METHOD AND AN APPARATUS FOR DECODING A VIDEO

摘要

The present disclosure relates to a method and an apparatus for motion vector encoding/decoding through estimations of multiple motion vectors, and to a method and an apparatus for video encoding/decoding using the same. The disclosure provides a motion vector encoding apparatus including a motion vector estimator for estimating a plurality of motion vectors with estimating one of the plurality of motion vectors as a motion vector of a current block and estimating the remaining motion vectors by one or more predefined estimation criteria in agreement with a video decoding apparatus; and a motion information encoder for encoding motion information generated by using the plurality of motion vectors. According to the disclosure, estimations are enabled by using more accurate motion vectors while reducing the bit rate for encoding the motion vectors leading to an improvement of the compressing efficiency.

主权项

1. A video decoding apparatus using an inter prediction, the apparatus comprising
an information extractor configured to obtain motion information and residual data from encoded data; a predictor configured to generate a predicted block by performing the inter prediction based on the obtained motion information; a decoder configured to
identify one or more conditions for enabling an inverse quantization and an inverse transform,skip both of the inverse quantization and the inverse transform for the obtained residual data to thereby reconstruct a residual block directly from the obtained residual data, if the one or more identified conditions indicate skipping of both the inverse quantization and the inverse transform,inversely quantize the obtained residual data and skipping the inverse transform for the inversely quantized residual data to thereby reconstruct a residual block using the inverse-quantized residual data, if the one or more identified conditions indicate skipping of the inverse transform, andinversely quantize the obtained residual data and inversely transform the inversely quantized residual data to thereby reconstruct a residual block using the inverse transformed residual data, if the one or more identified conditions indicate non-skipping of both the inverse quantization and the inverse transform; and an adder configured to add each pixel value of the predicted block to a corresponding pixel value of the reconstructed residual block.