US4760446A
Expired / Lapsed
US
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Method and apparatus for detecting the motion of image in a television signal
Assignee: Japan Broadcasting Corp
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Filing: 1987-09-29
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Granted: 1988-07-26
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Expires: 2007-09-29
Abstract
Abstract A method and apparatus for detecting the motion of image in a television signal is intended for a decoder of a multiple subsampling transmission signal without an interframe aliased portion in a lower frequency region. In the method and apparatus for detecting the motion, a next-adjacent interframe difference signal, an immediate-adjacent interframe difference narrow-band signal and an immediate-adjacent interframe difference broad-band signal or compensated versions of these signals are combined with maximum-value selection circuits and a minimum-value selection circuit for selecting the maximum-value and minimum-value among these three sets of signals so that a proper motion signal is extracted from the transmission signal.
Inventors
- 👤 Yuichi Ninomiya
- 👤 Seiichi Gohshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:47
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/85; H04N19/89; H04N7/00; H04N7/12; H04N7/122; H04N7/125; H04N7/015; H04N7/0152
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A method of detecting the motion of image in a television signal of the multiple subsampling transmission system in which a television signal is transmitted with the transmission bandwidth thereof being compressed so as not to include an interframe aliased portion in a lower frequency region, said method comprising the steps of: producing three signals including a next-adjacent interframe difference signal, an immediate-adjacent interframe difference narrow-band signal without the interframe aliased portion and an immediate-adjacent interframe difference broad-band signal with the interframe aliased portion; taking a maximum-value between prescribed two signals among said next-adjacent interframe difference signal or a signal related thereto, said immediate-adjacent interframe difference narrow-band signal or a signal related thereto and said immediate-adjacent interframe difference broad-band signal or a signal related thereto; and taking a minimum-value between a resulting maximum-value signal and a remaining signal other than said two signals so that a resulting minimum-value signal is validated as a motion signal which indicates the motion of image.
Claim 2
Independent Claim
161 words
A method of detecting the motion of image in a television signal of the multiple subsampling transmission system in which a television signal is transmitted with the transmission bandwidth thereof being compressed so as not to include an interframe aliased portion in a lower frequency region, said method comprising the steps of: producing three signals including a next-adjacent interframe difference signal, an immediate-adjacent interframe difference narrow-band signal without the interframe aliased portion and an immediate-adjacent interframe difference broad-band signal with the interframe aliased portion; taking a maximum-value between prescribed two signals among said next-adjacent interframe difference signal or a signal related thereto, said immediate-adjacent interframe difference narrow-band signal or a signal related thereto and said immediate-adjacent interframe difference broad-band signal or a signal related thereto; and taking a minimum-value between a resulting maximum-value signal and a remaining signal other than said two signals so that a resulting minimum-value signal is validated as a motion signal which indicates the motion of image.
Claim 3
Dependent Claim
67 words
A method according to claim 1 wherein said step of taking a maximum-value comprising the step of taking a maximum-value between said next-adjacent interframe difference signal or the related signal and said immediate-adjacent interframe difference narrow-band signal or the related signal, and said step of taking a minimum-value comprising the step of taking a minimum-value between a resulting maximum-value signal and said immediate-adjacent interframe difference broad-band signal.
Claim 4
Dependent Claim
50 words
A method according to claim 2, wherein said signal related to said next-adjacent interframe difference signal comprises a compensation signal which is produced by taking a maximum-value between said next-adjacent interframe difference signal and a signal produced by motion compensation for a next-adjacent interframe difference signal preceding by one frame.
Claim 5
Independent Claim
184 words
An apparatus for detecting the motion of image in a television signal intended for a decoder for decoding a television transmission signal which has been bandwidth-compressed based on the multiple subsampling transmission system so as not to include an interframe aliased portion in a lower frequency region, said decoder comprising means responsive to said transmission signal for generating a next-adjacent interframe difference signal or a signal related thereto, an immediate-adjacent interframe difference narrow-band signal without the interframe aliased portion or a signal related thereto and an immediate-adjacent interframe difference broad-band signal with the interframe aliased portion, and an image motion detection means for detecting the motion of image in said transmission signal, wherein said image motion detection means comprises: a first maximum-value selection circuit which receives said next-adjacent interframe difference signal or the related signal and said immediate-adjacent interframe difference narrow-band signal or the related signal to select a maximum-value between said input signals; and a minimum-value selection circuit which receives said immediate-adjacent interframe difference broad-band signal and the output signal from said maximum-value selection circuit to select a minimum-value between said input signals.
Claim 6
Independent Claim
184 words
An apparatus for detecting the motion of image in a television signal intended for a decoder for decoding a television transmission signal which has been bandwidth-compressed based on the multiple subsampling transmission system so as not to include an interframe aliased portion in a lower frequency region, said decoder comprising means responsive to said transmission signal for generating a next-adjacent interframe difference signal or a signal related thereto, an immediate-adjacent interframe difference narrow-band signal without the interframe aliased portion or a signal related thereto and an immediate-adjacent interframe difference broad-band signal with the interframe aliased portion, and an image motion detection means for detecting the motion of image in said transmission signal, wherein said image motion detection means comprises: a first maximum-value selection circuit which receives said next-adjacent interframe difference signal or the related signal and said immediate-adjacent interframe difference narrow-band signal or the related signal to select a maximum-value between said input signals; and a minimum-value selection circuit which receives said immediate-adjacent interframe difference broad-band signal and the output signal from said maximum-value selection circuit to select a minimum-value between said input signals.
Claim 7
Dependent Claim
97 words
An apparatus according to claim 4 further comprising a circuit portion including a frame memory in which said next-adjacent interframe difference signal is entered and a motion compensation circuit, and a second maximum-value selection circuit which receives a current next-adjacent interframe difference signal and a motion-compensated next-adjacent interframe difference signal preceding by one frame provided by said circuit portion to select a maximum-value between said input signals, said signal related to said next-adjacent interframe difference signal entered to said first maximum-value selection circuit being a signal compensated by said circuit portion and said second maximum-value selection circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |