An adaptive delta modulator with noise spectral shaping. - Maurizio Copperi; Neviano Dal Degan; J. Roberto B. de Marca (ICASSP, 1981)

Broadcasting-quality transmission of audio signals at 64 kbps. - Luciano Bertorello; Maurizio Copperi; Giancarlo Pirani; Fulvio Rusina (ICASSP, 1982)

A variable rate embedded-code speech waveform coder. - Maurizio Copperi (ICASSP, 1982)

Design of a 4.8/9.6 kbps baseband LPC coder using split-band and vector quantization. - Luciano Bertorello; Maurizio Copperi (ICASSP, 1983)

9.6 kbit/s Piecewise LPC residual excited coder using multiple-stage vector quantization. - Maurizio Copperi; Daniele Sereno (ICASSP, 1984)

Vector quantization and perceptual criteria for low-rate coding of speech. - Maurizio Copperi; Daniele Sereno (ICASSP, 1985)

CELP Coding for high-quality speech at 8 kbit/s. - Maurizio Copperi; Daniele Sereno (ICASSP, 1986)

16 kbit/s Split-band APC coder using vector quantization and dynamic bit allocation. - Maurizio Copperi; Daniele Sereno; Luciano Bertorello (ICASSP, 1986)

Feature extraction and product codes in vector excited coders. - Maurizio Copperi; Daniele Sereno (ICASSP, 1987)

Rule-based speech analysis and application to CELP coding. - Maurizio Copperi (ICASSP, 1988)

Efficient excitation modeling in a low bit-rate CELP coder. - Maurizio Copperi (ICASSP, 1991)

A low bit-rate CELP coder based on multi-path search methods. - Maurizio Copperi (ICSLP, 1992)

On encoding pitch and LPC parameters for low-rate speech coders. - Maurizio Copperi (Eur. Trans. Telecommun., 1994)

Guest editorial. - José Roberto Boisson de Marca; Maurizio Copperi (Eur. Trans. Telecommun., 1994)