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. 06, 2005
Filed:
Feb. 25, 2000
Yasunari Ikeda, Kanagawa, JP;
Toshihisa Hyakudai, Chiba, JP;
Takahiro Okada, Saitama, JP;
Tamotsu Ikeda, Tokyo, JP;
Toru Kuroda, Tokyo, JP;
Naohiko Iai, Tokyo, JP;
Kenichi Tsuchida, Tokyo, JP;
Makoto Sasaki, Tokyo, JP;
Yasunari Ikeda, Kanagawa, JP;
Toshihisa Hyakudai, Chiba, JP;
Takahiro Okada, Saitama, JP;
Tamotsu Ikeda, Tokyo, JP;
Toru Kuroda, Tokyo, JP;
Naohiko Iai, Tokyo, JP;
Kenichi Tsuchida, Tokyo, JP;
Makoto Sasaki, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Abstract
A frequency interleaving circuit frequency-interleaves main signals generated according to sound data by parameters set according to frequencies of transmission channels. A sub-signal generating circuit generates sub-signals for transmission control including pilot signals. Mapping circuits modulate the sub-signals by using pseudo-random sequences generated based on initial values of random codes set according to frequencies of transmission channels. The frequency-interleaved main signals and the sub-signals modulated by the mapping circuits are OFDM-modulated. Then, they are converted to the frequencies of the transmission channels. An increase of a dynamic range of transmission signals can be suppressed by controlling the initial values of random codes set.