Unlock instant, AI-driven research and patent intelligence for your innovation.

Source component environment component extraction method for stereo

A technology of environmental components and extraction methods, applied in stereo systems, voice analysis, instruments, etc., can solve problems that do not meet irrelevant ideal conditions, and achieve the effect of superior decomposition performance

Active Publication Date: 2018-12-18
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sound phase is also introduced between the environmental components in the two channels, which leads to the correlation of the environmental components in the two channels, which does not meet the ideal condition that the environmental components in the two channels are uncorrelated, so there is It is necessary to improve the extraction method of environmental components to solve related technical problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Source component environment component extraction method for stereo
  • Source component environment component extraction method for stereo
  • Source component environment component extraction method for stereo

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0088] First, make the stereo as follows:

[0089] (1) The monophonic speech audio signal is used as the source component of the left channel, and then it is multiplied by the source pan factor k=2, as the source component of the right channel, and the left channel audio signal of the wave impact sound is used as The ambient component of the left channel is Hilbert-transformed to obtain the ambient component of the right channel.

[0090] (2) Calculate the power of the source component and the environment component respectively, and process the source components of the two channels so that the ratio of the total source component power to the total power is 0.8.

[0091] (3) Mix the source component and environment component of the left and right channels respectively to obtain the output signals of the left and right channels, that is, obtain the stereo audio signal to be extracted from the source environment by the new method.

[0092] Then, frame the output signals of the l...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a source component environment component extraction method for stereo, and aims to solve the correlation technical problems between left and right channel environment components formed by a major constituent analysis algorithm. The new source component environment component extraction method comprises the following steps: defining an amplitude ratio [beta] between two soundchannel environment components, thus ensuring the left sound channel source component to be vertical to the environment component without requiring the right sound channel source component to be vertical to the environment component; requiring the environment components to be irrelevant. The method can derive the unique solution via the source environment component extraction. The method is applied to multi-audio frequency processing that expands stereo audio frequency into multi-track audio frequency, and adjusts the environment component amplitude ratio [beta]; the source component environment component extraction method is applicable to various different sound scenes.

Description

technical field [0001] The invention belongs to the technical field of audio processing, and in particular relates to the extraction technology of stereo source components and environment components. Background technique [0002] In order to pursue a more immersive listening experience, multi-channel playback devices are becoming more and more popular, such as speaker systems, home theater systems, and even gaming headsets are equipped with physical multi-channel, that is, several independently controlled sound units. However, the currently widely used audio format is still dominated by stereo audio. Stereo audio has the advantages of easy transmission and storage, and has a huge market share. Obviously, there is a mismatch between multi-channel playback devices and stereo audio, so there is a practical problem, that is, how to expand stereo audio signals into multi-channel audio signals, so as to maximize the use of multi-channel devices to restore Stereoscopic and immers...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G10L21/0272H04S7/00
CPCH04S7/00G10L21/0272
Inventor 史创方惠李会勇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA