Patent
1993-12-21
1997-06-24
MacDonald, Allen R.
G10L 302
Patent
active
056424639
ABSTRACT:
A stereophonic voice recording and playback device for stereophonically recording and reproducing voice signals, includes: an adding circuit for receiving a first channel analog voice signal and a second channel analog voice signal, performing orthogonal conversion of the respective analog voice signals, and adding the orthogonally converted signals; an Analog-to-Digital (A/D) converter for receiving the added signal from the adding circuit and converting the added signal to a digital signal; a compressing circuit for receiving the digital signal from the A/D converter and compressing the digital signal; a memory circuit for storing the compressed digital signal; and an expanding circuit for reading out the digital signal from the memory circuit and reproducing a stereophonic signal.
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patent: 5184219 (1993-02-01), Cho
patent: 5291525 (1994-03-01), Funderburk et al.
patent: 5392348 (1995-02-01), Park et al.
Murata Yasumoto
Nakano Takahiko
MacDonald Allen R.
Onka Thomas J.
Sharp Kabushiki Kaisha
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