US5376971A
Expired / Lapsed
US
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Picture encoding apparatus and picture decoding apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1993-08-30
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Granted: 1994-12-27
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Expires: 2013-08-30
Abstract
Abstract An input picture is blocked in units of a specific number of pixels. A picture corresponding to a reference picture of the input picture is stored in a memory. A motion compensating circuit compares the reference picture stored in the memory and the input picture to calculate a transformation coefficient of an affine transformation making the pixel value difference between the both pictures small. The affine transformation is equivalent to panning or zooming, thus calculation being made for each picture or for every plural pictures. In addition, the motion compensating circuit transforms the input picture with the affine transformation coefficient thus calculated. An encoder collectively encodes the reference picture signal and the transformed signals of all other pictures and simultaneously encodes the affine transformation coefficient to generate an encoded signal.
Inventors
- 👤 Shinya Kadono
- 👤 Masakazu Nishino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:16
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/527; G; G06; G06T; G06T3/00; G06T3/02; H04N19/537
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
201 words
A picture encoding apparatus for encoding an input signal indicative of an input picture sequence of a plurality of pictures, comprising: memory means for storing as a reference picture a predetermined one of said plurality of pictures from among a picture sequence unit formed by a predetermined number of said plurality of pictures of said input picture sequence of said input signal; motion estimating/motion compensating means, coupled to said memory means, for comparing non-reference pictures of said input picture sequence which are pictures of said picture sequence unit other than said reference picture and said reference picture stored in said memory means to determine a transformation coefficient of an affine transformation which cancels an overall motion of said picture sequence unit by reducing a pixel value difference between said pictures of said picture sequence unit, and for subjecting said non-reference pictures to said affine transformation having said transformation coefficient to generate a motion compensated picture; and encoding means, coupled to said memory means and said motion estimating/motion compensating means, for generating an encoded coefficient signal obtained by encoding said transformation coefficient of said affine transformation and an encoded picture signal obtained by encoding said reference picture and said motion compensated picture.
Claim 2
Dependent Claim
201 words
A picture encoding apparatus for encoding an input signal indicative of an input picture sequence of a plurality of pictures, comprising: memory means for storing as a reference picture a predetermined one of said plurality of pictures from among a picture sequence unit formed by a predetermined number of said plurality of pictures of said input picture sequence of said input signal; motion estimating/motion compensating means, coupled to said memory means, for comparing non-reference pictures of said input picture sequence which are pictures of said picture sequence unit other than said reference picture and said reference picture stored in said memory means to determine a transformation coefficient of an affine transformation which cancels an overall motion of said picture sequence unit by reducing a pixel value difference between said pictures of said picture sequence unit, and for subjecting said non-reference pictures to said affine transformation having said transformation coefficient to generate a motion compensated picture; and encoding means, coupled to said memory means and said motion estimating/motion compensating means, for generating an encoded coefficient signal obtained by encoding said transformation coefficient of said affine transformation and an encoded picture signal obtained by encoding said reference picture and said motion compensated picture.
Claim 3
Dependent Claim
61 words
A picture encoding apparatus as claimed in claim 1, wherein said encoding means comprises a blocking circuit for dividing said reference picture and said motion compensated picture into blocks each consisting of a plurality of pixels, and an encoder for collectively encoding said blocks of said reference picture and said motion compensated picture which are located at a same picture position.
Claim 4
Dependent Claim
93 words
A picture decoding apparatus comprising: decoding means for receiving an encoded coefficient signal and an encoded picture signal generated by a picture encoding apparatus, and for decoding therefrom an affine transformation coefficient, a reference picture and a motion compensated picture; and affine transformation means, coupled to said decoding meads, for subjecting said motion compensated picture to an affine transformation which is an inverse transformation to a transformation indicated by said affine transformation coefficient to generate a corresponding decoded picture, and for outputting said reference picture and said decoded picture as a decoded signal.
Claim 5
Dependent Claim
93 words
A picture decoding apparatus comprising: decoding means for receiving an encoded coefficient signal and an encoded picture signal generated by a picture encoding apparatus, and for decoding therefrom an affine transformation coefficient, a reference picture and a motion compensated picture; and affine transformation means, coupled to said decoding meads, for subjecting said motion compensated picture to an affine transformation which is an inverse transformation to a transformation indicated by said affine transformation coefficient to generate a corresponding decoded picture, and for outputting said reference picture and said decoded picture as a decoded signal.
References Cited (Backward Citations)
US4819169A
Cited
US5019910A
Cited
US4855822A
Cited
US4975976A
Cited
JPH02226888A
Cited
US5214504A
Cited
JPH0456491A
Cited
US5280530A
Cited
JPH05130581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |