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Three-dimensional ring sound effect technique aimed at dual-track earphone equipment

An earphone and three-dimensional technology, which is applied in the field of enhancing the sound effect of handheld devices, can solve the problems that the two-channel headphone system cannot be provided, the sound of the two-channel headphone system is not full enough, and the three-dimensional ring sound effect cannot be simulated.

Inactive Publication Date: 2008-05-21
昊迪移通(北京)技术有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is dedicated to seeking to expand and enhance the sound effect of the binaural earphone system, and aims to solve the related problem that the sound of the binaural earphone system is not full enough, and enhance the user's audio experience
[0005] The traditional headphone three-dimensional surround sound effect method, as shown in Figure 1, is not accurate enough to describe the HRTF and interaural differences of the human auditory system
Therefore, this method cannot provide an accurate model for a real two-channel headphone system, and cannot simulate high-quality three-dimensional surround sound effects

Method used

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  • Three-dimensional ring sound effect technique aimed at dual-track earphone equipment
  • Three-dimensional ring sound effect technique aimed at dual-track earphone equipment
  • Three-dimensional ring sound effect technique aimed at dual-track earphone equipment

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Embodiment Construction

[0018] As shown in Fig. 2, the present invention is realized through a three-dimensional earphone surround sound engine, and is applicable to any consumer electronic device. The three-dimensional surround sound engine 200 is composed of a left channel HRTF filter 210, a right channel HRTF filter 250, a left channel delay input mixer 215, a right channel delay input mixer 255, and a left channel delay estimator 220, the right channel delay estimator 260, the left channel output mixer 230, and the right channel output mixer 270 are composed.

[0019] Different from the traditional three-dimensional headphone surround sound effect method, the present invention uses the original audio input and the filtered audio mixed signal as the delayed input. The raw audio represents the direct sound, and the filtered audio represents the virtual positional sound source. In this way, the obtained results better reflect the subjective experience of the human auditory system.

[0020] In orde...

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Abstract

The invention relates to a three dimensional stereophonic sound effect method and the equipment for headphone sound systems, which can extend a dual-track audio frequency signal to a multi-track audio frequency signal with three dimensional stereophonic sound effect. The invention builds a new model according to the subjective perception principle of human hearing. The position of the virtual sound source can be reflected from the two following parameters: (1) fuzzy vertebral body which is annularly formed with the central part of the head and can be described using HRTF (Head-Related Transfer Function). (2) interaural difference which can be described using interaural intensity and time difference. The invention takes a full consideration of the relation between the HRTF filter and the interaural difference processing system and can realize better subjective stereophonic sound effect compared with the prior art. The invention has the advantages of convenient implementation and high efficiency for reconstructing the three dimensional stereophonic sound effect for dual track headphone sound systems.

Description

technical field [0001] The present invention relates to a method and device capable of extending a binaural audio source to a three-dimensional surround sound effect for binaural earphones, and in particular to a method and device capable of enhancing the sound effect of a handheld device. [0002] According to the example of the present invention, the three-dimensional surround sound technology provides a two-channel audio reconstruction system, which only needs to transmit the same sound source signal to two channels, pass through the filtering system, and adjust some adjustable parameters, then The auditory position of these reconstructed virtual sound sources can be changed. The normal work of the three-dimensional surround sound technology for binaural earphones is based on the following two findings: (1) Under the condition of earphone audio output, the spatial direction of sound recognizable by the human subjective auditory system can be mathematically modeled, head-rel...

Claims

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Application Information

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IPC IPC(8): H04S7/00H04S5/02
Inventor 高成伟
Owner 昊迪移通(北京)技术有限公司
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