SCALING COMPRESSED IMAGES

摘要

A method (300) and apparatus (200) for decoding, e.g., an MPEG-like video information stream comprising quantized discrete cosine transform (DCT) coefficients (S2) representing relatively high resolution image information to produce corresponding pixel blocks (S4) having a relatively low image by modifying a quantization matrix to dequantize DCT coefficients in a manner that allows for reduced complexity transformation of the dequantized DCT coefficients into sub-sampled image domain information.