JP4940634B2 - Audio system - Google Patents

Description

  The present invention is an audio which transmits sound signals and outputs sound to at least a front left speaker, a front right speaker, a front center speaker, a subwoofer speaker, a rear left speaker, and a rear right speaker. About the system.

  In recent years, DVDs (digital versatile discs), which are optical discs capable of recording a large amount of information such as movies, have become widespread, and information is reproduced from such DVDs by a DVD player or the like. When a home theater is configured by combining such a DVD player and an audio system, an acoustic effect close to that of watching a movie or concert in a movie theater or theater can be obtained.

  Conventionally, in an audio system, for example, as a front left speaker disposed on the front left side with respect to the position of the viewer so that 5.1-channel audio by Dolby Digital or DTS (Digital Theater System) can be reproduced. FL (front left) speakers, FR (front right) speakers as front right speakers arranged at the front right side, CEN (center) speakers as front center speakers arranged at the front center, any SW (subwoofer) speaker arranged at the position, SL (surround left) speaker as the rear left speaker arranged at the left rear side, and SR (surround light) as the rear right speaker arranged at the rear right side A speaker is provided.

For example, in the prior art of Patent Document 1, in order to realize 5.1 channel sound in a listening room, a DVD player that reproduces video / audio information recorded on a DVD in the front center of the viewer, A display device such as a TV that displays the playback video output of the DVD player and displays a video, and a center speaker (front center speaker) that outputs the playback audio output of the DVD player are arranged. Also, a front left speaker (front left speaker) and a front right speaker (front right speaker) are arranged on the front left and right of the viewer, and a rear left speaker (rear left speaker) and A rear right speaker (back right speaker) is disposed, and a subwoofer speaker (subwoofer speaker) is disposed at an arbitrary position. In such a conventional technology, 5.1-channel audio output is realized by such a speaker arrangement.
Noto 3072057 JP 2005-65288 A JP-A-2005-236404 JP 2001-275194 A JP 2002-16563 A Japanese Utility Model Publication No. 6-38338

  By the way, in the prior art of Patent Document 1, a center speaker device including a center speaker, a front left speaker device including a front left speaker, and a front right speaker device including a front right speaker are connected to a DVD player with a cord (signal cable). However, the rear left speaker device including the rear left speaker and the rear right speaker device including the rear right speaker are not directly connected to the DVD player, and the audio signal is wirelessly transmitted by radio waves from the DVD player. And the rear right speaker device.

  In a DVD player, an audio signal is transmitted wirelessly to the rear left speaker device and the rear right speaker device. Therefore, an audio signal for the rear left speaker device and the rear right speaker device of the audio output circuit is modulated and transmitted wirelessly. Is provided. On the other hand, the rear left speaker device and the rear right speaker device are provided with a demodulation circuit for demodulating the modulated audio signal wirelessly transmitted from the DVD player.

  However, in this prior art, since the rear left speaker device and the rear right speaker device are configured separately, a receiving unit including a circuit that receives and demodulates an audio signal transmitted wirelessly from a DVD player is provided. Since each of them is required individually and a speaker box must be provided individually, the cost tends to increase accordingly. In general, when configuring a home theater, an AV (Audio Visual) receiver including an equalizer or the like is generally connected between the DVD player and each speaker device in order to enhance sound effects. Since the technology does not disclose an AV receiver, the sound effect is inferior to an audio system including an AV receiver. In this prior art, a DVD player is provided with a transmitter for transmitting the rear left speaker corresponding audio signal and the rear right speaker corresponding audio signal on radio waves. The circuit becomes complicated and the cost of the DVD player itself increases.

  The prior art of Patent Document 2 is to transmit data from at least one master to one or more slaves (speaker devices) arranged at various spatial positions and configured to receive data almost simultaneously. The modulated wave to be transmitted is a network-conscious data such as a representative signal, auxiliary data, and management data. However, this conventional technique is applied to the rear left speaker and the rear right speaker among the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker. However, it is not configured to transmit a voice signal wirelessly only.

  In the prior art of Patent Document 3, in the 5.1 channel surround system, four speakers are arranged on the front side of the viewer, two speakers are arranged on the rear side, and each rear unit from the system body to each rear side is arranged. Audio signals are transmitted to the speakers by radio waves, but each rear speaker is configured separately, so it receives audio signals sent wirelessly from the speaker system body with a built-in center speaker. Therefore, each receiving unit including a circuit for demodulating is required individually, and a speaker box must be provided individually.

  In the prior art of Patent Document 4, a data string is transmitted from an information transmitting device to a speaker device with a receiving function by a wireless method. However, since this wireless method uses infrared rays, the infrared rays are blocked by a shielding object. May not reach the speaker device with a reception function. Therefore, in this prior art, it is always necessary to take care not to place a shielding object between the information transmitting device and the speaker device with a receiving function. In addition, since the speaker device corresponding to the rear left speaker device and the speaker device corresponding to the rear right speaker device are configured separately, the audio signal transmitted wirelessly from the information transmitting device is received. Thus, each receiving unit including a circuit for demodulating is individually required, and a speaker box must also be provided individually, which tends to increase the cost.

  In the prior art of Patent Document 5, a left front speaker module, a right front speaker module, a left surround speaker module, a right surround speaker module, a central speaker module, and a subwoofer module are arranged and transmitted wirelessly from a digital audio encoder / transmitter. The audio system is configured to output sound based on the audio signal that has been generated. The left front speaker module (front left speaker device), the right front speaker module (front right speaker device), the center speaker module (front center) Speaker device), subwoofer module (subwoofer speaker device), left surround speaker module (back left speaker device), and right surround speaker module (back right speaker device). Wound speaker module (rear left speaker apparatus) and the right surround speaker module (rear right speaker apparatus) not configured to transmit audio signals wirelessly for only. Also, since the left surround speaker module (the back left speaker device) and the right surround speaker module (the back right speaker device) are configured separately, the audio signal transmitted wirelessly from the information transmitting device Since each receiving unit including a circuit for receiving and demodulating the signal is required individually and a speaker box must be provided individually, the cost tends to increase accordingly.

  In the prior art of Patent Document 6, the audio signal of the other side channel is wirelessly transmitted via the low frequency amplifier, the FM modulator, and the transmission unit in the one side speaker. , Front left speaker, front right speaker, front center speaker, subwoofer speaker, rear left speaker, rear right speaker, only for the rear left speaker and rear right speaker Is not configured to transmit.

  The present invention has been made to solve the above-described problems, and is configured to transmit a back left speaker-compatible audio signal and a back right speaker-compatible audio signal on radio waves from a subwoofer speaker device, It is another object of the present invention to provide an audio system configured by modularizing a rear left speaker and a rear right speaker.

In order to achieve the above object, the invention of claim 1 provides at least a front left speaker, a front right speaker, a front center speaker, a subwoofer speaker, a rear left speaker, and a rear right speaker. In an audio system that transmits audio signals and outputs audio,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding audio signal, a front right speaker corresponding audio signal, a front center speaker corresponding audio signal, and a subwoofer speaker corresponding audio signal from the sound generation device; A subwoofer speaker device having a modularized transmission unit that converts the back left speaker-compatible audio signal and the back right speaker-compatible audio signal into a digital audio signal, further AAFS-modulates and transmits it as a radio wave;
A modularized receiving unit that receives radio waves from the subwoofer speaker device, demodulates the AAFS signal, extracts a digital audio signal, and converts it into an analog audio signal; and amplifies the analog audio signal from the receiving unit and There is provided an audio system comprising: a rear speaker device including a speaker and a rear speaker sound amplifying circuit applied to a rear right speaker.

In this configuration, the audio generation device includes a radio tuner and a selection output unit that selects and outputs an audio signal input from an externally connected playback device or an audio signal input from the radio tuner. Based on the audio signal output from the selection output unit , an audio signal indicating an audio pattern and volume set by a user operation is generated in correspondence with each speaker. In the subwoofer speaker device, the sound amplifier circuit amplifies the front left speaker corresponding sound signal, the front right speaker corresponding sound signal, the front center speaker corresponding sound signal, and the subwoofer speaker corresponding sound signal from the sound generating device. The subwoofer speaker outputs a woofer sound by the amplified sound signal corresponding to the subwoofer speaker. In addition, the transmitting unit in the subwoofer speaker device converts the back left speaker corresponding sound signal and the back right speaker corresponding sound signal into a digital sound signal, further AAFS-modulates and transmits as a radio wave. In the rear speaker device, the receiving unit receives the radio wave from the subwoofer speaker device, demodulates AAFS, extracts the digital audio signal, further converts it into an analog audio signal, and the rear speaker audio amplifying circuit receives from the receiving unit. The analog audio signal is amplified and applied to the rear left speaker and the rear right speaker. As a result, the back left audio is output from the back left speaker, and the back right audio is output from the back right speaker.

  According to this configuration, since the subwoofer speaker device can be arranged at an arbitrary position, the subwoofer speaker device can be arranged so that the radio wave from the subwoofer speaker device can reach the rear speaker device sufficiently. Since the transmission unit is modularized, the circuit board of the transmission unit can be small, and can be provided in an empty space in the subwoofer speaker device. In addition, the modularization of the receiving unit allows the circuit board of the receiving unit to be small and can be provided in an empty space of the subwoofer speaker device, and the receiving unit can output two audio signals. It is possible to store two speakers (a rear left speaker and a rear right speaker) in one rear speaker device. Further, since the audio signal is transmitted by AAFS modulation, it is less affected by external noise, and the sound quality can be improved.

The invention of claim 2 transmits sound signals to at least the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker to transmit audio. In the output audio system,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding audio signal, a front right speaker corresponding audio signal, a front center speaker corresponding audio signal, and a subwoofer speaker corresponding audio signal from the sound generation device; A subwoofer speaker device,
A modularized transmission unit provided in the subwoofer speaker device, which converts the back left speaker compatible audio signal and the back right speaker compatible audio signal into a digital audio signal, further AAFS modulates and transmits as a radio wave;
A left-side speaker and a right-side speaker configured as a module; a modular receiving unit that receives radio waves from the transmitting unit, demodulates AAFS, extracts a digital audio signal, and converts the digital audio signal; Provided is an audio system comprising a rear speaker device having a rear speaker audio amplifying circuit that amplifies an analog audio signal from the receiving unit and applies the amplified signal to a rear left speaker and a rear right speaker. .

In this configuration, the audio generation device includes a radio tuner and a selection output unit that selects and outputs an audio signal input from an externally connected playback device or an audio signal input from the radio tuner. Based on the audio signal output from the selection output unit , an audio signal indicating an audio pattern and volume set by a user operation is generated in correspondence with each speaker. In the subwoofer speaker device, the sound amplifier circuit amplifies the front left speaker corresponding sound signal, the front right speaker corresponding sound signal, the front center speaker corresponding sound signal, and the subwoofer speaker corresponding sound signal from the sound generating device. The subwoofer speaker outputs a woofer sound by the amplified sound signal corresponding to the subwoofer speaker. Also, the transmission unit provided in the subwoofer speaker device converts the back left speaker corresponding sound signal and the back right speaker corresponding sound signal into a digital sound signal, further AAFS-modulates and transmits as a radio wave. In the rear speaker device, the receiving unit receives radio waves from the subwoofer speaker device, AAFS-demodulates and extracts a digital audio signal, further converts it to an analog audio signal, and the rear speaker audio amplifying circuit receives the signal from the receiving unit. The analog audio signal is amplified and applied to the rear left speaker and the rear right speaker. As a result, the back left audio is output from the back left speaker, and the back right audio is output from the back right speaker.

  According to this configuration, since the subwoofer speaker device can be arranged at an arbitrary position, the subwoofer speaker device can be arranged so that the radio wave from the subwoofer speaker device can reach the rear speaker device sufficiently. Since the transmission unit is modularized, the circuit board of the transmission unit can be small, and can be provided in an empty space in the subwoofer speaker device. Further, the modularization of the receiving unit allows the circuit board of the receiving unit to be small and can be provided in an empty space of the subwoofer speaker device. In addition, since the audio signal is transmitted by AAFS modulation, it is less affected by external noise, and the sound quality can be improved.

  Further, according to this configuration, since the receiving unit can output two audio signals, two speakers (the rear left speaker and the rear right speaker) are accommodated in one rear speaker device. As a result, it is not necessary to provide two rear speaker devices as in the conventional case, so that only one speaker box is required, and the cost can be reduced accordingly. In addition, if there are two rear speaker devices as in the prior art, an extra room space is required, but if there is only one rear speaker device, the space for placement is small, and the room space is effectively utilized. You can also

The invention of claim 3 transmits audio signals to at least the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker to transmit the audio. In the output audio system,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding audio signal, a front right speaker corresponding audio signal, a front center speaker corresponding audio signal, and a subwoofer speaker corresponding audio signal from the audio generator; A subwoofer speaker device having a transmitting unit that modulates the rear left speaker corresponding audio signal and the rear right speaker corresponding audio signal and transmits the modulated signal as a radio wave;
A receiving unit that receives radio waves from the subwoofer speaker device and demodulates it into an original audio signal, and a rear speaker audio amplifying circuit that amplifies the audio signal from the receiving unit and applies the amplified signal to the rear left speaker and the rear right speaker And an audio system including the rear speaker device.

In this configuration, the audio generation device includes a radio tuner and a selection output unit that selects and outputs an audio signal input from an externally connected playback device or an audio signal input from the radio tuner. Based on the audio signal output from the selection output unit , an audio signal indicating an audio pattern and volume set by a user operation is generated in association with each speaker. In the subwoofer speaker device, the sound amplifier circuit amplifies the front left speaker corresponding sound signal, the front right speaker corresponding sound signal, the front center speaker corresponding sound signal, and the subwoofer speaker corresponding sound signal from the sound generating device. The subwoofer speaker outputs a woofer sound by the amplified sound signal corresponding to the subwoofer speaker. In addition, the transmission unit in the subwoofer speaker device modulates and transmits the rear left speaker corresponding audio signal and the rear right speaker corresponding audio signal as radio waves. In the rear speaker device, the receiving unit receives the radio wave from the subwoofer speaker device, demodulates and extracts the original audio signal, and the rear speaker audio amplifying circuit amplifies the audio signal from the receiving unit to This is applied to the left speaker and the rear right speaker. As a result, the back left audio is output from the back left speaker, and the back right audio is output from the back right speaker.

  According to this configuration, since the subwoofer speaker device can be arranged at an arbitrary position, the subwoofer speaker device can be arranged so that radio waves can sufficiently reach the rear speaker device from the subwoofer speaker device. In addition, since the receiving unit can output two audio signals, it is possible to store two speakers in one rear speaker device.

The invention according to claim 4 transmits audio signals to at least the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker to transmit audio. In the output audio system,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding sound signal, a front right speaker corresponding sound signal, a front center speaker corresponding sound signal, and a subwoofer speaker corresponding sound signal from the sound generator; A subwoofer speaker device,
A transmitter that is provided in a predetermined device and that modulates the rear left speaker corresponding audio signal and the rear right speaker corresponding audio signal and transmits the modulated signal as a radio wave;
Rear left speaker and rear right speaker configured as a module, a receiving unit that receives radio waves from the transmitting unit and demodulates the original audio signal, and amplifies the audio signal from the receiving unit There is provided an audio system comprising: a rear speaker device having a rear speaker audio amplifying circuit applied to a rear speaker and a rear right speaker.

In this configuration, the audio generation device includes a radio tuner and a selection output unit that selects and outputs an audio signal input from an externally connected playback device or an audio signal input from the radio tuner. Based on the audio signal output from the selection output unit , an audio signal indicating an audio pattern and volume set by a user operation is generated in correspondence with each speaker. In the subwoofer speaker device, the sound amplifier circuit amplifies the front left speaker corresponding sound signal, the front right speaker corresponding sound signal, the front center speaker corresponding sound signal, and the subwoofer speaker corresponding sound signal from the sound generating device. The subwoofer speaker outputs a woofer sound by the amplified sound signal corresponding to the subwoofer speaker. Further, the transmission unit provided in the subwoofer speaker device modulates and transmits the rear left speaker corresponding audio signal and the rear right speaker corresponding audio signal as radio waves. In the rear speaker device, the receiving unit receives the radio wave from the subwoofer speaker device, demodulates and extracts the original audio signal, and the rear speaker audio amplifying circuit amplifies the analog audio signal from the receiving unit. This is applied to the rear left speaker and the rear right speaker. As a result, the back left audio is output from the back left speaker, and the back right audio is output from the back right speaker.

  According to this configuration, since the subwoofer speaker device can be arranged at an arbitrary position, the subwoofer speaker device can be arranged so that radio waves can sufficiently reach the rear speaker device from the subwoofer speaker device. In addition, since the receiving unit can output two audio signals, it is possible to store two speakers in one rear speaker device. As a rear speaker device, there are two rear speakers. There is no need to provide a speaker device, so that only one speaker box is required, and the cost can be reduced accordingly. In addition, if there are two rear speaker devices as in the prior art, an extra room space is required, but if there is only one rear speaker device, the space for placement is small, and the room space is effectively utilized. You can also.

  According to a fifth aspect of the invention, in the third or fourth aspect of the invention, the transmitter converts the back left speaker-compatible audio signal and the back right speaker-compatible audio signal into a digital audio signal, and further performs spread spectrum modulation. The reception unit is a circuit that receives a radio wave from a subwoofer speaker device or a predetermined device, performs spread spectrum demodulation, extracts a digital audio signal, and converts it into an analog audio signal. The receiving unit can accurately reproduce the back left speaker corresponding audio signal and the back right speaker corresponding audio signal in the transmitting unit, and obtain a sound with good sound quality.

  In the invention of claim 6, since the transmitter and the receiver are modularized in claim 3, claim 4 or claim 5, the circuit board of the transmitter and the circuit board of the receiver can be small. The transmitting unit can be provided in an empty space in the subwoofer speaker device. The receiving unit can be provided in an empty space of the rear speaker device.

  In the invention of claim 7, in the invention of claim 5, since AAFS modulation is used as the spectrum extension modulation and AAFS demodulation is used as the spectrum extension demodulation, it is possible to receive from the transmission unit without being affected by external noise. The signal can be wirelessly transmitted to the unit.

  In the invention of claim 8, in the invention of claim 4, since the predetermined device is a subwoofer speaker device, the subwoofer speaker device can be disposed at an arbitrary position, and a radio wave is transmitted from the subwoofer speaker device to a rear speaker. The subwoofer speaker device can be arranged to reach the device sufficiently.

As described above, according to the present invention, an audio signal is transmitted to at least the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker. In the audio system for outputting sound, a radio tuner and a selection output unit for selecting and outputting a sound signal input from an externally connected playback device or a sound signal input from the radio tuner are provided. An audio generation device that generates an audio signal indicating an audio pattern and volume set by a user operation based on an audio signal output from the selection output unit in association with each speaker; and a subwoofer speaker; , The front left speaker compatible audio signal and the front right speaker compatible audio signal from the audio generation device. And an audio amplifier circuit for amplifying the audio signal for the front center speaker and the audio signal for the subwoofer speaker, and converting the audio signal for the rear left speaker and the audio signal for the rear right speaker into a digital audio signal and further performing AAFS modulation. And a subwoofer speaker device having a modularized transmission unit for transmitting as a radio wave, further receiving a radio wave from the subwoofer speaker device, AAFS demodulating, taking out a digital audio signal, and further converting it to an analog audio signal A rear speaker device having a modular receiving unit and a rear speaker audio amplifying circuit that amplifies an analog audio signal from the receiving unit and applies the amplified signal to the rear left speaker and the rear right speaker is configured.

  Therefore, since the subwoofer speaker device can be arranged at any position, the subwoofer speaker device can be arranged so that radio waves from the subwoofer speaker device can reach the rear speaker device sufficiently, and the transmitter is modularized. Therefore, the circuit board of the transmission unit can be small and can be provided in a vacant space in the subwoofer speaker device. In addition, the modularization of the receiving unit allows the circuit board of the receiving unit to be small and can be provided in an empty space of the subwoofer speaker device, and the receiving unit can output two audio signals. Two speakers can be accommodated in one rear speaker device. In addition, since AAFS modulation and AAFS demodulation are performed, the signal from the transmission unit is less affected by external noise, and the sound quality of the sound output of the speaker of the rear speaker device can be improved.

Further, according to the present invention, an audio signal is transmitted to at least the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker to transmit audio. An audio system that outputs a radio tuner, and a selection output unit that selects and outputs an audio signal input from an externally connected playback device or an audio signal input from the radio tuner, and Based on an audio signal output from the selection output unit, an audio generation device that generates an audio signal indicating an audio pattern and volume set by a user operation in association with each speaker, and a subwoofer speaker; Front left speaker audio signal and front right speaker audio signal from the audio generator and front A subwoofer speaker device having an audio signal for the center speaker and an audio amplifier circuit for amplifying the audio signal for the subwoofer speaker is provided. A modularized transmission unit that converts a corresponding audio signal into a digital audio signal, further AAFS modulates and transmits the signal as a radio wave, and further includes a rear left speaker and a rear right speaker configured as a module, and the transmission unit A modularized receiving unit that receives radio waves from AAFS, demodulates and extracts a digital audio signal and converts it to an analog audio signal, and amplifies the analog audio signal from the receiving unit to a rear left speaker and a rear right side An audio amplifier circuit for a rear speaker applied to the speaker It was configured with a Asupika device.

  Therefore, since the subwoofer speaker device can be arranged at an arbitrary position, the subwoofer speaker device can be arranged so that the radio wave from the subwoofer speaker device can reach the rear speaker device sufficiently, and the transmitter is a module. Therefore, the circuit board of the transmission unit can be small and can be provided in an empty space in the subwoofer speaker device. Further, since AAFS modulation and AAFS demodulation are performed, the signal from the transmission unit is less affected by external noise, and the sound quality of the sound output of the speaker of the rear speaker device can be improved.

  In addition, since the receiving unit can output two audio signals, it is possible to store two speakers in one rear speaker device. As a rear speaker device, there are two rear speakers. There is no need to provide a speaker device, so that only one speaker box is required, and the cost can be reduced accordingly. In addition, if there are two rear speaker devices as in the prior art, an extra room space is required, but if there is only one rear speaker device, the space for placement is small, and the room space is effectively utilized. You can also

Further, according to the present invention, an audio signal is transmitted to at least the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker to transmit audio. An audio system that outputs a radio tuner, and a selection output unit that selects and outputs an audio signal input from an externally connected playback device or an audio signal input from the radio tuner, and Based on an audio signal output from the selection output unit, an audio generation device that generates an audio signal indicating an audio pattern and volume set by a user operation in association with each speaker, and a subwoofer speaker; Front left speaker audio signal and front right speaker audio signal from the audio generator and front An audio amplifier circuit for amplifying the audio signal for the center speaker and the audio signal for the subwoofer; and a transmitter for modulating the audio signal for the back left speaker and the audio signal for the back right speaker and transmitting them as radio waves A subwoofer speaker device; a receiving unit that receives radio waves from the subwoofer speaker device and demodulates the original audio signal; and amplifies the audio signal from the receiving unit to a rear left speaker and a rear right speaker A rear speaker device having a rear speaker sound amplifying circuit applied to the speaker is provided.

  Therefore, since the subwoofer speaker device can be arranged at an arbitrary position, the subwoofer speaker device can be arranged so that radio waves from the subwoofer speaker device can reach the rear speaker device sufficiently. In addition, since the receiving unit can output two audio signals, it is possible to store two speakers in one rear speaker device.

Further, according to the present invention, an audio signal is transmitted to at least the front left speaker, the front right speaker, the front center speaker, the subwoofer speaker, the rear left speaker, and the rear right speaker to transmit audio. An audio system that outputs a radio tuner, and a selection output unit that selects and outputs an audio signal input from an externally connected playback device or an audio signal input from the radio tuner, and An audio generation device that generates an audio signal indicating an audio pattern and volume set by a user operation based on an audio signal output from the selection output unit corresponding to each of the speakers, a subwoofer speaker, and the audio Front left speaker audio signal and front right speaker audio signal from the generator and front A subwoofer speaker device having an audio signal for the center speaker and an audio amplifier circuit for amplifying the audio signal for the subwoofer speaker, and further provided with a rear left speaker audio signal and a rear right speaker provided in a predetermined device. Provided with a transmitter that modulates the corresponding audio signal and transmits it as a radio wave, and also includes a rear left speaker and a rear right speaker configured as a module, and receives the radio wave from the transmitter and demodulates it to the original audio signal A rear speaker device including a receiving unit and a rear speaker audio amplifying circuit that amplifies an audio signal from the receiving unit and applies the amplified signal to the rear left speaker and the rear right speaker is configured.

  Therefore, since the subwoofer speaker device can be arranged at an arbitrary position, the subwoofer speaker device can be arranged so that radio waves from the subwoofer speaker device can reach the rear speaker device sufficiently. In addition, since the receiving unit can output two audio signals, it is possible to store two speakers in one rear speaker device. As a rear speaker device, there are two rear speakers. There is no need to provide a speaker device, so that only one speaker box is required, and the cost can be reduced accordingly. In addition, if there are two rear speaker devices as in the prior art, an extra room space is required, but if there is only one rear speaker device, the space for placement is small, and the room space is effectively utilized. You can also

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a circuit block diagram showing the configuration of a DVD player connected to an audio system according to an embodiment of the present invention.

  The DVD player A includes a disk mechanical unit 1, a microprocessor 2, a SEL (selector) 3, DACs (digital / analog converters) 4, 5, 6, 7, LPF (low pass filter) 8, and a video amplifier. 9 is provided.

  The disk mechanical unit 1 rotates a loaded DVD or CD, reads a recording signal from the DVD or CD by an optical pickup (not shown), and outputs the recorded signal. The microprocessor 2 has functions of an OSD (on-screen display) controller, an AV decoder, and a front-end controller. The microprocessor 2 decodes a recording signal from the disk mechanical unit 1 to reproduce a video signal and an audio signal, The signal is supplied to the SEL (selector) 3 and the DACs (digital / analog converters) 5, 6, 7, and the video signal is supplied to the video amplifier 9.

  Further, the microprocessor 2 operates the DVD player A by a DVD / RADIO signal input from the microprocessor 20 of the AV receiver B (see FIG. 2) via the line L8, or operates a radio tuner (not shown). . When the DVD / RADIO signal indicates DVD, the main power source of the DVD player is turned on and the main power source of the radio is turned off. When RADIO is indicated, the main power source of the DVD player is turned off and the main power source of the radio is turned off. Turn on.

  Further, the microprocessor 2 outputs a mode (mode) signal to the microprocessor 20 of the AV receiver B via the line L9, and switches the audio mode (Dolby Digital, DTS, etc.) of the AV receiver B. The mode (mode) signal is a signal that is a source for displaying the state of the voice mode. Further, the microprocessor 2 switches the input of the SEL (selector) 3 to the input line side to the DAC 7 in response to the surround (surround) signal input from the microprocessor 20 of the AV receiver B via the line L7. Set.

  The DACs (Digital / Analog Converters) 4, 5, 6, and 7 convert the 2ch (channel) audio signal output from the microprocessor 2 by PCM (Pulse Code Modulation) into a 2ch analog audio signal. The LPF 8 cuts the demodulation noise of the 2ch audio signal from the DAC 7 and outputs the 2ch audio signal as an ML (monitor left) audio signal and an MR (monitor right) audio signal. To the left and right speakers (not shown) in the TV monitor K. The video amplifier 9 amplifies the video signals (Y / Pb / Pr signal and Video signal) from the microprocessor 2 and outputs them as the Y / Pb / Pr signal and Video signal to the TV monitor K.

  FIG. 2 is a circuit block diagram showing the configuration of an AV (audio / visual) receiver as an audio generation device included in the audio system of this embodiment. This AV receiver is called an AV receiver in the sense that it receives an audio signal from an AV device such as a DVD player.

  In FIG. 2, the AV receiver B includes an LPF 10, an amplifier circuit 11a, an analog switch 11, an LED 12, an equalizer 13, an input selector & pseudo surround circuit 14, an electronic volume 19, a microprocessor 20, a remote control reception control circuit 21, an LCD driver 22, An LCD display lamp 23, an EEPROM 24, a radio tuner 25, and a volume switch 26 are provided.

  The LPF 10 inputs audio signals of 2ch from the DACs 4, 5 and 6 of the DVD player A (see FIG. 1) via the lines L1 to L6, and cuts the demodulation noise in the DACs 4, 5 and 6 Each 2ch audio signal is output. The FL sound signal (front left speaker-compatible sound signal) and FR sound signal (front right speaker-compatible sound signal) output from the LPF 10 are input to the analog switch 11, and the SL sound signal (rear surface) output from the LPF 10 is output. The left speaker compatible audio signal), the SR audio signal (back right speaker compatible audio signal), the CEN audio signal (front center speaker compatible audio signal), and the SW audio signal (subwoofer speaker compatible audio signal) are 6ch. Input to the switch 17.

  The analog switch 11 switches the signal sequence when the operation of the tuner 25 and the DVD player A is switched. That is, the analog switch 11 receives a signal from the amplifier circuit 11a (L audio signal and R audio signal from the tuner 25) and a signal from the LPF 10 (FL audio) according to a control signal from the microprocessor 20 (signal on the line L8). Signal and FR audio signal) are selected and output. The equalizer 13 equalizes the LR sequence audio signal with a preset audio pattern in accordance with a control signal from the microprocessor 20 received by the control I / F (interface) 13a, and inputs the LR sequence audio signal by this equalization. Input to the selector & pseudo surround circuit 14.

  The LED 12 displays the output level for each frequency band divided into a plurality of audio signals equalized by the equalizer 13. The audio pattern of the equalizer 13 includes music for flat / normal, rock, pop, classical, jazz, bass booster (BB), etc., and these equalizing information is preset in the equalizer 13 in advance. The equalizing operation is controlled by switching the equalizing information by a control signal from the microprocessor 20.

  The FL audio signal and the FR audio signal output from the equalizer 13 are input to the input selector & pseudo surround circuit 14. The input selector & pseudo surround circuit 14 is a selector 15 for switching the system of input signals, a 6ch simulator & audio selector 16 for outputting an audio signal for giving a 6ch pseudo surround effect to an audio signal input by 2ch, an input 6ch switch 17 for switching the audio signal system (switching the 2ch or 6ch input audio signal), and the simulated 6ch control signal to the 6ch simulator & audio selector 16 and the 2ch / 6ch switching control signal to the 6ch switch 17 An I2CBus interface 18 provided from the processor 20 is provided, and an audio signal that produces a pseudo surround effect is generated.

  The electronic volume 19 performs volume adjustment by inputting a volume adjustment signal from the microprocessor 20 (for example, a 6ch volume control signal for volume adjustment in the range of 0 to 79 dB) from the I2CBus interface 19a. The electronic volume 19 outputs an FL audio signal, an FR audio signal, an SL audio signal, an SR audio signal, a CEN audio signal, and a SW audio signal, and these audio signals are sent to the subwoofer speaker device C shown in FIG. It is done.

  As described above, the microprocessor 20 controls the input selector & pseudo-surround circuit 14, the electronic volume 19, the LCD driver 22, the EEPROM 24, and the tuner 25 by communicating with each other via the I2C bus (I2CBus) L. In addition, the analog switch 11 and the equalizer 13 are controlled by performing communication through ordinary ports. A serial comb signal output from the microprocessor 20 is a signal given to the LCD driver 22 serially, and is a signal for displaying mode information and operation information on the LCD display 23. The LCD driver 22 receives a display signal serially from the microprocessor 20 and displays the mode state and operation information on the LCD display tube 23. Further, when the audio signal received by the tuner 25 is stereo, the microprocessor 20 inputs a stereo identification signal from the tuner 25 and performs processing corresponding to stereo audio.

  The remote control reception control circuit 21 receives an infrared operation signal from a remote controller (remote controller) (not shown), converts it into an electrical operation signal, and transmits the operation signal to the microprocessor 20. The EEPROM 24 stores programs and statuses necessary for the operation of the microprocessor 20. When an operation for setting the operation mode of the AV receiver B to the radio mode is performed by a remote controller (not shown), the remote control reception control circuit 21 that has received the tuner selection operation signal from the remote controller selects the tuner for the microprocessor 20. The operation signal is given, and thereby the microprocessor 20 operates the tuner 25 and outputs the L sound signal and the R sound signal from the tuner 25. At this time, the analog switch 11 is switched so as to select the L audio signal and the R audio signal from the tuner 25.

  When the AV receiver B having such a configuration is set to the DVD mode, the audio signal of 6ch from the DVD player A is input via the lines L1 to L6, and is set by the operation of each component described above. 6-channel audio signals (FL audio signal, FR audio signal, SL audio signal, SR audio signal, CEN audio signal, SW audio signal) are output. Further, when the AV receiver B is set to the radio mode, the 2ch audio signal from the tuner 25 is converted into a 6ch audio signal (FL audio signal, FR audio signal, SL audio signal, SR audio signal, CEN audio signal, SW Audio signal).

  FIG. 3 is a circuit block diagram showing the configuration of the subwoofer speaker device and the rear speaker device included in the audio system of this embodiment.

  In FIG. 3, the subwoofer speaker apparatus C amplifies the FL audio signal and the FR audio signal from the SW speaker H and the AV receiver B (see FIG. 2), and supplies them to the FL speaker E and the FR speaker F, respectively. An audio signal amplifier 27, an audio signal amplifier 28 that amplifies the CEN audio signal and the SW audio signal from the AV receiver B (see FIG. 2) and supplies them to the CEN speaker G and the SW speaker H, respectively, and an SL audio signal And the SR audio signal is modulated by an AAFS (Advanced Adaptive Frequency Selection) method, which is a type of spread spectrum method that modulates an ISM band frequency signal having a frequency of 2.45 GHz and a bandwidth of 26 MHz. And a modularized transmission unit 29 that wirelessly transmits to the speaker device D. Although the audio signal amplifier 27 and the audio signal amplifier 28 are shown separately, these amplifiers 27 and 28 are made into one chip and form four audio signal amplifiers. In addition, the components in the subwoofer speaker device C are housed in one housing.

  The rear speaker device D includes a modularized receiving unit 30 that receives the radio wave transmitted from the transmitting unit 29 of the subwoofer speaker device C by the antenna a2 and demodulates the audio signal modulated by the AAFS method using the AAFS method. The two audio signal amplifiers 31 for amplifying the audio signal from the receiving unit 30 and the SL speaker (the left speaker for the rear surround) I which inputs the Lch audio signal from the audio signal amplifier 31 and converts it into audio. And an SR speaker (Rear-side surround right speaker) J for inputting the Rch audio signal from the audio signal amplifier 31 and converting it into audio.

  FIG. 4 is a block diagram showing a basic configuration of the transmission unit in FIG. In FIG. 4, a transmission unit 29 converts an analog SL audio signal and SR audio signal input from the AV receiver B (see FIG. 2) into a digital SL audio signal and SR audio signal 29a. Then, the digital SL audio signal and the SR audio signal from the A / D conversion circuit 29a are respectively compressed to, for example, 1: 4, and modulated to, for example, a 2.45 GHz band signal (in this case, according to the AAFS method in which the spectrum is spread) A spread spectrum modulation processing circuit 29b that performs modulation), an amplification circuit 29c that amplifies the SL modulated voice signal and SR modulated voice signal from the spread spectrum modulation processing circuit 29b, and an SL modulated voice signal and SR from the amplification circuit 29c. A transmission circuit 29d that amplifies the modulated audio signal and transmits it as a radio wave from the antenna a1. ing. These circuits are modularized, and a transmission board on which the circuit of the transmission unit 29 is mounted is attached to the subwoofer speaker device C.

  FIG. 5 is a block diagram showing a basic configuration of the receiving unit in FIG. In FIG. 5, a receiving unit 30 receives a SL modulated audio signal and an SR modulated audio signal transmitted from the transmitting unit 29, and an SL modulated audio signal and an SR modulated audio signal received by the receiving circuit 30a. And the SL-modulated audio signal and SR-modulated audio signal from the amplifier circuit 30b are expanded to 4: 1, for example, and demodulated by the AAFC method to obtain the digital SL audio signal and SR audio signal. A spread spectrum demodulation processing circuit 30c for outputting, and a D / A conversion circuit 30d for converting the digital SL audio signal and SR audio signal from the spread spectrum demodulation processing circuit 30c into analog SL audio signals and SR audio signals. ing. These circuits are modularized, and a receiving board on which the circuit of the receiving unit 30 is mounted is attached to the rear speaker device D.

  As a feature of this embodiment, the transmission unit 29 includes an A / D conversion circuit 29a, a spread spectrum modulation processing circuit 29b, an amplification circuit 29c, and a transmission circuit 29d, is modularized, and is provided in the subwoofer speaker device C. An SL modulated audio signal and an SR modulated audio signal are transmitted from the subwoofer speaker device C to the rear speaker device D by radio waves. Since the subwoofer speaker device C can arrange the subwoofer speaker device at an arbitrary position, the subwoofer speaker device C can be arranged so that the radio wave can sufficiently reach the rear speaker device D from the subwoofer speaker device C. Further, since the transmission unit 29 is modularized, the circuit board of the transmission unit 29 may be small, and can be provided in an empty space in the subwoofer speaker device C.

  In this embodiment, the transmission unit 29 is provided in the subwoofer speaker device C. However, although the transmission unit 29 can be provided in the DVD player A and the AV receiver B, the internal part of the DVD player A and the AV receiver B can be provided. In addition, the DVD player A and AV receiver B cannot be arranged at any place so that the radio wave from the transmission unit 29 can reach the rear speaker device D efficiently. 29 may be preferably provided in the subwoofer speaker device C.

  As a feature of the present embodiment, the receiving unit 30 includes a receiving circuit 30a, an amplifier circuit 30b, a spread spectrum demodulation processing circuit 30c, and a D / A conversion circuit 30d, is modularized, and is provided in the rear speaker device D. An SL modulated audio signal and an SR modulated audio signal transmitted from the subwoofer speaker device C by radio waves are received. Therefore, the modularization of the receiving unit 30 can be provided in an empty space of the rear speaker device D, and the receiving unit 30 can output two audio signals, so that one rear speaker device D can be output. Two speakers (SL speaker and SR speaker) can be accommodated in the interior, and there is no need to provide two rear speaker devices as in the prior art as a rear speaker device, so that one speaker box is also provided. That's it, and you can cut costs accordingly. In addition, if there are two rear speaker devices as in the conventional case, the room space is also increased, but if there is only one rear speaker device as in the present embodiment, less space is required, Space can be used effectively.

  FIG. 6 is an arrangement diagram showing an example of a state in which the DVD player and the audio system are arranged indoors in the embodiment.

  In FIG. 6, 60 indicates a room in which a DVD player and an audio system are arranged, and 61 indicates a viewer. In the room 60, the DVD player A, the CEN speaker H, and the TV monitor K are arranged in the center of the front as viewed from the viewer 61, and the AV receiver B is placed on the left side of the DVD player A in the vicinity of the center of the front. And a subwoofer speaker device C including a subwoofer speaker G is arranged on the right side. Further, the FL speaker E is arranged on the left side of the front surface, and the FR speaker F is arranged on the right side of the front surface. Further, a rear speaker device D including an SL speaker I and an SR speaker J is disposed behind the viewer 61.

  The audio output terminal for the AV receiver of the DVD player A is connected to the audio input terminal of the AV receiver B via a predetermined audio cable. The video output terminal of the DVD player A is connected to the video input terminal of the TV monitor K via a predetermined video cable. The TV audio output terminal of the DVD player A is connected to the audio input terminal of the TV monitor K via a predetermined audio cable. The audio output terminal of the AV receiver B is connected to the audio input terminal of the subwoofer speaker device C via a predetermined audio cable. The audio output terminals of the subwoofer speaker device C are connected to the FL speaker E and the FR speaker F via predetermined audio cables, respectively. Note that the subwoofer speaker device C can be arranged at an arbitrary location.

  As described above, by arranging the FL speaker E, the FR speaker F, the subwoofer speaker G, the CEN speaker H, the SL speaker I, and the SR speaker J in the room 60, 5.1ch A home theater can be realized.

1 is a circuit block diagram showing a configuration of a DVD player connected to an audio system according to an embodiment of the present invention. It is a circuit block diagram which shows the structure of AV receiver as an audio | voice production | generation apparatus contained in the audio system of the said embodiment. It is a circuit block diagram which shows the structure of the subwoofer speaker apparatus and rear speaker apparatus which are contained in the audio system of the said embodiment. It is a block diagram which shows the structure of the transmission part in the subwoofer speaker apparatus contained in the audio system of the said embodiment. It is a block diagram which shows the structure of the receiving part in the rear speaker apparatus contained in the audio system of the said embodiment. FIG. 2 is a layout diagram illustrating an example of a state in which a DVD player and an audio system are disposed indoors in the embodiment.

Explanation of symbols

A DVD player (playback device)
B AV receiver (voice generator)
C Subwoofer speaker device D Rear speaker device E FL speaker (front left speaker)
F FR speaker (front right speaker)
G CEN speaker (front center speaker)
H SW speaker (subwoofer speaker)
Speaker for I SL
J SR speaker (Right-side speaker)
25 Tuner 27, 28 Audio signal amplifier (Audio amplification circuit)
29 Transmitter 30 Receiver 31 Audio Signal Amplifier (Rear Speaker Audio Amplifier)

Claims (8)

In an audio system that transmits audio signals to at least the front left speaker, front right speaker, front center speaker, subwoofer speaker, rear left speaker, and rear right speaker to output sound,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding audio signal, a front right speaker corresponding audio signal, a front center speaker corresponding audio signal, and a subwoofer speaker corresponding audio signal from the sound generation device; A subwoofer speaker device having a modularized transmission unit that converts the back left speaker-compatible audio signal and the back right speaker-compatible audio signal into a digital audio signal, further AAFS-modulates and transmits it as a radio wave;
A modularized receiving unit that receives radio waves from the subwoofer speaker device, demodulates the AAFS signal, extracts a digital audio signal, and converts it into an analog audio signal; and amplifies the analog audio signal from the receiving unit and An audio system comprising: a rear speaker device having a speaker and a rear speaker audio amplifying circuit applied to the rear right speaker. In an audio system that transmits audio signals to at least the front left speaker, front right speaker, front center speaker, subwoofer speaker, rear left speaker, and rear right speaker to output sound,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding audio signal, a front right speaker corresponding audio signal, a front center speaker corresponding audio signal, and a subwoofer speaker corresponding audio signal from the sound generation device; A subwoofer speaker device,
A modularized transmission unit provided in the subwoofer speaker device, which converts the back left speaker compatible audio signal and the back right speaker compatible audio signal into a digital audio signal, further AAFS modulates and transmits as a radio wave;
A left-side speaker and a right-side speaker configured as a module; a modular receiving unit that receives radio waves from the transmitting unit, demodulates AAFS, extracts a digital audio signal, and converts the digital audio signal; An audio system comprising: a rear speaker device including a rear speaker audio amplifier circuit that amplifies an analog audio signal from the receiving unit and applies the amplified signal to a rear left speaker and a rear right speaker. In an audio system that transmits audio signals to at least the front left speaker, front right speaker, front center speaker, subwoofer speaker, rear left speaker, and rear right speaker to output sound,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding audio signal, a front right speaker corresponding audio signal, a front center speaker corresponding audio signal, and a subwoofer speaker corresponding audio signal from the audio generator; A subwoofer speaker device having a transmitting unit that modulates the rear left speaker corresponding audio signal and the rear right speaker corresponding audio signal and transmits the modulated signal as a radio wave;
A receiving unit that receives radio waves from the subwoofer speaker device and demodulates it into an original audio signal, and a rear speaker audio amplifying circuit that amplifies the audio signal from the receiving unit and applies the amplified signal to the rear left speaker and the rear right speaker An audio system comprising: a rear speaker device comprising: In an audio system that transmits audio signals to at least the front left speaker, front right speaker, front center speaker, subwoofer speaker, rear left speaker, and rear right speaker to output sound,
A radio tuner and a selection output unit that selects and outputs a front left speaker-compatible audio signal and a front right speaker-compatible audio signal input from an externally connected playback device or an audio signal input from the radio tuner; And generating a sound signal indicating a sound pattern and a sound volume set by a user operation corresponding to each speaker based on the sound signal output from the selection output unit ,
A 6ch simulator that converts the 2ch audio signal output by the selection output unit into a 6ch audio signal and outputs the 6ch audio signal;
Front left speaker corresponding audio signal and front right speaker corresponding audio signal output from the selection output unit, rear left speaker corresponding audio signal and rear right speaker corresponding audio input from the externally connected playback device And a 6ch switch for switching and outputting a 6ch audio signal composed of a signal, an audio signal for the front center speaker and an audio signal for the subwoofer speaker, and a 6ch audio signal output from the 6ch simulator. ,
A sound generation device that outputs a 6-ch sound signal, which is a sound signal indicating a sound pattern and volume set by the user operation, to the outside based on the output of the 6-ch switch;
A subwoofer speaker, a front left speaker corresponding sound signal, a front right speaker corresponding sound signal, a front center speaker corresponding sound signal, and a subwoofer speaker corresponding sound signal from the sound generator; A subwoofer speaker device,
A transmitter that is provided in a predetermined device and that modulates the rear left speaker corresponding audio signal and the rear right speaker corresponding audio signal and transmits the modulated signal as a radio wave;
Rear left speaker and rear right speaker configured as a module, a receiving unit that receives radio waves from the transmitting unit and demodulates the original audio signal, and amplifies the audio signal from the receiving unit An audio system comprising: a rear speaker device having a rear speaker audio amplifying circuit applied to the rear speaker and the rear right speaker.   The transmitting unit is a circuit that converts the back left speaker-compatible audio signal and the back right speaker-compatible audio signal into a digital audio signal, further spread spectrum modulates and transmits the signal as a radio wave, and the receiving unit includes a subwoofer speaker device. 5. The audio system according to claim 3, wherein the audio system is a circuit that receives radio waves from a predetermined device, performs spread spectrum demodulation, extracts a digital audio signal, and converts the digital audio signal into an analog audio signal.   6. The audio system according to claim 3, 4 or 5, wherein the transmitter and the receiver are modularized.   6. The audio system according to claim 5, wherein AAFS modulation is used as the spectrum extension modulation, and AAFS demodulation is used as the spectrum extension demodulation.   The audio system according to claim 4, wherein the predetermined device is a subwoofer speaker device.

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