METHODS OF DETERMINATION FOR CHROMA QUANTIZATION PARAMETER AND APPARATUSES FOR USING THE SAME

摘要

Disclosed are a method for determining a chrominance component quantization parameter and a device using the same method. An image decoding method comprises: a step of decoding a chrominance component quantization parameter offset based on information of a conversion unit size; and a step of calculating a chrominance component quantization parameter index based on the decoded chrominance component quantization parameter offset. Accordingly, a quantization process is conducted by applying the different chrominance component quantization parameters according to the size of the conversion unit so that the quantization process may be effectively conducted.