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dsPIC DSC Speex Speech Encoding/Decoding Library
https://www.microchip.com/SWLibraryWeb/product.aspx?product=Speex%20Speech%20EncodingDecoding
The dsPIC ® DSC Speex Speech Encoding/Decoding Library performs toll-quality voice compression and voice decompression. The library is a modified version of the Speex speech coder and is optimized specifically for the dsPIC DSC family of Digital Signal Controllers (DSCs). It uses Code Excited Linear Prediction (CELP), which is a popular coding ...
dsPIC® DSC Speech and Audio Fast Forward (SAFF) Tool ...
https://www.microchip.com/en-us/software-library/speech-and-audio-fast-forward
The dsPIC® DSC Speech and Audio Fast Forward (SAFF) tool provides users with real-time control of Microchip’s Speech and Audio Processing Algorithms as they are running in an embedded system application. This PC GUI tool facilitates easy tuning of Microchip’s Noise Suppression, Acoustic Echo Cancellation, Line Echo Cancellation and ...
dsPic audio player ? | Microchip
https://www.microchip.com/forums/m166133.aspx
0. Microchip has a sound recording/playback lib for the dsPIC. I believe it is designed for voice only. It uses a type of compression that can be done on the fly by the controller, however, it still takes I think something like 1 k/sec. So you would need an external chip to store audio of the length you want (not a really big problem).
Microchip Brings Two More Low Pin Count dsPIC30F 16-bit ...
https://ww1.microchip.com/downloads/en/Market_Communication/June%20microSolutions.pdf
dsPIC® Digital Signal Controller • The speech encoder samples data at 8 kHz, using either the dsPIC DSC’s on-chip 12-bit Analog-to-Digital converter or a 16-bit input obtained from an external codec, via the on-chip codec interface port. The encoder achieves up to a 16:1 compression ratio and generates a fixed 8 kbps output rate.
Microchip Technology Announces Royalty-Free dsPIC30F ...
https://www.businesswire.com/news/home/20050531005213/en/Microchip-Technology-Announces-Royalty-Free-dsPIC30F-Library-for-Speech-Compression-and-Decompression
"By adapting the open-source Speex audio compression format, we are providing dsPIC DSC users with low-cost, high-quality compression capability from the open source free software community," said ...
Playback | Microchip Technology
https://www.microchip.com/en-us/solutions/consumer/audio-and-speech/playback
The graph below compares a variety of compression schemes in use today. We provide software libraries to support algorithms that require no payment of royalties, such as IMA ADPCM for 8- and 16-bit PIC ® MCUs, G.711, Speex and G.726A for PIC24 MCUs and dsPIC ® DSCs, and G.711, Speex and ADPCM for PIC32 MCUs.
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