Onkyo Corporation

Norio Etoh

Tadaharu Sunaga

Susumu Koaze

Junichi Kobayashi

Yataro Yajima

Shintaro Jo

Ayako Nakatani

Yohei Koike

Mamoru Sekiya

Norimasa Kitagawa

Shogo Sugihara

Masanori Shigematsu

Hinako Misaki

Toshifumi Okamura

Tsuyoshi Morohashi

In an audio processing apparatus of the present invention, one or two audio signals selected from a surround rear left audio signal, a left outer audio signal and a left upper audio signal is (are) amplified to be outputted from a speaker terminal(s) corresponding to this (these) channel(s) without necessity to provide amplifiers of all channels. When the surround rear left audio signal is included, a switch Sis turned ON to supply the surround rear left audio signal amplified by an amplifierto a SP terminal. When the left outer audio signal is included, a switchis turned ON to supply the left outer audio signal amplified by the amplifierto a SP terminal, or a switchis turned ON to supply the left outer audio signal amplified by an amplifierto the SP terminal. When the left upper audio signal is included, a switchis turned ON to supply the left upper audio signal amplified by the amplifierto a SP terminal

Audio processing apparatus

An amplification apparatus comprises: an amplifier circuit that amplifies an input audio signal and outputs an output audio signal; a first signal level determining unit that determines whether or not a signal level of the output audio signal outputted from the amplifier circuit is lower than a silence determination reference value; and a power-supply control unit that shifts the amplification apparatus from a power-on state to a power-off state, when it is determined that the signal level of the output audio signal outputted from the amplifier circuit is lower than the silence determination reference value.

Amplification apparatus

A switching section causes the first amplification section to amplify the expansion left audio signal and supply the amplified expansion left audio signal to the first speaker terminal and causing the second amplification section to amplify the expansion right audio signal and supply the amplified expansion right audio signal to the second speaker terminal when the Bi-Amp function is not used. The switching section causes the first amplification section to amplify the left audio signal for Bi-Amp and supply the amplified left audio signal for Bi-Amp the first speaker terminal and causing the second amplification section to amplify the right audio signal for Bi-Amp and supply the amplified right audio signal for Bi-Amp to the second speaker terminal when the Bi-Amp function is used.

In a multichannel amplifier according to the present invention, in a case where a headphone is not connected to a headphone output terminal, a switch IC and first to third switches are on/off controlled by a control unit so that an audio signal path for outputting a front channel signal FL/FR to a front speaker and extending from a first input terminalto a front speaker output terminalvia a buffer circuit, a switch IC, a first volume control unit, a buffer circuit, and a first amplifying unitis not electrically connected to another audio signal path.

Multichannel amplifier

A volume control apparatus comprises signal processing section for performing digital signal processing and a scaling process on an audio signal outputted from a sound source; level adjusting section for amplifying or attenuating a level of the audio signal outputted from the signal processing section, by an amount of adjustment determined based on an instructed amount of change, and outputting the amplified or attenuated audio signal to an outside; storage section for storing a level value of the audio signal outputted to the outside and the amount of adjustment for the audio signal adjusted by the level adjusting section; detecting section for detecting, when a volume controller is controlled by a user, time required for an amount of operation to reach a predetermined value; first setting section for setting an amount of operational change based on the level value stored in the storage section and the detected time; second setting section for setting an allowable amount of change by which the level adjusting section can make an adjustment by an attenuation process, based on the amount of adjustment stored in the storage section; determining section for determining one of the amount of operational change and the allowable amount of change that has a smaller value to be the instructed amount of change; and instructing section for instructing the level adjusting section to adjust the level of the audio signal based on the determined instructed amount of change.

Volume control apparatus and volume control program

An audio processing apparatus comprising: channel determination section for determining which one of a combination of the first left audio signal and the first right audio signal and a combination of the second left audio signal and the second right audio signal is included in multichannel audio data; and switching section for causing the first amplification section to amplify the first left audio signal and supply the amplified first left audio signal to the first speaker terminal and causing the second amplification section to amplify the first right audio signal and supply the amplified first right audio signal to the second speaker terminal when the combination of the first left audio signal and the first right audio signal is determined to be included; and causing the first amplification section to amplify the second left audio signal and supply the amplified second left audio signal to the third speaker terminal and causing the second amplification section to amplify the second right audio signal and supply the amplified second right audio signal to the fourth speaker terminal when the combination of the second left audio signal and the second right audio signal is determined to be included.

The present invention provides a vibration-damping structure for an audio apparatus, accommodating a main transformer, which becomes a vibration source when driven, the vibration-damping structure including: a main chassis to which a signal processing board for processing an audio signal is attached, the first chassis defining a portion of an outer shape of an assembly of the vibration-damping structure; a sub-chassis fastened to an inner surface of the main chassis so as to be partially in contact with the inner surface of the main chassis via a plurality of fastening members; and a component accommodating chassis fastened to an inner surface of the sub-chassis so as to be partially in contact with the inner surface of the sub-chassis via other fastening members, wherein the main transformer is fixed to the component accommodating chassis.

Growing community of inventors

Neyagawa, Japan

Norio Etoh