CN103702275A - Sound image repositioning technology - Google Patents

Abstract

The invention discloses a sound image repositioning technology, which is characterized in that sound sources needing later-period sound image repositioning are independently acquired and respectively recorded, and the proportion of each sound source in each sound channel is properly distributed according to the site feature during replay, so that the sound sources can generate mutually independent sound image positions. In addition, the position of each source image is changed according to the needs in the replay process, so that listeners have an immersive feel that the sound images move around the listeners.

Description

Acoustic image re-positioning technology

Technical field

The present invention relates to a kind of acoustic image re-positioning technology, belong to sound recording, playback and Sound image localization field.

Background technology

Current Sound image localization technology is mostly confined to sound recording and just determines the position of acoustic image early stage, in later stage playback procedure, substantially can not again change acoustic image positions; Or by electronic technology simulation, expand out some false acoustic images, acoustic image positions blur effect is poor.Acoustic image reorientation refers in sound reproduction process, can again change as required the position of acoustic image, makes audience can experience acoustic image and at periphery, moves on the spot in person.

Summary of the invention

The object of the invention is for addressing the above problem.In order to achieve the above object, the invention provides following technical scheme:

When sound recording, often there is very multi-acoustical, for system is too complicated, sound source is not divided into two classes: a class is the main sound source that needs later stage acoustic image reorientation, and another kind of is the basic sound source that does not need later stage acoustic image reorientation.For not needing the basic sound source of later stage reorientation by 8 sound channel records, playback time enters respectively each corresponding sound channel.

To need each main sound source of later stage acoustic image reorientation independently to gather record respectively, playback time suitably distributes the ratio of each main sound source in each sound channel according to on-the-spot feature, makes each main sound source can produce mutually independently acoustic image positions.And can in playback procedure, change on demand the position of each main sound source acoustic image, make audience can experience acoustic image and at periphery, move on the spot in person.

Accompanying drawing explanation

Accompanying drawing is the schematic layout pattern that the present invention adopts 8 sound channel playback times.

Sound channel L represents L channel, and sound channel R represents R channel, and sound channel Lb represents left rear channels, sound channel Rb represents right rear channels, and sound channel Lu represents upper left side sound channel, and sound channel Ru represents upper right side sound channel, sound channel Lbu represents left rear sound channel, and sound channel Rbu represents right back portion top sound channel.

Embodiment

Below with reference to specific embodiment, technical scheme provided by the invention is elaborated, should understands following embodiment and only for the present invention is described, is not used in and limits the scope of the invention.

It is shown in the drawings that for the present invention adopts the schematic layout pattern of 8 sound channel playback times, f (i) is the function of main sound source i, the acoustic image positions of sound source i (Xi, Yi, Zi), and C is location constant, n is the sum that needs the main sound source of later stage acoustic image reorientation.The function of basic sound source in 8 sound channels is respectively: f (L), f (R), f (Lb), f (Rb), f (Lu), f (Ru), f (Lbu), f (Rbu); 8 sound channel transfer functions are respectively: Φ (L), Φ (R), Φ (Lb), Φ (Rb), Φ (Lu), Φ (Ru), Φ (Lbu), Φ (Rbu).

The transfer function of 8 sound channels can be expressed as respectively so:

$\mathrm{\Φ}\left(L\right)=f\left(L\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f(C-\mathrm{Xi})*f(C-\mathrm{Yi})*f(C-\mathrm{Zi})\}$

$\mathrm{\Φ}\left(R\right)=f\left(R\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f\left(\mathrm{Xi}\right)*f(C-\mathrm{Yi})*f(C-\mathrm{Zi})\}$

$\mathrm{\Φ}\left(\mathrm{Lb}\right)=f\left(\mathrm{Lb}\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f(C-\mathrm{Xi})*f(C-\mathrm{Yi})*f\left(\mathrm{Zi}\right)\}$

$\mathrm{\Φ}\left(\mathrm{Rb}\right)=f\left(\mathrm{Rb}\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f\left(\mathrm{Xi}\right)*f(C-\mathrm{Yi})*f\left(\mathrm{Zi}\right)\}$

$\mathrm{\Φ}\left(\mathrm{Lu}\right)=f\left(\mathrm{Lu}\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f(C-\mathrm{Xi})*f\left(\mathrm{Yi}\right)*f(C-\mathrm{Zi})\}$

$\mathrm{\Φ}\left(\mathrm{Ru}\right)=f\left(\mathrm{Ru}\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f\left(\mathrm{Xi}\right)*f\left(\mathrm{Yi}\right)*f(C-\mathrm{Zi})\}$

$\mathrm{\Φ}\left(\mathrm{Lbu}\right)=f\left(\mathrm{Lbu}\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f(C-\mathrm{Xi})*f\left(\mathrm{Yi}\right)*f\left(\mathrm{Zi}\right)\}$

$\mathrm{\Φ}\left(\mathrm{Rbu}\right)=f\left(\mathrm{Rbu}\right)+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\{f\left(i\right)*f\left(\mathrm{Xi}\right)*f\left(\mathrm{Yi}\right)*f\left(\mathrm{Zi}\right)\}$

Like this, want to regulate the acoustic image positions of main sound source i, just passable as long as given corresponding location parameter (Xi, Yi, Zi) can obtain the ratio of sound source (i) in each sound channel by calculating, make its Sound image localization in (Xi, Yi, Zi).

The disclosed technological means of the present invention program is not limited only to the disclosed technological means of above-mentioned execution mode, also comprises the technical scheme being comprised of above technical characterictic combination in any.

Claims (2)

1. an acoustic image re-positioning technology, it is characterized in that: will need each main sound source of later stage acoustic image reorientation independently to gather record respectively, playback time suitably distributes the ratio of each main sound source in each sound channel according to on-the-spot feature, makes each main sound source can produce mutually independently acoustic image positions.

2. a kind of acoustic image re-positioning technology according to claim 1, is characterized in that: the acoustic image positions that can change as required each main sound source in playback procedure.

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