Patent ID: 9153242
Filing Date: 2015-10-06
Classification: G10L

Abstract:
1. A coding apparatus that includes at least two coding layers, comprising: a first layer coder that inputs an input signal of a frequency domain thereto, selects a first quantization target band of the input signal from a plurality of sub-bands into which the frequency domain is divided to obtain first band information and obtain a first gain of the input signal of the first quantization target band, generates first coded information including the first band information and first gain coded information obtained by encoding the first gain and generates a difference signal between a decoded signal obtained by performing decoding using the first coded information and the input signal; and a second layer coder that inputs the difference signal thereto, selects a second quantization target band of the difference signal from the plurality of sub-bands to obtain second band information, and obtains a second gain of the difference signal of the second quantization target band to generate second coded information including the second band information and second gain coded information obtained by encoding the second gain, wherein the first layer coder includes a determiner that determines a method of encoding the first gain from a plurality of candidates based on the first band information, and wherein encoded information is transmitted by a transmitter over a transmission line to a decoding apparatus.