Video motion characteristic-based macro block adaptive frame/field encoding method and device
A technology of motion characteristics and coding methods, which is applied in the fields of digital video signal modification, television, electrical components, etc., can solve problems such as large amount of calculation, and achieve the effect of speeding up the coding process and reducing the computational complexity.
Active Publication Date: 2012-09-05
VIMICRO ELECTRONICS CORP +1
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Although this existing method can obtain good compression efficiency, it also has a large amount of calculation.
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[0029] Through the experimental analysis of the coding characteristics of frame coding and field coding in practical applications, it is concluded that the frame coding mode is suitable for use in video areas with small motion and large spatial correlation between adjacent lines; while the field coding mode is suitable for use in A video area with a large amount of motion and a large temporal correlation between adjacent lines. Therefore, it is more efficient to use the frame coding mode than the field coding mode for macroblock pairs with less mobility, and not vice versa.
[0030] The invention proposes a macroblock adaptive frame-field coding method based on video motion characteristics. The method first judges whether the input video data is the first frame image of the video. For the first frame image in the video, use the traditional macroblock adaptive frame-field encoding method to encode it, that is, perform frame encoding and field encoding on each macroblock pair i...
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The invention relates to a video motion characteristic-based macro block adaptive frame / field encoding method and a video motion characteristic-based macro block adaptive frame / field encoding device. The video motion characteristic-based macro block adaptive frame / field encoding method comprises the following steps: a, judging whether a current frame is the first frame of the video or at a scene switch position; b, under the condition that a judging result of the step a is negative, judging whether an encoding mode can be directly selected for a current macro block pair according to the motion characteristic of the current macro block pair; and c, under the condition that a judging result of the step b is positive, performing frame encoding or field encoding on the current macro block pair based on the judging result. Due to the preselection of the encoding mode of the current macro block pair, the encoding efficiency obtained by the adaptive frame / field encoding technology of the current macro block is guaranteed, the encoding process is accelerated, and the computational complexity is reduced.
Description
technical field [0001] The present invention relates to an adaptive frame-field encoding method and equipment, in particular to a macroblock adaptive frame-field encoding method and equipment based on video motion characteristics. Background technique [0002] Interlaced scanning technology has been widely used since the birth of television technology. This technology decomposes a frame of image into two fields, of which the top field only contains the odd lines of the image, and the bottom field only contains the even lines of the image. It relies on the vision of the human eye The persistence feature, and some features of the display, make the scan lines of the two fields appear to interweave into one complete image. So far, many precious video materials are in the interlaced scanning format, so for a long time, the interlaced scanning format will still be active on the stage of history as one of the main video formats. [0003] Picture-level adaptive frame-field (PAFF, p...
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IPC IPC(8): H04N7/26H04N19/142H04N19/176
Inventor 于烨
Owner VIMICRO ELECTRONICS CORP