APPARATUS AND METHOD FOR ENCODING AND DECODING MOVING PICTURE USING ADAPTIVE SCANNING

摘要

Provided is an apparatus and method for encoding/decoding a moving picture based on adaptive scanning. The moving picture apparatus and method can increase a compression rate based on adaptive scanning by performing intra prediction onto blocks of a predetermined size, and scanning coefficients acquired from Discrete Cosine Transform (DCT) of a residue signal and quantization differently according to the intra prediction mode. The moving picture encoding apparatus includes: a mode selector for selecting and outputting a prediction mode; a predictor for predicting pixel values of pixels to be encoded of an input video based on the prediction mode to thereby output a residue signal block; a transform/quantization unit for performing DCT onto the residue signal block and quantizing the transformed residue signal block; and an encoder for adaptively scanning and encoding the quantized residue signal block based on the prediction mode.

主权项

1. A method of decoding motion pictures based on adaptive scanning, the method comprising:
performing entropy decoding of an encoded bitstream to obtain entropy-decoded signals; determining a scanning method for the entropy-decoded signals; recovering a picture from the entropy-decoded signals according to the scanning method; and outputting the recovered picture; wherein the scanning method is an adaptive scanning method according to an intra prediction mode for the entropy-decoded signals and comprises:
scanning entropy-decoded signals of a first row with priority so that all of the entropy-decoded signals of the first row are scanned prior to scanning entropy-decoded signals of any other row in response to the intra prediction mode being a vertical mode; andscanning entropy-decoded signals of a first column with priority so that all of the entropy-decoded signals of the first column are scanned prior to scanning entropy-decoded signals of any other column in response to the intra prediction mode being a horizontal mode.