The past decade has witnessed substantial progress towards the application of low-rate
speech coders to civilian and military communications as well as computer-related voice …

Speech coding is a highly mature branch of signal processing deployed in products such as
cellular phones, communication devices, and more recently, voice over internet protocol …

An adaptive postfiltering algorithm for enhancing the perceptual quality of coded speech is
presented. The postfilter consists of a long-term postfilter section in cascade with a short …

Speech and audio compression has advanced rapidly in recent years spurred on by cost-
effective digital technology and diverse commercial applications. Recent activity in speech …

The vector sum excited linear prediction speech coder is presented. It utilizes a codebook
with a structure that allows for a very efficient search procedure. Other advantages of the …

A Practical Handbook of Speech Coders offers in-depth treatment of the basics of speech
coding plus the innovations to the basic methods that make the coders useful and efficient. It …

Voiced speech is interpreted as a concentration of slowly evolving pitch-cycle waveforms.
This signal can be reconstructed by interpolation from a downsampled sequence of pitch …

Special fast procedures for the code excited linear predictive coding (CELP) algorithm have
been developed to make implementation on modest hardware possible. The advantages, as …

The authors describe a code-excited linear predictive (CELP) coder that was recently
selected as the US government standard 4800-b/s voice coder. The coder has the capability …

In differential PCM, each sample s (n) is compared to a prediction sp (n), and the difference
is called the prediction residual d (n). d (n) has a smaller dynamic range than s (n), so for a …