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Method and device for audio processing

An audio processing and audio signal technology, applied in the field of multimedia, can solve the problem of asynchronous reception of audio and video directions, etc., achieve strong signal directivity, consistent sound characteristics, and achieve the effect of image and sound

Active Publication Date: 2019-09-06
GUOGUANG ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides an audio processing method and device to solve the technical problem that the direction of the audio and video received by the user is not synchronized when the existing portable projector plays the file.

Method used

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  • Method and device for audio processing
  • Method and device for audio processing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] figure 1 It is a flowchart of an audio processing method provided by Embodiment 1 of the present invention. The method provided in this embodiment is applicable to the situation where a portable projector is used for video projection and playback. The method provided in this embodiment can be executed by an audio processing device, which can be implemented by means of software and / or hardware, and integrated in a mobile terminal capable of projection. refer to figure 1 , the method provided in this embodiment specifically includes:

[0072] S110. Receive an audio signal, and divide the audio signal into a high-frequency signal and a low-frequency signal according to a preset frequency dividing point.

[0073] Specifically, the mobile terminal receives the audio signal after the projection is turned on. In this embodiment, the mobile terminal is preferably a portable projector, and the portable projector plays back audio signals through a speaker array. figure 2 Fo...

Embodiment 2

[0086] image 3 It is a flowchart of an audio processing method provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the foregoing embodiments. refer to image 3 , the method provided in this embodiment specifically includes:

[0087] S210. Receive an audio signal, and divide the audio signal into a high-frequency signal and a low-frequency signal according to a preset frequency dividing point.

[0088] S220. Acquire a reflection distance parameter, determine a delay parameter of the low-frequency signal according to the reflection distance parameter, and delay the low-frequency signal according to the delay parameter.

[0089] Wherein, the reflection distance parameter is the distance between the loudspeaker array and the reflection surface.

[0090] Specifically, when the user uses the mobile terminal to perform projection playback, the user may input reflection distance parameters in the mobile terminal in advance. The mobile ...

Embodiment 3

[0114] Figure 6 It is a flowchart of an audio processing method provided by Embodiment 3 of the present invention. This embodiment is optimized on the basis of the foregoing embodiments. refer to Figure 6 , the method provided in this embodiment specifically includes:

[0115] S310. Receive an audio signal, and divide the audio signal into a high-frequency signal and a low-frequency signal according to a preset frequency dividing point.

[0116] S320. Divide the low-frequency signal into a low-frequency sub-signal and a bass signal according to a preset bass frequency division point.

[0117] Considering that when using a speaker array, the low-frequency cutoff frequency of the speaker unit is relatively low. Accordingly, a bass effect unit is provided in the mobile terminal to make up for the lack of low frequency of the speaker unit. Wherein, the preset subwoofer frequency division point is the cut-off frequency of the high-pass filter set in the mobile terminal, and ...

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Abstract

The invention discloses an audio processing method and apparatus. The method comprises the following steps: receiving audio signals, and dividing the audio signals into high frequency signals and low frequency signals according to a preset frequency division point; determining delay parameter, and delaying the low frequency signals according to the delay parameter; mixing the high frequency signals with the delayed low frequency signals to obtain mixing signals, and processing the mixing signals to ensure consistent frequency of replay signals of loudspeaker units in a loudspeaker array; and separately processing the processed mixing signals to the corresponding loudspeaker units, so that the loudspeaker units replay the processed mixing signals. By adoption of the method, the technical problem that when the existing portable projector plays a file, a user receives asynchronous audio and video directions, is solved.

Description

technical field [0001] The present invention relates to the field of multimedia technologies, in particular to an audio processing method and device. Background technique [0002] The projector can project the received video signal or image signal onto the screen so that users can clearly watch the projected image. Therefore, the projector is widely used in homes, offices, schools and entertainment places. In particular, the emergence of portable projectors has made the traditional huge projectors compact, portable, miniaturized, entertaining and practical, making projection technology closer to life and entertainment. [0003] Usually, the portable projector is also equipped with an audio playback system, and when the portable projector plays video, the configured audio playback system is used to play corresponding audio signals. [0004] However, when a user watches a video file played by a portable projector, the user watches the video image through the front screen and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
Inventor 黄坤朋
Owner GUOGUANG ELECTRIC