2022年6月16日 · 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.

Speex 1.2.0. This is the latest stable release of the Speex codec library. Downloads: Speex Source Code; SpeexDSP 1.2rc3. This brown-paper-bag release adds two headers that should have been included with SpeexDSP 1.2rc2.

The Speex manual provides an introduction to Speex and CELP coding, speexenc and speexdec information, libspeex API information, and miscellaneous format information. PDF Postscript

Speex modes have a query system similar to the speex_encoder_ctl and speex_decoder_ctl calls. Since modes are read-only, it is only possible to get information about a particular mode. The function used to do that is:

The Speex codec is designed to be very flexible and support a wide range of speech quality and bit-rate. Support for very good quality speech also means that Speex can encode wideband speech (16 kHz sampling rate) in addition to narrowband speech (telephone quality, 8 …

Speex for Windows Edmunt Pienkowsky's bundle of Speex for Windows, including an ACM codec that will get Speex to work in NetMeeting. Winamp and Cool Edit Plugins

Chapter 5 Speex Module Documentation 5.1 Speex encoder and decoder Classes • struct SpeexMode Defines • #define SPEEX_SET_ENH 0 • #define SPEEX_GET_ENH 1

Speex Samples (based on version 1.2-beta1) Samples coded with Speex have been decoded back to wav format so you don't need to have a Speex decoder to listen to them. Narrowband. These samples are coded using narrowband Speex mode (more bit-rates available) Male. original; coded 4 kbps; coded 4 kbps VBR; coded 6 kbps; coded 8 kbps; coded 8 kbps ...

Speex is a lossy codec, which means that it achives compression at the expense of fidelity of the input speech signal. Unlike some other speech codecs, it is possible to control the tradeoff made between quality and bit-rate.

Speex is available under the terms of the Xiph.Org variant of the BSD license, which is both an open source and free software license. Since there’s some confusion as to what this actually means to current and potential users of Speex, this page exists to clear up any misunderstandings.