CN-122027971-A - Audio device and portable apparatus

CN122027971ACN 122027971 ACN122027971 ACN 122027971ACN-122027971-A

Abstract

The object is to provide an audio device and a portable device which generate a good sense of localization and sense of presence. The game controller 100 is provided with a left speaker L_SPK at a position on the left side of the front side, a right speaker R_SPK at a position on the right side of the front side, a center speaker C_SPK at a position on the center in the left-right direction of the front side, and a rear center speaker CU_SPK at a position on the center in the left-right direction of the rear side. The stereo signals SigIN of the left and right 2 channels of Lin and Rin output from the sound source device 1 are up-mixed to generate 3-channel surround audio signals composed of Lmid, rmid, cmid audio signals. Lmid is Lin, rmid is Rin, cmid is the sum of Lin, rin's components associated with the other party. Lmid is output from the left speaker L_SPK, rmid is output from the left speaker R_SPK, and sound obtained by imparting a reverberation effect to Cmid is output from the rear center speaker CU_SPK.

Inventors

Nihei ichijo
Nino Keita
Chaki Hideto

Assignees

阿尔卑斯阿尔派株式会社

Dates

Publication Date: 20260512
Application Date: 20251104
Priority Date: 20241108

Claims (7)

1. An audio device, comprising: A left speaker arranged at a position on the left side when viewed from the user of a portable device used in a manner to be held by the user, and outputting a sound in the direction of the user; A right speaker arranged at a position on the right side of the portable device when viewed from the user, and configured to output sound in a user direction; A rear center speaker arranged at a center of the portable device when viewed from a user and outputting sound in a direction opposite to the user direction; an analog surround signal generating unit that generates, from audio signals that are objects of audio signals of left and right 2 channels, an audio signal of a left channel, an audio signal of a right channel, and an audio signal of a center channel that is an audio signal representing mutually related components in the audio signals of the left and right 2 channels, and A reverberation effect imparting unit for imparting a reverberation effect to the audio signal of the center channel to generate the audio signal imparted with the reverberation effect as the audio signal of the rear center channel, The audio signal of the left channel is output from the left speaker, the audio signal of the right channel is output from the right speaker, and the audio signal of the rear center channel is output from the rear center speaker.
2. The audio device of claim 1, wherein the audio device comprises a speaker, The portable device is provided with a central speaker which is arranged at a position of the portable device which is the center when the portable device is observed by a user and outputs sound to the direction of the user, An audio signal of the center channel is output from the center speaker.
3. The audio device of claim 1, wherein the audio device comprises a speaker, The audio signal processing device includes a localization processing unit that generates, as the left and right 2-channel target audio signals, an audio signal obtained by convoluting a head transfer function from a localization position of a target sound image to a left ear of a user with audio signals of 1 channel of a monaural channel, and an audio signal obtained by convoluting a head transfer function from a localization position of a target sound image to a right ear of a user with audio signals of 1 channel.
4. The audio device of claim 1, wherein the audio device comprises a speaker, Comprises a sensor for detecting a value related to the reflection of sound outputted from the rear center speaker, The reverberation effect imparting means changes a characteristic of the reverberation effect according to a condition of reflection estimated from a value detected by the sensor.
5. The audio device of claim 1, wherein the audio device comprises a speaker, A sensor that detects a distance from a reflector that reflects sound output from the rear center speaker in a direction opposite to a user direction when viewed from the portable device, The reverberation effect imparting unit changes a characteristic of the reverberation effect according to a distance from the reflector detected by the sensor.
6. A portable device provided with the audio device according to any one of claims 1 to 4 and 6.
7. The portable device of claim 6, wherein, The portable device is a game controller.

Description

Audio device and portable apparatus Technical Field The present invention relates to an audio device and a portable apparatus. Background As a technique related to the present invention, a technique is known in which sound transfer characteristics (head transfer functions) from a sound image localization target position to each of the left and right ears of a listener are convolved with audio signals to generate L, R-channel audio signals, and the audio signals are output to left and right speakers, thereby providing a localization feeling of a sound image to the sound image localization target position (for example, patent literature 1). Prior art literature: Patent literature: Patent document 1 Japanese patent No. 3395809 Disclosure of Invention Problems to be solved by the invention: When the above-described technique of outputting the audio signal of L, R channels, which is convolved with the head transfer function of each of the left and right ears, to the left and right speakers provided in a relatively small portable device such as a game controller, it is difficult to generate an acoustic image having a good sense of localization and sense of presence due to factors such as the size. Accordingly, an object of the present invention is to provide an audio device capable of generating an audio image having a good sense of localization and a good sense of presence even in a portable device. Means for solving the problems: In order to achieve the above object, the present invention provides a left speaker arranged at a position on the left side of a portable device used in a manner to be held by a user when viewed from the user and outputting sound in the user direction, a right speaker arranged at a position on the right side of the portable device when viewed from the user and outputting sound in the user direction, a rear center speaker arranged at a position on the center of the portable device when viewed from the user and outputting sound in a direction opposite to the user direction, an analog surround signal generating unit that generates an audio signal of a left channel, an audio signal of a right channel, and an audio signal of a center channel from object audio signals of left and right 2 channels, the audio signal of the center channel being an audio signal representing components correlated with each other among the audio signals of the left and right 2 channels, and a reverberation effect imparting unit that imparts a reverberation effect to the audio signal of the center channel and generates the audio signal to which the reverberation effect is imparted as an audio signal of the rear center channel. Here, the audio signal of the left channel is output from the left speaker, the audio signal of the right channel is output from the right speaker, and the audio signal of the rear center channel is output from the rear center speaker. In addition, the audio device may be provided with a center speaker which is disposed at a position of the portable device which is at a center when viewed from a user, and outputs a sound in a direction of the user, and the audio signal of the center channel may be output from the center speaker. In the audio device, a localization processing unit may be provided that generates, as the left and right 2-channel target audio signals, an audio signal obtained by convoluting a head transfer function from a localization position of a target sound image to a left ear of a user with an audio signal of 1 channel of a monaural, and an audio signal obtained by convoluting a head transfer function from a localization position of a target sound image to a right ear of a user with an audio signal of 1 channel. In addition, the audio device may be provided with a sensor that detects a value related to a state of reflection of the sound output from the rear center speaker, and the reverberation effect applying means may change a characteristic of the reverberation effect based on the state of reflection estimated from the value detected by the sensor. The audio device may further include a sensor that detects a distance from a reflector that reflects sound output from the rear center speaker, the rear center speaker being located in a direction opposite to a user direction when viewed from the portable device, and the reverberation effect applying unit may change a characteristic of the reverberation effect according to the distance from the reflector detected by the sensor. According to the above-described audio device, the audio signal of the center channel is generated from the audio signal of the left channel and the audio signal of the right channel, the audio signal of the left channel is output from the left speaker, the audio signal of the right channel is output from the right speaker, and the audio signal of the center channel is given a reverberation effect and is output from the rear center speaker as the audio signal of the rear center channel. Therefore, it is