Method and apparatus for encoding/decoding images considering low frequency components

摘要

The present disclosure relates to a video encoding/decoding method and apparatus that account for low frequency components. The method includes generating a reconstructed block by performing a predictive encoding on a current block and generating encoded image data, and generating encoded low frequency data by encoding a low frequency component of an error block generated through subtraction of the reconstructed block from the current block, thereby improving the compression efficiency while reducing blocking effects due to transform and quantization operations by encoding images accounting for low frequency components.

主权项

1. A video encoding method performed by a video encoding apparatus, the method comprising:
generating a predicted block by predicting a current block; generating a residual block by subtracting the predicted block from the current block; generating quantized transform coefficients by transforming and quantizing the residual block; generating the encoded image data by encoding the quantized transform coefficients; reconstructing the residual block by inversely quantizing and inversely transforming the quantized transform coefficients; generating a reconstructed block by adding the reconstructed residual block to the predicted block; generating an error block by subtracting the reconstructed block from the current block; generating encoded low frequency data by encoding one or more low frequency components of the error block, and reconstructing the current block by adding the reconstructed block and a reconstructed error block generated from the error block.