Scalable video encoding method and decoding method, apparatuses therefor, programs therefor, and storage media which store the programs
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United States of America Patent
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Jul 5, 2016
Grant Date -
Dec 30, 2010
app pub date -
Jul 1, 2008
filing date -
Jul 2, 2007
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Abstract
A scalable video encoding method of performing encoding by predicting an upper-layer signal having a relatively high spatial resolution by means of interpolation using an immediately-lower-layer signal having a relatively low spatial resolution. The method computes a first weighting coefficient for each image area of a predetermined unit size in a search for estimating a motion between an encoding target image area in an upper layer and a reference image area, where the first weighting coefficient is computed based on a brightness variation between an image area, which belongs to an immediately-lower layer and has the same spatial position as the encoding target image area, and the reference image area; and performs a motion estimation using a signal which is obtained by correcting a decoded signal of the reference image area by the first weighting coefficient and functions as an estimated signal in the motion estimation, so as to compute a motion vector. Then the method computes a second weighting coefficient based on a brightness variation between a reference image area indicated by the motion vector and the image area which belongs to the immediately-lower layer and has the same spatial position as the encoding target image area; and determines a signal, which is obtained by correcting a decoded signal of the reference image area by using the second weighting coefficient, to be a compensated signal in motion compensation, which functions as a predicted signal of the encoding target image area.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- NIPPON TELEGRAPH AND TELEPHONE CORPORATION
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Bandoh, Yukihiro | Yokosuka, JP | 13 | 102 |
Hayase, Kazuya | Yokosuka, JP | 15 | 47 |
Kamikura, Kazuto | Yokosuka, JP | 34 | 1392 |
Takamura, Seishi | Yokosuka, JP | 38 | 357 |
Yashima, Yoshiyuki | Yokosuka, JP | 26 | 754 |
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