CN103702274B - Stereo-circulation is low voice speaking construction method and device - Google Patents

Abstract

The present invention proposes the low voice speaking construction method of stereo-circulation and device.Method comprises: establish total N number of loud speaker, and the n-th (1≤n≤N) individual loud speaker and N-n+1 loud speaker form loud speaker pair; For arbitrary loud speaker n, for loud speaker n selects the audio-source identical with other N-1 loud speaker; According to virtual preposition audio amplifier and virtual surround speaker conversion factor, pumping signal audio source signal being converted to stereo-circulation sound outputs to loud speaker n, wherein, described virtual preposition audio amplifier conversion factor by: convert loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and obtain in the superposition acoustic pressure at left and right ear place, described virtual surround speaker conversion factor by: convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and obtain in the superposition acoustic pressure at left and right ear place.Present invention improves the audio of ordinary stereo sound source and normal stereo playback equipment.

Description

Stereo-circulation is low voice speaking construction method and device

Technical field

The present invention relates to Audiotechnica field, particularly relate to the low voice speaking construction method of stereo-circulation and device.

Background technology

Existing audio frequency is mostly common double channel stereo, and when being play by player device, effect lacks telepresenc.Meanwhile, for the audio frequency of the multichannel stereo-circulation sound forms such as 5.1 sound channels, most TV and computer can only play out the audio of common double channel stereo, only have the telepresenc just being experienced stereo-circulation sound by the home theater of costliness.

Current most virtual surround sound method for reconstructing mainly comprises two steps:

1) rebuild out by the loud speaker in people front according to the surround sound of number of people correlation function by multi-channel format such as 5.1 sound channels.Because the sound source of people to front and back mirror position is insensitive, therefore in order to expand surround sound audition scope, virtual surround sound sound source is fixed on the left and right sides of people.In order to eliminate the cross-talk between loud speaker, need to add Cross-talk cancellation algorithm.

2) synchronously drive loud speaker by hardware device, build the telepresenc of virtual surround sound.

There is following shortcoming in existing virtual surround sound method for reconstructing:

1) only carry out surround sound reconstruction for self with regard to the multi-channel format comprising surround sound sound channel, the audio of common double channel stereo can not improve.

2) need to ensure the synchronous of each sound channel by extra hardware device more than the playback system of two loud speakers, price comparison is expensive.

Summary of the invention

The invention provides the low voice speaking construction method of stereo-circulation and device, to improve the audio of the stereo-circulation sound of reconstruction.

Technical scheme of the present invention is achieved in that

The low voice speaking construction method of a kind of stereo-circulation, if total N number of loud speaker, n-th (1<=n<=N) individual loud speaker and N-n+1 loud speaker form loud speaker pair, then form N/2 altogether to loud speaker, the method comprises:

For arbitrary loud speaker n, for loud speaker n selects the audio-source identical with other N-1 loud speaker;

For loud speaker n, according to the virtual preposition audio amplifier conversion factor calculated and virtual surround speaker conversion factor, audio source signal is converted to the pumping signal of stereo-circulation sound, pumping signal is outputted to loud speaker n,

Wherein, described virtual preposition audio amplifier conversion factor by: convert loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and obtain in the superposition acoustic pressure at left and right ear place, described virtual surround speaker conversion factor by: convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and obtain in the superposition acoustic pressure at left and right ear place.

Describedly convert loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;}\\ {P_R}^{\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_{N-n+1}& {\mathrm{\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

$\left[\begin{array}{c}{P}_L\\ P_R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{RL}}\\ H_{\mathrm{LR}}& H_{\mathrm{RR}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

Make P ' _l=P _l

P _R′＝P _R

Wherein, P _l' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after Zuo Erchu conversion, P _r' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after the conversion of auris dextra place, P _lfor virtual preposition audio amplifier is in the superposition acoustic pressure of Zuo Erchu, P _rfor virtual preposition audio amplifier is in the superposition acoustic pressure at auris dextra place; H _nLfor loud speaker n is to the number of people correlation function of left ear, H _nRfor loud speaker n is to the number of people correlation function of auris dextra, H _{(N-n+1) L}for loud speaker N-n+1 is to the number of people correlation function of left ear, H _{(N-n+1) R}for loud speaker N-n+1 is to the number of people correlation function of auris dextra, H _lLfor virtual preposition left voice box is to the number of people correlation function of left ear, H _lRfor virtual preposition left voice box is to the number of people correlation function of auris dextra, H _rLfor virtual preposition right voice box is to the number of people correlation function of left ear, H _rRfor virtual preposition right voice box is to the number of people correlation function of auris dextra, L is the left channel signals of audio-source, and R is the right-channel signals of audio-source, μ _nfor the first virtual preposition audio amplifier conversion factor of loud speaker n, ν _nfor the second virtual preposition audio amplifier conversion factor of loud speaker n, μ _n-n+1for the first virtual preposition audio amplifier conversion factor of loud speaker N-n+1, ν _n-n+1for the second virtual preposition audio amplifier conversion factor of loud speaker N-n+1;

Describedly convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_{N-n+1}& {\mathrm{\&alpha;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{RSL}}\\ H_{\mathrm{LSR}}& H_{\mathrm{RSR}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

Make P ' ' ' _l=P _l' '

P _R′′′＝P _R′′

Wherein, P ' ' ' _lfor loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after Zuo Erchu conversion, P _r' ' ' for loud speaker n and loud speaker N-n+1 for virtual surround speaker auris dextra place conversion after superposition acoustic pressure, P _l" for virtual surround speaker is in the superposition acoustic pressure of Zuo Erchu, P _r" for virtual surround speaker is in the superposition acoustic pressure at auris dextra place, H _lSLfor virtual ring is around the number of people correlation function of left voice box to left ear, H _lSRfor virtual ring is around the number of people correlation function of left voice box to auris dextra, H _rSLfor virtual ring is around the number of people correlation function of right voice box to left ear, H _rSRfor virtual ring is around the number of people correlation function of right voice box to auris dextra, LS is the L channel surround sound signal of audio-source, and RS is the R channel surround sound signal of audio-source, α _nfor the first virtual surround speaker conversion factor of loud speaker n, β _nfor the second virtual surround speaker conversion factor of loud speaker n, α _n-n+1for the first virtual surround speaker conversion factor of loud speaker N-n+1, β _n-n+1for the second virtual surround speaker conversion factor of loud speaker N-n+1.

Described pumping signal is:

Y _n'＝μ _n*L+ν _n*R+0.707C+α _n*LS+β _n*RS，

Wherein, Y _n' for outputting to the pumping signal of loud speaker n, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

Described N number of loud speaker centered by hearer between two symmetry put.

When described N number of loud speaker centered by hearer, put between two by symmetry, described pumping signal is:

${Y_n}^{\&prime;}=\frac{1}{\sqrt{{\left|{\mathrm{\&mu;}}_n\right|}^2+{\left|v_n\right|}^2}}({\mathrm{\&mu;}}_n*L+v_n*R)+0.707C+\frac{1}{\sqrt{{\left|{\mathrm{\&alpha;}}_n\right|}^2+{\left|{\mathrm{\&beta;}}_n\right|}^2}}({\mathrm{\&alpha;}}_n*\mathrm{LS}+{\mathrm{\&beta;}}_n*\mathrm{RS})$

Wherein, Y _n' for outputting to the pumping signal of loud speaker n, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

When described N is odd number, the pumping signal outputting to loud speaker (N+1)/2 is identical with the center channels signal of audio-source.

When described audio-source is stereophony,

The L channel surround sound signal LS of described audio-source obtains in the following manner:

Using L as desired signal, R, as input signal, carries out decorrelative transformation, obtains the surround sound signal LS of L channel;

The R channel surround sound signal RS of described audio-source obtains in the following manner:

Using R as desired signal, L, as input signal, carries out decorrelative transformation, obtains the surround sound signal RS of R channel.

Described virtual surround sound is 5.1 sound channels or 7.1 sound channel stereo-circulation sound.

The player at described N number of loud speaker place is undertaken interconnected by local network LAN or WLAN (wireless local area network) WLAN mode, and arrange wherein a player be master control player;

And, comprise further for after the audio-source that loud speaker n selection is identical with other N-1 loud speaker:

Each non-master control player connects with master control player respectively, receives the initial broadcasting clock T1 that master control player is sent;

And, describedly this pumping signal outputted to loud speaker n comprise:

According to the difference of current system time clock T2 with initial broadcasting clock T1: the timestamp PTS of T2-T1 and origination audio frame starts pumping signal corresponding to synchronism output origination audio frame to loud speaker n; Receive the T2 of the renewal that master control player is periodically sent, pumping signal corresponding to the timestamp PTS synchronism output current audio frame of the difference according to current T2 and T1: T2-T1 and current audio frame is to loud speaker n.

Comprise further after the T1 of the renewal that described reception master control player is periodically sent:

If whether T2 – T1>PTS+a sets up, after if so, waiting for (a-1) chronomere, then export pumping signal corresponding to current audio frame to loud speaker n, wherein, a is preset value;

If PTS>T2 – is T1+a, then to master control player transmitting system clock adjustment value: PTS – (T2 – T1), so that current system time clock is reduced to T2 – (PTS – (T2 – T1)) from T2 by master control player.

A kind of stereo-circulation sound reconstructing device, be connected with loud speaker n (1<=n<=N), and loud speaker n and loud speaker N-n+1 forms loud speaker pair, wherein, N is the sum of loud speaker, and this device comprises:

Audio-source selects module: for loud speaker n selects the audio-source identical with other N-1 loud speaker, audio source signal is outputted to pumping signal computing module;

Pumping signal computing module: for loud speaker n, according to the virtual preposition audio amplifier conversion factor calculated and virtual surround speaker conversion factor, audio source signal is converted to the pumping signal of stereo-circulation sound, this pumping signal is outputted to loud speaker n, wherein, described virtual preposition audio amplifier conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual preposition audio amplifier on a left side, the superposition acoustic pressure at auris dextra place obtains, described virtual surround speaker conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual surround speaker on a left side, the superposition acoustic pressure at auris dextra place obtains.

Described pumping signal computing module converts loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place:

$\left[\begin{array}{c}{P_L}^{\&prime;}\\ {P_R}^{\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_{N-n+1}& {\mathrm{\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

$\left[\begin{array}{c}{P}_L\\ P_R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{RL}}\\ H_{\mathrm{LR}}& H_{\mathrm{RR}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

Make P ' _l=P _l

P _R′＝P _R

Wherein, P _l' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after Zuo Erchu conversion, P _r' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after the conversion of auris dextra place, P _lfor virtual preposition audio amplifier is in the superposition acoustic pressure of Zuo Erchu, P _rfor virtual preposition audio amplifier is in the superposition acoustic pressure at auris dextra place; H _nLfor loud speaker n is to the number of people correlation function of left ear, H _nRfor loud speaker n is to the number of people correlation function of auris dextra, H _{(N-n+1) L}for loud speaker N-n+1 is to the number of people correlation function of left ear, H _{(N-n+1) R}for loud speaker N-n+1 is to the number of people correlation function of auris dextra, H _lLfor virtual preposition left voice box is to the number of people correlation function of left ear, H _lRfor virtual preposition left voice box is to the number of people correlation function of auris dextra, H _rLfor virtual preposition right voice box is to the number of people correlation function of left ear, H _rRfor virtual preposition right voice box is to the number of people correlation function of auris dextra, L is the left channel signals of audio-source, and R is the right-channel signals of audio-source, μ _nfor the first virtual preposition audio amplifier conversion factor of loud speaker n, ν _nfor the second virtual preposition audio amplifier conversion factor of loud speaker n, μ _n-n+1for the first virtual preposition audio amplifier conversion factor of loud speaker N-n+1, ν _n-n+1for the second virtual preposition audio amplifier conversion factor of loud speaker N-n+1;

Describedly convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_{N-n+1}& {\mathrm{\&alpha;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{RSL}}\\ H_{\mathrm{LSR}}& H_{\mathrm{RSR}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

Make P ' ' ' _l=P _l' '

P _R′′′＝P _R′′

Wherein, P ' ' ' _lfor loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after Zuo Erchu conversion, P _r' ' ' for loud speaker n and loud speaker N-n+1 for virtual surround speaker auris dextra place conversion after superposition acoustic pressure, P _l" for virtual surround speaker is in the superposition acoustic pressure of Zuo Erchu, P _r" for virtual surround speaker is in the superposition acoustic pressure at auris dextra place, H _lSLfor virtual ring is around the number of people correlation function of left voice box to left ear, H _lSRfor virtual ring is around the number of people correlation function of left voice box to auris dextra, H _rSLfor virtual ring is around the number of people correlation function of right voice box to left ear, H _rSRfor virtual ring is around the number of people correlation function of right voice box to auris dextra, LS is the L channel surround sound signal of audio-source, and RS is the R channel surround sound signal of audio-source, α _nfor the first virtual surround speaker conversion factor of loud speaker n, β _nfor the second virtual surround speaker conversion factor of loud speaker n, α _n-n+1for the first virtual surround speaker conversion factor of loud speaker N-n+1, β _n-n+1for the second virtual surround speaker conversion factor of loud speaker N-n+1.

The pumping signal that described pumping signal computing module outputs to loud speaker is:

Y _n'＝μ _n*L+ν _n*R+0.707C+α _n*LS+β _n*RS，

Wherein, Y _n' for outputting to the pumping signal of loud speaker, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

Described N number of loud speaker centered by hearer between two symmetry put.

When described N number of loud speaker centered by hearer, put between two by symmetry, the pumping signal that described pumping signal computing module outputs to loud speaker is:

${Y_n}^{\&prime;}=\frac{1}{\sqrt{{\left|{\mathrm{\&mu;}}_n\right|}^2+{\left|v_n\right|}^2}}({\mathrm{\&mu;}}_n*L+v_n*R)+0.707C+\frac{1}{\sqrt{{\left|{\mathrm{\&alpha;}}_n\right|}^2+{\left|{\mathrm{\&beta;}}_n\right|}^2}}({\mathrm{\&alpha;}}_n*\mathrm{LS}+{\mathrm{\&beta;}}_n*\mathrm{RS}),$

Wherein, Y _n' for outputting to the pumping signal of loud speaker, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

When described N is odd number, the pumping signal that described pumping signal computing module outputs to loud speaker (N+1)/2 is identical with the center channels signal of audio-source.

When described audio-source is stereophony,

Described pumping signal computing module obtains left and right sound channels surround sound signal LS, RS of audio-source in the following manner:

Using L as desired signal, R, as input signal, carries out decorrelative transformation, obtains the surround sound signal LS of L channel;

Using R as desired signal, L, as input signal, carries out decorrelative transformation, obtains the surround sound signal RS of R channel.

Described virtual surround sound is 5.1 sound channels or 7.1 sound channel stereo-circulation sound.

The player at described N number of loud speaker place is undertaken interconnected by LAN or WLAN mode, and arrange wherein a player be master control player;

Described device comprises synchronous playing module further, for after have selected the audio-source identical with other N-1 loud speaker for loud speaker n, connect with master control player, receive the initial broadcasting clock T1 that master control player is sent, receive the pumping signal that pumping signal computing module exports, the timestamp PTS of the difference according to current system time clock T2 and T1: T2-T1 and origination audio frame starts to pumping signal corresponding to loud speaker n synchronism output origination audio frame; And receive the T2 of the renewal that master control player is periodically sent, the timestamp PTS of the difference according to current T2 and T1: T2-T1 and current audio frame is to pumping signal corresponding to loud speaker n synchronism output current audio frame.

Described synchronous playing module comprises after receiving the T1 of the renewal that master control player is periodically sent further:

If whether T2 – T1>PTS+a sets up, after if so, waiting for (a-1) chronomere, then export pumping signal corresponding to current audio frame to loud speaker n, wherein, a is preset value;

If PTS>T2 – is T1+a, then to master control player transmitting system clock adjustment value: PTS – (T2 – T1), so that current system time clock is reduced to T2 – (PTS – (T2 – T1)) from T2 by master control player.

Visible, the present invention is applicable to the audio-source of any audio format, and does not limit the putting position of player, just can reach the result of broadcast of stereo-circulation sound.

Accompanying drawing explanation

The low voice speaking construction method flow chart of stereo-circulation that Fig. 1 provides for the embodiment of the present invention;

The low voice speaking construction method flow chart of stereo-circulation that Fig. 2 provides for further embodiment of this invention;

What Fig. 3 provided for the embodiment of the present invention realizes the method flow diagram that N/2 player synchronously play;

The composition schematic diagram of the stereo-circulation sound reconstructing device that Fig. 4 provides for the embodiment of the present invention.

Embodiment

Below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.

The low voice speaking construction method flow chart of stereo-circulation that Fig. 1 provides for the embodiment of the present invention, as shown in Figure 1, its concrete steps are as follows:

Step 100: establish a total N/2 player, N is even number, each player there are two loud speakers, if player is numbered 1 ~ N/2, corresponding loud speaker is numbered 1 ~ N, and establish n-th (1<=n<=N) individual loud speaker and N-n+1 loud speaker to form loud speaker pair, then form N/2 altogether to loud speaker.

Step 101: for arbitrary player, the audio-source identical with other N/2-1 player selected by this player.

Here " audio-source " not only for the audio stream only comprising voice data, also for the Media Stream comprising sound, video data simultaneously.

Step 102: player is according to the virtual preposition audio amplifier conversion factor calculated and virtual surround speaker conversion factor, audio source signal is converted to the pumping signal of stereo-circulation sound, pumping signal is outputted to the loud speaker n of self, wherein, described virtual preposition audio amplifier conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual preposition audio amplifier on a left side, the superposition acoustic pressure at auris dextra place obtains, described virtual surround speaker conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual surround speaker on a left side, the superposition acoustic pressure at auris dextra place obtains.

Describedly convert loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;}\\ {P_R}^{\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_{N-n+1}& {\mathrm{\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

$\left[\begin{array}{c}{P}_L\\ P_R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{RL}}\\ H_{\mathrm{LR}}& H_{\mathrm{RR}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

Make P ' _l=P _l

P _R′＝P _R

Wherein, P _l' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after Zuo Erchu conversion, P _r' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after the conversion of auris dextra place, P _lfor virtual preposition audio amplifier is in the superposition acoustic pressure of Zuo Erchu, P _rfor virtual preposition audio amplifier is in the superposition acoustic pressure at auris dextra place; H _nLfor loud speaker n is to the number of people correlation function of left ear, H _nRfor loud speaker n is to the number of people correlation function of auris dextra, H _{(N-n+1) L}for loud speaker N-n+1 is to the number of people correlation function of left ear, H _{(N-n+1) R}for loud speaker N-n+1 is to the number of people correlation function of auris dextra, H _lLfor virtual preposition left voice box is to the number of people correlation function of left ear, H _lRfor virtual preposition left voice box is to the number of people correlation function of auris dextra, H _rLfor virtual preposition right voice box is to the number of people correlation function of left ear, H _rRfor virtual preposition right voice box is to the number of people correlation function of auris dextra, L is the left channel signals of audio-source, and R is the right-channel signals of audio-source, μ _nfor the first virtual preposition audio amplifier conversion factor of loud speaker n, ν _nfor the second virtual preposition audio amplifier conversion factor of loud speaker n, μ _n-n+1for the first virtual preposition audio amplifier conversion factor of loud speaker N-n+1, ν _n-n+1for the second virtual preposition audio amplifier conversion factor of loud speaker N-n+1;

Describedly convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_{N-n+1}& {\mathrm{\&alpha;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{RSL}}\\ H_{\mathrm{LSR}}& H_{\mathrm{RSR}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

Make P ' ' ' _l=P _l' '

P _R′′′＝P _R′′

Wherein, P ' ' ' _lfor loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after Zuo Erchu conversion, P _r' ' ' for loud speaker n and loud speaker N-n+1 for virtual surround speaker auris dextra place conversion after superposition acoustic pressure, P _l" for virtual surround speaker is in the superposition acoustic pressure of Zuo Erchu, P _r" for virtual surround speaker is in the superposition acoustic pressure at auris dextra place, H _lSLfor virtual ring is around the number of people correlation function of left voice box to left ear, H _lSRfor virtual ring is around the number of people correlation function of left voice box to auris dextra, H _rSLfor virtual ring is around the number of people correlation function of right voice box to left ear, H _rSRfor virtual ring is around the number of people correlation function of right voice box to auris dextra, LS is the L channel surround sound signal of audio-source, and RS is the R channel surround sound signal of audio-source, α _nfor the first virtual surround speaker conversion factor of loud speaker n, β _nfor the second virtual surround speaker conversion factor of loud speaker n, α _n-n+1for the first virtual surround speaker conversion factor of loud speaker N-n+1, β _n-n+1for the second virtual surround speaker conversion factor of loud speaker N-n+1.

Described pumping signal is:

Y _n'＝μ _n*L+ν _n*R+0.707C+α _n*LS+β _n*RS，

Wherein, Y _n' for outputting to the pumping signal of loud speaker n, C is the center channels signal of audio-source, wherein:

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

In actual applications, described N number of loud speaker can centered by hearer between two symmetry put.

In actual applications, consider and prevent tone quality distortion, when N number of loud speaker centered by hearer, put between two by symmetry, can by Y _n' be optimized for:

${Y_n}^{\&prime;}=\frac{1}{\sqrt{{\left|{\mathrm{\&mu;}}_n\right|}^2+{\left|v_n\right|}^2}}({\mathrm{\&mu;}}_n*L+v_n*R)+0.707C+\frac{1}{\sqrt{{\left|{\mathrm{\&alpha;}}_n\right|}^2+{\left|{\mathrm{\&beta;}}_n\right|}^2}}({\mathrm{\&alpha;}}_n*\mathrm{LS}+{\mathrm{\&beta;}}_n*\mathrm{RS})$

When described audio-source is stereophony,

The L channel surround sound signal LS of described audio-source can obtain in the following manner:

Using L as desired signal, R, as input signal, carries out decorrelative transformation, obtains the surround sound signal LS of L channel, such as: carry out adaptive-filtering, using the surround sound signal LS of error signal as L channel;

The R channel surround sound signal RS of described audio-source can obtain in the following manner:

Using R as desired signal, L, as input signal, carries out decorrelative transformation, obtains the surround sound signal RS of R channel, such as: carry out adaptive-filtering, using the surround sound signal RS of error signal as R channel;

The center channels signal of audio-source

In actual applications, N also can be odd number, and now, loud speaker (N+1)/2 is received separately on a player, and the pumping signal outputting to loud speaker (N+1)/2 is identical with the center channels signal C of audio-source.

In the present invention, the form of audio-source is not restricted.If only comprise the part signal in L, R, LS, RS, C in original audio source, then can calculate remainder signal according to this part signal, specifically how calculating is all prior art, and the present invention repeats no more.

In addition, because de-correlation has a lot of ripe algorithm in the prior art, therefore, one is chosen arbitrarily here.

Described virtual surround sound can be any audio format, as: can be 5.1 sound channels or 7.1 sound channel stereo-circulation sound.

The low voice speaking construction method flow chart of stereo-circulation that Fig. 2 provides for further embodiment of this invention, as shown in Figure 2, its concrete steps are as follows:

Step 200: establish a total N/2 player, N is even number, if player is numbered 1 ~ N/2, corresponding loud speaker is numbered 1 ~ N, and establish n-th (1<=n<=N) individual loud speaker and N-n+1 loud speaker left and right symmetry centered by hearer, composition loud speaker pair, then form N/2 altogether to loud speaker, can be obtained: H by symmetry _nL=H _{(N-n+1) R}; If the stereo-circulation sound rebuild is 5.1 sound channel stereo-circulation sound, the number of people related transfer function of its two preposition audio amplifier is respectively (H _lL, H _lR), (H _rL, H _rR), the number of people related transfer function of two surround speakers is respectively (H _lSL, H _lSR), (H _rSL, H _rSR), can be obtained by symmetry equally: H _lL=H _rR, H _lR=H _rL, H _lSL=H _rSL, H _lSR=H _rSL.

Step 201: for arbitrary player, the audio-source identical with other N/2-1 player selected by this player.

Step 202: for current audio signals, player converts the loud speaker n of self and corresponding loud speaker N-n+1 the superposition acoustic pressure of virtual preposition audio amplifier at left and right ear place in the superposition acoustic pressure at left and right ear place, obtains first and second virtual surround speaker conversion factor.That is:

$\left[\begin{array}{c}{P_L}^{\&prime;}\\ {P_R}^{\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_{N-n+1}& {\mathrm{\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{\mathrm{nR}}\\ H_{\mathrm{nR}}& H_{\mathrm{nL}}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_n& {\mathrm{\&mu;}}_n\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

$\left[\begin{array}{c}{P}_L\\ P_R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{RL}}\\ H_{\mathrm{LR}}& H_{\mathrm{RR}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{LR}}\\ H_{\mathrm{LR}}& H_{\mathrm{LL}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

Make P ' _l=P _l

P _R′＝P _R

Obtain:

${\mathrm{\&mu;}}_n=\frac{H_{\mathrm{nL}}{H}_{\mathrm{LL}}-H_{\mathrm{nR}}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}^2-H_{\mathrm{nR}}^2}$

$v_n=\frac{H_{\mathrm{nL}}{H}_{\mathrm{LR}}-H_{\mathrm{nR}}{H}_{\mathrm{LL}}}{H_{\mathrm{nL}}^2-H_{\mathrm{nR}}^2}$

Step 203: for current audio signals, player converts the loud speaker n of self and corresponding loud speaker N-n+1 the superposition acoustic pressure of virtual surround speaker at left and right ear place in the superposition acoustic pressure at left and right ear place, obtains first and second virtual surround speaker conversion factor.That is:

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_{N-n+1}& {\mathrm{\&alpha;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{\mathrm{nR}}\\ H_{\mathrm{nR}}& H_{\mathrm{nL}}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_n& {\mathrm{\&alpha;}}_n\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{RSL}}\\ H_{\mathrm{LSR}}& H_{\mathrm{RSR}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{LSR}}\\ H_{\mathrm{LSR}}& H_{\mathrm{LSL}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

Make P ' ' ' _l=P _l' '

P _R′′′＝P _R′′

Obtain:

${\mathrm{\&alpha;}}_n=\frac{H_{\mathrm{nL}}{H}_{\mathrm{LSL}}-H_{\mathrm{nR}}{H}_{\mathrm{LSR}}}{H_{\mathrm{nl}}^2-H_{\mathrm{nR}}^2}$

${\mathrm{\&beta;}}_n=\frac{H_{\mathrm{nL}}{H}_{\mathrm{LSR}}-H_{\mathrm{nR}}{H}_{\mathrm{LSL}}}{H_{\mathrm{nL}}^2-H_{\mathrm{nR}}^2}$

Step 204: calculate the pumping signal outputting to loud speaker n, obtain:

Y _n'＝μ _n*L+ν _n*R+0.707C+α _n*LS+β _n*RS

In actual applications, prevent tone quality distortion if consider, when N number of loud speaker centered by hearer, put between two by symmetry, can by Y _n' be optimized for: ${Y_n}^{\&prime;}=\frac{1}{\sqrt{{\left|{\mathrm{\&mu;}}_n\right|}^2+{\left|v_n\right|}^2}}({\mathrm{\&mu;}}_n*L+v_n*R)+0.707C+\frac{1}{\sqrt{{\left|{\mathrm{\&alpha;}}_n\right|}^2+{\left|{\mathrm{\&beta;}}_n\right|}^2}}({\mathrm{\&alpha;}}_n*\mathrm{LS}+{\mathrm{\&beta;}}_n*\mathrm{RS})$

Step 205: pumping signal is outputted to self loud speaker n by player.

Each player has two loud speakers, the process only gived for a loud speaker n embodiment illustrated in fig. 2, the processing procedure for another one loud speaker is identical.

Synchronous broadcasting must be reached for N/2 player, just can reach best stereo-circulation sound result of broadcast.

What Fig. 3 provided for the embodiment of the present invention realizes the method flow diagram that N/2 player synchronously play, and as shown in Figure 3, its concrete steps are as follows:

Step 301:N/2 player by LAN(Local Area Network, local area network (LAN)) or WLAN(Wireless Local Area Network, WLAN (wireless local area network)) mode carries out interconnected, arranging a wherein player is master control player; Configuration synchronization playback parameter on each player: 1, the IP address of master control player and port; 2, the player number N/2 of synchronized playback.

Step 302: when each player have selected identical audio plays source, first master control player starts synchronized playback control module.

Step 303: the synchronized playback control module of each player and master control player sets up TCP(Transmission Control Protocol, transmission control protocol) connect.

Step 304: the synchronized playback control module of master control player finds that setting up TCP with all players is connected, then by UDP(User Datagram Protocol, User Datagram Protoco (UDP)) multicast provides unified initial broadcasting clock T1 to all players, then, upgrade primary system clock T2 every 1ms and send to all players.

Step 305: the pumping signal that each player utilizes current system time clock T2 corresponding to current audio frame with the initial difference T2 – T1 of broadcasting clock T1 and the timestamp PTS of audio frame carries out synchronized playback.

Wherein, if T2 – is T1>PTS+a, then after (a-1) ms waited for by player, then export pumping signal corresponding to current audio frame; If PTS>T2 – is T1+a, then player is to synchronized playback control module transmitting system adjusted value: PTS – (T2 – T1), current system time clock can be reduced to T2 – (PTS – (T2 – T1)) from T2 by synchronized playback control module, current system time clock is made to be synchronized on the timestamp of the audio frame of current broadcasting, delay between each like this player synchronized playback controls all the time within a ms, and a can rule of thumb set.

The composition schematic diagram of the stereo-circulation sound reconstructing device that Fig. 4 provides for the embodiment of the present invention, this device is connected with loud speaker n (1<=n<=N), and loud speaker n and loud speaker N-n+1 forms loud speaker pair, wherein, N is the sum of loud speaker, as shown in Figure 4, this device comprises: audio-source selects module 41, pumping signal computing module 42 and synchronous playing module 43, wherein:

Audio-source selects module 41: for loud speaker n selects the audio-source identical with other N-1 loud speaker, audio source signal is outputted to pumping signal computing module 42.

Pumping signal computing module 42: for loud speaker n, according to the virtual preposition audio amplifier conversion factor calculated and virtual surround speaker conversion factor, audio source signal audio-source being selected module 41 to export converts the pumping signal of stereo-circulation sound to, this pumping signal is outputted to synchronous playing module 43, wherein, described virtual preposition audio amplifier conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual preposition audio amplifier on a left side, the superposition acoustic pressure at auris dextra place obtains, described virtual surround speaker conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual surround speaker on a left side, the superposition acoustic pressure at auris dextra place obtains.

Synchronous playing module 43: receive the pumping signal exported from pumping signal computing module 42, with this pumping signal of player synchronism output at other loud speaker places to loud speaker n.

Wherein, pumping signal computing module 42 converts loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place is:

$\left[\begin{array}{c}{P_L}^{\&prime;}\\ {P_R}^{\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_{N-n+1}& {\mathrm{\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

$\left[\begin{array}{c}{P}_L\\ P_R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{RL}}\\ H_{\mathrm{LR}}& H_{\mathrm{RR}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

Make P ' _l=P _l

P _R′＝P _R

Wherein, P _l' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after Zuo Erchu conversion, P _r' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after the conversion of auris dextra place, P _lfor virtual preposition audio amplifier is in the superposition acoustic pressure of Zuo Erchu, P _rfor virtual preposition audio amplifier is in the superposition acoustic pressure at auris dextra place; H _nLfor loud speaker n is to the number of people correlation function of left ear, H _nRfor loud speaker n is to the number of people correlation function of auris dextra, H _{(N-n+1) L}for loud speaker N-n+1 is to the number of people correlation function of left ear, H _{(N-n+1) R}for loud speaker N-n+1 is to the number of people correlation function of auris dextra, H _lLfor virtual preposition left voice box is to the number of people correlation function of left ear, H _lRfor virtual preposition left voice box is to the number of people correlation function of auris dextra, H _rLfor virtual preposition right voice box is to the number of people correlation function of left ear, H _rRfor virtual preposition right voice box is to the number of people correlation function of auris dextra, L is the left channel signals of audio-source, and R is the right-channel signals of audio-source, μ _nfor the first virtual preposition audio amplifier conversion factor of loud speaker n, ν _nfor the second virtual preposition audio amplifier conversion factor of loud speaker n, μ _n-n+1for the first virtual preposition audio amplifier conversion factor of loud speaker N-n+1, ν _n-n+1for the second virtual preposition audio amplifier conversion factor of loud speaker N-n+1;

Describedly convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_{N-n+1}& {\mathrm{\&alpha;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{RSL}}\\ H_{\mathrm{LSR}}& H_{\mathrm{RSR}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

Make P ' ' ' _l=P _l' '

P _R′′′＝P _R′′

Wherein, P ' ' ' _lfor loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after Zuo Erchu conversion, P _r' ' ' for loud speaker n and loud speaker N-n+1 for virtual surround speaker auris dextra place conversion after superposition acoustic pressure, P _l" for virtual surround speaker is in the superposition acoustic pressure of Zuo Erchu, P _r" for virtual surround speaker is in the superposition acoustic pressure at auris dextra place, H _lSLfor virtual ring is around the number of people correlation function of left voice box to left ear, H _lSRfor virtual ring is around the number of people correlation function of left voice box to auris dextra, H _rSLfor virtual ring is around the number of people correlation function of right voice box to left ear, H _rSRfor virtual ring is around the number of people correlation function of right voice box to auris dextra, LS is the L channel surround sound signal of audio-source, and RS is the R channel surround sound signal of audio-source, α _nfor the first virtual surround speaker conversion factor of loud speaker n, β _nfor the second virtual surround speaker conversion factor of loud speaker n, α _n-n+1for the first virtual surround speaker conversion factor of loud speaker N-n+1, β _n-n+1for the second virtual surround speaker conversion factor of loud speaker N-n+1.

Wherein, pumping signal computing module 42 outputs to the pumping signal of loud speaker and is:

Y _n'＝μ _n*L+ν _n*R+0.707C+α _n*LS+β _n*RS，

Wherein, Y _n' for outputting to the pumping signal of loud speaker, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

Wherein, N number of loud speaker can centered by hearer between two symmetry put.

Wherein, when N number of loud speaker centered by hearer, put between two by symmetry, for preventing tone quality distortion, the pumping signal that pumping signal computing module 42 outputs to loud speaker can be optimized for:

${Y_n}^{\&prime;}=\frac{1}{\sqrt{{\left|{\mathrm{\&mu;}}_n\right|}^2+{\left|v_n\right|}^2}}({\mathrm{\&mu;}}_n*L+v_n*R)+0.707C+\frac{1}{\sqrt{{\left|{\mathrm{\&alpha;}}_n\right|}^2+{\left|{\mathrm{\&beta;}}_n\right|}^2}}({\mathrm{\&alpha;}}_n*\mathrm{LS}+{\mathrm{\&beta;}}_n*\mathrm{RS}),$

Wherein, Y _n' for outputting to the pumping signal of loud speaker, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

In actual applications, N can be even number, can be also odd number, and when for odd number, loud speaker (N+1)/2 is received separately on a player, and the pumping signal outputting to loud speaker (N+1)/2 is identical with the center channels signal C of audio-source.

Wherein, when described audio-source is stereophony,

Pumping signal computing module 42 can obtain left and right sound channels surround sound signal LS, RS of audio-source in the following manner:

Using L as desired signal, R, as input signal, carries out decorrelative transformation, obtains the surround sound signal LS of L channel;

Using R as desired signal, L, as input signal, carries out decorrelative transformation, obtains the surround sound signal RS of R channel.

Wherein, described virtual surround sound can be 5.1 sound channels or 7.1 sound channel stereo-circulation sound.

Wherein, the player at N number of loud speaker place is undertaken interconnected by LAN or WLAN mode, and arrange wherein a player be master control player;

Described synchronous playing module 43 is further used for, after the loud speaker for self have selected the audio-source identical with other loud speakers, connect with master control player, receive the initial broadcasting clock T1 that master control player is sent, the timestamp PTS of the difference according to current system time clock T2 and T1: T2-T1 and origination audio frame starts pumping signal corresponding to synchronism output origination audio frame to self loud speaker;

And receive the T2 of the renewal that master control player is periodically sent, pumping signal corresponding to the timestamp PTS synchronism output current audio frame of the difference according to current T2 and T1: T2-T1 and current audio frame is to the loud speaker of self.

Wherein, synchronous playing module 43 comprises after receiving the T1 of the renewal that master control player is periodically sent further:

If whether T2 – T1>PTS+a sets up, after if so, waiting for (a-1) chronomere, then export pumping signal corresponding to current audio frame to self loud speaker;

If PTS>T2 – is T1+a, then to master control player transmitting system clock adjustment value: PTS – (T2 – T1), so that current system time clock is reduced to T2 – (PTS – (T2 – T1)) from T2 by master control player.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (20)

1. the low voice speaking construction method of stereo-circulation, is characterized in that, if total N number of loud speaker, n-th loud speaker and N-n+1 loud speaker form loud speaker pair, wherein, and 1<=n<=N, then form N/2 altogether to loud speaker, the method comprises:

For arbitrary loud speaker n, for loud speaker n selects the audio-source identical with other N-1 loud speaker;

For loud speaker n, according to the virtual preposition audio amplifier conversion factor calculated and virtual surround speaker conversion factor, audio source signal is converted to the pumping signal of stereo-circulation sound, pumping signal is outputted to loud speaker n,

Wherein, described virtual preposition audio amplifier conversion factor by: convert loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and obtain in the superposition acoustic pressure at left and right ear place, described virtual surround speaker conversion factor by: convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and obtain in the superposition acoustic pressure at left and right ear place.

2. method according to claim 1, is characterized in that, describedly converts loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place is:

$\left[\begin{array}{c}{P_L}^{\&prime;}\\ {P_R}^{\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_{N-n+1}& {\mathrm{\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

$\left[\begin{array}{c}{P}_L\\ P_R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{RL}}\\ H_{\mathrm{LR}}& G_{\mathrm{RR}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

Order $\begin{array}{c}{P}_L^{\&prime;}=P_L\\ P_R^{\&prime;}=P_R\end{array}$

Wherein, P _l' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after Zuo Erchu conversion, P _r' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after the conversion of auris dextra place, P _lfor virtual preposition audio amplifier is in the superposition acoustic pressure of Zuo Erchu, P _rfor virtual preposition audio amplifier is in the superposition acoustic pressure at auris dextra place; H _nLfor loud speaker n is to the number of people correlation function of left ear, H _nRfor loud speaker n is to the number of people correlation function of auris dextra, H _{(N-n+1) L}for loud speaker N-n+1 is to the number of people correlation function of left ear, H _{(N-n+1) R}for loud speaker N-n+1 is to the number of people correlation function of auris dextra, H _lLfor virtual preposition left voice box is to the number of people correlation function of left ear, H _lRfor virtual preposition left voice box is to the number of people correlation function of auris dextra, H _rLfor virtual preposition right voice box is to the number of people correlation function of left ear, H _rRfor virtual preposition right voice box is to the number of people correlation function of auris dextra, L is the left channel signals of audio-source, and R is the right-channel signals of audio-source, μ _nfor the first virtual preposition audio amplifier conversion factor of loud speaker n, ν _nfor the second virtual preposition audio amplifier conversion factor of loud speaker n, μ _n-n+1for the first virtual preposition audio amplifier conversion factor of loud speaker N-n+1, ν _n-n+1for the second virtual preposition audio amplifier conversion factor of loud speaker N-n+1;

Describedly convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_{N-n+1}& {\mathrm{\&alpha;\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{RSL}}\\ H_{\mathrm{LSR}}& G_{\mathrm{RSR}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

Order $\begin{array}{c}{P}_L^{\&prime;\&prime;\&prime;}={P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}={P_R}^{\&prime;\&prime;}\end{array}$

Wherein, P " ' _lfor loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after Zuo Erchu conversion, P _r" ' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after the conversion of auris dextra place, P _l" for virtual surround speaker is in the superposition acoustic pressure of Zuo Erchu, P _r" for virtual surround speaker is in the superposition acoustic pressure at auris dextra place, H _lSLfor virtual ring is around the number of people correlation function of left voice box to left ear, H _lSRfor virtual ring is around the number of people correlation function of left voice box to auris dextra, H _rSLfor virtual ring is around the number of people correlation function of right voice box to left ear, H _rSRfor virtual ring is around the number of people correlation function of right voice box to auris dextra, LS is the L channel surround sound signal of audio-source, and RS is the R channel surround sound signal of audio-source, α _nfor the first virtual surround speaker conversion factor of loud speaker n, β _nfor the second virtual surround speaker conversion factor of loud speaker n, α _n-n+1for the first virtual surround speaker conversion factor of loud speaker N-n+1, β _n-n+1for the second virtual surround speaker conversion factor of loud speaker N-n+1.

3. method according to claim 2, is characterized in that, described pumping signal is:

Y _n'＝μ _n*L+ν _n*R+0.707C+α _n*LS+β _n*RS，

Wherein, Y _n' for outputting to the pumping signal of loud speaker n, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

4. according to the arbitrary described method of claims 1 to 3, described N number of loud speaker centered by hearer between two symmetry put.

5. method according to claim 2, is characterized in that, when described N number of loud speaker centered by hearer, put between two by symmetry, described pumping signal is:

${Y_n}^{\&prime;}=\frac{1}{\sqrt{{\left|{\mathrm{\&mu;}}_n\right|}^2+{\left|v_n\right|}^2}}({\mathrm{\&mu;}}_n*L+v_n*R)+0.707C+\frac{1}{\sqrt{{\left|{\mathrm{\&alpha;}}_n\right|}^2+{\left|{\mathrm{\&beta;}}_n\right|}^2}}({\mathrm{\&alpha;}}_n*\mathrm{LS}+{\mathrm{\&beta;}}_n*\mathrm{RS})$

Wherein, Y _n' for outputting to the pumping signal of loud speaker n, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

6., according to the arbitrary described method of claim 2,3 or 5, it is characterized in that, when described N is odd number, the pumping signal outputting to loud speaker (N+1)/2 is identical with the center channels signal of audio-source.

7., according to the arbitrary described method of claim 2,3 or 5, it is characterized in that, when described audio-source is stereophony,

The L channel surround sound signal LS of described audio-source obtains in the following manner:

Using L as desired signal, R, as input signal, carries out decorrelative transformation, obtains the surround sound signal LS of L channel;

The R channel surround sound signal RS of described audio-source obtains in the following manner:

Using R as desired signal, L, as input signal, carries out decorrelative transformation, obtains the surround sound signal RS of R channel.

8. the method according to claim 1,2,3 or 5, is characterized in that, described stereo-circulation sound is 5.1 sound channels or 7.1 sound channel stereo-circulation sound.

9. the method according to claim 1,2,3 or 5, is characterized in that, the player at described N number of loud speaker place is undertaken interconnected by local network LAN or WLAN (wireless local area network) WLAN mode, and arrange wherein a player be master control player;

And, comprise further for after the audio-source that loud speaker n selection is identical with other N-1 loud speaker:

Each non-master control player connects with master control player respectively, receives the initial broadcasting clock T1 that master control player is sent;

And, describedly this pumping signal outputted to loud speaker n comprise:

According to the difference of current system time clock T2 with initial broadcasting clock T1: the timestamp PTS of T2-T1 and origination audio frame starts pumping signal corresponding to synchronism output origination audio frame to loud speaker n; Receive the T2 of the renewal that master control player is periodically sent, pumping signal corresponding to the timestamp PTS synchronism output current audio frame of the difference according to current T2 and T1: T2-T1 and current audio frame is to loud speaker n.

10. method according to claim 9, is characterized in that, comprises further after the T2 of the renewal that described reception master control player is periodically sent:

If whether the PTS+a of T2 – T1> current audio frame sets up, after if so, waiting for (a-1) chronomere, then export pumping signal corresponding to current audio frame to loud speaker n, wherein, a is preset value;

If the PTS>T2 – T1+a of current audio frame, then to master control player transmitting system clock adjustment value: the PTS – (T2 – T1) of current audio frame, so that current system time clock is reduced to T2 – (the PTS – (T2 – T1) of current audio frame) from T2 by master control player.

11. 1 kinds of stereo-circulation sound reconstructing devices, is characterized in that, be connected with loud speaker n, and loud speaker n and loud speaker N-n+1 forms loud speaker pair, and wherein, 1<=n<=N, N are the sum of loud speaker, and this device comprises:

Audio-source selects module: for loud speaker n selects the audio-source identical with other N-1 loud speaker, audio source signal is outputted to pumping signal computing module;

Pumping signal computing module: for loud speaker n, according to the virtual preposition audio amplifier conversion factor calculated and virtual surround speaker conversion factor, audio source signal is converted to the pumping signal of stereo-circulation sound, this pumping signal is outputted to loud speaker n, wherein, described virtual preposition audio amplifier conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual preposition audio amplifier on a left side, the superposition acoustic pressure at auris dextra place obtains, described virtual surround speaker conversion factor is passed through: by loud speaker n and loud speaker N-n+1 on a left side, the superposition acoustic pressure at auris dextra place converts virtual surround speaker on a left side, the superposition acoustic pressure at auris dextra place obtains.

12. devices according to claim 11, is characterized in that, described pumping signal computing module converts loud speaker n and loud speaker N-n+1 to virtual preposition audio amplifier in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place is:

$\left[\begin{array}{c}{P_L}^{\&prime;}\\ {P_R}^{\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&mu;}}_n& v_n\\ v_{N-n+1}& {\mathrm{\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

$\left[\begin{array}{c}{P}_L\\ P_R\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LL}}& H_{\mathrm{RL}}\\ H_{\mathrm{LR}}& G_{\mathrm{RR}}\end{array}\right]\left[\begin{array}{c}L\\ R\end{array}\right]$

Order $\begin{array}{c}{P}_L^{\&prime;}=P_L\\ {P_R}^{\&prime;}=P_R\end{array}$

Wherein, P _l' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after Zuo Erchu conversion, P _r' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual preposition audio amplifier after the conversion of auris dextra place, P _lfor virtual preposition audio amplifier is in the superposition acoustic pressure of Zuo Erchu, P _rfor virtual preposition audio amplifier is in the superposition acoustic pressure at auris dextra place; H _nLfor loud speaker n is to the number of people correlation function of left ear, H _nRfor loud speaker n is to the number of people correlation function of auris dextra, H _{(N-n+1) L}for loud speaker N-n+1 is to the number of people correlation function of left ear, H _{(N-n+1) R}for loud speaker N-n+1 is to the number of people correlation function of auris dextra, H _lLfor virtual preposition left voice box is to the number of people correlation function of left ear, H _lRfor virtual preposition left voice box is to the number of people correlation function of auris dextra, H _rLfor virtual preposition right voice box is to the number of people correlation function of left ear, H _rRfor virtual preposition right voice box is to the number of people correlation function of auris dextra, L is the left channel signals of audio-source, and R is the right-channel signals of audio-source, μ _nfor the first virtual preposition audio amplifier conversion factor of loud speaker n, ν _nfor the second virtual preposition audio amplifier conversion factor of loud speaker n, μ _n-n+1for the first virtual preposition audio amplifier conversion factor of loud speaker N-n+1, ν _n-n+1for the second virtual preposition audio amplifier conversion factor of loud speaker N-n+1;

Describedly convert loud speaker n and loud speaker N-n+1 to virtual surround speaker in the superposition acoustic pressure at left and right ear place and in the superposition acoustic pressure at left and right ear place be:

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{nL}}& H_{(N-n+1)L}\\ H_{\mathrm{nR}}& H_{(N-n+1)R}\end{array}\right]\left[\begin{array}{cc}{\mathrm{\&alpha;}}_n& {\mathrm{\&beta;}}_n\\ {\mathrm{\&beta;}}_{N-n+1}& {\mathrm{\&alpha;\&mu;}}_{N-n+1}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

$\left[\begin{array}{c}{P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;}\end{array}\right]=\left[\begin{array}{cc}{H}_{\mathrm{LSL}}& H_{\mathrm{RSL}}\\ H_{\mathrm{LSR}}& G_{\mathrm{RSR}}\end{array}\right]\left[\begin{array}{c}\mathrm{LS}\\ \mathrm{RS}\end{array}\right]$

Order $\begin{array}{c}{P}_L^{\&prime;\&prime;\&prime;}={P_L}^{\&prime;\&prime;}\\ {P_R}^{\&prime;\&prime;\&prime;}={P_R}^{\&prime;\&prime;}\end{array}$

Wherein, P " ' _lfor loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after Zuo Erchu conversion, P _r" ' for loud speaker n and loud speaker N-n+1 is for the superposition acoustic pressure of virtual surround speaker after the conversion of auris dextra place, P _l" for virtual surround speaker is in the superposition acoustic pressure of Zuo Erchu, P _r" for virtual surround speaker is in the superposition acoustic pressure at auris dextra place, H _lSLfor virtual ring is around the number of people correlation function of left voice box to left ear, H _lSRfor virtual ring is around the number of people correlation function of left voice box to auris dextra, H _rSLfor virtual ring is around the number of people correlation function of right voice box to left ear, H _rSRfor virtual ring is around the number of people correlation function of right voice box to auris dextra, LS is the L channel surround sound signal of audio-source, and RS is the R channel surround sound signal of audio-source, α _nfor the first virtual surround speaker conversion factor of loud speaker n, β _nfor the second virtual surround speaker conversion factor of loud speaker n, α _n-n+1for the first virtual surround speaker conversion factor of loud speaker N-n+1, β _n-n+1for the second virtual surround speaker conversion factor of loud speaker N-n+1.

13. devices according to claim 12, is characterized in that, the pumping signal that described pumping signal computing module outputs to loud speaker is:

Y _n'＝μ _n*L+ν _n*R+0.707C+α _n*LS+β _n*RS，

Wherein, Y _n' for outputting to the pumping signal of loud speaker, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

14., according to claim 11 to 13 arbitrary described devices, is characterized in that, described N number of loud speaker centered by hearer between two symmetry put.

15. devices according to claim 12, is characterized in that, when described N number of loud speaker centered by hearer, put between two by symmetry, the pumping signal that described pumping signal computing module outputs to loud speaker is:

${Y_n}^{\&prime;}=\frac{1}{\sqrt{{\left|{\mathrm{\&mu;}}_n\right|}^2+{\left|v_n\right|}^2}}({\mathrm{\&mu;}}_n*L+v_n*R)+0.707C+\frac{1}{\sqrt{{\left|{\mathrm{\&alpha;}}_n\right|}^2+{\left|{\mathrm{\&beta;}}_n\right|}^2}}({\mathrm{\&alpha;}}_n*\mathrm{LS}+{\mathrm{\&beta;}}_n*\mathrm{RS})$

Wherein, Y _n' for outputting to the pumping signal of loud speaker, C is the center channels signal of audio-source,

${\mathrm{\&mu;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LL}}-H_{(N-n+1)L}{H}_{\mathrm{LR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

$v_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RL}}-H_{(N-n+1)L}{H}_{\mathrm{RR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&alpha;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{LSL}}-H_{(N-n+1)L}{H}_{\mathrm{LSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}$

${\mathrm{\&beta;}}_n=\frac{H_{(N-n+1)R}{H}_{\mathrm{RSL}}-H_{(N-n+1)L}{H}_{\mathrm{RSR}}}{H_{\mathrm{nL}}{H}_{(N-n+1)R}-H_{\mathrm{nR}}{H}_{(N-n+1)L}}.$

16. devices according to claim 12,13 or 15, it is characterized in that, when described N is odd number, the pumping signal that described pumping signal computing module outputs to loud speaker (N+1)/2 is identical with the center channels signal of audio-source.

17. devices according to claim 12,13 or 15, is characterized in that, when described audio-source is stereophony,

Described pumping signal computing module obtains left and right sound channels surround sound signal LS, RS of audio-source in the following manner:

Using L as desired signal, R, as input signal, carries out decorrelative transformation, obtains the surround sound signal LS of L channel;

Using R as desired signal, L, as input signal, carries out decorrelative transformation, obtains the surround sound signal RS of R channel.

18. devices according to claim 11,12,13 or 15, it is characterized in that, described stereo-circulation sound is 5.1 sound channels or 7.1 sound channel stereo-circulation sound.

19. devices according to claim 11,12,13 or 15, it is characterized in that, the player at described N number of loud speaker place is undertaken interconnected by LAN or WLAN mode, and to arrange a wherein player be master control player;

Described device comprises synchronous playing module further, for after have selected the audio-source identical with other N-1 loud speaker for loud speaker n, connect with master control player, receive the initial broadcasting clock T1 that master control player is sent, receive the pumping signal that pumping signal computing module exports, the timestamp PTS of the difference according to current system time clock T2 and T1: T2-T1 and origination audio frame starts to pumping signal corresponding to loud speaker n synchronism output origination audio frame; And receive the T2 of the renewal that master control player is periodically sent, the timestamp PTS of the difference according to current T2 and T1: T2-T1 and current audio frame is to pumping signal corresponding to loud speaker n synchronism output current audio frame.

20. devices according to claim 19, is characterized in that, described synchronous playing module comprises after receiving the T2 of the renewal that master control player is periodically sent further:

If whether the PTS+a of T2 – T1> current audio frame sets up, after if so, waiting for (a-1) chronomere, then export pumping signal corresponding to current audio frame to loud speaker n, wherein, a is preset value;

If the PTS>T2 – T1+a of current audio frame, then to master control player transmitting system clock adjustment value: the PTS – (T2 – T1) of current audio frame, so that current system time clock is reduced to T2 – (the PTS – (T2 – T1) of current audio frame) from T2 by master control player.