Single pass adaptive interpolation filter

A technology of self-adaptive interpolation and interpolation filter, which is applied in television, electrical components, digital video signal modification, etc., and can solve the problems of increasing power consumption and access time

Inactive Publication Date: 2011-04-27
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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Problems solved by technology

Therefore, greatly increased power consumption and access time

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Embodiment Construction

[0019] As mentioned above, multi-cycle AIF solutions cause latency and computational complexity. In this disclosure, it is proposed to use multiple single-loop AIF designs in video encoding and decoding. An adaptive interpolation filter based on a Wiener filter is an example of a filter type for a single-pass AIF.

[0020] When an encoder with a single-cycle AIF receives an input frame F T , for frame F T The competitive filter set (competitive filter set, CFS) of the special area of ​​, is already available for local filter selection. A competitive filter set includes filter coefficients for N different interpolation filters. Note that N can be a fixed or variable number and can be transmitted adaptively in the bitstream for each frame. In some embodiments, filter selection is performed at the block level, eg, prediction partitions, macroblock or super-macroblock level. input frame F T Each module of can perform calculations to select an optimal filter from a set of com...

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Abstract

The invention provides a method for performing single-pass adaptive interpolation filtering, an encoder and a decoder, wherein the method for performing single-pass adaptive interpolation includes: receiving the video frames; selecting an interpolation filter from a competitive filter set; performing motion prediction on a current frame of the video frame utilizing the interpolation filter; encoding the current frame into the bitstream; and updating the competitive filter set for a next frame by using the optimal interpolation filter. The method for performing single-pass adaptive interpolation filtering and the encoder provided by the invention can reduce encoding delay and indirect expenditure of access of a memorizer. The encoder of the invention can improve the encoding efficiency.

Description

technical field [0001] The present invention relates to adaptive interpolation filters, and more particularly, to an adaptive interpolation filter that uses only single-cycle coding to perform filtering processing. Background technique [0002] In the motion compensation prediction process, displacement vectors with fractional pixel resolution (eg, 1 / 4 pixel or 1 / 8 pixel) are used to improve prediction accuracy. To estimate and compensate for these sub-pixel displacements, interpolation filters are used in video encoding and decoding. Compared with the traditional fixed interpolation filter, the Adaptive Interpolation Filter (AIF) further enhances the coding efficiency by providing different filters for different internal images of a sequence. The AIF based on the Wiener filter (Wiener filter) is a very popular one, which can effectively reduce the prediction error after filtering. This type of AIF compensates for some non-stationary statistical properties of the video sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/46
CPCH04N7/364H04N19/00066H04N7/26377H04N19/00278H04N19/0089H04N7/26244H04N7/26058H04N19/00739H04N19/117H04N19/176H04N19/523H04N19/80
Inventor 郭峋张凯黄毓文傅智铭雷少民
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE
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