Holographic stereo system

Abstract

The invention discloses a holographic stereo system. The system comprises a multichannel sound signal production system, a first multi-channel audio power amplifier system, a record and storage system, a m-channel pre-amplifier, a second multi-channel audio power amplifier system and a multi-channel holographic stereo sound producer; the multi-channel sound signal production system produces a m-channel sound electric signal; the first multi-channel audio power amplifier system receives and amplifies a multi-channel sound electric signal produced by the multi-channel sound signal production system; the record and storage system is connected with the first multi-channel audio power amplifier and used for storing the amplified m-channel sound electric signal; the m-channel pre-amplifier is connected with the record and storage system so as to amplify the amplified m-channel sound electric signal; the second multi-channel audio power amplifier system receives and amplifies the multi-channel sound electric signal amplified through the m-channel pre-amplifier; and the multi-channel holographic stereo sound producer is connected with the second multi-channel audio power amplifier system so as to produce sound according to the m-channel sound electric signal. The system disclosed by the invention can realize the reproduction of a multi-point omnidirectional holographic stereo physical sound field.

Description

technical field [0001] The invention relates to the field of audio technology, in particular to a holographic stereo system. Background technique [0002] There are two ways of thinking about simulating biological sensory imaging and physical wave field reproduction imaging in realizing stereo imaging of sound. [0003] The biosensory imaging method is to simulate the difference in the wave field at the positions of the two ears of the human body, so that the brain can get the feeling of the position of the sound source. The current technology is mainly realized by the difference in left and right volume, but in fact, it has not really realized the reproduction of the wave field. Now there is a head-mounted holographic audio technology that simulates the sound field around the human head to achieve sound pickup and playback in the front, rear, left, and right. Affect the presence and comfort of the listener. [0004] The physical wave field reproduction method is to repro...

AI Technical Summary

Problems solved by technology

[0006] 1. The implementation of the physical wave field reproduction method is relatively difficult, and the key lies in whether the directionality of the wave field can be maintained;

[0007] 2. The limitation of the position and posture of the listener, that is, whether the audio-visual floats with the movement of the listener;

[0008] 3. The limitation of depth and breadth, that is, whether the audio and video can only appear in a thin area

Mechanical damping consumes energy, and if energy is lost, the efficiency cannot be improved.

[0012] 2) The contradiction between efficiency and fidelity is serious

The closed box loses the energy behind the diaphragm, and the efficiency is low; the inverted box has high efficiency, but the length of the inverted path has strong frequency selection characteristics, and repeated jumps in the frequency band, resulting in poor frequency response, which results in The contradiction between efficiency and fidelity

[0015] 3) Loss of spatial directionality, stereotaxic positioning is shallow and floating, inaccurate and unreal

In the prior art, incoming waves in any direction and shape are driven by the vertical vibration of the diaphragm surface during playback, and the waves will spread out with the midpoint of the diaphragm as the center of the circle after a certain distance travels, which cannot accurately simulate the spatial distribution of the on-site sound wave field , see image 3 Among them, 301 is the equivalent position of the center of the wave front, and 302 is the diaphragm. When a single-sided diaphragm is used for acoustic-electric conversion, the sound is short-circuited and the force field divergence efficiency is low.

Combined with the current technology, the conversion of sound to electricity and electroacoustics has several major defects, such as low conversion efficiency, loss of directionality, and the sound short circuit of the speaker. This is very unfavorable for the playback of high-fidelity stereo fields. Layers, sound image floating with the position and posture of the sound, and the defects of flat and inelastic sound

[0018] Aiming at the problem that the sound system in the prior art cannot realize holographic stereo pickup and playback, no effective solution has been proposed yet

Images