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Continuously Variable Slope Delta (CVSD) audio encoder ...
https://liquidsdr.org/doc/cvsd/#:~:text=Continuously%20variable%20slope%20delta%20%28CVSD%29%20source%20encoding%20is,It%20is%20a%20form%20of%20delta%20modulation%20where
CVSD Compressed Audio | The DevSter Forums
https://devster.proboards.com/thread/473/cvsd-compressed-audio
Here's the results of my experiments in CVSD (Continuously Variable Slope Delta compression). The first archive compresses a signed 16 bit mono 22050 Hz sample to a 1 bit CVSD 22050 Hz stream (16:1 compression). It only plays back the MSB of the decompressed sample, so the effective compression is 8:1.
CVSD codec – ntCVSD – Noesis Technologies
http://noesis-tech.com/specification/cvsd-codec-ntcvsd/
CVSD compression and decompression algorithm. The core can be configured either as a CVSD encoder or as a CVSD decoder. Support for 16-bit PCM speech input (sampled at 8 KHz) or audio input (sampled at 16 KHz). Higher sampling rates can also be supported. Innovative fully digital CVSD algorithm implementation, no requirement for analog parts.
CVSD Compressed Audio | SegaXtreme
https://segaxtreme.net/threads/cvsd-compressed-audio.16533/
In case folks don't check out SpritesMind, I've been working on CVSD compression. I just posted an example of using the Z80 to decompress the audio. Comes with source. musicdemo-1.7z A slight overview: CVSD takes 16 bit samples at one frequency, then compresses them down to 1 bit per sample at...
Continuously variable slope delta modulation - Wikipedia
https://en.wikipedia.org/wiki/Continuously_variable_slope_delta_modulation
Continuously variable slope delta modulation (CVSD or CVSDM) is a voice coding method. It is a delta modulation with variable step size (i.e., special case of adaptive delta modulation), first proposed by Greefkes and Riemens in 1970.. CVSD encodes at 1 bit per sample, so that audio sampled at 16 kHz is encoded at 16 kbit/s.
CVSD Codec | Continuously Variable Slope Delta Modulation
https://www.vocal.com/speech-coders/cvsd/
Continuously Variable Slope Delta modulation, or CVSD, is a codec which was designed for use in military wireless communication systems. This codec supports various bitrates, depending on the sampling rate. For example, CVSD which encode a bit per sample, will encode an 8kHz 16-bit linear sample stream to a 8kbps data stream.
Continuously variable slope delta modulation
https://hyperleap.com/topic/Continuously_variable_slope_delta_modulation
VINSON is a family of voice encryption devices used by U.S. and allied military and law enforcement, based on the NSA's classified Suite A SAVILLE encryption algorithm and 16 kbit/s CVSD audio compression.
CVSD Encoding and Decoding | PDF | Codec | Sound ...
https://www.scribd.com/presentation/327319757/CVSD-Encoding-and-Decoding
Continuously Variable Slope. Delta (CVSD) Modulation Group. members SHAHADAT ALI SHAHEER KHALID AAMIR SULTAN MUHAMMAD IMRAN AHTESHAM. CVSD - Definition A voice. compression technique that encodes the changes (i.e., deltas) in the slope (i.e., rate of change), rather than the amplitude, of analog voice signals A method by which a voice signal is digitized …
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