Recording device and adjustment method of recording device

• US 20070147632A1
• Filed: 06/05/2006
• Published: 06/28/2007
• Est. Priority Date: 06/06/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Gyotoku, Kaoru
• Granted Patent: US 7,907,741 B2
• Time in Patent Office: Days
• US Class Current: 381/91
• CPC Class Codes: H04N 5/9202 the additional signal being a sound signal H04N5/9155, H04N5/92 take precedence
• CPC Class Codes: H04N 9/8211 the additional signal being a sound signal H04N9/835 takes precedence
• CPC Class Codes: H04R 29/006 Microphone matching
• CPC Class Codes: H04R 3/005 for combining the signals of two or more microphones specially adapted for hearing aids H04R25/407
• CPC Class Codes: H04R 3/04 for correcting frequency response

Abstract

A recording device obtains audio signals by plural microphones and records the audio signals on a recording medium. The device includes plural incorporated microphones for obtaining the audio signals; correction circuits for changing characteristics by correction parameters for the incorporated microphones, for correcting characteristics of the audio signals obtained by the incorporated microphones to a reference characteristic, and for outputting the corrected audio signals; and a recording device for recording the corrected audio signals output from the circuits on the recording medium. When an audio signal obtained by an external microphone is input to the correction circuits and recorded on the recording medium instead of all the audio signals or a part of the audio signals obtained by the plural incorporated microphones, the characteristic of a corresponding correction circuit is set by a correction parameter for the external microphone, the parameter is obtained from the external microphone, the audio signal obtained by the external microphone is corrected to the reference characteristic to produce a different corrected audio signal, and the different corrected audio signal is output.

Claims

1. A recording device for recording audio signals on a recording medium, the recording device comprising:

a plurality of incorporated microphones for obtaining the audio signals;

correction circuits configured to change characteristics by correction parameters for the incorporated microphones, to correct characteristics of the audio signals obtained by the incorporated microphones to a reference characteristic, and to output the corrected audio signals; and

a recording unit configured to record the corrected audio signals output from the correction circuits on the recording medium;

wherein when an audio signal obtained by an external microphone is input to the correction circuits and recorded on the recording medium in place of all the audio signals or a part of the audio signals obtained by the plurality of incorporated microphones, the characteristic of a corresponding correction circuit is set by a correction parameter for the external microphone, the correction parameter being obtained from the external microphone, the audio signal obtained by the external microphone is corrected to the reference characteristic to produce a different corrected audio signal, and the different corrected audio signal is output.

2. The recording device as claimed in claim 1, wherein the correction circuit obtains the correction parameter for the external microphone by a voltage value.

3. The recording device as claimed in claim 1, wherein the correction circuit obtains the correction parameter for the external microphone from a memory provided in the external microphone.

4. The recording device as claimed in claim 1, further comprising:

an image pickup unit configured to output a result of image pickup; and

an image analyzing unit configured to analyze the result of image pickup to detect the correction parameter for the external microphone, the correction parameter being recorded as an image on the external microphone.

5. The recording device as claimed in claim 1, wherein the correction parameter is recorded in the external microphone, the recording device further comprising:

a radio communication unit configured to obtain the correction parameter for the external microphone by data communication with a radio communication unit provided in the external microphone.

6. An adjustment method of a recording device for recording the audio signals on a recording medium, the adjustment method comprising:

changing characteristics by correction parameters for incorporated microphones, and correcting characteristics of audio signals obtained by the incorporated microphones to a reference characteristic;

inputting an audio signal from an external microphone in place of all the audio signals or a part of the audio signals obtained by the plurality of incorporated microphones;

setting a corresponding correction characteristic by a correction parameter for the external microphone, the correction parameter being obtained from the external microphone, and correcting the audio signal input from the external microphone to the reference characteristic to produce a corrected audio signal; and

recording the corrected audio signal onto the recording medium.