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Title:
BROADCAST WAVE SYNCHRONIZATION SIGNAL CONVERTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/179066
Kind Code:
A1
Abstract:
[Problem] To provide a broadcast wave synchronization signal converting device that synchronizes broadcast waves with GNSS signals on a reception side and corrects the broadcast waves to global standard times by use of correction values, thereby performing periodic calibrations of frequencies. [Solution] A broadcast wave synchronization signal converting device wherein: a PLL circuit 10 reproduces system clocks on the basis of time information acquired from received broadcast waves; a subtractor (C1) 17 subtracts, from a counter value corresponding to the periodic signal intervals of GNSS signals, a counter value of the system clocks counted at the signal intervals and outputs the difference value; a control amount adjustor 16 calculates a control amount of synchronization as a correction value on the basis of the difference value; and a subtractor (B) 15 subtracts the correction value from the acquired time information and sets the corrected time information to a PCR counter 14 as the internal time information thereof.

Inventors:
YANAGISAWA KOICHI (JP)
YASUI SATORU (JP)
Application Number:
PCT/JP2017/012442
Publication Date:
October 04, 2018
Filing Date:
March 27, 2017
Export Citation:
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Assignee:
HITACHI INT ELECTRIC INC (JP)
International Classes:
H04L7/00; H04L7/033; H04L7/04
Domestic Patent References:
WO2016194518A12016-12-08
Foreign References:
JP2009033326A2009-02-12
JP2012099960A2012-05-24
JP2006345223A2006-12-21
Attorney, Agent or Firm:
FUNATSU, Nobuhiro (JP)
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