US5426464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field elimination apparatus for a video compression/decompression system
Assignee: GE Technology Development Inc
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Filing: 1994-10-18
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Granted: 1995-06-20
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Expires: 2014-10-18
Abstract
Abstract Video signal compression apparatus includes a memory for storing two fields of image data and providing fields of image data separated by one frame intervals. Image data from corresponding fields of successive frames are subtracted to generate field differences. The field differences are accumulated over respective field intervals, and the sum is compared against a predetermined value. If a sum of differences over a field is less than the predetermined value, the most recent field is considered to be redundant and may be excised. After respective fields are excised, frames of video signal are composed from the remaining fields. The field types (e.g., odd or even) of the fields in the memory are determined, and the data is accessed from the respective fields in memory such that data from odd and even fields occupy odd and even lines in the composed frames respectively. Flags are associated with composed frames to indicate which fields contain data associated with excised fields, and which field of the composed frames should be displayed first.
Inventors
- 👤 Scott D. Casavant
- 👤 Tristan Savatier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:39
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/84; H04N5/87; H04N7/00; H04N7/01; H04N7/0112; H04N19/00; H04N19/70; H04N19/85
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
146 words
Apparatus for compressing video signal comprising: a source of video signal; means for comparing respective even lines of consecutive image frames and respective odd lines of consecutive image frames, and for generating a signal indicative of all even lines in consecutive image frames or all odd lines in consecutive image frames being substantially redundant; means responsive to said signal indicative of all even or all odd lines of image frames being substantially redundant, for excising said all even or all odd lines in ones of image frames containing said all even or all odd substantially redundant lines; means for constructing consecutive image frames of video signal from remaining video signal; means for generating a signal DF indicating the temporal order of occurrence of odd and even lines in respective reconstructed image frames; and means for combining said reconstructed image frames and said signal DF for transmission.
Claim 2
Dependent Claim
146 words
Apparatus for compressing video signal comprising: a source of video signal; means for comparing respective even lines of consecutive image frames and respective odd lines of consecutive image frames, and for generating a signal indicative of all even lines in consecutive image frames or all odd lines in consecutive image frames being substantially redundant; means responsive to said signal indicative of all even or all odd lines of image frames being substantially redundant, for excising said all even or all odd lines in ones of image frames containing said all even or all odd substantially redundant lines; means for constructing consecutive image frames of video signal from remaining video signal; means for generating a signal DF indicating the temporal order of occurrence of odd and even lines in respective reconstructed image frames; and means for combining said reconstructed image frames and said signal DF for transmission.
Claim 3
Dependent Claim
63 words
The apparatus set forth in claim 1 further comprising: means responsive to said signal indicative of all even or all odd lines of image frames being substantially redundant, for generating a signal DT indicating which ones of said reconstructed frames include video data associated with said substantially redundant lines; and means for combining said signal DT with said reconstructed image frames for transmission.
Claim 4
Dependent Claim
73 words
The apparatus set forth in claim 1 wherein said even lines comprise even fields and said odd lines comprise odd fields, and said apparatus includes means responsive to said signal indicative of all even or all odd lines of image frames being substantially redundant, for excising only a predetermined number R of fields for every P consecutive occurring fields from said source of video signal, where R and P are integers with P>R.
Claim 5
Dependent Claim
75 words
The apparatus set forth in claim 1 further including: compression means responsive to said reconstructed image frames for compressing said reconstructed image frames on a frame basis; transport processor means responsive to compressed video data from said compression means, and to said signal DF, for forming transport packets having respective transport headers and payloads, said transport headers being arranged to include said signal DF, and said payloads being arranged to contain said compressed video data.
Claim 6
Dependent Claim
77 words
The apparatus set forth in claim 2 further including: compression means responsive to said reconstructed image frames for compressing said reconstructed image frames on a frame basis; transport processor means responsive to compressed video data from said compression means, and to said signals DF and DT, for forming transport packets having respective headers and payloads, said headers being arranged to include said signals DF and DT, and said payloads being arranged to contain said compressed video data.
Claim 7
Dependent Claim
103 words
Video signal compression apparatus comprising: a source of video signal including even and odd fields; means for respectively comparing even and odd fields from successive frames and if ones of the even or odd fields in successive frames are substantial similar, excising one such similar field per N occurring fields, where N is an integer greater than 2; and means for generating output frames from the remaining non excised fields, for generating first flag data indicating fields to be repeated upon reproduction, and for generating second flag data indicating the order in which fields of respective output frames should be displayed when reproduced.
Claim 8
Dependent Claim
103 words
Video signal compression apparatus comprising: a source of video signal including even and odd fields; means for respectively comparing even and odd fields from successive frames and if ones of the even or odd fields in successive frames are substantial similar, excising one such similar field per N occurring fields, where N is an integer greater than 2; and means for generating output frames from the remaining non excised fields, for generating first flag data indicating fields to be repeated upon reproduction, and for generating second flag data indicating the order in which fields of respective output frames should be displayed when reproduced.
Claim 9
Dependent Claim
51 words
The compression apparatus set forth in claim 6 further including: means responsive to said output frames for compressing said output frames to provide compressed video signal data corresponding to respective output frames; and means for combining in a predetermined sequence, said first and second flag data and corresponding compressed video signal.
Claim 10
Dependent Claim
48 words
The compression apparatus set forth in claim 7 wherein said means for combining includes a transport processor for forming packets of data for transmission, respective packets including a header and a payload, said payload comprising compressed video data and said header including said first and second flag data.
Claim 11
Dependent Claim
50 words
Video signal compression apparatus comprising: a source of video signal including even and odd fields; means for excising ones of even and odd fields which are respectively substantially similar in successive frames; means for generating output frames from the remaining non excised fields; and means for compressing said generated frames.
Claim 12
Dependent Claim
50 words
Video signal compression apparatus comprising: a source of video signal including even and odd fields; means for excising ones of even and odd fields which are respectively substantially similar in successive frames; means for generating output frames from the remaining non excised fields; and means for compressing said generated frames.
Claim 13
Dependent Claim
50 words
The apparatus set forth in claim 9 further including: means, for generating first flag data indicating respective generated output frames which contain a field to be repeatedly displayed when decompressed; and means for generating second flag data indicating which field of respective output frames should be displayed first when reproduced.
Claim 14
Dependent Claim
30 words
The apparatus set forth in claim 9 further including: means, for generating first flag data indicating respective generated output frames which contain a field to be repeatedly displayed when decompressed.
Claim 15
Dependent Claim
43 words
The apparatus set forth in claim 9 further including: means, for generating first flag data indicating respective fields to be repeatedly displayed when decompressed; and means for generating second flag data indicating the order in which fields are to be displayed when reproduced.
Claim 16
Dependent Claim
27 words
The apparatus set forth in claim 12 further including: means for combining in a predetermined sequence, said first and second flag data and corresponding compressed video signal.
Claim 17
Dependent Claim
48 words
The compression apparatus set forth in claim 13 wherein said means for combining includes a transport processor for forming packets of data for transmission, respective packets including a header and a payload, said payload comprising compressed video data and said header including said first and second flag data.
Claim 18
Dependent Claim
76 words
Video signal compression apparatus comprising: a source of video signal occurring as fields/frames circuitry for determining which of successive said fields/frames are substantially similar and excising portions of said fields/frames which are substantially similar; a video signal compressor for compressing the remaining fields/frames; means for generating flag data indicative of fields/frames to be repeated and indicative of the temporal order of reproduced fields/frames; and means for combining compressed video signal and said flag data for transmission.
Claim 19
Dependent Claim
76 words
Video signal compression apparatus comprising: a source of video signal occurring as fields/frames circuitry for determining which of successive said fields/frames are substantially similar and excising portions of said fields/frames which are substantially similar; a video signal compressor for compressing the remaining fields/frames; means for generating flag data indicative of fields/frames to be repeated and indicative of the temporal order of reproduced fields/frames; and means for combining compressed video signal and said flag data for transmission.
Claim 20
Dependent Claim
78 words
The apparatus set forth in claim 15 wherein said video signal includes even and odd fields and said circuitry for determining includes: means for respectively comparing even and odd fields from successive fields/frames and if ones of the even or odd fields in successive fields/frames are substantially similar, excising ones of such substantially similar fields; and said apparatus further includes; means for generating output frames from the remaining non excised fields; and means for compressing said generated frames.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-19 | 1998-12-19 | 1999-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-19 | 2002-12-19 | 2003-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-19 | 2006-12-19 | 2007-06-20 | $7700.00 | Window Closed / Lapsed |