EP0465194A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ghost cancelling receiver using ghost cancel reference signal
Assignee: Sony Corp
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Filing: 1991-07-01
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Granted: —
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Expires: 2011-07-01
Abstract
Abstract A ghost cancelling receiver using ghost cancel reference signal arranged such that a ghost wave component is adaptively separated from a received video signal on the basis of the level of a noise component thereby to properly cancel the ghost.
Inventors
- 👤 Satoshi c/o Sony Corporation Kobayashi
- 👤 Junya C/O Sony Corporation Saito
- 👤 Tsutomu c/o Sony Corporation Kume
- 👤 Takatomo Sony Corporation Nagamine
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 09:17
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/21; H04N5/211
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A ghost cancelling receiver using a ghost cancel reference signal comprising: a transversal filter to be supplied with a receiving video signal; a gate circuit connected to the output of said transversal filter for gating a ghost cancel reference (GCR) signal; and a calculating circuit connected to the output of said gate circuit for deriving a distortion component from said gated GCR signal.
Claim 2
Dependent Claim
80 words
A ghost cancelling receiver as claimed in claim 1, further comprising: a maximum value detection circuit connected to the output of said calculating circuit; a comparator for comparing the output of said maximum value detection circuit and a signal which has not gone through said maximum value detection circuit; and a feedback loop starting from the output of said comparator to a control terminal of said transversal filter for controlling a characteristic of the pass band of said transversal filter.
Claim 3
Dependent Claim
35 words
A ghost cancelling receiver as claimed in claim 1 or 2, further comprising: a GCR signal generator; subtracting means for subtracting the output of said GCR signal generator from the output of said calculating circuit.
Claim 4
Dependent Claim
35 words
A ghost cancelling receiver as claimed in claim 3, further comprising: a differentiating circuit connected to the output of said subtracting means; and absolute value detecting means connected to the output of said differentiating circuit.
Claim 5
Dependent Claim
56 words
A ghost cancelling receiver as claimed in claim 4, further comprising: feedback switching means connected to the output of said differentiating circuit and controlled by the output signal of said comparator; and converting means connected to the output signal of said feedback switching means for converting this signal into a control signal of said transversal filter.
Claim 6
Dependent Claim
33 words
A ghost cancelling receiver according to any one of claims 1 to 5, further comprising: an output switch connected to the output of said transversal filter;and microcomputer means for controlling said output switch.
Claim 7
Dependent Claim
50 words
A ghost cancelling receiver according to any one of claims 1 to 6, wherein said transversal filter comprising a first unit which comprises a transversal filter and an adder connected as a feedfoward loop, a second unit which comprises a transversal filter and an adder connected as a feedback loop.
References Cited (Backward Citations)
No citation records indexed.
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