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:
Jan. 04, 1994
Filed:
Mar. 19, 1991
Hideyo Uwabata, Osaka, JP;
Yoshio Yasumoto, Nara, JP;
Sadashi Kageyama, Hirakata, JP;
Shuji Inoue, Moriguchi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A multiplex TV signal processing apparatus in a television signal transmitting and receiving system includes an apparatus at the transmitting side which has a first amplitude-modulator for modulating a first carrier by a main signal to obtain a vestigial side-band amplitude-modulated main signal; a second amplitude-modulator for modulating a second carrier but whose frequency is the same as which phase is 90 degree different from the first carrier by a sub signal to obtain a carrier suppressed amplitude-modulated signal; a first inserter for inserting a first ghost canceling reference signal into a horizontal line of the main signal during a vertical blanking period; a second inserter for inserting a second ghost canceling reference signal into the same horizontal line of the sub signal as the first ghost canceling reference signal; and includes an apparatus at the receiving side which has: a first demodulator for demodulating the main signal; a second demodulator for demodulating the sub signal; a ghost canceler for canceling a ghost of the sub signal using the second ghost canceling reference signal; and a crosstalk canceler for canceling the crosstalk of the sub signal from the main signal using the first ghost canceling reference signal.