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Coder and coding method

A coding and video coding technology, applied in the field of video coding, can solve problems such as the reduction of coding efficiency, and achieve the effect of high coding efficiency and small delay

Inactive Publication Date: 2010-01-06
HITACHI LTD
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Problems solved by technology

[0013] The present invention aims at the above-mentioned problem of low coding efficiency caused by intra-frame refresh, and proposes a method for dynamically correcting the boundary of the intra-frame refresh area according to the motion vector, which effectively avoids the above-mentioned three shortcomings of the method of selecting the intra-frame refresh path

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Embodiment Construction

[0045] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. However, these embodiments are merely examples of the present invention, and do not limit the present invention.

[0046] figure 1 It represents the video encoding device 100 of the present invention, which includes a frame memory 101 , an intra-frame refresh area controller 102 , an intra-frame encoder 103 , an inter-frame encoder 104 , and a syntax encoder 105 . The frame storage step, the intra-frame refresh area control step, the intra-frame encoding step, the inter-frame encoding step, and the syntax editing step in the video encoding method of the present invention are respectively performed in the frame memory 101, the intra-frame refresh area controller 102, and the intra-frame encoder. 103 , the inter coder 104 and the syntax coder 105 .

[0047] The frame memory 101 receives and stores the image to be encoded, and kee...

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Abstract

The invention relates to a video coder and coding method. The video coder comprises a frame storage, an intra-frame refresh area controller, an intra-frame coder, an inter frame coder and a grammar coder. The intra-frame refresh area controller receives information of images adjacent in coding sequence, the images adjacent in coding sequence comprises a current image and a next image arranged next to the current image; each macro block of the next image searches a motion vector by taking the current image as a reference image; for each predetermined candidate intra-frame refresh area boundary, a matching block crossing from the inside of a candidate intra-frame refresh area boundary to the outside thereof is found for the motion vector; the intra-frame refresh area boundary of the current image is selected in the candidate intra-frame refresh area boundary according to the information of the matching block; and the boundary position information is output. The video coder of the invention can realize coding with short delay and high efficiency.

Description

technical field [0001] The invention relates to video coding technology, in particular to intra-frame refreshing video coding technology in which intra-frame coding and inter-frame predictive coding coexist in one image. Background technique [0002] The intra-frame refresh video coding technology is a technology to make the video stream smooth. At the same time, it has the function of improving the real-time performance of video compression encoding. [0003] Intra-frame coding and inter-frame coding are two methods for compression coding of video sequences. The coding of the video sequence is based on the image as the unit. Intra-frame coding means that when encoding a certain image, the information of other images is not used as a reference. Therefore, when decoding, the decoder can complete the decoding of the image only based on the compressed information of an image. Since adjacent images in a video sequence are usually very similar, that is, there is time redundanc...

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Application Information

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IPC IPC(8): H04N7/26H04N7/36H04N7/50H04N19/55
Inventor 吕越峰藤井由纪夫长屋茂喜
Owner HITACHI LTD
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