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Audio Formats

and Length

Norcom Solutions Group - Audio Formats and Length

Supported Audio Formats

Heavy audio compression may result in fidelty loss and may have strong impact on transcript accuracy. For best accuracy results, Norcom Solutions Group recommends the following codecs:

  • G711

  • Un-compressed PCM WAV



Norcom Solutions Group is also capable of extracting audio from these media file formats. Accuracy loss is expected if the audio formats contains heavy compression.


Supported video/audio codec:

- (S)VCD (Super Video CD)
- CDRwin's .bin image file
- AVI file format
- ASF/WMV/WMA format
- QT/MOV/MP4 format
- RealAudio/RealVideo format
- Ogg/OGM files
- Matroska
- VIVO format
- FLI format
- NuppelVideo format
- yuv4mpeg format
- FILM (.cpk) format
- RoQ format
- PVA format

Supported audio codec:

- MPEG layer 1, 2, and 3 (MP3) audio
- AC3/A52, E-AC3, DTS (Dolby Digital) audio (software or SP/DIF)
- AAC (MPEG-4 audio)
- WMA (DivX Audio) v1, v2
- WMA 9 (WMAv3), Voxware audio, etc (using x86 DLLs)
- RealAudio: COOK, SIPRO, ATRAC3 (using Real libraries)
- RealAudio: DNET and older codecs
- QuickTime: Qclp, Q-Design QDMC/QDM2, MACE 3/6 (using QT libraries), ALAC
- Ogg Vorbis audio
- VIVO audio (g723, Vivo Siren) (using x86 DLL)
- alaw/ulaw, (ms)gsm, pcm, *adpcm and other simple old audio formats
- 3gp, amr

Audio Length

Voicemail-to-text: for effective processing and responsive service, unless otherwise agreed, Norcom Solutions Group processes only first two minutes of any voicemail audio received.

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