CN203206451U

CN203206451U - Three-dimensional (3D) audio processing system

Info

Publication number: CN203206451U
Application number: CN 201220372728
Authority: CN
Inventors: 郝立
Original assignee: Individual
Current assignee: Hao Li
Priority date: 2012-07-30
Filing date: 2012-07-30
Publication date: 2013-09-18
Anticipated expiration: 2022-07-30

Abstract

The utility model relates to the audio processing technical field, in particular to a three-dimensional (3D) audio processing system. The three-dimensional (3D) audio processing system is provided with processor chips and a dual-track earphone or sound box; one processor chip analyzes an ordinary 2.0 dual-track three dimensional audio file and makes the ordinary 2.0 dual-track three dimensional audio file converted into a multi-track logic surround sound system through technical splitting; the other processor chip makes the multi-track logic surround sound system converted into a 2.0 dual-track three dimensional audio file through technical merging; and the 2.0 dual-track three dimensional audio file is played by the dual-track earphone or sound box. After an audio file is processed by the 3D (three dimensional) audio processing system, an authentic three-dimensional audio effect that is three-dimensional airy sound can be realized; and compared with ordinary three-dimensional sound, the three-dimensional airy sound is a kind of sound that visionally surrounds a listener. A sound field generated by the three-dimensional airy sound enables a sense of direction of a sound source of original signals, and can generate a sense of surrounding and a sense of expanding of sound in an accompanying mode.

Description

A kind of 3D audio frequency processing system

Technical field

The utility model relates to the audio signal processing technique field, specifically relates to a kind of 3D audio frequency processing system.

Background technology

In the prior art, 2.0 traditional dual track systems only can realize the broadcast of audio frequency, can't reach the effect of stereo surround.If need reach the 3D stereo surround, need the more equipment support.Be example with 5.1 surround sound systems of Doby company, need to be equipped with 5 audio amplifiers, 1 woofer, Doby decoding player, Doby are encrypted blu-ray disc, around 6 sound equipments are arranged in, in the middle of the audience places, realize 3D sound effect physically.

In addition, 5.1 the home theater that sell the existing market, part also can reach physics 3D sound effect, but exists defective as follows:

1, involve great expense, the home theater of a cover 5.1 is wanted ten thousand yuans of 1-2, and this price is that ordinary people is hung back.

2, common 5.1 home theater will have the blue-ray DVD of Doby technical support just can play out surrounding effect, if play other source of sound, as common mp3 file, situations of sounding not of a lot of audio amplifiers will occur, can't realize the 3D sound field effect.

The utility model content

At the technical problem that exists in the prior art, the utility model provides a kind of technology to realize simple 3D audio frequency processing system.

To achieve these goals, the technical scheme of employing is as follows:

A kind of 3D audio frequency processing system, it is characterized in that, have processor chips and dual-channel headphone or audio amplifier, processor chips are analyzed common 2.0 stereophony audio files, and split into multichannel logic ambiophonic system by the processor chips technology, carry out technology by processor chips again and be merged into 2.0 stereophony audio files, and play by dual-channel headphone or audio amplifier.

Specifically, when common 2.0 stereophony audio files enter processor as signal to be identified, processor scans, analyzes and identify it, note signal and noise signal are extracted, and non-linear time coupling will be carried out between signal to be identified and the database standard signal, and then identify acoustic information continuously, make up sound model, at last this source of sound space is stretched, launches, obtain the information that three dimensions comprises length, and 2.0 stereophony audio files after the back output of logic location is handled on the timeline.

Processor identification to as if common double channel stereo audio file in volume, tone color, duration and the pitch of complex tone, complex tone comprises musical sound and noise.

Studies confirm that, the sound wave that sound source is sent is through head, auricle, arrive ears behind the diffraction such as trunk, physical process wherein can be considered the sound filtering system of inconvenience when linear, its characteristic can be described by the frequency domain transfer function of system, psychological study shows, by head, shoulder, the interaction at positions such as auricle, the incident acoustic wave that arrives at ear-drum changes, the characteristic of this variation depends on incident direction, the caused spectral property of such transmission course changes the related transfer function of head that plays an important role in the spatial sound source location relevant with relative direction frequency and hearer, and and have the extremely non-linear relation of complexity between them.

People's the sense of hearing has good spatial impression, the sound source in different spaces orientation produces different acoustic image positions in auditory system, so with the multi-channel system data record, by rational processing, the hearer can obtain the subjective perception to the whole scene acoustic characteristic so that can pass through a set of headphones or a pair of loud speaker as a main body.

The utility model is implemented by above-mentioned 3D audio frequency processing system technology, can realize 3D audio frequency effect (being the unreal sound of 3D) truly.The unreal sound of 3D and normal stereo compare, and refer to that sound seems a kind of mode that the hearer is surrounded.The sound field that this mode produces except the Sounnd source direction sense that is keeping original signal, is also supervened feeling around sense and expansion of sound.

Listening the hearer can clearly distinguish in listening the process of the unreal sound of 3D from up and down sound all around, the unreal sound of 3D can make spatial sound source expand to whole horizontal plane and even vertical plane by line, therefore can reproduce the space reverberation process in the performance Room realistically, have more moving telepresenc, thereby just can build a kind of surround sound effect of placing oneself in the midst of singing-hall, cinema for listening the hearer by a pair of sound equipment or a set of headphones.

The design principle of the unreal sound of 3D is the Auricle effect that has utilized people's ear, namely at playback time, though speaker system in any position, people's ear perceived sounds is from the direction in space corresponding with this frequency response, and irrelevant with the position of audio amplifier.According to this principle, need utilize circuit that acoustical reproduction is made amendment, the frequency response of compensation acoustical reproduction and the difference between the human auditory system frequency response make acoustical reproduction form a complete sound field playback system human psychological and subjective sensation.Realize that sound field accurately locatees, reach up, down, left, right, before and after around sound field, realize that sound is in the interactive hearing enjoying of up, down, left, right, before and after.

The advantage of the unreal sound of 3D is:

1, source of sound is not strict with, it need not equip 5～7 audio amplifiers and sound channel power amplifier.That is to say, only can realize with original dual track audio amplifier and power amplifier, can reach the stereophonic audition impression more than 5.1, so just can be the video display fan and save cost significantly.

2, can make and listen the hearer and produce in-plant appreciation effect, dub if the unreal sound of 3D is used for video display, so no matter play the size in the unreal sound of 3D space, all can make the video display fan that strong telepresenc is arranged, it is specially adapted to home theater and cinema plays.

3, less demanding to the sound equipment software and hardware, and wiring is simple, easy to use.Such as video tape recorder, LD and VCD video disc player, CD-audio player, LP phonograph, multimedia computer, television set.All can be applied in power amplifier, the radio reception tuner.

The difference of the unreal sound technology of 3D and traditional 5.1 sound equipments is:

1, needs one set of headphones or a pair of audio amplifier just can be realized the home theater surround sound effect more than 5.1.

2, do not need to change existing equipment and the acoustic surrounding of family, just can directly reach 5.1 above home theater surrounding effect, i.e. 3D audio frequency effects.

3, source of sound is not strict with, so long as the stereo sound frequency file stereo file such as () MP3 of network download, all can plays, all can reach the 3D audio frequency effect.

The unreal sound technology of 3D and Doby 5.1 surround sound systems are directly contrast between the two:

Doby 5.1 surround sound system=5 audio amplifier+1 woofer+Doby decoding player+Doby is encrypted blu-ray disc.And the unreal sound technology=processor chips of 3D+common headphones or normal stereo audio amplifier+common 2.0 sources of sound (as forms such as MP3, WAV).

The utility model 3D audio frequency processing system has application category comparatively widely, at for example hardware products such as computer sound card, guitar effect device, audio frequency effect device, audio frequency effect card, audio amplifier, earphone, mobile phone, phone, DVD player and VCD machine, video tape recorder, LD machine, CD-audio player, LP phonograph, multimedia computer, television set power amplifier, sound console, and for example in the software products such as software effect device, audio player, movie streams media player, the unreal sound technology of 3D all has widely to be used.

Description of drawings

For the ease of it will be appreciated by those skilled in the art that below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is system architecture diagram of the present utility model.

Embodiment

See also Fig. 1, a kind of 3D audio frequency processing system, have processor chips and dual-channel headphone or audio amplifier, processor chips are analyzed common 2.0 stereophony audio files, and split into multichannel logic ambiophonic system by the processor chips technology, carry out technology by processor chips again and be merged into 2.0 stereophony audio files, and play by dual-channel headphone or audio amplifier, for listening hearer's reception, to reach the technique effect of the unreal sound of 3D.

When common 2.0 stereophony audio files enter processor as signal to be identified, processor scans it, analyze and identification (identification to as if common double channel stereo audio file in the volume of complex tone, tone color, duration and pitch, complex tone comprises musical sound and noise), note signal and noise signal are extracted, and non-linear time coupling will be carried out between signal to be identified and the database standard signal, and then identify acoustic information continuously, make up sound model, at last this source of sound space is stretched, launch, obtain three dimensions and comprise length, wide, high information, and 2.0 stereophony audio files after the back output of logic location is handled on the timeline.

Above content only is to the utility model structure example and explanation; under those skilled in the art described specific embodiment is made various modifications or replenish or adopt similar mode to substitute; only otherwise depart from the structure of utility model or surmount the defined scope of these claims, all should belong to protection range of the present utility model.

Claims

1. a 3D audio frequency processing system is characterized in that having,

Common 2.0 stereophony audio files are handled and are split into the processor chips of multichannel logic ambiophonic system;

Multichannel logic ambiophonic system is handled and is merged into the processor chips of 2.0 stereophony audio files;

Be used for realizing dual-channel headphone or the audio amplifier of the broadcast of 2.0 stereophony audio files.