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A virtual playback method for multi-channel three-dimensional space surround sound

A virtual playback, three-dimensional space technology, applied in the spatial/structural arrangement of speakers, stereo systems, speaker distribution signals, etc., can solve problems such as complex and inability to generate spatial surround sound

Active Publication Date: 2020-08-18
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The playback effect of three-dimensional surround sound is significantly improved compared with horizontal surround sound, but it is more complicated and requires more playback speakers, usually in the form of layered arrangement
Although the structure of this type of technology is relatively simple, due to the limitation of the physical principle of the playback of two real speakers, this type of technology can only produce the sound space effect of the first half of the horizontal plane, and cannot produce a stable vertical space surround sound effect.

Method used

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  • A virtual playback method for multi-channel three-dimensional space surround sound
  • A virtual playback method for multi-channel three-dimensional space surround sound
  • A virtual playback method for multi-channel three-dimensional space surround sound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Embodiment 1 Application of Blu-ray disc player and TV

[0082] Multi-channel spatial surround sound (digital) signals that are decoded from Blu-ray disc players or obtained from digital transmission media press Figure 5 After virtual processing by the method, the four-channel signal E is obtained L1 ,E R1 ,E L2 and E R2 , and then feed a pair of bar speaker systems arranged above and below the TV (monitor), or a pair of bar speaker systems arranged vertically on the left and right sides of the TV, or a pair of speaker systems arranged on the TV The speakers on the left and right sides of the machine and a bar speaker system arranged above the TV reproduce the effect of spatial surround sound. Among them, the virtual signal processing can be used as a part of the hardware circuit in the Blu-ray disc player, or as a part of the hardware circuit in the TV set, or as a hardware circuit in the active speaker system.

Embodiment 2

[0083] Application of Embodiment 2 Home Theater

[0084] The amplifier that feeds the multi-channel spatial surround sound (digital) signal obtained from the decoding output of the Blu-ray disc player or from the digital transmission medium to the home theater, Figure 5 The virtual signal processing is as part of the functional circuitry within the amplifier. Get the four-way signal E L1 ,E R1 ,E L2 and E R2 Afterwards, they are respectively fed to the four external full-band speakers for playback.

Embodiment 3

[0085] Application of embodiment three multimedia computers

[0086] Multi-channel spatial surround sound (digital) signal read by the computer's Blu-ray drive, or through digital transmission media and decoded, and then implemented with computer software Figure 5 The virtual signal processing (can also be realized with a dedicated hardware circuit on the sound card of the computer) to obtain the four-channel signal E L1 ,E R1 ,E L2 and E R2 Afterwards, they are respectively fed to the four full-range speakers of the external connection or the computer itself for playback.

[0087] The present invention specifically introduces the application of 9.1-channel spatial surround sound virtual playback in television as an implementation example, and implements the present invention with a hardware circuit made of a general signal processing chip (DSP). But the present invention is not limited to virtual playback of 9.1-channel spatial surround sound, but also includes virtual p...

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Abstract

A virtual playback method of multi-channel three-dimensional space surround sound according to the present invention, after the signal of multi-channel space surround sound is processed by sum-difference operation and virtual playback signal processing function, it is fed back to the horizontal left front, Right front, four real loudspeakers at 30º±10º high elevation angle plane left front upper and right front upper position reproduce, producing the auditory effect of three-dimensional surround sound. The invention simplifies the number and arrangement of playback loudspeakers required for multi-channel spatial surround sound, and is suitable for TV and other occasions where it is not suitable to arrange multiple loudspeakers for spatial surround sound.

Description

technical field [0001] The invention relates to the technical field of electroacoustics, in particular to a virtual playback method of multi-channel three-dimensional space surround sound. Background technique [0002] At present, multi-channel surround sound technology has developed from traditional horizontal plane surround sound to three-dimensional space surround sound, and has been applied to movies, home audio and video playback and other fields. Traditional horizontal surround sound is arranged using horizontal speakers. For example, the home 5.1-channel surround sound recommended by the International Telecommunication Union adopts five full-band speaker layouts, including left L, middle C, and right R in front of the horizontal front, left surround LS, and right surround RS at the rear, plus optional subwoofers. . The playback effect of three-dimensional surround sound is significantly improved compared with horizontal surround sound, but it is more complicated and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S7/00
CPCH04S7/00H04S7/302H04R3/12H04R5/02H04S2420/01H04S7/303H04S2400/11
Inventor 谢菠荪张承云刘路路
Owner SOUTH CHINA UNIV OF TECH