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Motion detection device

A motion detection device and motion detection technology are applied in the field of moving image coding, and can solve the problems of deepening the number of pipeline segments, increasing the number of pipeline buffers, and increasing waiting time.

Inactive Publication Date: 2007-04-25
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0040] As in the prior art method described above, the processing capacity of moving image processing is improved through pipeline processing, but conversely, when the number of stages of motion detection increases, the number of pipeline segments increases, the waiting time increases, and the necessary pipeline buffer Disadvantages of increased numbers

Method used

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Experimental program
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Embodiment approach 1

[0121] FIG. 1 is a block diagram of a movement detection device according to Embodiment 1 of the present invention. The motion detection device of this mode is shown in Figure 1, comprises: integer pixel precision motion detector 21, 1 / 2 pixel precision motion detector 22, 1 / 4 pixel precision motion detector 23, local storage 31, 32, 33, SDRAM 41 , DMA controller 42 and processor 20 .

[0122] The integer pixel precision motion detector 21 corresponds to the first motion detection means, the 1 / 2 pixel precision motion detector 22 corresponds to the second motion detection means, and the 1 / 4 pixel precision motion detector 23 corresponds to the third motion detection means.

[0123] The local memory 31 corresponds to a first storage unit, and stores reference image data used by the integer-pixel precision motion detector 21 and image data of a macroblock to be encoded. The local memory 32 corresponds to a second storage means, and stores reference image data used by the 1 / 2 pi...

Embodiment approach 2

[0148] Fig. 8 is a block diagram of a movement detection device according to Embodiment 2 of the present invention. In FIG. 8 , the same reference numerals are assigned to the same components as those in FIG. 1 to omit description.

[0149] The motion detection device of this mode is shown in Figure 8, comprises: integer pixel precision motion detector 21, 1 / 2 pixel precision motion detector 22, motion compensator 24, local memory 31, 32, 33, SDRAM41, DMA controller 42 and processor 20.

[0150] The local memory 31 corresponds to a first storage unit, and stores reference image data used by the integer-pixel precision motion detector 21 and image data of a macroblock to be encoded. The local memory 32 corresponds to a second storage means, and stores reference image data used by the 1 / 2 pixel precision motion detector 22 and image data of a macroblock to be encoded. The local memory 33 corresponds to a third storage means, and stores reference image data used by the motion c...

Embodiment approach 3

[0181] Fig. 14 is a block diagram of a movement detection device according to Embodiment 3 of the present invention. In FIG. 14 , the same reference numerals are assigned to the same components as those in FIG. 1 , and description thereof will be omitted.

[0182] The motion detection device of this mode is shown in Figure 14, comprises: integer pixel precision motion detector 21, 1 / 2 pixel precision motion detector 22, local memory 31, 32, 33, SDRAM41, DMA controller 42 and processor 20 .

[0183] In the motion detection device of this embodiment, motion detection with 1 / 2 pixel precision is performed after motion detection with integer pixel precision, and motion detection with 1 / 4 pixel precision is not performed. In addition, in motion detection with 1 / 2 pixel precision, it is assumed that the pixels of the reference image are not thinned out.

[0184] FIG. 15 is a flowchart of a movement detection device according to Embodiment 3 of the present invention.

[0185] As s...

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Abstract

Reference picture data for full-pel-precision motion detection and picture data of a macroblock to be encoded are transferred from an SDRAM (41) to a local memory (31). The full-pel-precision motion detection is performed by a full-pel-precision motion detecting unit (21), and the transfer region of the reference picture data for quarter-pel-precision motion detection is determined based on the result of the full-pel-precision motion detection. After transferring the reference picture data for half-pel-precision motion detection, the half-pel-precision motion detection by a half-pel-precision motion detecting unit 22 and the reference picture data transfer for quarter-pel-precision motion detection are practiced concurrently. The quarter-pel-precision motion detection is practiced by a quarter-pel-precision motion detecting unit (23). Consequently, the pipeline stages and the pipeline buffers can be diminished in number, thereby accelerating the pipeline processing.

Description

technical field [0001] The present invention relates to moving image coding technology, and particularly relates to a motion detection device for detecting motion vectors of coded images from coded images and reference images. Background technique [0002] Today, moving image transmission technology and storage technology have become very important technologies in enriching our lives. [0003] For example, a long-distance videophone using a portable information terminal becomes possible. In this videophone, since moving images can be transmitted to and from each other in synchronization with audio, communication with rich expressiveness can be realized compared with conventional ones. The transmission path of the videophone is wireless, and the current transmission speed is 64kbps (bit per second). In the future, the speed may be increased to 2Mbps. However, in order to improve the image quality of the image to be transmitted at a relatively low transmission rate, the tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32H04N19/423H04N19/436H04N19/50H04N19/503H04N19/51H04N19/523H04N19/533H04N19/57H04N19/61H04N19/625H04N19/91
CPCH04N7/26776H04N19/00509H04N19/00781H04N7/26755H04N19/00521H04N19/006H04N19/00515H04N19/0063H04N7/50H04N7/26744H04N7/2675H04N7/26808H04N19/43H04N19/433H04N19/436H04N19/523H04N19/53H04N19/61
Inventor 井上昭彦
Owner PANASONIC CORP