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Patent Searching and Data


Title:
DEVICE FOR CORRECTING DEFECTIVE SIGNAL
Document Type and Number:
Japanese Patent JP2004129144
Kind Code:
A
Abstract:

To attain both an SN improvement effect of a CCD and defective signal correction unaffected by the expansion of the defective signal by a lowpass filter.

A defect signal correction device comprises: a lowpass filter 3 for restricting the frequency band of an output signal of a DDS circuit 2 below a prescribed band; an AD converter 4 for converting a signal outputted from the lowpass filter 3 into a digital signal; an AD converter 6 for converting an output signal of the DDS circuit 2 into a digital signal; a defect correction data generating circuit 7 for generating correction data corresponding to a defective pixel on the basis of a signal outputted from the AD converter 6; and a switching circuit 8 for switching and outputting outputs of the AD converter 4, the AD converter 6 and the defect correction data generating circuit 7. The switching circuit 8 is controlled so as to respectively switch a signal corresponding to the defective pixel among the output signals of the AD converter 4 and a signal corresponding to pixels located around the defective pixel to signals outputted from the defect correction data generating circuit 7 and the AD converter 6.


Inventors:
YASUI TOSHIYUKI
Application Number:
JP2002000293847
Publication Date:
April 22, 2004
Filing Date:
October 07, 2002
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04N5/14; H04N5/335; H04N5/367; H04N5/369; H04N5/372; H04N5/378; (IPC1-7): H04N5/335; H04N5/14
Attorney, Agent or Firm:
Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito