Oracle interMedia User's Guide and Reference
Release 9.0.1

Part Number A88786-01
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A
Audio File and Compression Formats

A.1 Supported Audio File and Compression Formats

The following tables describe the audio file and compression formats and other audio features supported by interMedia.

To use these tables, find the data format you are interested in, and then determine the supported formats. For example, Table A-1 shows that interMedia supports AIFF format for single channel, stereo, 8-bit and 16-bit samples, linear PCM encoding, and uncompressed format.

Table A-1 AIFF Data Format
Format  Audio Feature 

AIFF

Format ID `AIFF'
File Format: `AIFF'
File Ext: .aff
MIME type: audio/x-aiff 

Single channel
Stereo
8-bit samples
16-bit samples
Linear PCM encoding 

Format  Encoding/CompressionType 

Standard AIFF Uncompressed 

TWOS 

Table A-2 AIFF-C Data Format
Format  Audio Feature 

AIFF-C

Format ID `AIFC'
File Format: `AIFC'
File Ext: .afc
MIME type: audio/x-aiff 

Single channel
Stereo
8-bit samples
16-bit samples 

Format  Encoding/CompressionType 

Choose one of these compression formatsFoot 1
Not compressed
ACE 2-to-1
ACE 8-to-3
MACE 3-to-1
MACE 6-to-1 



Uncompressed (TWOS)
ACE2
ACE8
MAC3
MAC6 

1 Other than "uncompressed (TWOS)", all other codes are the FourCC (uppercased) directly from the compressionType field of Common Chunk of the AIFC file. The table lists only the ones known.
Table A-3 AU Data Format
Format  Audio Feature 

AU

Format ID `AUFF'
File Format: `AUFF'
File Ext: .au
MIME type: audio/basic 

Single channel
Stereo
8-bit samples
16-bit samples
Mu-law encoding
Linear PCM encoding 

Format  Encoding/CompressionType 

Choose one of these compression formats:
Unspecified format
8-bit mu-law samples
8-bit linear samples
16-bit linear samples
24-bit linear samples
32-bit linear samples
Floating-point samples
Double-precision float samples
Fragmented sample data
Nested format 


UNSPECIFIED
MULAW
LINEAR
LINEAR
LINEAR
LINEAR
FLOAT
DOUBLE
FRAGMENTED
NESTED 

DSP program
8-bit fixed-point samples
16-bit fixed-point samples
24-bit fixed-point samples
32-bit fixed-point samples
Unknown AU's format
Non-audio display data
Squelch format
16-bit linear with emphasis
16-bit linear with compression 

DSP_CORE
DSP_DATA
DSP_DATA
DSP_DATA
DSP_DATA
UNKNOWN
DISPLAY
MULAW_SQUELCH
EMPHASIZED
COMPRESSED 

16-bit linear with emphasis and compression
Music Kit DSP commands
DSP commands samples
adpcm G721
adpcm G722
adpcm G723_3
adpcm G723_5
8-bit a-law samples 

COMPRESSED_EMPHASIZED
DSP_COMMANDS
DSP_COMMANDS_SAMPLES
ADPCM_G721
ADPCM_G722
ADPCM_G723_3
ADPCM_G723_5
ALAW 

Table A-4 WAV Data Format
Format  Audio Feature 

WAV

Format ID `WAVE'
File Format: `WAVE'
File Ext: .wav
MIME type: audio/x-wav 

Single channel
Stereo
8-bit samples
16-bit samples
Linear PCM encoding 

Format   Encoding/CompressionType 

Choose one of these compression formats:

Unknown Wave Format
Microsoft PCM Wave Format 



UNKNOWN
MS_PCM 

Microsoft ADPCM Wave Format
IBM CVSD Wave Format
Microsoft aLaw Wave Format
Microsoft uLaw Wave Format
OKI ADPCM Wave Format
Intel DVI/IMA ADPCM Wave Format
VideoLogic Media Space ADPCM Wave Format
Sierra Semiconductor ADPCM Wave Format
Antex Electronics G723 ADPCM Wave Format
DSP Solutions DIGISTD Wave Format 

MS_ADPCM
IBM_CVSD
ALAW
MULAW
OKI_ADPCM
DVI_ADPCM
MEDIASPACE_ADPCM
SIERRA_ADPCM
ANTEX_G723_ADPCM
DIGISTD 

DSP Solutions DIGIFIX Wave Format
Dialogic OKI ADPCM Wave Format
Yamaha ADPCM Wave Format
Speech Compression Sonarc Wave Format
DSP Group TrueSpeech Wave Format
Echo Speech Wave Format
Audiofile AF36 Wave Format
Audio Processing Technology Wave Format
Audiofile AF10 Wave Format
Dolby AC-2 Wave Format 

DIGIFIX
DIALOGIC_OKI_ADPCM
YAMAHA_ADPCM
SONARC
DSPGROUP_TRUESPEECH
ECHOSC1
AUDIOFILE_AF36
APTX
AUDIOFILE_AF10
DOLBY_AC2 

Microsoft GSM 610 Wave Format
Antex Electronics ADPCME Wave Format
Control Resources VQLPC Wave Format
DSP Solutions DIGIREAL Wave Format
DSP Solutions DIGIADPCM Wave Format
Control Resources CR10 Wave Format
Natural Microsystems NMS VBXADPCM Wave Format
Crystal Semiconductor IMA ADPCM Wave Format
Antex Electronics G721 ADPCM Wave Format
MPEG-1 Audio Wave Format 

MS_GSM610
ANTEX_ADPCME
CONTROL_RES_VQLPC
DIGIREAL
DIGIADPCM
CONTROL_RES_CR10
NMS_VBXADPCM
CS_IMAADPCM
ANTEX_G721_ADPCM
MPEG 

Creative Labs ADPCM Wave Format
Creative Labs FastSpeech8 Wave Format
Creative Labs FastSpeech10 Wave Format
Fujitsu FM Towns Wave Format
Olivetti GSM Wave Format
Olivetti ADPCM Wave Format
Olivetti CELP Wave Format
Olivetti SBC Wave Format
Olivetti OPR Wave Format 

CREATIVE_ADPCM
CREATIVE_FASTSPEECH8
CREATIVE_FASTSPEECH10
FM_TOWNS_SND
OLIGSM
OLIADPCM
OLICELP
OLISBC
OLIOPR 

Table A-5 Audio MPEG Data Format
Format  Audio Feature 

MPEG

Format ID `MPEG'
File Format: `MPGA'
File Ext: .mpg
MIME type: audio/mpeg 

Layer I
Layer II
Layer III 

Format  Encoding/CompressionType 

Choose one of these compression formats:
MPEG Audio, Layer I
MPEG Audio, Layer II
MPEG Audio, Layer III 



LAYER1
LAYER2
LAYER3 


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