Audio signal processing device, speaker device, video display device, and control method

• US 8,380,332 B2
• Filed: 08/19/2009
• Issued: 02/19/2013
• Est. Priority Date: 08/26/2008
• Status: Active Grant

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Suzuki, Masato
• Primary Examiner(s): Flanders, Andrew C
• Application Number:
  US12/543,886
• Publication Number:
  US 20100057233A1
• Time in Patent Office: 1,280 Days
• Field of Search: 700/94, 381/77, 381/104, 381/107, 455/3.06, 369 1- 12, 704500-504, 713/03, 713/04
• US Class Current: 700/94
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In an audio signal processing device, an acquisition unit acquires an audio signal. A signal processing unit applies predetermined signal processing to the audio signal acquired by the acquisition unit when the signal processing unit is supplied with power, and outputs the audio signal. A communication unit establishes wireless communication with a communication device for connection to the communication device. A communication controller controls the communication unit to commence the connection to the communication device by the wireless communication when a predetermined connection condition is satisfied, and to sever the connection to the communication device when a predetermined disconnection condition is satisfied. A power control unit starts supply of power to the signal processing unit when the connection to the communication device is commenced, and stops the supply of power to the signal processing unit when the connection to the communication device is severed.

Claims

1. An audio signal processing device comprising:

an acquisition unit that acquires an audio signal which is wirelessly received from a communication device, the acquisition unit further receiving a control signal together with the audio signal from the communication device, the control signal indicating parameters for signal processing of the audio signal;

a signal processing unit that includes an amplifier for amplifying the audio signal and applies the signal processing to the audio signal acquired by the acquisition unit according to the parameters indicated by the control signal when the signal processing unit is supplied with power, and that outputs the audio signal for generation of sound;

a communication unit that establishes wireless communication with a communication device for connection to the communication device;

a communication controller that controls the communication unit to commence the connection to the communication device by the wireless communication when a predetermined connection condition is satisfied, and to sever the connection to the communication device when a predetermined disconnection condition is satisfied; and

a power control unit that starts supply of power to the signal processing unit for generation of sound when the connection to the communication device is commenced, and that stops the supply of power to the signal processing unit when the connection to the communication device is severed.

2. The audio signal processing device according to claim 1, wherein

the communication unit includes a detection unit that detects an intensity of a radio field propagated from the communication device, and

the communication controller determines whether the predetermined connection condition is satisfied or not according to the intensity of the radio field detected by the detection unit.

3. The audio signal processing device according to claim 1, wherein

the communication unit includes a detection unit that detects an intensity of a radio field propagated from the communication device, and

the communication controller determines whether the predetermined disconnection condition is satisfied or not according to the intensity of the radio field detected by the detection unit.

4. The audio signal processing device according to claim 1, wherein

the communication unit transmits a request signal to the communication device, and receives a response signal to the request signal from the communication device, and

the communication controller determines whether the predetermined connection condition is satisfied or not according to the response signal received by the communication unit.

5. The audio signal processing device according to claim 1, wherein

the power control unit starts supply of power to the signal processing unit when the power control unit additionally receives a predetermined signal from the communication device after the connection is commenced.

6. An audio signal processing device comprising:

an acquisition unit that acquires an audio signal which is wirelessly received from a communication device, the acquisition unit further receiving a control signal together with the audio signal from the communication device, the control signal indicating parameters for signal processing of the audio signal;

a signal processing unit that includes an amplifier for amplifying the audio signal and applies the signal processing to the audio signal acquired by the acquisition unit according to the parameters indicated by the control signal when the signal processing unit is supplied with power, and that outputs the audio signal for generation of sound;

a communication unit that searches a communication device present in a communication range after power is supplied to the communication unit, and that establishes wireless communication for connection to the communication device which is searched by the communication unit;

a communication controller that controls the communication unit to commence the connection to the communication device by the wireless communication when a predetermined connection condition is satisfied, and that severs the connection to the communication device when a predetermined disconnection condition is satisfied; and

a power control unit that holds a first power-supply state where the communication unit is supplied with power and the signal processing unit is not supplied with power before the connection by the wireless communication to the communication device is commenced, that switches the first power-supply state to a second power-supply state where the communication unit is supplied with power and the signal processing unit is supplied with power for generation of sound when the connection to the communication device is commenced, and that restores the first power supply state where the communication unit is supplied with power and the signal processing unit is not supplied with power when the connection to the communication device is severed.

7. The audio signal processing device according to claim 6, wherein

the communication unit includes a detection unit that detects an intensity of a radio field propagated from the communication device, and

the communication controller determines whether the predetermined connection condition is satisfied or not according to the intensity of the radio field detected by the detection unit.

8. The audio signal processing device according to claim 6, wherein

the communication unit includes a detection unit that detects an intensity of a radio field propagated from the communication device, and

the communication controller determines whether the predetermined disconnection condition is satisfied or not according to the intensity of the radio field detected by the detection unit.

9. The audio signal processing device according to claim 6, wherein

the communication unit transmits a request signal to the communication device, and receives a response signal to the request signal from the communication device, and

the communication controller determines whether the predetermined connection condition is satisfied or not according to the response signal received by the communication unit.

10. The audio signal processing device according to claim 6, wherein

the power control unit starts supply of power to the signal processing unit when the power control unit additionally receives a predetermined signal from the communication device after the connection is commenced.

11. A speaker device comprising:

an acquisition unit that acquires an audio signal which is wirelessly received from a communication device, the acquisition unit further receiving a control signal together with the audio signal from the communication device, the control signal indicating parameters for signal processing of the audio signal;

a signal processing unit that includes an amplifier for amplifying the audio signal and applies the signal processing to the audio signal acquired by the acquisition unit according to the parameters indicated by the control signal when the signal processing unit is supplied with power, and that outputs the audio signal for generation of sound;

a sound generator that generates sound according to the audio signal outputted from the signal processing unit;

a communication unit that establishes wireless communication with a communication device for connection to the communication device;

a communication controller that controls the communication unit to commence the connection to the communication device by the wireless communication when a predetermined connection condition is satisfied, and to sever the connection to the communication device when a predetermined disconnection condition is satisfied; and

a power control unit that starts supply of power to the signal processing unit for generation of sound when the connection to the communication device is commenced, and that stops the supply of power to the signal processing unit when the connection to the communication device is severed.

12. A video display device comprising:

an acquisition unit that acquires an audio signal and a video signal which are wirelessly received from a communication device, the acquisition unit further receiving a control signal together with the audio signal from the communication device, the control signal indicating parameters for signal processing of the audio signal;

a signal processing unit that includes an amplifier for amplifying the audio signal and applies the signal processing to the audio signal acquired by the acquisition unit according to the parameters indicated by the control signal when the signal processing unit is supplied with power, and that outputs the audio signal for generation of sound;

a sound generator that generates sound according to the audio signal outputted from the signal processing unit;

a display unit that has a display screen and that displays image on the display screen according to the video signal acquired by the acquisition unit when the display unit is supplied with power;

a communication unit that establishes wireless communication with a communication device for connection to the communication device;

a communication controller that controls the communication unit to commence the connection to the communication device by the wireless communication when a predetermined connection condition is satisfied, and to sever the connection to the communication device when a predetermined disconnection condition is satisfied; and

a power control unit that starts supply of power to the signal processing unit for generation of sound and the display unit when the connection to the communication device is commenced, and that stops the supply of power to the signal processing unit and the display unit when the connection to the communication device is severed.

13. A control method for use in an audio signal processing device, which includes an acquisition unit for acquiring an audio signal which is wirelessly received from a communication device, the acquisition unit further receiving a control signal together with the audio signal from the communication device, the control signal indicating parameters for signal processing of the audio signal, a signal processing unit for applying the signal processing to the audio signal acquired by the acquisition unit according to the parameters indicated by the control signal after power is supplied and outputting the audio signal for generation sound, the signal processing unit including an amplifier for amplifying the audio signal, and a communication unit for establishing wireless communication for connection to the communication device, the control method comprising:

a connection-start control step for controlling the communication unit to commence the connection to the communication device by the wireless communication when a predetermined connection condition is satisfied;

a power-supply start control step for starting supply of power to the signal processing unit for generation of sound when the connection to the communication device is commenced;

a connection-severing control step for controlling the communication unit to server the connection to the communication device when a predetermined disconnection condition is satisfied; and

a power-supply stop control step for stopping supply of power to the signal processing unit when the connection to the communication device is severed.

14. A control method for use in an audio signal processing device, which includes an acquisition unit for acquiring an audio signal, which is wirelessly received from a communication device, the acquisition unit further receiving a control signal together with the audio signal from the communication device, the control signal indicating parameters for signal processing of the audio signal, a signal processing unit for applying the signal processing to the audio signal acquired by the acquisition unit according to the parameters indicated by the control signal after power is supplied and outputting the audio signal for generation sound, the signal processing unit including an amplifier for amplifying the audio signal, and a communication unit for searching the communication device present in a communication range after power is supplied and establishing wireless communication for connection to the communication device which is searched, the control method comprising:

a first power-supply control step for holding a first power-supply state where the communication device is supplied with power and the signal processing unit is not supplied with power before the connection to the communication device is commenced;

a connection-commencing control step for controlling the communication unit to commence the connection to the communication device by the wireless communication when a predetermined connection condition is satisfied;

a power-supply control step for switching the first power-supply state to a second power-supply state where the communication device is supplied with power and the signal processing unit is supplied with power for generation of sound when the connection to the communication unit is commenced;

a connection-severing control step for controlling the communication unit to sever the connection to the communication device when a predetermined disconnection condition is satisfied; and

a power-supply stop control step for restoring the first power-supply state where the communication device is supplied with power and the signal processing unit is not supplied with power when the connection to the communication device is severed.