| 摘要 |
PURPOSE: An audio decoding device for restoring high frequency components with few calculations is provided to generate high frequency components of a skipped frame by using high frequency components of a previous frame by channel if left/right channel signals are not similar, thereby reducing calculations. CONSTITUTION: An audio decoder(210) inputs encoded audio data to decode the audio data, makes the decoded data audio signals of the first channel and the second channel, and outputs the audio signals. A channel similarity decider(220) decides whether the first channel signal is similar to the second channel signal. A high frequency component generator(230) generates high frequency components for each channel, depending on whether the first channel signal is similar to the second channel signal. An audio synthesizer(240) synthesizes the generated high frequency components with the decoded audio signals, and outputs the synthesized audio signals.
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