CIRCUIT AND PROGRAM FOR PROCESSING MULTICHANNEL AUDIO SIGNALS AND APPARATUS FOR REPRODUCING SAME
First Claim
1. A circuit for processing two-channel stereo audio signals, comprising:
- a first addition device that adds stereo audio signals of two channels comprising a right channel and a left channel, to generate an added signal;
a frequency characteristics correction device that corrects frequency characteristics of the added signal generated by the addition device, in accordance with correction characteristics determined based on a head related transfer function to generate a corrected audio signal;
a second addition device that adds the corrected audio signal generated by the frequency characteristic correction device to each of the audio signal of the right channel and the audio signal of the left channel to generate output signals as a right channel output audio signal and a left channel output audio signal; and
an output device that outputs the output audio signals as the right channel output audio signal and the left channel output audio signal.
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Accused Products
Abstract
A circuit for processing multichannel audio signals, comprises a frequency characteristics correction device and an output device. The frequency characteristics correction device corrects frequency characteristics of an audio signal of a channel including an audio signal component having a predetermined frequency band, of audio signals of a multichannel comprising at least a right channel and a left channel, in accordance with correction characteristics determined based on a head related transfer function. The output device mixes the audio signal component having the frequency characteristics corrected with an audio signal of the right channel and an audio signal of the left channel to generate mixed output audio signals, and outputting the mixed output audio signals as a right channel output audio signal and a left channel output audio signal.
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Citations
5 Claims
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1. A circuit for processing two-channel stereo audio signals, comprising:
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a first addition device that adds stereo audio signals of two channels comprising a right channel and a left channel, to generate an added signal; a frequency characteristics correction device that corrects frequency characteristics of the added signal generated by the addition device, in accordance with correction characteristics determined based on a head related transfer function to generate a corrected audio signal; a second addition device that adds the corrected audio signal generated by the frequency characteristic correction device to each of the audio signal of the right channel and the audio signal of the left channel to generate output signals as a right channel output audio signal and a left channel output audio signal; and an output device that outputs the output audio signals as the right channel output audio signal and the left channel output audio signal. - View Dependent Claims (2, 3)
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4. An apparatus for reproducing two-channel audio signals, comprising:
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a decoder that decodes input audio stream data to generate audio signals of two channels; and a circuit that processes the two-channel audio signals, said circuit comprising (i) a first addition device that adds stereo audio signals of two channels comprising a right channel and a left channel, to generate an added signal;
(ii) a frequency characteristics correction device that corrects frequency characteristics of the added signal generated by the addition device, in accordance with correction characteristics determined based on a head related transfer function to generate a corrected audio signal;
(iii) a second addition device that adds the corrected audio signal generated by the frequency characteristic correction device to each of the audio signal of the right channel and the audio signal of the left channel to generate output signals as a right channel output audio signal and a left channel output audio signal; and
(iv) an output device that outputs the output audio signals as the right channel output audio signal and the left channel output audio signal.
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5. A program for reproducing two-channel stereo audio signals, which is to be executed by a computer, to cause the computer to function as:
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a first addition device that adds stereo audio signals of two channels comprising a right channel and a left channel, to generate an added signal; a frequency characteristics correction device that corrects frequency characteristics of the added signal generated by the addition device, in accordance with correction characteristics determined based on a head related transfer function to generate a corrected audio signal; a second addition device that adds the corrected audio signal generated by the frequency characteristic correction device to each of the audio signal of the right channel and the audio signal of the left channel to generate output signals as a right channel output audio signal and a left channel output audio signal; and an output device that outputs the output audio signals as the right channel output audio signal and the left channel output audio signal.
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Specification