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Speex: a free codec for free speech
Speex: A Free Codec For Free Speech Overview. 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 …
SPEEX is a free audio codec | EMCU
http://www.emcu.eu/2017/04/01/speex-is-a-free-audio-codec/
Speex is a free audio codec which provides high level of compression with good sound quality for speech encoding and decoding. Concepts Before introducing all the Speex features, here are some con cepts in speech coding that …
Speex Audio Codec, Version 1.2
https://www.loc.gov/preservation/digital/formats/fdd/fdd000259.shtml
Speex Audio Codec, Version 1.2. Description. Speech codec designed for packet networks and voice over IP (VoIP) applications but not for mobile phones. File-based compression is also supported. The flexible codec is based on Code Excited Linear Prediction (CELP) and supports a wide range of speech quality and bit-rates.
Ogg Speex Audio Format - loc.gov
https://www.loc.gov/preservation/digital/formats/fdd/fdd000260.shtml
Ogg Speex Audio Format: Description: File format and bitstream encoding for for spoken content, targeted at a wide range of devices other than mobile phones. Production phase: Generally used for final-state, end-user delivery. Relationship to other formats; Subtype of:
Vocoder demonstration using a Speex audio codec …
https://www.st.com/resource/en/application_note/cd00204907-vocoder-demonstration-using-a-speex-audio-codec-on-stm32f101xx-and-stm32f103xx-microcontrollers-stmicroelectronics.pdf
Vocoder demonstration using a Speex audio codec on STM32F101xx and STM32F103xx microcontrollers Introduction This application note describes how to implement the codec Speex software on the STM32F101xx and STM32F103xx microcontrollers to build a vocoder application. Speex is a free audio codec dedicated to speech encoding and decoding.
iphone - iOS Audio Unit + Speex encoding is distorted ...
https://stackoverflow.com/questions/11499957/ios-audio-unit-speex-encoding-is-distorted
I am working on an iOS project that needs to encode and decode Speex audio using a remoteIO audio unit as input / output. The problem I am having is although speex doesn't print any errors, the audio I get is somewhat recognizable as voice but very distorted, sort of sounds like the gain was just cranked up in a robotic way.
Encoding Speex with libavcodec (FFMpeg)? - Stack …
https://stackoverflow.com/questions/9716130/encoding-speex-with-libavcodec-ffmpeg
Try encoding the same data into Speex using the ffmpeg command line utility and see if the resulting file plays. I'm looking at some info at www.speex.org and it seems that speex data is put into .ogg files. The player you are using might not recognize raw Speex data, but only if it is wrapped in .ogg.
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