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US 2002/0058487 A1Published application
Same channel frequency interference reducing circuit and television broadcasting receiver
OwnerIsao Takeuchiinventor
Life of this patent
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Abstract
A radio wave that will act as an interference wave is received together with a desired wave. A phase locking section produces a phase-locked signal that is phase-locked at the frequency of the interference wave. A level adjusting section adjusts the level of the phase-locked signal and supplies the level-adjusted, phase-locked signal to a subtracter, whereby the interference wave component is eliminated from the desired wave. The desired wave from which the interference wave component is eliminated is fed back to the level adjusting section.
Claims8
An interference reducing circuit comprising:
- phase locking means for attaining phase locking to an interference wave having a carrier frequency that is received together with a reception wave by tuning;
- level adjusting means for adjusting a level of a phase-locked signal that is output from the phase locking means;
- and
- subtracting means for subtracting the level-adjusted, phase-locked signal from the reception wave.
1 more element
A TV receiver comprising:
- receiving means for receiving a transmitted broadcast including video or audio information;
- an A/D converter for converting, into digital information, a video or audio signal received by the receiving means;
- a signal processing circuit for demodulating the digital information of the video or audio information that is output from the A/D converter;
- phase locking means for attaining phase locking to interference wave information that is mixed in the digital information that is output from the A/D converter;
- level adjusting means for adjusting a level of the interference wave information to which phase locking is attained by the phase locking means;
- and
- subtracting means for subtracting the level of the interference wave information obtained by the level adjusting means from the video or audio information.
4 more elements
Dependencies are inferred from the claim text.