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Motion-compensated temporal recursive filter

A recursive filter, motion compensation technology, used in instruments, image data processing, television, etc.

Inactive Publication Date: 2010-01-27
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So image delay 5 is usually frame delay

Method used

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  • Motion-compensated temporal recursive filter
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  • Motion-compensated temporal recursive filter

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Embodiment Construction

[0033] Figure 4 A motion compensation block according to the invention is shown, where corresponding signals and blocks have the same reference numerals as in the previous figures. The input video signal 1 and the delayed output signal 6 are passed to block motion estimation means 12 for outputting block motion vectors 13 . These block motion vectors are input to the first block splitting means 14 together with the input video signal 1 and the delayed output signal 6, generating sub-block motion vectors 15. Further, block splitting means 16, 18 generate motion vectors 17, 19 for smaller sub-sub-blocks and sub-sub-sub-blocks respectively. The lowest level vector 19 is fed to the image reconstruction means 9 to produce a motion compensated image 11 .

[0034] A method for splitting a field of block motion vectors into sub-block motion vector fields is disclosed in the applicant's co-pending application filed under reference number P115606GB.

[0035] Preferably, the lowest l...

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PUM

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Abstract

Motion compensation means for a time recursive filter includes a block motion estimation module (12) having an input video signal (1) and a input delayed output signal (6) of the time recursive filter. The block motion estimation module outputs block motion vectors (13) to at least one block splitting stage (14, 16, 18) which together with the input video signal (1) and the delayed output signal (6) of the time recursive filter is arranged to produce at least sub-block motion vectors (15, 17, 19) for input into image reconstruction means (9) to produce a motion-compensated image (11).

Description

technical field [0001] The present invention relates to motion compensated temporal recursive filters. Background technique [0002] Noise in digital video sequences poses serious problems for video compression engines. Noise typically has a high spatial (and temporal) frequency coefficient. In video compression, this noise either consumes many bits to encode, or, if the bit rate is too low for the noise to be encoded, leads to unpleasant artifacts. Therefore, it is desirable to remove noise from a video stream before encoding. [0003] time domain recursive filter [0004] FIG. 1 shows a known simple temporal recursive filter (TRF, temporal recursive filter). An input video signal 1 is applied to a first input of a mixer 2 to generate a filtered output video signal 3 . The filtered output signal is fed back through the frame delay buffer 5 to produce a delayed output video signal 6 which is passed to a second input of the mixer 2 . The mixer is controlled by a control...

Claims

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Application Information

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IPC IPC(8): H04N5/14H04N5/21H04N7/26G06T5/20
CPCG06T2207/10016H04N5/21G06T5/20G06T7/2013H04N5/144G06T7/223H04N19/51H04N5/145
Inventor A·R·休格特A·R·琼斯
Owner TELEFON AB LM ERICSSON (PUBL)