Title:
BROADCASTING DEVICE USING OFDM MODULATION METHOD
Document Type and Number:
Japanese Patent JP2002164866
Kind Code:
A
Abstract:
To provide a broadcasting device using an orthogonal frequency division multiplexing(OFDM) modulation modulation method which can expand a region, where television broadcasting can be received, further from the existing region.
A modulation level of a video carrier is adjusted by a modulation level setting circuit 5 and a modulation level of an audio carrier is adjusted by a modulation level setting circuit 10 so that the range where video signals can be received is the same as the range where audio signals can be received. Then, both of video and audio modulated signals are amplified and transmitted by a transmitter 23.
Inventors:
WATANABE SHINJI
Application Number:
JP2000362049A
Publication Date:
June 07, 2002
Filing Date:
November 29, 2000
Export Citation:
Assignee:
NEC CORP
International Classes:
H04N5/40; H04H20/00; H04H20/28; H04H20/46; H04H20/67; H04J11/00; H04L1/00; H04Q11/02; H04H3/00; (IPC1-7): H04J11/00; H04H1/00; H04N5/40
Attorney, Agent or Firm:
Yanagi Kawa Shin