The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1999
Filed:
Nov. 18, 1996
Applicant:
Inventor:
Yasuyuki Chaki, Chiba, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04L / ;
U.S. Cl.
CPC ...
375281 ; 375308 ; 375326 ; 375332 ; 359181 ; 359158 ;
Abstract
The transmitter QPSK-modulates the audio data, generates a transmission channel clock having a frequency 5/4 times the data clock based on the audio data, and outputs the modulated signal resulted from QPSK-modulation at the timing of the transmission channel clock. The infrared emitter emits infrared-rays based on the modulated signal. Digital data is thus efficiently transmitted by way of infrared-rays with suppressed complexity of data processing for modulation and demodulation.