Sound signal processing method and sound signal processing device

A signal processing device and signal processing technology, applied in signal processing, speech analysis, public address system, etc., can solve the problem of inability to realize sound field assistance

Active Publication Date: 2021-08-20
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if an electronic musical instrument or the like uses the sound picked up by a microphone to assist the sound field, it may not be possible to achieve the desired sound field assist.

Method used

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  • Sound signal processing method and sound signal processing device
  • Sound signal processing method and sound signal processing device
  • Sound signal processing method and sound signal processing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] figure 1 It is a perspective perspective view schematically showing the chamber 62 constituting the space. figure 2 It is a block diagram showing the configuration of the sound field assisting system 1 .

[0032] The chamber 62 constitutes a substantially rectangular parallelepiped space. A sound source 61 exists on a stage 60 in front of a room 62 . The rear of the room 62 corresponds to an auditorium where the audience sits. In addition, the shape of the chamber 62 and the arrangement of sound sources are not limited to figure 1 example of. The sound signal processing method and sound signal processing device of the present invention can provide a desired sound field regardless of the shape of the space, and can realize richer sound and image and space expansion than before.

[0033] The sound field assisting system 1 has a directional microphone 11A, a directional microphone 11B, a directional microphone 11C, an omnidirectional microphone 12A, an omnidirectiona...

Embodiment approach 2

[0095] refer to Figure 8 , Figure 9 , Figure 10 and Figure 11 A sound field assisting system 1A according to Embodiment 2 will be described. Figure 8 It is a perspective perspective view schematically showing the space 620 . Figure 9 It is a plan view overlooking the observation space 620 . Figure 10 It is a block diagram showing the configuration of the sound field assisting system 1A.

[0096] Figure 11 is a flowchart showing the operation of the audio signal processing device. In this example, it is assumed that the sound source 61 moves on the stage 60 or that a plurality of sound sources 61 exist on the stage 60 . In addition, about the same structure as Embodiment 1 mentioned above, the same code|symbol is attached|subjected, and description is abbreviate|omitted.

[0097] Sound field auxiliary system 1A such as Figure 8 and Figure 9 As shown, there are speaker 52A, speaker 52B, speaker 52C, speaker 52D, speaker 52E, speaker 53A, speaker 53B, speaker ...

Embodiment approach 3

[0143] refer to Figure 13 , Figure 14 and Figure 15 A sound field assisting system 1B according to Embodiment 3 will be described. Figure 13 It is a perspective perspective view schematically showing the chamber 62B of the third embodiment. Figure 14 It is a block diagram showing the configuration of the sound field assisting system 1B. Figure 15 is a flowchart showing the operation of the audio signal processing device according to the third embodiment. Embodiment 3 assumes a case where output sounds from the sound source 611B, the sound source 612B, and the sound source 613B are line-input. In addition, about the same structure as Embodiment 1 mentioned above, the same code|symbol is attached|subjected, and description is abbreviate|omitted. Line input refers to inputting sound signals from audio cables connected to the sound source instead of picking up sound output from sound sources such as various musical instruments described later with a microphone. On the ...

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Abstract

The purpose of the present invention is to assist a desired sound field for an electronic musical instrument or the like. A sound signal processing method includes performing line input on a sound signal, performing volume control on the line-input sound signal, and generating an initial reflected sound analog signal according to the volume-controlled sound signal.

Description

technical field [0001] One embodiment of the present invention relates to a sound signal processing method and a sound signal processing device for processing an input sound signal. Background technique [0002] In facilities such as concert halls, music of various genres (Genre) is performed. Various acoustic characteristics (such as reverberation characteristics) are required for such facilities as described above. [0003] However, in order to physically change the reverberation characteristics in a concert hall, for example, it is necessary to change the size of the acoustic space by moving the ceiling, which requires very large-scale equipment. [0004] Therefore, for example, in the sound field control device as shown in Patent Document 1, the sound obtained by the microphone is processed by an FIR (Finite Impulse Response) filter to generate a reverberation sound, and the reverberation sound is output from a speaker installed in a concert hall. This performs the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S7/00
CPCH04S7/305H04S2400/13H04R27/00H04R2227/007G10K15/12G10L19/008G10K15/08H04R3/00H04R29/001H04R2430/01H04S3/008H04S7/30H04S2400/01
Inventor 渡边隆行桥本悌
Owner YAMAHA CORP
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