Speech coders are of threetwo types:<ref>{{cite web |url = http://users.ece.gatech.edu/~juang/8873/Bae-LPC10.ppt |title = Soo Hyun Bae, ECE 8873 Data Compression & Modeling, Georgia Institute of Technology , 2004 |archive-url=https://web.archive.org/web/20060907225836/http://users.ece.gatech.edu/~juang/8873/Bae-LPC10.ppt |archive-date=7 September 2006 |url-status=dead}}</ref>
# Waveform coders
#* Time-___domain: [[PCM]], [[ADPCM]]
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#* [[Linear predictive coding]] (LPC)
#* [[Formant synthesis|Formant coding]]
#* [[Machine learning]], related toincluding [[deep learning speechDeep_learning_speech_synthesis#Neural_vocoder|neural synthesisvocoder]]<ref>{{cite journal |last1=Zeghidour |first1=Neil |last2=Luebs |first2=Alejandro |last3=Omran |first3=Ahmed |last4=Skoglund |first4=Jan |last5=Tagliasacchi |first5=Marco |title=SoundStream: An End-to-End Neural Audio Codec |journal=IEEE/ACM Transactions on Audio, Speech, and Language Processing |date=2022 |volume=30 |pages=495–507 |doi=10.1109/TASLP.2021.3129994|arxiv=2107.03312}}</ref>
== Sample companding viewed as a form of speech coding ==
