Motion vector estimating apparatus, encoder and camera

A motion vector and motion estimation technology, applied in the field of cameras, can solve problems such as affecting the accuracy of block matching, loss of video image details, and inconsistency in global motion estimation, so as to reduce the amount of calculation and improve the efficiency of calculation.

Inactive Publication Date: 2009-01-07
HITACHI LTD
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AI Technical Summary

Problems solved by technology

Due to the loss of video image details during the downsampling process, and some lost key features cause the global motion estimation to be inconsistent with the real movement, thus affecting the block matching accuracy

Method used

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  • Motion vector estimating apparatus, encoder and camera
  • Motion vector estimating apparatus, encoder and camera
  • Motion vector estimating apparatus, encoder and camera

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Embodiment Construction

[0043] The following describes the embodiments of the present invention in detail with reference to the drawings.

[0044] The encoder of the first embodiment of the present invention will be explained in detail, and the basic concepts appearing therein will be explained.

[0045] Figure 7 Represents the typical video content displacement in two frames, the n-1th frame and the nth frame are the video signal source data that will be encoded into the video encoding stream. The n-1th frame is displayed earlier than the nth frame. In the video signal encoding process, the order of the frames in the encoding (stored in the video encoding stream) is usually different from the order of display, which is determined by the order in which the frames are reconstructed. The n-1th frame in this embodiment and the second embodiment described later is encoded into the video encoding stream before the nth frame.

[0046] There are many kinds of motion estimation algorithms, such as block matchi...

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Abstract

The invention provides a motion vector estimation device which comprises a block-matching search unit used for receiving at least three frames from the outside and carrying out the block-matching search between the adjacent frames in sequence from a first frame to a last frame, a motion vector generation unit used for calculating blocks of the adjacent frames, generating motion vectors and then feeding back the motion vectors to the block-matching search unit, wherein, the block-matching search unit carries out the next block-matching search between the adjacent frames after receiving the feedback from the motion vector generation unit. After the block-matching search is carried out on all the adjacent frames by the block-matching search unit, the motion vector generation unit outputs the motion vector between the first frame and the last frame. The motion vector estimation device of the invention can reduce the calculating amount of the motion vectors and improve the calculating efficiency and the accuracy of the motion vectors. In addition, the invention also provides a coder which uses the motion vector estimation device and a camera which uses the coder.

Description

Technical field [0001] The present invention relates to a motion image encoding device, and more particularly to a motion vector estimation device for generating a motion vector, an encoder using the motion vector estimation device, and a video camera using the encoder. Background technique [0002] The so-called motion estimation refers to the process of obtaining motion information between image frame sequences. It is a widely used core technology in video compression, pattern recognition, de-interlacing, and video conversion. The following describes the specific applications of motion estimation in these technical fields. [0003] A moving image consists of a series of frames of images with the same resolution. Adjacent frames usually have many similarities, that is, redundancy. Therefore, the compression coding process of the moving image needs to compress the redundant information of the video, thereby using the motion estimation. Typical moving image coding methods such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/513H04N19/537H04N19/577
Inventor 吕越峰藤井由纪夫寺田光一
Owner HITACHI LTD
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