| Name |
Description |
| MP3 |
MPEG
Layer-3 format. Very popular format for keeping
of music. |
| Ogg
|
Ogg Vorbis
format. |
| Wave |
PCM.
Standard Windows WAV format for non-compressed
audio files. Pulse Code Modulation (PCM) is the
standard method of digitally encoding audio. It
is the basic uncompressed data format used in
file types such as Windows .wav. |
| WMA |
Windows
Media Audio format. A special type of advanced
streaming format file for use with audio content
encoded with the Windows Media Audio codec. The
.wma extension indicates a file format and how
the content is encoded. |
| ADPCM |
Compressed WAV format.
ADPCM (Adaptive Differential Pulse Code Modulation)
is an audio compression scheme which compresses
from 16-bit to 4-bit for a 4:1 compression ratio. |
| GSM |
Compressed
WAV format. Good for keeping of human speech. |
| DSP |
Compressed
WAV format. DSP Group True Speech (TM) format. |
| VOX |
Dialogic
ADPCM format. The Dialogic ADPCM format is commonly
found in telephony applications, and has been
optimized for low sample rate voice. It will only
save mono 16-bit audio, and like other ADPCM formats,
it compresses to 4-bits/sample (for a 4:1 ratio).
This format has no header, so any file format
with the extension .VOX will be assumed to be
in this format. |
| U-LAW |
Compressed
WAV format. u-Law (or CCITT standard G.711) is
an audio compression scheme and international
standard in telephony applications. u-Law is very
similar to A-Law, a variation of u-Law found in
European systems. This encoding format compresses
original 16-bit audio down to 8 bits (for a 2:1
compression ratio) with a dynamic range of about
13-bits. Thus, u-Law encoded waveforms have a
higher s/n ratio than 8-bit PCM, but at the price
of a bit more distortion than the original 16-bit
audio. The quality is higher than you would get
with 4-bit ADPCM formats. Encoding and decoding
is rather fast and generally, widely supported. |
| MP2 |
MPEG
Layer-2 format. |
| G.721 |
Used
for computer telephony. Good for keeping of human
speech. |
| G.723 |
Used
for computer telephony. Good for keeping of human
speech. |
| G.726 |
Used
for computer telephony. Good for keeping of human
speech. |
| A-LAW |
Compressed WAV format. A-Law (or
CCITT standard G.711) is an audio compression scheme
common in telephony applications. It is a slight
variation of the u-Law compression format, and is
found in European systems. This encoding format
compresses original 16-bit audio down to 8 bits
(for a 2:1 compression ratio) with a dynamic range
of about 13-bits. Thus, a-law encoded waveforms
have a higher s/n ratio than 8-bit PCM, but at the
price of a bit more distortion than the original
16-bit audio. The quality is higher than you would
get with 4-bit ADPCM formats. Encoding and decoding
is rather fast and generally, widely supported. |
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