Oracle interMedia Audio, Image, and Video User's Guide and Reference
Release 8.1.6
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A
Audio File and Compression Formats

A.1 Supported Audio File and Compression Formats

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

To use these tables, find the data format you are interested in, and then determine the supported formats. For example, Table shows that interMedia audio 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 formats¹ 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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