Speaker driving device

• US 10,687,141 B2
• Filed: 10/10/2018
• Issued: 06/16/2020
• Est. Priority Date: 04/12/2016
• Status: Active Grant

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Trigence Semiconductor, Inc.
• Inventors: Yasuda, Akira, Okamura, Jun-ichi, Iwamura, Hiroshi
• Primary Examiner(s): Lee, Ping
• Application Number:
  US16/156,653
• Publication Number:
  US 20190058946A1
• Time in Patent Office: 615 Days
• CPC Class Codes: G06F 3/162 Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
• CPC Class Codes: G06F 3/165 Management of the audio stream, e.g. setting of volume, audio stream path
• CPC Class Codes: H03G 3/3005 in amplifiers suitable for low-frequencies, e.g. audio amplifiers H03G3/32, H03G3/34 take precedence
• CPC Class Codes: H03G 5/025 Equalizers; Volume or gain control in limited frequency bands
• CPC Class Codes: H03G 5/165 Equalizers; Volume or gain control in limited frequency bands
• CPC Class Codes: H04R 1/2819 for loudspeaker transducers
• CPC Class Codes: H04R 29/001 for loudspeakers H04R29/007 takes precedence
• CPC Class Codes: H04R 3/04 for correcting frequency response

Abstract

A speaker driving device including a setting part setting at least one parameter defining an equivalent circuit of a first speaker unit as a first parameter; a first calculator configured to change a first frequency response based on the first parameter, the changed first frequency response being applied to an input signal; and a driving signal generator configured to generate a drive signal for driving a speaker unit based on a first calculation signal, the first calculation signal being obtained by applying the changed first frequency response to the input signal.

Claims

1. A speaker drive device comprising:

a first calculator configured to calculate information related to a position of a diaphragm of a first speaker unit by a first electromechanical model calculation using a first parameter defining an equivalent circuit of the first speaker unit and an input signal, and outputting a first calculation signal corresponding to the calculated information; and

a driving signal generator configured to generate a drive signal for driving an output speaker unit,

wherein

the driving signal generator includes a second calculator,

the second calculator calculates information related to a position of a diaphragm of a second speaker unit by a second electromechanical model calculation using a second parameter defining an equivalent circuit of the second speaker unit and the drive signal before supplying the drive signal to the output speaker unit and outputting a second calculation signal corresponding to the calculated information,

the driving signal generator generates the drive signal based on the first calculation signal and the second calculation signal,

the speaker drive device further comprises a user interface provider configured to provide a first interface for specifying the second parameter set in the second calculator, and

the user interface provider is configured to provide a second interface for specifying correction information for correcting a process in the second calculator, and the second calculator corrects the second parameter based on the correction information.

2. The speaker drive device according to claim 1, further comprising:

a signal recording part configured to correlate and record information for specifying the second speaker unit with the drive signal in a recording device.

3. The speaker drive device according to claim 2, wherein

the signal recording part correlates and records information for specifying the first speaker unit with the drive signal in the recording device.

4. The speaker drive device according to claim 1, wherein

the first electromechanical model calculation is the same as the second electromechanical model calculation.

5. The speaker drive device according to claim 1, wherein the user interface provider is configured to provide a third interface for specifying the first parameter set in the first calculator.

6. The speaker drive device according to claim 1, further comprising:

a specifying part configured to acquire information related to the second speaker unit from a memory to specify the second parameter based on the information, the output speaker unit being arranged with the memory.

7. The speaker drive device according to claim 1, wherein

the drive signal generator includes an output part, the output part performs adjustment of a dynamic range of the drive signal to be generated to output the drive signal to the output speaker unit.

8. The speaker drive device according to claim 1, further comprising:

an output part configured to transmit the drive signal via a network.