INTERFLUENT NOISE REDUCTION DEVICE

PROBLEM TO BE SOLVED: To provide an up interfluent noise reducing device that is easily introduced and is inexpensive in a bidirectional CATV system complying with a DOCSIS specification that is a standard of measure. SOLUTION: Down signals are demodulated which are transmitted from a central modem...

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Bibliographische Detailangaben
Hauptverfasser:	TATSUTA AKIHIRO, SHIOMI TOMONORI
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION TRANSMISSION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an up interfluent noise reducing device that is easily introduced and is inexpensive in a bidirectional CATV system complying with a DOCSIS specification that is a standard of measure. SOLUTION: Down signals are demodulated which are transmitted from a central modem installed in a cable TV station to a cable modem. Information are analyzed which concerns up signals transmitted from the cable modem to the central modem, so that based on the information, the up signals are subjected to a frequency band limiting, thus reducing the interfluent noises. COPYRIGHT: (C)2004,JPO&NCIPI