发明名称 |
INTERFLUENT NOISE REDUCTION DEVICE |
摘要 |
<P>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. <P>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. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
申请公布号 |
JP2004186864(A) |
申请公布日期 |
2004.07.02 |
申请号 |
JP20020349696 |
申请日期 |
2002.12.02 |
申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
TATSUTA AKIHIRO;SHIOMI TOMONORI |
分类号 |
H04B3/38;H04N7/173;H04N21/61;H04N21/647 |
主分类号 |
H04B3/38 |
代理机构 |
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代理人 |
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地址 |
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