A three-channel holographic sound field playback method and sound field collecting device

A three-channel, sound field technology, applied to stereo systems, electrical components, etc., can solve problems such as a large number of speakers and complex systems, and achieve good listening effects, convenient collection, and simple structure

Active Publication Date: 2015-03-04
BEIJING SAIBIN TECH
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  • Claims
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Problems solved by technology

However, if this method wants to obtain a very realistic sense of presence, a large number of speakers and a very complex system are required.

Method used

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  • A three-channel holographic sound field playback method and sound field collecting device
  • A three-channel holographic sound field playback method and sound field collecting device
  • A three-channel holographic sound field playback method and sound field collecting device

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Embodiment Construction

[0020] Such as image 3 As shown, the multi-channel audio source 1 outputs the left channel signal, the right channel signal and the front channel signal, and the output left channel signal and right channel signal are respectively directly input into the left channel speaker 2 and the right channel speaker 3. The front channel signal output by the multi-channel audio source is input to the front channel speaker 4 after gain control. During gain control, the playback gain of each subband signal of the front channel signal is adjusted according to the gain function Gain(t, f, θ), and then the front channel signal to be played back is synthesized according to the windowing and superposition method, where the gain The control function Gain(t, f, θ) is related to time t, frequency f, and direction of arrival θ of the time-frequency signal.

[0021] Such as Figure 4 As shown, the gain control function Gain(t, f, θ) is obtained by time-frequency transforming the left channel sign...

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Abstract

The present invention relates to a three-channel holographic sound field playback method and a sound field collecting device. A multichannel sound source outputs a left sound channel signal, a right sound channel signal, and a front sound channel signal, wherein the output left sound channel signal and the right sound channel signal are directly input into a left sound channel speaker and a right sound channel speaker, respectively, which is characterized in that: the front sound channel signal output by the multichannel sound source is input into a front sound channel speaker after gain control.

Description

technical field [0001] The invention relates to a three-channel holographic sound field playback method and a sound field acquisition device. Background technique [0002] The initial production of stereo recordings or music was basically based on the configuration of stereo speakers based on a 60-degree triangle. When people listen, if they do not use headphones to play back in the living room, the width of the sound image is narrow, and it is difficult to show surround sound, and the listening effect is not ideal. In the prior art, two methods are generally adopted in order to improve the listening effect. One method is still based on stereo speakers, but performs crosstalk cancellation signal processing to improve the perceived sound image width, such as figure 1 As shown, but on the one hand, this processing method has limited sound image expansion, and at the same time, the processing brings large distortion, which has a great impact on the timbre, and greatly affects t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S3/00
Inventor 张德明
Owner BEIJING SAIBIN TECH
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