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Device and method for detecting motion vector, device and method for encoding moving image, and device and method for decoding moving image
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A motion vector and detection device technology, applied in image communication, television, electrical components, etc., can solve the problem of reducing and limiting the amount of code, and achieve the effect of reducing the amount of code
Active Publication Date: 2013-05-08
OKI ELECTRIC IND CO LTD
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[0005] However, in H.264 / AVC standard variable block size motion compensation, when the partition and motion vector of the optimal size are obtained, the motion vector information of the partition is encoded, even if there is a nearby motion that can be regarded as the same The partitions involved in the vector must also encode the motion vector information for each partition, so there is a limitation in the reduction of the code amount
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no. 1 Embodiment approach
[0031] Hereinafter, a first embodiment of a motion vector detection device and method, a video encoding device and method, and a video decoding device and method according to the present invention will be described with reference to the drawings.
[0032] (A-1) Video coding device of the first embodiment
[0033] figure 2 It is a block diagram showing the overall configuration of the video encoding device 1 according to the first embodiment. The video coding device 1 of the first embodiment is generally a device conforming to the H.264 / AVC standard, for example.
[0034] exist figure 2 Among them, the moving image encoding device 1 has: a block divider 2, a prediction error signal generator 3, an orthogonal transformer 4, a quantizer 5, an encoder 6, an inverse quantizer 7, an inverse orthogonal transformer 8, and a decoded image generator 9, a decoded image memory 10, an inter predictor 11, an intra predictor 12, and a predictive image generator 13.
[0035] The block d...
no. 2 Embodiment approach
[0133] Next, a second embodiment of the motion vector detection device and method, video encoding device and method, and video decoding device and method of the present invention will be described. In addition, the first embodiment can be figure 1 , figure 2 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As it is, it is a drawing of the second embodiment.
[0134] In the first embodiment described above, when the partition combiner 23 combines the partitions based on the motion vector information output from the partition shape determiner 22, if there are partitions with the same reference image and motion vector, the positions of these partitions Relationships combine partitions independently.
[0135] However, in combining partitions like the first embodiment, there are extremely many types of partitions after combining. Therefore, the code amount of the macroblock type for determining the shape of the combined partition increases, which may cancel out the reducti...
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Abstract
A motion vector detection apparatus that obtains, for each of the blocks of a predetermined size into which one frame is divided, motion vector information in units of a plurality of partitions of differing rectangular shapes and differing sizes, up to the size of the blocks, has a partition connector means (23) that, when motion vectors for a plurality of partitions are obtained for one of the blocks, decides whether or not to connect a plurality of the partitions for which the motion vectors are obtained, and if the partitions are connected, includes motion vector information about the resulting connected partition in the motion vector information output from the motion vector detection apparatus. The motion vector encoding rate can be reduced.
Description
technical field [0001] The present invention relates to a motion vector detection device and method, a moving picture encoding device and method, and a moving picture decoding device and method, and can be applied to moving picture encoding and decoding in accordance with the H.264 / AVC standard, for example. Background technique [0002] In most moving image coding methods including the H.264 / AVC standard, one image (one frame) is divided into multiple blocks, and the motion relative to the encoded image is predicted on a block-by-block basis. motion compensation. The smaller the block size of the motion compensation, the finer the prediction can be performed, but since it is necessary to encode the motion vector information for each block, the code amount increases. [0003] Therefore, in the H.264 / AVC standard, a strategy of switching from several motion compensation block sizes (hereinafter referred to as partitions) to select the optimal block size (motion compensation ...
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