Title:
【発明の名称】重畳を解除された映像信号からの重畳搬送波と側波帯の除去状態を改善する装置
Document Type and Number:
Japanese Patent JP2553244
Kind Code:
B2
Abstract:
Apparatus is disclosed for processing video information which is reproduced from a magnetic recording medium in a video cassette recorder. The luminance portion of the video signal, which is "folded" about a sampling frequency carrier before recording on magnetic tape, is unfolded after being read from the magnetic tape to restore the bandwidth of the signal, and is applied in parallel through horizontal and vertical comb filters. The combined output of the horizontal comb filter and the vertical comb filter may include incompletely cancelled horizontal and vertical components of the folding frequency and sidebands due to the effects of picture contents. An edge detector receptive to the unfolded video signal responds to an encountered brightness edge, and generates a signal which varies the proportions of the video outputs of the horizontal and vertical comb filters in the combined output.
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Inventors:
KURISUTOFUAA EICHI SUTOROORU
JUNNWAN KOO
REIMONDO EI SHUNITSUTSURAA
JUNNWAN KOO
REIMONDO EI SHUNITSUTSURAA
Application Number:
JP33342990A
Publication Date:
November 13, 1996
Filing Date:
November 29, 1990
Export Citation:
Assignee:
SANSEI ELECTRONICS CORP
International Classes:
H04N5/208; H04N5/14; H04N5/91; H04N5/93; H04N7/12; H04N9/79; H04N9/797; H04N11/02; (IPC1-7): H04N5/93; H04N5/208
Domestic Patent References:
| JP6320984A | ||||
| JP2219393A |
Attorney, Agent or Firm:
Tadahiko Ito (2 outside)