Patent US1729938A successfully refreshed from Google Patents.
Patent US1343149A successfully refreshed from Google Patents.
Patent EP0263375A2 successfully refreshed from Google Patents.
EP0263375A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A method and apparatus for detecting the motion of image in a television signal
Assignee: Japan Broadcasting Corp
•
Filing: 1987-09-25
•
Granted: —
•
Expires: 2007-09-25
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 (33, 34) and a minimum-value selection circuit (35) 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
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:56
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
189 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 (4) for generating basing on said transmission signal 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 immediateadjacent interframe difference broad-band signal with the interframe aliased portion, and an image motion detection means (30) for detecting the motion of image in said transmission signal, wherein said image motion detection means comprising: a first maximum-value selection circuit (34) 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 (35) which receives said immediate-adjacent interframe difference broad-band signal and the output signal from said maximum-value selection circuit (34) to select a minimum-value between said input signals.
Claim 6
Independent Claim
189 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 (4) for generating basing on said transmission signal 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 immediateadjacent interframe difference broad-band signal with the interframe aliased portion, and an image motion detection means (30) for detecting the motion of image in said transmission signal, wherein said image motion detection means comprising: a first maximum-value selection circuit (34) 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 (35) which receives said immediate-adjacent interframe difference broad-band signal and the output signal from said maximum-value selection circuit (34) to select a minimum-value between said input signals.
Claim 7
Dependent Claim
101 words
An apparatus according to claim 4 further comprising a circuit portion including a frame memory (31) in which said next-adjacent interframe difference signal is entered and a motion compensation circuit (32), and a second maximum-value selection circuit (33) 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 (34) being a signal compensated by said circuit portion and said second maximum-value selection circuit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.