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Motion vector detecting device and motion vector detecting method

A motion vector and detection device technology, applied in television, electrical components, digital video signal modification, etc., can solve the problems of reducing bit rate, image quality deterioration, and inability to change the bit amount.

Active Publication Date: 2009-08-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a problem with this general method that when coding at a low bit rate, the amount of bits related to the motion vector cannot be changed, so reducing the bit rate by reducing the amount of bits related to the difference component results in a significant deterioration of the image quality

Method used

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  • Motion vector detecting device and motion vector detecting method
  • Motion vector detecting device and motion vector detecting method
  • Motion vector detecting device and motion vector detecting method

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Experimental program
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Embodiment approach 1

[0032] figure 2 is a block diagram of the configuration of the motion vector detection device according to Embodiment 1 of the present invention.

[0033] The motion vector detecting device 100 is a device for detecting a motion vector through a 2-stage pipeline, and as figure 2As shown, there are: a frame memory 101 , a first motion detection unit 102 , a weight coefficient calculation unit 103 , a predictive vector generation unit 104 , and a second motion detection unit 105 . Among them, the first motion detection unit 102 performs a motion vector search with integer pixel precision, and the second motion detection unit 105 performs a motion vector search with half-pixel precision centered on the first motion vector MV1 detected by the first motion detection unit 102 . search. Also, a case is taken as an example in which motion vector detection is performed in units of macroblocks with a block size of 16×16 pixels, and the reference image is 1 frame. At the same time, ...

Embodiment approach 2

[0050] In Embodiment 1, the motion detection unit of the first stage detects a motion vector based on an evaluation value obtained by adding a correction value to the amount of distortion, and detects it by using the amount of distortion as an evaluation value in the motion detection unit of the second stage. However, in the present embodiment, the case where the motion vector is detected based on an evaluation value obtained by adding a correction value to the distortion amount in the first-stage and second-stage motion detection units will be described.

[0051] Figure 6 is a block diagram of a configuration of a motion vector detection device according to Embodiment 2 of the present invention.

[0052] The motion vector detecting device 200 is a device for detecting a motion vector through a 2-stage pipeline, such as Figure 6 Shown has: frame memory 201, first motion detection unit 202, first weight coefficient calculation unit 203, first predictor vector generation unit...

Embodiment approach 3

[0063] In Embodiment 2, in the first-stage and second-stage motion detection sections, when detecting a motion vector based on an evaluation value obtained by adding a correction value to a distortion amount, the predictions generated by the corresponding prediction vector generation sections are used, respectively. The correction value is calculated using a vector, but this embodiment describes the case where a common predictor vector is used when calculating the correction value in the first-stage and second-stage motion detection units.

[0064] Figure 7 is a block diagram of a configuration of a motion vector detection device according to Embodiment 3 of the present invention.

[0065] The motion vector detection device 300 is a device for detecting a motion vector through a 2-stage pipeline, such as Figure 7 As shown, there are: a frame memory 301 , a first motion detection unit 302 , a weight coefficient calculation unit 303 , a predictive vector generation unit 304 ,...

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Abstract

To provide a motion vector estimating device which is capable of calculating the optimum motion vector by a trade-off between the bit rate of a motion vector and a differential amount, and estimating a motion vector in a pipeline structure at high speed, a motion vector estimating method which enables the same. The motion vector estimating device (100) includes: a first motion vector estimating unit (102) which calculates an evaluation value based on the amount of distortion calculated using search blocks and an input block and a correction value calculated using a motion vector with respect to each search block, a first prediction vector, and a weighting coefficient, and estimates a first motion vector of the input block based on the location of the input block and the location of a search block which provides the smallest evaluation value; a weighted coefficient calculating unit (103) which calculates the weighted coefficient; a prediction vector generating unit (104) which generates the first motion vector based on the first motion vector; and a second motion estimating unit (105) which estimates a motion vector determining, as an evaluation value, only the amount of distortion calculated using the search blocks and the input block.

Description

technical field [0001] The invention relates to a motion vector detection device and a motion vector detection method, which are used for detecting motion vectors of inter-picture predictive coding of moving images. Background technique [0002] For an image compression method that utilizes correlation between pictures of a moving image, such as the MPEG method (Moving Picture Experts Group; Moving Picture Image Coding Exparts Group), it is necessary to detect a motion vector in units of blocks for which motion compensation is performed. Conventionally, as a circuit for detecting the motion vector, a motion vector detection circuit capable of reducing the information amount of the motion vector has been proposed (for example, refer to Patent Document 1). [0003] figure 1 is a block diagram showing the configuration of a conventional motion vector detection circuit. like figure 1 As shown, this motion vector detection circuit includes frame memories 61 and 62 , a memory 6...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/32H04N19/50H04N19/42H04N19/436H04N19/51H04N19/523H04N19/533H04N19/56H04N19/57
CPCH04N19/00781H04N19/00278H04N19/00606H04N19/00521H04N19/00672H04N19/0063H04N19/00696H04N19/52H04N19/176H04N19/61H04N19/436H04N19/533H04N19/523H04N19/567
Inventor 大古濑秀之稻垣寻纪角野真也
Owner PANASONIC CORP