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Signal processing method for dual-channel stereo signal stimulant 5.1 channel surround sound

A signal processing and stereo technology, applied in stereo systems, quasi-stereo systems, electrical components, etc., can solve problems such as complex algorithms, and achieve the effect of simple and feasible signal processing and natural subjective surround effect

Active Publication Date: 2010-02-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of this method is better, but the algorithm is more complicated

Method used

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  • Signal processing method for dual-channel stereo signal stimulant 5.1 channel surround sound
  • Signal processing method for dual-channel stereo signal stimulant 5.1 channel surround sound
  • Signal processing method for dual-channel stereo signal stimulant 5.1 channel surround sound

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Effect test

Embodiment 1

[0073] The making of embodiment one surround sound program source

[0074] Read the two-channel stereo signal on the CD or hard disk from the CD-ROM of the computer, and then use the computer software to implement Figure 6 The signal processing of simulating 5.1-channel surround sound from the two-channel stereo signal is obtained to obtain five-channel surround sound signals L, R, C, LS, RS, and then recorded on the hard disk or DVD disc as the program signal of 5.1-channel surround sound.

[0075] Table 2 IACC and binaural sound level difference generated by surround sound signal

[0076]

Embodiment 2

[0077] Application of Embodiment 2 Home Theater

[0078] Feed the two-channel stereo (digital) signal output by the CD player to the amplifier of the home theater, figure 2 or Figure 4 The signal processing is done as part of the functional circuitry within the amplifier. The five-channel surround sound signals L, R, C, LS, and RS are obtained, and then respectively fed to five external speakers for retransmission.

[0079] The present invention specifically introduces the realization on the multimedia computer by software. Figure 6 It is a flow chart of signal processing of the present invention realized by software. The signal processing process is to read in the original two-channel stereo signal (from CD-ROM or hard disk), process it, convert to 5.1-channel surround sound signal, and record it on DVD or hard disk.

[0080] The first step: read in the original two-channel stereo time-domain signal in the CD-ROM, denoted as l 0 、r 0 .

[0081] The second step: use ...

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Abstract

The invention discloses a signal processing method to simulate 5.1 channel surround sound with dual-channel stereo. Wherein, inputting original dual-channel left and right stereo signal L0 and R0 to generate front three-channel signal L, R and C for 5.1 channel surround sound to extract environmental acoustics information S; delaying, bandpass filtering, random delaying to six sub-band, and obtaining a couple of surround sound signal LS and RS to feedback to 5.1 channel surround sound system for retransmission to generate dual-ear acoustic pressure with low correlatively on listener ears and well, natural subjective surround feeling. This invention is simple and feasible.

Description

technical field [0001] The invention relates to the technical field of stereo and surround sound, in particular to a signal processing method for simulating 5.1-channel surround sound from a two-channel stereo program signal. Background technique [0002] At present, the 5.1 channel system has been recommended as the international standard for surround sound, and has been widely used in DVD, home theater and other sound reproduction. It uses front left L, center C, right R, left surround LS, right surround RS five independent full-band channels and speakers, plus a selectable low-frequency effect channel LFE. Compared with ordinary two-channel stereo, 5.1-channel surround sound adds a center speaker in front, which can achieve the purpose of improving the stability of the front sound image and expanding the listening area; while the two surround channels provide certain side and rear sound In addition to the image, it is more important to provide environmental acoustic info...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S5/00
Inventor 蔡阳生谢菠荪饶丹
Owner SOUTH CHINA UNIV OF TECH
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