Method and apparatus for lossy compression encoding data and corresponding method and apparatus for reconstructing data

摘要

The invention proposes modification of quantized coefficients for signalling of a post-processing method.Therefore, it is proposed a method for lossy compress-encoding data comprising at least one of image data and audio data. Said method comprises determining quantized coefficients using a quantization of a discrete cosine transformed residual of a prediction of said data. Said method further comprises modifying said quantized coefficients for minimizing rate-distortion cost wherein distortion is determined using a post-processed reconstruction of the data, the post-processed reconstruction being post-processed according to a post-processing method, and compress-encoding said modified coefficients. In said proposed method, the post-processing method is that one ofn1different predetermined post processing method candidates whose position in an predetermined order of arrangement of the post processing method candidates equals a remainder of division, byn,of a sum of the modified coefficients.Doing so removes the overhead of flags in the bit stream.