Title :
TDD-filtering and demodulation in acoustically coupled modem
Author :
Klier, E. ; Hrubý, J. ; Okluský, M.
Author_Institution :
Czechoslovak Acad. of Sci., Prague, Czechoslovakia
Abstract :
The Czechoslovak Association of the Handicapped asked the authors to help deaf people by designing an economical TDD (Telephone Device for the Deaf). Among Czechoslovak deaf the SINCLAIR ZX SPECTRUM (with the Z 80 microprocessor) is widely used. Therefore the authors have decided to implement TDD as a peripheral device to this microcomputer. There exists a great variety of possible solutions with different weight given to software and hardware parts
Keywords :
handicapped aids; modems; SINCLAIR ZX SPECTRUM; TDD; Telephone Device for the Deaf; acoustically coupled modem; deaf people; demodulation; filtering; peripheral device;
Conference_Titel :
Circuit Theory and Design, 1989., European Conference on
Conference_Location :
Brighton
