Among the facsimiles that use the telephone network, the service provided by NTT is called telephone fax. There are three types of facsimiles that use subscriber telephone lines: G1 (6-minute machine), G2 (3-minute machine), and G3 (1-minute machine). The Telephone Fax 2000 used in the G2 model employs flat transmission scanning with an image sensor that uses a charge-coupled device and reception scanning with a thermal head, and transmits data using the amplitude-phase modulation residual sideband method. The Telephone Fax 3000 and 3300 used in the G3 model also use a similar image sensor, the former using thermal recording and the latter using electrostatic recording. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
電話網利用ファクシミリのうち,NTTで実施しているサービスを電話ファックスという。加入電話回線を用いるファクシミリには,G1形(6分機),G2形(3分機),G3形(1分機)の3種類がある。G2形に用いられている電話ファックス2000は電荷結合デバイスを使用したイメージセンサーによる平面送信走査,感熱ヘッドによる受信走査を採用し,振幅位相変調残留側波帯方式により電送する。G3形に用いられている電話ファックス3000および3300も同様のイメージセンサーを用いており,前者は感熱記録,後者は静電記録方式を採用している。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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