Compression encoding means a series of signal processing technology for transmitting digitalized information through a communication line or for storing digitalized information in a form appropriate to a storage medium. Media such video, an image, and a voice may be a target of compression encoding, particularly, technology that performs compression encoding using video as a target is referred to as video compression.
Next generation video contents will have a characteristic of a high spatial resolution, a high frame rate, and high dimensionality of scene representation. In order to process such contents, memory storage, memory access rate, and processing power technologies will remarkably increase.
Therefore, it is necessary to design a coding tool for more efficiently processing next generation video contents.
In particular, in the case of coding a prediction mode, the prediction mode of a neighbor block is employed to predict the prediction mode of a current block. The more accurate the prediction mode of a neighbor block is, the more accurate the prediction mode of a current block may be predicted. Therefore, it is necessary to improve the prediction mode of a neighbor block.
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