A GSM Vocoder using a flexible DSP core

Author

Cand, M. ; Conq, B. ; Soler, M. ; Bocaert, B. ; Kuntz, A.

Author_Institution

CNET, Meylan, France

fYear

1992

fDate

21-23 Sept. 1992

Firstpage

225

Lastpage

228

Abstract

We present a speech vocoder that will be used in GSM mobile systems to convert 300-3400 Hz speech to 13 Kbit/s digital bit stream. This 350 000 transistor chip was designed in a CMOS 1.0 μm technology in collaboration with VLSI Technology. The architecture was defined with a flexible 13 MHz DSP core developed at CNET. The GSM 06 series recommendations are met with a low 2.7 Mips. The DSP core has a VLIW microprogrammed Harvard architecture. The ROM program is obtained without writing assembler using a C-to-microcode compiler targeted to the architecture.

Keywords

CMOS integrated circuits; VLSI; cellular radio; electronic engineering computing; program compilers; read-only storage; vocoders; C-to-microcode compiler; CMOS technology; CNET; GSM 06 series recommendations; GSM mobile systems; GSM vocoder; ROM program; VLIW microprogrammed Harvard architecture; VLSI technology; flexible DSP core; frequency 13 MHz; frequency 300 Hz to 3400 Hz; size 1.0 mum; transistor chip; CMOS technology; Collaboration; Digital signal processing; Digital signal processing chips; GSM; Read only memory; Speech; VLIW; Very large scale integration; Vocoders;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1992. ESSCIRC '92. Eighteenth European

Conference_Location

Copenhagen

Print_ISBN

87-984232-0-7

Type

conf

DOI

10.1109/ESSCIRC.1992.5468230

Filename

5468230