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Adaptive interpolation method and system for motion compensated predictive video coding and decoding

A motion compensation prediction, adaptive interpolation technology, applied in the field of video encoding and decoding, can solve problems such as adding computational complexity

Active Publication Date: 2014-03-19
FRANCE TELECOM SA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this two-dimensional (2D) non-separable interpolation filtering technique adds huge computational complexity in the process of filter training and interpolation operation

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  • Adaptive interpolation method and system for motion compensated predictive video coding and decoding
  • Adaptive interpolation method and system for motion compensated predictive video coding and decoding
  • Adaptive interpolation method and system for motion compensated predictive video coding and decoding

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Embodiment Construction

[0029] The invention and its various advantages will be described in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0030] figure 1 is a block diagram showing a video codec 170 with an adaptive interpolation system 110 that is capable of improving video compression efficiency by applying adaptive filter banks during motion compensated prediction.

[0031] Such as figure 1 As shown, the video codec 170 includes an encoder 171 and a decoder 172 . Encoder 171 includes adder 120 , motion compensation module 115 , motion estimation module 105 , encoding module 125 , feedback decoding module 130 , and adaptive interpolation system 110 . The decoder 172 includes a decoding module 135 , a motion compensation module 140 and a reconstruction module 145 .

[0032] The current frame s(t), ie the original image signal to be encoded, is input to the encoder 171 , ie to the adder 120 , the adaptive interpolation system 110 and the motion estimation m...

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Abstract

Disclosed is an adaptive interpolation method and system for motion compensated predictive video codec, and a decoding method and system corresponding to the interpolation method and system. The interpolation method comprises providing a set of filters including F1 and F2 for a current frame; interpolating a reference frame according to the filters; calculating motion vectors to generate a prediction frame; constructing and adaptively training F1 for a first part of sub-pixel positions; constructing and adaptively training F2 for a second part of sub-pixel positions under the constraint of F1; re-training F1 under the constraint of F2; and updating the filters by the trained filters F1 and F2 to further optimize the filters. In the invention, it is possible to minimize the difference between the current frame and its prediction frame by one pass fast algorithm to make it feasible for real-time coding application.

Description

technical field [0001] The present invention relates to video encoding and decoding techniques, in particular, to an adaptive interpolation method and system for improving motion-compensated predictive video encoding and decoding. Background technique [0002] Typical video coding systems are based on motion compensated prediction techniques with motion vectors at fractional pixel resolution. For example, in the video coding standard MPEG-2, motion vectors may have half-pixel resolution (or precision). In the MPEG-4 version of the video coding standard, the resolution of motion vectors may be higher, ie, 1 / 4 pixel resolution. Another technique called Advanced Video Coding (AVC) allows motion vectors to have 1 / 8 pixel resolution. [0003] Recently, a new technique called Adaptive Interpolation Filtering (AIF) has been developed to interpolate multiple pixel resolutions for motion compensated prediction. To minimize the prediction error energy, AIF takes into account change...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/51H04N19/59H04N19/117H04N19/107
CPCH04N19/00066H04N19/00606H04N19/0063H04N19/00721H04N19/00896H04N19/006H04N19/00739H04N19/577H04N19/117H04N19/523H04N19/53H04N19/533H04N19/82
Inventor 王荣刚任真
Owner FRANCE TELECOM SA