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Audio data processing device, audio device, audio data processing method, program, and recording medium

A technology of audio data and processing devices, which is applied in the field of audio data processing devices, can solve problems such as insufficient avoidance and residual waveform distortion, and achieve the effects of eliminating waveform distortion and correcting waveform distortion

Inactive Publication Date: 2012-09-05
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technique described in Patent Document 1 only attempts to smooth audio data
That is, in the content described in Patent Document 1, it is not a technology to specify waveform distortion according to the proximity and distance of a virtual sound source from a speaker and perform different corrections according to the specified waveform distortion.
Therefore, in the technique described in Patent Document 1, there is a problem that the effect of avoiding noise caused by waveform distortion cannot be sufficiently obtained because waveform distortion remains in many cases.

Method used

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  • Audio data processing device, audio device, audio data processing method, program, and recording medium
  • Audio data processing device, audio device, audio data processing method, program, and recording medium
  • Audio data processing device, audio device, audio data processing method, program, and recording medium

Examples

Experimental program
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Effect test

Embodiment approach 1

[0063] First, the calculation model that assumes that the virtual sound source does not move within the acoustic space provided by the WFS and the calculation model that takes the movement of the virtual sound source into account will be described first, and then the description of the embodiment will be given.

[0064] figure 1 It is an explanatory diagram of an example of the acoustic space provided by WFS. exist figure 1 In the shown acoustic space, a speaker array 103 including M speakers 103_1 to 103_M and a listener 102 facing the speaker array 103 and listening to sound exist. In this acoustic space, wavefronts of sounds radiated from M speakers 103_1 to 103_M are wavefront-synthesized based on Huygens' principle, and propagate in the acoustic space as composite wavefronts 104 . At this time, the listener 102 feels that the sound actually radiated from the speaker array 103 is radiated from N virtual sound sources 101_1 to 101_N that do not actually exist located behi...

Embodiment approach 2

[0156] Figure 19 It is a block diagram showing an example of the internal configuration of the audio device according to the second embodiment. With respect to Embodiment 1 executing the program stored in the ROM 1112 in the audio device 1100, Embodiment 2 reads the program stored in an erasable EEPROM (Electrically Erasable Programmable Read-Only Memory,] Electrically Erasable Read-Only Memory) or internal The program stored in the storage device 25 is executed. The audio device 1100 includes an EEPROM 24 , an internal storage device 25 , and a recording medium reading unit 23 . CPU 17 reads program 231 from recording medium 230 such as CD (Compact Disk)-ROM or DVD (Digital Versatile Disk)-ROM inserted into recording medium reading unit 23 and stores it in EEPROM 24 or internal storage device 25 . The CPU 17 reads the program 231 stored in the EEPROM 24 or the internal storage device 25 into the RAM 18 and executes it.

[0157] The program 231 is not limited to being read...

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Abstract

Disclosed is an audio data processing device and the like that can markedly decrease noise caused by waveform distortion by means of canceling waveform distortion arising when a virtual sound source moves. The present disclosures include: a step for calculating the distance between the position of a virtual sound source and a speaker at differing points in time; a step for determining whether the virtual sound source is approaching or retreating from the speaker when the distances differ; and a step for identifying and correcting a portion with waveform distortion in response to the approach / retreat.

Description

technical field [0001] The present invention relates to an audio data processing device, an audio device, an audio data processing method, a program, and a recording medium recording the program. Background technique [0002] In recent years, audio systems based on wave field synthesis technology (Wave Field Synthesis: WFS) have been intensively studied mainly in Europe (see, for example, Non-Patent Document 1). WFS refers to a technique for synthesizing sound wavefronts radiated from a plurality of speakers arranged in an array (hereinafter referred to as “speaker array”) based on the Huygens principle. [0003] In the acoustic space provided by WFS, the listener facing the sound heard by the speaker array feels that the sound actually radiated from the speaker array appears to be coming from a sound source that exists virtually behind the speaker array. (hereinafter referred to as "virtual sound source") radiated (for example, refer to figure 1 ). [0004] As devices to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S5/02H04S7/00
CPCH04R1/403H04R3/12H04R2201/403H04S3/008H04S7/30H04S2400/11
Inventor 佐藤纯生服部永雄倪婵斌
Owner SHARP KK
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