Patent ID: 8090587

Claim:
A method of receiving a bitstream and decoding audio signal with a plurality of channels, the method comprising: extracting quantized spatial parameters and quantization information from a bitstream, the spatial parameters including a quantized channel level difference (CLD) between a pair of channels of the plurality of channels, a quantized Inter Channel Correlation (ICC) and a quantized Channel Prediction Coefficient (CPC), and the quantization information regarding a quantization mode; and inverse-quantizing the quantized spatial parameters using a plurality of quantization tables including a quantization table for CLD, the quantization table for CLD having a plurality of indices and CLD values, wherein the quantized CLD is inverse-quantized into one among CLD values using the quantization table for CLD if the quantization mode is a first mode, and the quantized CLD is inverse-quantized into one among a part of the CLD values using the quantization table for CLD if the quantization mode is a second mode.