JP2000078700A5

JP2000078700A5 -

Info

Publication number: JP2000078700A5
Application number: JP1998243729A
Authority: JP
Filing date: 1998-08-28
Publication date: 2005-09-08
Anticipated expiration: 2018-08-28

Description

請求項２に記載したオーディオ再生方法によると、請求項１に記載した発明において、仮想音像信号の生成は、仮想音源位置からオーディオ信号を放音した場合の聴取者の耳元までの音響伝達関数を使用して生成させることで、仮想位置に音源を配置することが簡単な処理で良好に行える。 According to the audio reproducing method according to claim 2, in the invention of claim 1, the virtual sound signal generation of the acoustic transfer function at the listener's ears or in the case of sound emission of the audio signal from the virtual sound source position By generating using, it is possible to place the sound source in a virtual position with a simple process.

請求項４に記載したオーディオ再生方法によると、請求項３に記載した発明において、仮想音像信号の生成は、仮想音源の位置からオーディオ信号を放音した場合の聴取者の耳元までの音響伝達関数を使用して生成させ、仮想音源の位置として、左リアチャンネル及び右リアチャンネルのスピーカが本来配置される位置を含む複数の位置に設定したことで、フロントの２チャンネルのスピーカだけを使用して、聴取者を囲む良好な音場再現ができる。 According to the audio reproducing method according to claim 4, in the invention described in claim 3, the generation of virtual sound signals, sound transmission in the ear or the listener in the case where the sound of the audio signal from the position of the virtual sound source By using a function to generate it and setting the virtual sound source position to multiple positions including the position where the left rear channel and right rear channel speakers are originally placed, only the front two channel speakers are used. Therefore, a good sound field can be reproduced that surrounds the listener.

請求項７に記載したオーディオ信号処理装置によると、請求項６に記載した発明において、仮想音像処理部での仮想音像信号の生成は、仮想音源の位置からオーディオ信号を放音した場合の聴取者の耳元までの音響伝達関数を使用して生成させたことで、仮想位置に音源を配置することが簡単な構成で良好に行える。 According to the audio signal processing apparatus according to claim 7, in the invention according to claim 6, the generation of the virtual sound image signal in the virtual sound image processing unit is performed by the listener when the audio signal is emitted from the position of the virtual sound source. ear or by were generated using an acoustic transfer function, the better performed with a simple structure is possible to arrange the sound source to the virtual position.

請求項９に記載したオーディオ信号処理装置によると、請求項８に記載した発明において、仮想音像処理部での仮想音像信号の生成は、所定位置からオーディオ信号を放音した場合の聴取者の耳元までの音響伝達関数を使用して生成させ、仮想音源の位置として、左リアチャンネル及び右リアチャンネルのスピーカが本来配置される位置を含む複数の位置に設定したことで、フロントの２チャンネルのスピーカだけを使用して、聴取者を囲む良好な音場再現ができるオーディオ信号処理が行える。 According to the audio signal processing device according to claim 9, in the invention according to claim 8, the virtual sound image processing unit generates the virtual sound image signal at the listener's ear when the audio signal is emitted from a predetermined position. or it is generated using an acoustic transfer function, as the position of the virtual sound source, by setting a plurality of positions including a position rear left channel and a rear right channel speaker is placed originally in the two-channel front Using only speakers, audio signal processing that can reproduce a good sound field surrounding the listener can be performed.

Claims

In an audio reproduction method for emitting an audio signal composed of at least four channels of a left channel, a right channel, a left rear channel, and a right rear channel from a speaker for each channel,
Based on the four-channel audio signal, a predetermined reverberation signal is generated, the generated reverberation signal is added to the audio signal of each channel, and sound is emitted from the speaker for each channel.
A virtual sound image having a sound image at a predetermined position different from the actual speaker position that outputs the audio signal of each channel based on at least the left rear channel and the right rear channel of the four channels of the audio signals of the four channels. An audio reproduction method for generating a signal, mixing the generated virtual sound image signal with the audio signal of the left rear channel and the right rear channel, and emitting sound from a speaker for each channel.

The audio playback method according to claim 1, wherein
Generating the virtual sound signal, an audio reproducing method of producing using the acoustic transfer functions at the ear or the listener in the case where the sound of the audio signal from the predetermined position.

In an audio playback method of emitting an audio signal composed of at least four channels of a left channel, a right channel, a left rear channel, and a right rear channel from a left channel speaker and a right channel speaker,
A predetermined reverberation signal is generated based on the four-channel audio signal, and the generated reverberation signal is added to the audio signal of each channel.
A virtual sound image signal having a sound image at a predetermined position is generated based on at least the two left-channel audio signals of the left rear channel and the right rear channel among the four-channel audio signals to which the reverberation signal is added, and the generated virtual image signal is generated. An audio reproduction method of mixing a sound image signal with left and right channel audio signals to which the reverberation signal is added, and emitting the mixed left and right channel audio signals from the speakers for the respective channels. .

The audio reproduction method according to claim 3, wherein
Generating the virtual sound signal may be generated using acoustic transfer functions at the ear or the listener in the case where the sound of the audio signal from the predetermined position,
An audio reproduction method in which the predetermined position is set to a plurality of positions including a position where left rear channel and right rear channel speakers are originally arranged.

The audio reproduction method according to claim 3, wherein
In addition to the virtual sound image signal based on the audio signals of the left rear channel and the right rear channel to which the reverberation signal is added, the virtual sound image signal is generated based on the audio signal to which the reverberation signal is not added, An audio reproduction method of mixing the virtual sound image signal of the left and right channel audio signals to which the reverberation signal is added.

An input unit for obtaining an audio signal composed of at least four channels of a left channel, a right channel, a left rear channel, and a right rear channel;
A reverberation processing unit that generates a predetermined reverberation signal based on the 4-channel audio signal obtained from the input unit;
Based on at least the left rear channel and right rear channel two-channel audio signals of the four-channel audio signals obtained at the input unit, the position is different from the actual speaker position for outputting the respective channel audio signals. A virtual sound image processing unit for generating a virtual sound image signal having a sound image;
The reverberation signal generated by the reverberation processing unit is added to the 4-channel audio signal, and the virtual sound image signal generated by the virtual sound image processing unit is mixed with the left rear channel and right rear channel audio signals. And an output unit that outputs the audio signal for the speaker of each channel.

The audio signal processing device according to claim 6.
The virtual sound image processing unit of the virtual sound signal in generating the audio signal processing apparatus were generated using an acoustic transfer function at the ear or the listener in the case where the sound of the audio signal from the predetermined position.

An input unit for obtaining an audio signal composed of at least four channels of a left channel, a right channel, a left rear channel, and a right rear channel;
A reverberation processing unit that generates a predetermined reverberation signal based on the 4-channel audio signal obtained from the input unit, and adds the reverberation signal to the audio signal of each channel;
A virtual sound image signal having a sound image at a predetermined position is generated based on at least the two left-channel audio signals of the left rear channel and the right rear channel among the four-channel audio signals to which the reverberation signal is added by the reverberation processing unit, A virtual sound image processing unit that mixes the generated virtual sound image signal with the left channel and right channel audio signals to which the reverberation signal is added by the reverberation processing unit;
An audio signal processing apparatus comprising: an output unit that outputs left channel and right channel audio signals mixed with virtual sound image signals in the virtual sound image processing unit as audio signals for speakers of the respective channels.

The audio signal processing apparatus according to claim 8, wherein
Generation of virtual sound signals at the virtual sound image processing unit causes generated using an acoustic transfer function at the listener's ears or in the case of sound emission of the audio signal from the predetermined position,
An audio signal processing apparatus in which the predetermined position is set to a plurality of positions including a position where left rear channel and right rear channel speakers are originally arranged.

The audio signal processing apparatus according to claim 8, wherein
In addition to the virtual sound image signal based on the two-channel audio signals of the left rear channel and the right rear channel to which the reverberation signal is added, the virtual sound image processing unit performs virtual based on the audio signal to which the reverberation signal is not added. An audio signal processing apparatus that performs a process of generating a sound image signal and mixing each virtual sound image signal with an audio signal of a left channel and a right channel to which the reverberation signal is added.