Patent ID: 8391360

Claim:
An encoding and transmitting method for encoding image data and multiplexing a bit stream in an encoding and transmitting system, the method comprising: setting, in an encoding unit in the encoding and transmitting system, a weight parameter that is added to a luma quantization parameter by an addition operation in a dequantization process that is used when a chroma quantization parameter is calculated on the basis of the luma quantization parameter weighted by the addition operation in the dequantization process; quantizing, in the encoding unit in the encoding and transmitting system, a luma component of image data using the luma quantization parameter and a chroma component of image data using the chroma quantization parameter, and generating quantized coefficients; encoding, in the encoding unit in the encoding and transmitting system, the quantized coefficients and generating the bit stream; and multiplexing, in a multiplexing unit in the encoding and transmitting system, the bit stream and generating a system stream.