Description for Speex 1.2 Beta 3
What's New in This Release:
- All non-codec components (preprocessor, echo cancellation, jitter buffer) have been moved to a new libspeexdsp library
- New jitter buffer algorithm and resampler improvements/fixes
- First release where libspeex can be built without any floating point support
Designed for compressing voice at low bitrates
Speex is an Open Source/Free Software patent-free audio compression format designed for speech.
The Speex Project aims to lower the barrier of entry for voice applications by providing a free alternative to expensive proprietary speech codecs. Moreover, Speex is well-adapted to Internet applications and provides useful features that are not present in most other codecs.
Speex is a useful audio compression utility that will come in handy. Speex is based on CELP and is designed to compress voice at bitrates ranging from 2 to 44 kbps.
Here are some key features of "Speex":
- Narrowband (8 kHz), wideband (16 kHz), and ultra-wideband (32 kHz) compression in the same bitstream
- Intensity stereo encoding
- Packet loss concealment
- Variable bitrate operation (VBR)
- Voice Activity Detection (VAD)
- Discontinuous Transmission (DTX)
- Fixed-point port
- Acoustic echo canceller
- Noise suppression
Note that Speex has a number of features that are not present in other codecs, such as intensity stereo encoding, integration of multiple sampling rates in the same bitstream (embedded coding), and a VBR mode.
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