFF-C chunks in the
     original input file. The chunks may not appear in exactly the same	order
     as	in the original	file.


     aifcdecompress decodes data which has been	compressed using one of	the
     algorithms	supported by the SGI audio file	library:


     G.722    CCITT G.722 ADPCM	4:1 compression	recommended for	16-kHz,	16-bit
	      mono or stereo data.  The	compression algorithm currently	cannot
	      handle more than two channels.


     mu-law   CCITT G.711 mu-law 2:1 compression recommended for 8-kHz,	16-bit
	      (mono or multichannel) data.


     A-law    CCITT G.711 A-law	2:1 compression	recommended for	8-kHz, 16-bit
	      (mono or multichannel) data.


     Aware MPEG
	      MPEG I layer 1 or	2 audio	compression implemented	by Aware, Inc.
	      for 32, 44.1, or 48 kHz mono or stereo 16-bit data.



     Aware MultiRate
	      Aware proprietary	MultiRate near-lossless	or lossless audio
	      compression.  for	mono or	stereo 16-bit data at any rate.



     If	the input AIFF-C file parses correctly,	and the	output file is written
     with no errors, aifcdecompress returns 0. If there	is an error,
     aifcdecompress returns 1.




									Page 1






aifccompress(1)						       aifccompress(1)



     If	invoked	with no	arguments, aifcdecompress displays help.


     If	the verbose option is specified, aifcdecompress	periodically prints
     messages as sample	data is	copied from the	input file to the output file.


     The AIFF and AIFF-C file format specifications are	published by Apple
     Computer Inc.

AUTHOR    [Toc]    [Back]

     Silicon Graphics Inc.

SEE ALSO    [Toc]    [Back]

     playaifc(1), recordaifc(1),
     aiff2aifc(1), aifccompress(1),
     dmconvert(1), mediaconvert(1),
     AIFF-C File Format	Specification
     AFintro(3A), Introduction to the Audio File Library
     aware(5)


									PPPPaaaaggggeeee 2222