US4754322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
YC-signal separation circuit responsive to magnitude of vertical correlation
Assignee: Hitachi Ltd
•
Filing: 1986-09-17
•
Granted: 1988-06-28
•
Expires: 2006-09-17
Abstract
Abstract The present invention is for separating luminance signal Y and color difference signal C from the composite color television signal and includes a frame memory for storing the composite color television signal, a motion detector for detecting motion of a picture image on the basis of the signal read out from the frame memory, a correlation detector for detecting the magnitude of vertical correlation of pictures on the basis of the signal read out from the frame memory, a vertical-axis filter for performing YC-signal separation through a filtering operation in the vertical-axis direction, a time-axis filter for performing a filtering operation in the time-axis direction, a two-dimensional filter for performing YC-signal separation through a filtering operation in both the horizontal and vertical directions, and a mixer for mixing the outputs of the three filters in accordance with the magnitude of motion and the magnitude of vertical correlation.
Inventors
- 👤 Akihide Okuda
- 👤 Isao Nakagawa
- 👤 Masato Sugiyama
- 👤 Kenji Katsumata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N5/00; H04N5/14; H04N5/144; H04N9/77; H04N9/78
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
137 words
A signal processing circuit in which a composite color television signal containing luminance signal (Y) and color difference signals (C) multiplexed in frequency is subjected to YC-signal separation, comprising: a frame memory for storing said composite color televison signal; vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures by obtaining |X 1 -X -1 |, |X 1 -X 0 | and |X -1 -X 0 | on the basis of the three sequential scanning lines X -1 , X 0 and X 1 read out from said frame memory; a vertical-axis filter for performing the YC-signal separation through a filtering operation in the vertical direction; and an attenuator for attenuating the color difference signals having an attenuation factor varying in accordance with the magnitude of correlation determined by said vertical correlation detecting means.
Claim 2
Dependent Claim
137 words
A signal processing circuit in which a composite color television signal containing luminance signal (Y) and color difference signals (C) multiplexed in frequency is subjected to YC-signal separation, comprising: a frame memory for storing said composite color televison signal; vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures by obtaining |X 1 -X -1 |, |X 1 -X 0 | and |X -1 -X 0 | on the basis of the three sequential scanning lines X -1 , X 0 and X 1 read out from said frame memory; a vertical-axis filter for performing the YC-signal separation through a filtering operation in the vertical direction; and an attenuator for attenuating the color difference signals having an attenuation factor varying in accordance with the magnitude of correlation determined by said vertical correlation detecting means.
Claim 3
Dependent Claim
55 words
A signal processing circuit for a composite color television signal according to claim 1, further comprising motion detecting means for detecting motion of a picture in response to the signal read out of said frame memory; and mixing means for mixing two input signals in accordance with the magnitude of the motion of said picture.
Claim 4
Dependent Claim
57 words
A signal processing circuit for a composite color television signal according to claim 1, further comprising motion detecting means for detecting the motion of a picture; a time-axis filter for performing YC-signal separation through filtering processing in the time-axis direction; and mixing means for mixing two input signals thereto in accordance with the motion of said picture.
Claim 5
Dependent Claim
129 words
A signal processing circuit in which a composite color television signal containing luminance signal (Y) and color difference signals (C) multiplexed in frequency is subjected to YC-signal sepration, comprising: a frame memory for storing said composite color television signal; vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures on the basis of the signal read out from said frame memory; vertical-axis filter for performing YC-signal separation through a filtering operation in the vertical direction and having at least one output; a two-dimensional filter for performing YC-signal separation through a two-dimensional filtering processing in both horizontal and vertical directions and having at least one output; and mixing means for mixing the output signals of said two filters in accordance with the magnitude of the vertical correlation.
Claim 6
Dependent Claim
129 words
A signal processing circuit in which a composite color television signal containing luminance signal (Y) and color difference signals (C) multiplexed in frequency is subjected to YC-signal sepration, comprising: a frame memory for storing said composite color television signal; vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures on the basis of the signal read out from said frame memory; vertical-axis filter for performing YC-signal separation through a filtering operation in the vertical direction and having at least one output; a two-dimensional filter for performing YC-signal separation through a two-dimensional filtering processing in both horizontal and vertical directions and having at least one output; and mixing means for mixing the output signals of said two filters in accordance with the magnitude of the vertical correlation.
Claim 7
Dependent Claim
86 words
A signal processing circuit for a composite color television signal according to claim 4, further comprising motion detecting means for detecting the magnitude of motion of a picture in response to the signal read out from said frame memory; a time-axis filter for performing YC-signal separation through a filtering operation in the time-axis direction and having at least one output; and mixing means for mixing the signals at the outputs of said three filters in accordance with the magnitudes of said picture motion and vertical correlation.
Claim 8
Dependent Claim
201 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separating means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures by obtaining |X 1 -X -1 |, |X 1 -X 0 | and |X -1 -X 0 | on the basis of the three sequential scanning lines X -1 , X 0 and X 1 read out from said frame memory; a vertical-axis filter for performing the YC-signal sepration through a filtering operation in the vertical direction; and an attenuator for attenuating the color difference signals having an attenuation factor varying in accordance with the magnitude of correlation determined by said vertical correlation detecting means; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and vertical axes; motion detecting means for detecting the magnitude of motion of a picture in response to the signal read out from said frame memory; an attenuator having a gain which is controlled by the magnitude of said motion; and an adder.
Claim 9
Dependent Claim
201 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separating means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures by obtaining |X 1 -X -1 |, |X 1 -X 0 | and |X -1 -X 0 | on the basis of the three sequential scanning lines X -1 , X 0 and X 1 read out from said frame memory; a vertical-axis filter for performing the YC-signal sepration through a filtering operation in the vertical direction; and an attenuator for attenuating the color difference signals having an attenuation factor varying in accordance with the magnitude of correlation determined by said vertical correlation detecting means; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and vertical axes; motion detecting means for detecting the magnitude of motion of a picture in response to the signal read out from said frame memory; an attenuator having a gain which is controlled by the magnitude of said motion; and an adder.
Claim 10
Dependent Claim
208 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separating means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures by obtaining |X 1 -X -1 |, |X 1 -X 0 | and |X -1 -X 0 | on the basis of the three sequential scanning lines X -1 , X 0 and X 1 read out from said frame memory; a vertical-axis filter for performing the YC-siganl separation through a filtering operation in the vertical direction; and an attenuator for attenuating the color difference signals having an attenuation factor varying in accordance with the magnitude of correlation determined by said vertical correlation detecting means; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and vertical axes; motion detecting means for detecting the magnitude of motion of a picture f in response to the signal read out from said frame memory; an attenuator having a gain which is controlled by the magnitude of said motion and/or magnitude of said vertical correlation; and an adder.
Claim 11
Dependent Claim
208 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separating means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures by obtaining |X 1 -X -1 |, |X 1 -X 0 | and |X -1 -X 0 | on the basis of the three sequential scanning lines X -1 , X 0 and X 1 read out from said frame memory; a vertical-axis filter for performing the YC-siganl separation through a filtering operation in the vertical direction; and an attenuator for attenuating the color difference signals having an attenuation factor varying in accordance with the magnitude of correlation determined by said vertical correlation detecting means; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and vertical axes; motion detecting means for detecting the magnitude of motion of a picture f in response to the signal read out from said frame memory; an attenuator having a gain which is controlled by the magnitude of said motion and/or magnitude of said vertical correlation; and an adder.
Claim 12
Dependent Claim
215 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separation means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, motion detecting means for detecting the magnitude of motion of a picture image in response to the signal read out from said frame memory, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures in response to the signal read out from said frame memory, a vertical-axis filter for performing YC-signal separation through a filtering operation in the vertical-axis direction and having at least one output, a time-axis filter for performing a filtering operation in the time-axis direction and having at least one output, a two-dimensional filter for performing YC-signal separation through a filtering operation in both the horizontal and vertical directions and having at least one output, and mixing means for mixing the outputs of said three filters in accordance with said magnitude of motion and said magnitude of vertical correlation; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and vertical axes; an attenuator having a gain which is controlled by the magnitude of said motion; and an adder.
Claim 13
Dependent Claim
215 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separation means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, motion detecting means for detecting the magnitude of motion of a picture image in response to the signal read out from said frame memory, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures in response to the signal read out from said frame memory, a vertical-axis filter for performing YC-signal separation through a filtering operation in the vertical-axis direction and having at least one output, a time-axis filter for performing a filtering operation in the time-axis direction and having at least one output, a two-dimensional filter for performing YC-signal separation through a filtering operation in both the horizontal and vertical directions and having at least one output, and mixing means for mixing the outputs of said three filters in accordance with said magnitude of motion and said magnitude of vertical correlation; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and vertical axes; an attenuator having a gain which is controlled by the magnitude of said motion; and an adder.
Claim 14
Dependent Claim
218 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separation means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, motion detecting means for detecting the magnitude of motion of a picture image in response to the signal read out from said frame memory, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures in response to the signal read out from said frame memory, a vertical-axis filter, having at least one output, for performing YC-signal separation through a filtering operation in the vertical-axis direction, a time-axis filter, having at least one output, for performing a filtering operation in the time-axis direction, a two-dimensional filter, having at least one output, for performing YC-signal separation through a filtering operation in both the horizontal and vertical directions, and mixing means for mixing the outputs of said three filters in accordnace with said magnitude of motion and said magnitude of vertical correlation; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and verticl axes; an attenuator having a gain which is controlled by the magnitude of said motion and/or magnitude of said vertical correlation; and an adder.
Claim 15
Dependent Claim
218 words
A signal processing circuit for a composite color television signal, comprising: YC-signal separation means for separating luminance signal (Y) and color difference signal (C), said YC-signal separation means including a frame memory for storing said composite color television signal, motion detecting means for detecting the magnitude of motion of a picture image in response to the signal read out from said frame memory, vertical correlation detecting means for detecting the magnitude of vertical correlation of pictures in response to the signal read out from said frame memory, a vertical-axis filter, having at least one output, for performing YC-signal separation through a filtering operation in the vertical-axis direction, a time-axis filter, having at least one output, for performing a filtering operation in the time-axis direction, a two-dimensional filter, having at least one output, for performing YC-signal separation through a filtering operation in both the horizontal and vertical directions, and mixing means for mixing the outputs of said three filters in accordnace with said magnitude of motion and said magnitude of vertical correlation; filter means for extracting high-frequency components in the horizontal direction or vertical direction or in a two-dimensional plane including the horizontal and verticl axes; an attenuator having a gain which is controlled by the magnitude of said motion and/or magnitude of said vertical correlation; and an adder.
References Cited (Backward Citations)
US4050084A
Cited
US4179705A
Cited
US4389665A
Cited
JPS58115995A
Cited
US4638351A
Cited
JPS6019365A
Cited
US4626895A
Cited
US4626895B1
Cited
US4656501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |