US4947248A
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US
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Hybrid encoder for video signals comprising a motion estimator and an inter-intraframe encoding selector which comprise a common calculation module
Assignee: Nokia of America Corp
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Filing: 1989-04-05
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Granted: 1990-08-07
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Expires: 2009-04-05
Abstract
Abstract A hydrid encoder for video pictures comprising a motion estimator, and an inter-intraframe encoding selector which comprise a common calculation module. Known hybrid encoders for transmitting video pictures comprise a motion estimator and an inter-intraframe encoding selector. Due to the required high processing rate the motion estimator and the inter-intraframe encoding selector must have a parallel processing structure which leads to quite a considerable number of components. To this end a calculation module is proposed which can be used in the motion estimator and in the inter-intraframe encoding selector. Use of this invention, for example in hybrid encoders for video telephone apparatus.
Inventors
- 👤 Klaus Hienerwadel
- 👤 Gerald Weth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:23
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/10; H04N19/102; H04N19/103; H04N19/107; H04N19/50; H04N19/503; H04N19/51; H04N19/60; H04N19/61
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
48 words
A hybrid encoder for video pictures in which neighboring pixels of an actual video picture are combined into a plurality of actual sub-blocks, which encoder comprises a motion estimator and an inter-intraframe encoding selector, wherein said motion estimator and said inter-intraframe encoding selector comprise a common calculation module.
Claim 2
Dependent Claim
48 words
A hybrid encoder for video pictures in which neighboring pixels of an actual video picture are combined into a plurality of actual sub-blocks, which encoder comprises a motion estimator and an inter-intraframe encoding selector, wherein said motion estimator and said inter-intraframe encoding selector comprise a common calculation module.
Claim 3
Dependent Claim
45 words
A hybrid encoder as claimed in claim 1 wherein the calculation module comprises a subtractor whose output signal is applied via a device for forming an absolute value to a summing device, a first actual sub-block being applied to a first input of the subtractor.
Claim 4
Dependent Claim
75 words
A circuit arrangement as claimed in claim 2 wherein a second input of the subtractor is connected to the output of a multiplexer and a first input of the multiplexer is connected to a picture memory in which a plurality of previous sub-blocks of a previous video picture are stored and in that a second input of the multiplexer is connected to a register whose input is connected to the output of the calculation module.
Claim 5
Dependent Claim
31 words
A circuit arrangement as claimed in claim 3, wherein the output value of the multiplexer or the contents of the register is set to zero by means of a control command.
Claim 6
Dependent Claim
30 words
A circuit arrangement as claimed in claim 3 wherein the output value of the register is reduced by a predetermined factor with respect to the input value of the register.
Claim 7
Dependent Claim
26 words
A circuit arrangement as claimed in claim 5, wherein the factor corresponds to the reciprocal value of the number of pixels of said first actual sub-block.
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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |