Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Reexamination Certificate
2005-11-22
2005-11-22
Pendleton, Brian T. (Department: 2644)
Electrical audio signal processing systems and devices
Binaural and stereophonic
Broadcast or multiplex stereo
C381S014000, C398S140000
Reexamination Certificate
active
06968062
ABSTRACT:
This invention is directed to a transmitting apparatus adapted for carrying out transmission of audio signals by using infrared rays and a reproducing apparatus using a headphone device adapted to receive audio signals transmitted from the transmitting apparatus to reproduce them. The transmitting apparatus allows digital audio signal to undergo time axis compression every unit time period, and to repeat the same contents to transmit such repetitive signals by infrared rays. The headphone device comprises a light receiving element for receiving infrared rays, and a memory adapted so that valid signals of the received repetitive signals are written thereinto and the written signals are caused to undergo time axis expansion and are read out therefrom to allow the signals which have been read out from the memory to undergo D/A conversion to deliver the signals thus obtained to speaker units of the headphone device to reproduce them.
REFERENCES:
patent: 5406634 (1995-04-01), Anderson et al.
patent: 5483367 (1996-01-01), Han
patent: 5602669 (1997-02-01), Chaki
patent: 6021205 (2000-02-01), Yamada et al.
patent: 6553121 (2003-04-01), Matsuo et al.
Translation of JP05260024A Oct. 1993 Japan, Ono, Takashi.
Maioli Jay H.
Pendleton Brian T.
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