MULTI-CHANNEL DECODING DEVICE, MULTI-CHANNEL DECODING METHOD, PROGRAM, AND SEMICONDUCTOR INTEGRATED CIRCUIT
First Claim
1. A multi-channel decoding device which converts an input audio signal of an input channel count that is at least one into output audio signals of an output channel count that is greater than the input channel count, said multi-channel decoding device comprising:
- a first expansion unit configured to generate expansion signals of the output channel count by expanding a channel count of the input audio signal of the input channel count; and
a first addition unit configured to generate one of the output audio signals of the output channel count by adding, at a predetermined ratio, one of the expansion signals of the output channel count and the input audio signal.
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Abstract
The multi-channel decoding device (20) according to the present invention is a multi-channel decoding device which converts a monaural frequency signal (106) of an input channel count that is at least one into adjustment frequency signals (109) of an output channel count that is greater than the input channel count. The multi-channel decoding device (20) includes a channel expansion unit (102) which generates expansion frequency signals (107) of the output channel count by expanding the channel count of the monaural frequency signal (106) of the input channel count, and a sound quality adjustment unit (132) which generates the adjustment frequency signals (109) of the output channel count by adding, at a predetermined ratio, one of the expansion frequency signals (107) of the output channel count and the monaural frequency signal (106).
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Citations
13 Claims
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1. A multi-channel decoding device which converts an input audio signal of an input channel count that is at least one into output audio signals of an output channel count that is greater than the input channel count, said multi-channel decoding device comprising:
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a first expansion unit configured to generate expansion signals of the output channel count by expanding a channel count of the input audio signal of the input channel count; and a first addition unit configured to generate one of the output audio signals of the output channel count by adding, at a predetermined ratio, one of the expansion signals of the output channel count and the input audio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multi-channel decoding method for converting an input audio signal of an input channel count that is at least one into output audio signals of an output channel count that is greater than the input channel count, said method comprising:
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generating expansion signals of the output channel count by expanding a channel count of the input audio signal of the input channel count; and generating one of the output audio signals of the output channel count by adding, at a predetermined ratio, one of the expansion signals of the output channel count and the input audio signal.
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12. A program causing a computer to execute a multi-channel decoding method for converting an input audio signal of an input channel count that is at least one into output audio signals of an output channel count that is greater than the input channel count, the method comprising:
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generating expansion signals of the output channel count by expanding a channel count of the input audio signal of the input channel count; and generating one of the output audio signals of the output channel count by adding, at a predetermined ratio, one of the expansion signals of the output channel count and the input audio signal.
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13. A semiconductor integrated circuit which converts an input audio signal of an input channel count that is at least one into output audio signals of an output channel count that is greater than the input channel count, said semiconductor integrated circuit comprising:
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a first expansion unit configured to generate expansion signals of the output channel count by expanding a channel count of the input audio signal of the input channel count; and a first addition unit configured to generate one of the output audio signals of the output channel count by adding, at a predetermined ratio, one of the expansion signals of the output channel count and the input audio signal.
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Specification