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Patent Searching and Data


Title:
SIGNAL TRANSMITTING SYSTEM AND SIGNAL TRANSMITTING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/020341
Kind Code:
A1
Abstract:
Provided is a signal transmitting system for transmitting an analog signal obtained by superimposing a charging signal on a voice signal from a sending device to a receiving device, wherein the sending device comprises a separation unit that separates the voice signal from the analog signal, an A/D conversion unit that A/D converts the voice signal separated by the separation unit, a detection unit that detects the charging signal from the analog signal, a coding unit that codes the charging signal detected by the detection unit, and a sending unit that sends the voice signal A/D converted by the A/D conversion unit and the charging signal coded by the coding unit to the receiving device, and the receiving device comprises a receiving unit that receives the voice signal and charging signal sent by the sending unit, a D/A conversion unit that D/A converts the voice signal received by the receiving unit, a decoding unit that decodes the charging signal received by the receiving unit, a conversion unit that converts the charging signal decoded by the decoding unit into an analog wave, and a synthesis unit that synthesizes the voice signal D/A converted by the D/A conversion unit and the analog wave.

Inventors:
FURUYA HIROYUKI (JP)
TOKUYASU TOMOHIRO (JP)
FUKUZONO HAYATO (JP)
ONO YU (JP)
TATSUTA TSUTOMU (JP)
NAKAYAMA TOMOHIRO (JP)
Application Number:
PCT/JP2020/028690
Publication Date:
February 04, 2021
Filing Date:
July 27, 2020
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04M15/00; H04M17/00; H04W4/24; H04W84/14
Foreign References:
JP2000278452A2000-10-06
JP2001016624A2001-01-19
JPS6148268A1986-03-08
US20070081645A12007-04-12
Attorney, Agent or Firm:
TAKADA, TAKAHASHI & PARTNERS (JP)
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