Headphone dynamic virtual replaying method based on 5.1 channel surround sound and implementation device thereof

A virtual playback and surround sound technology, applied in stereo systems, quasi-stereo systems, electrical components, etc., can solve the problems of large computing resources, large size, and high power consumption, and achieve low computational complexity, small size, and power consumption. small effect

Active Publication Date: 2015-01-14
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the above-mentioned head tracker products are generally large in size and high in price, require a large amount of computing resources, and consume a large amount of power, so they are only suitable for professional applications such as scientific research and engineering technology for real-time rendering of virtual auditory environments. , not suitable for portable consumer electronics applications

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  • Headphone dynamic virtual replaying method based on 5.1 channel surround sound and implementation device thereof
  • Headphone dynamic virtual replaying method based on 5.1 channel surround sound and implementation device thereof
  • Headphone dynamic virtual replaying method based on 5.1 channel surround sound and implementation device thereof

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention is not limited to the range indicated by the examples.

[0030] The system block diagram of the present invention is as figure 1 As shown, it includes three parts: input initial data (5.1 channel input signal, speaker position and HRTF data), dynamic signal processing and binaural signal synthesis, and earphone playback.

[0031] figure 2 It is a schematic diagram of the hardware composition of the system using a personal computer for signal processing, including a personal computer, a sound card supporting ASIO functions, earphones, and a head tracker module. The computer is the information processing center of the whole system. Before the system starts to work, the computer first downloads the parameters through the USB interface to complete the initialization of the head tracking module and the s...

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Abstract

The invention discloses a headphone dynamic virtual replaying method based on 5.1 channel surround sound and an implementation device of the method. According to the method, the horizontal rotation angle of the head of a listener is detected in real time through a head trace tracking module; according to the parameters, all virtual loudspeakers of a 5.1 channel are simulated dynamically in real time; afterwards, conversion is performed, so that a binaural sound signal is obtained, and real-time rendering in the horizontal direction is achieved. The applied head trace tracking module is composed of a magnetic sensor, an acceleration sensor, a single-chip microcomputer and the like. With no need for a signal transmitting device, the horizontal rotation angle of the listener is calculated according to physical information change which is caused by head movement and obtained through the magnetic sensor and the acceleration sensor. The head trace tracking module can be directly installed on a headphone and powered by a battery or a USB interface. The binaural sound signal is replayed through the headphone after being subject to headphone-auditory meatus transmission characteristic equilibrium processing, and therefore a 5.1 channel surround sound effect similar to replaying of a loudspeaker can be achieved.

Description

technical field [0001] The patent of the present invention relates to the field of electro-acoustic technology, in particular to a method for dynamic virtual playback of earphones with 5.1-channel surround sound and a device for its realization. Background technique [0002] 5.1-channel surround sound has 5 full-band channels of front left (L), center (C), right (R), left surround (LS), and right surround (RS), plus a low-frequency effect channel (LFE). The signals of each channel are replayed according to the standard loudspeaker arrangement recommended by the International Telecommunication Union, so that the auditory effect of horizontal surround sound can be obtained. However, in some applications, such as various handheld or portable playback devices, multimedia computers, etc., it is sometimes necessary to replay 5.1 channel surround sound signals through headphones. This playback method damages the spatial information of the sound, makes it impossible to obtain a cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S5/00
Inventor 张承云谢菠荪
Owner SOUTH CHINA UNIV OF TECH
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