Patent Document ID: 9628814
Application ID: 13395205
Patent Flag: 1

Claim One:
1. A method of decoding a video using inter prediction, the method comprising: obtaining a differential motion vector of a current block and encoded residual signals from a bitstream; defining a candidate set including a plurality of predicted motion vector candidates by deriving the plurality of predicted motion vector candidates from neighboring blocks of the current block; selecting a predicted motion vector of the current block from the plurality of predicted motion vector candidates included in the candidate set; predicting pixels in the current block by using the obtained differential motion vector and the selected predicted motion vector; identifying whether an inverse quantization and an inverse transform from a frequency domain into a spatial domain are to be applied to the encoded residual signals; reconstructing residual signals from the encoded residual signals by selecting, based on the identification of whether the inverse quantization and the inverse transform are to be applied to the encoded residual signals, one of the following processes: skipping both the inverse quantization and the inverse transform from the frequency domain into the spatial domain, to reconstruct the residual signals directly from the encoded residual signals which are neither inversely quantized nor inversely transformed, inversely quantizing the encoded residual signals and skipping the inverse transform of the inversely quantized residual signals from the frequency domain into the spatial domain, to reconstruct the residual signals using the inversely quantized residual signals which are not inversely transformed, and inversely quantizing the encoded residual signals, and then inversely transforming the inversely quantized residual signals from the frequency domain into the spatial domain, to reconstruct the residual signals using the inversely quantized and inversely transformed residual signals; and adding the predicted pixels and the reconstructed residual signals corresponding to the predicted pixels, wherein the neighboring blocks for deriving the plurality of predicted motion vector candidates include: adjacent blocks which are located in a current frame including the current block, and are adjacent to the current block, and at least one block which is located in a reference frame other than the current frame, wherein a location of the at least one block in the reference frame is determined based on a location of the current block in the current frame.