CN2343731Y - Family movie theatre surrounding stereo sound - Google Patents
Family movie theatre surrounding stereo sound Download PDFInfo
- Publication number
- CN2343731Y CN2343731Y CN 98200782 CN98200782U CN2343731Y CN 2343731 Y CN2343731 Y CN 2343731Y CN 98200782 CN98200782 CN 98200782 CN 98200782 U CN98200782 U CN 98200782U CN 2343731 Y CN2343731 Y CN 2343731Y
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- signal
- audio amplifier
- sound
- power amplifier
- surround sound
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- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model relates to a surrounding stereo sound audio sound device of a family cinema, which comprises a power amplifier unit, a preposed sound box, a postpositive sound box and a left and a right sound boxes, wherein, the output of the power amplifier unit is connected with a subwoofer which only outputs left and right low frequency signals which are added through a corresponding signal processing amplifying circuit; the preposed sound box adds the left signal with the right signal; the postpositive sound box makes the left and right signals subtract; the left and right sound boxes only output high-frequency signals and are provided with a high pass filter. The power amplifier unit is provided with an acoustic channel proportional adjustment circuit and a non-signal detection circuit, and can be arranged in the subwoofer. The surrounding stereo sound audio sound device has low cost and simple circuit and can adjust different playing sound sources, and the utility model has vivid surrounding stereo sound.
Description
The utility model relate to a kind of cost lower, reproduce effect home theater surround sound acoustics true to nature.
At present, along with the raising of people's living standard, many facilities of family being purchased home theater.But the past is many make great efforts to attempt per capita to accomplish the sound reproduction of high-fidelity, early stage people has made great efforts to produce the power amplifier and the audio amplifier of various monophonys or dual track, comprise one or several loud speakers and frequency divider sound in the audio amplifier with reproduction full range band, for example, one three road audio amplifier comprises, a frequency divider and three loud speakers send high, medium and low frequency sound respectively, export to realize the full range band by frequency inverted level and smooth between three loud speakers.Stereo double channel is to adopt two audio amplifiers symmetries to place, and this sound provides sound between two audio amplifiers for listening the hearer, has reproduced stereo sound for the hearer that listens on axis between two audio amplifiers.But because stereo sounding in one plane, so can't produce surrounding sound effect.And invention Dolby Surround system of U.S. Dolby Labs, this system adopts five audio amplifiers, preceding mid-, a left side, right each one, establish around two audio amplifiers the back, this system is for listening the hearer and can produce surrounding effect on the axis, voice sends from mid-, but can produce the location mistake to the hearer who departs from the axis, and be difficult to obtain satisfied sound field for the sound that mainly is two sound channels, and dialogue sound also can send from left and right sides audio amplifier, and its power amplifying part is that the complex decoding circuit constitutes, and output connect different before, after, a left side, right voice box, its cost is higher, costs an arm and a leg, and general family is difficult for accepting.
The purpose of this utility model is exactly to provide a kind of home theater surround sound acoustics at the deficiency of prior art, and its cost is lower, and circuit is simple, can regulate for different broadcast sources of sound, and surround sound is true to nature.
The purpose of this utility model is achieved in that a kind of home theater surround sound acoustics, its power amplifier unit is exported left and right high-frequency signal and is connect left and right audio amplifier respectively, the output of wherein said power amplifier unit connects the subwoofer of the low frequency signal of only exporting left and right sides addition by the corresponding signal process amplifying circuit, and power amplifier unit output also is connected to the rearmounted audio amplifier that preposition audio amplifier and corresponding preposition audio amplifier with the left and right signal addition subtract each other left and right signal.
Described power amplifier unit output connects left and right audio amplifier by the signal processing amplifying circuit.
Described preposition audio amplifier can be double-coil loudspeaker, and its left and right road signal is added in "+" end of two voice coil loudspeaker voice coils respectively, and equal ground connection is held by "-" of two voice coil loudspeaker voice coils.
Described preposition audio amplifier can be two single-tone circle loud speakers, and left and right road signal is added in "+" end of two voice coil loudspeaker voice coils respectively, and equal ground connection is held by "-" of two voice coil loudspeaker voice coils.
Described rearmounted audio amplifier has independently volume control potentiometer.
Described power amplifier unit is connected to the balanced potentiometer of regulating the left and right acoustic channels contrast at the left and right acoustic channels input.
Described power amplifier unit includes the no signal testing circuit.
Described left and right audio amplifier has high pass filter.
Described power amplifier unit can place in the subwoofer.
According to the technique scheme analysis as can be known, the utility model has been compared several big characteristics with product in the past:
First: the utility model comprises front and rear and left and right sides audio amplifier, and a subwoofer, is spatial distribution, helps strengthening audience's space multistory sense.
Second: voice main sound source of the present utility model in preposition be center-channel speaker, can make the audience produce a kind of illusion like this, think that sound is in the picture from the speaker, but also the sound generating surrounding sound effect by other several audio amplifiers, make people's perceived sounds from the speaker, rather than preposition audio amplifier.
The 3rd: the utility model has carried out frequency limitation, makes left and right sides audio amplifier only send nearly high-frequency sound, make the people easily ignore voice from about send, but can carry out frequency compensation to the dialogue of preposition audio amplifier.
The 4th: each audio amplifier of the utility model sends the sound of different frequency range, the sound stack of each audio amplifier in Hz-KHz, can make and produce a broader Hz-KHz all around.
The 5th: the utility model can carry out left and right passage output by various signal producing methods, and a left side adds right passage output, and a left side subtracts the right side or the right side subtracts left passage output.
The utility model reproduces sound true to nature, particularly play CD, VCD etc. is contained the surround sound that dialogue effect and image match, and it has adjustable equilibrium, therefore for the broadcast source of sound of different quality, can adjust different volumes, further to reach around, effect true to nature.
Below in conjunction with accompanying drawing and specific embodiments the utility model is described in further detail.
Fig. 1 is provided with the formation block diagram for the utility model;
Fig. 2 is the utility model circuit theory diagrams;
Fig. 3 is a kind of embodiment circuit structure diagram of the preposition audio amplifier of the utility model;
Fig. 4 is the another kind of embodiment circuit structure diagram of the preposition audio amplifier of the utility model;
Fig. 5 is the rearmounted audio amplifier circuit structure diagram of the utility model;
Fig. 6 is the left and right audio amplifier circuit structure diagram of the utility model.
Referring to Fig. 1, the utility model is a kind of home theater surround sound acoustics, and its power amplifier unit output connects subwoofer, preposition audio amplifier, rearmounted audio amplifier and has the left and right audio amplifier that high pass filter is only exported high-frequency signal by the corresponding signal process amplifying circuit.Power amplifier unit can place in the subwoofer, reducing cost, and can save placement space.Subwoofer is only sent the low frequency part of (being the L+R signal) of right (R) signal plus in a left side (L).
The utility model shown in Figure 1 comprises a stereo signal source TV.This signal source also can be LD, VCD, CD, VCR, deck, recorder or other any stereophonic signal.Audio signal of source of sound (TV) output is connected to subwoofer and power amplifier unit by cable, and after two paths of signals was received in this unit, process signal processing and amplification were passed in the system again and gone in each audio amplifier.
This device subwoofer receives the L+R signal, but output low frequency part signal only, left and right amplifying signal also exports preposition audio amplifier to simultaneously, preposition receive left and right road signal after, carry out (L+R) stack, sound in the face of the audience then, preposition audio amplifier generally is placed near the television set, this audio amplifier can not influence the operate as normal of television set through anti-magnetic treatment.Power amplifier unit is exported left road signal simultaneously and is given left voice box, and the right wing signal is given right voice box, and comparatively speaking, left and right sides audio amplifier is less, only export the medium-high frequency signal, and it is accurately positioned.Rearmounted audio amplifier is received one (L-R)-or (R-L) signal, is used to produce the background surrounding sound effect.
Referring to Fig. 2, specify working mechanism of the present utility model.The stereophonic signal of input is imported by left and right sides passage (INPUT1 and INPUT2), input signal is carried out the processing that increases the weight of of bass by the BASS-BOOST switch, W1 is a duplex potentiometer, can carry out volume regulates, this potentiometer influences the volume of all audio amplifiers, and W2 is balanced potentiometer, the contrast of left and right sound channels in the scalable stereophonic signal, the dish source that can adapt to different qualities like this produces best surrounding effect.
Q501-Q507 can carry out soft slicing to signal to be handled, and suppressing excessive signal may be to the infringement of system's generation.
Q515-Q524 partly forms the left and right acoustic channels power amplifier, output is respectively OU1 and OUT2, OUT1 directly supplies with R channel, OUT2 directly exports to L channel, OU1 and OUT2 export to two voice coil loudspeaker voice coils of preposition loud speaker together simultaneously, and preposition loud speaker is that double-tone circle two-way output homophase is defeated by this loud speaker generation left and right acoustic channels addition effect.
IC401 and Q451-Q455 partly form the circuit part of subwoofer, and 13 pin of input IC401 behind the signal plus of the left and right sides take out low frequency partly after power amplifier amplifies through frequency processing, directly promote the bass loud speaker, produce bass effect.
Q341, Q342, Q352, Q353 and IC351 partly form signal deteching circuit, when signal equals zero, block power amplifier, make power amplifier not produce the noise that makes the people fidgety, when signal is imported, and just circuit operate as normal.
7815,7915 parts are power unit, the power supply of supply power amplifier and running amplifier.
C2～C6 is nonpolarity electrochemical capacitor, to control the frequency characteristic of each audio amplifier output sound.
Fig. 3, the 4th, the preposition audio amplifier circuit structure diagram of the utility model, it forms mode by two kinds.The loud speaker of preposition audio amplifier is a double-coil loudspeaker among Fig. 3, and the left and right road signal after amplify this moment is added in "+" end of two voice coil loudspeaker voice coils respectively, and equal ground connection is held by "-" of two voice coil loudspeaker voice coils, and like this, this loud speaker produces a stack (L+R) signal; The loud speaker of preposition audio amplifier is two single-tone circle loud speakers among Fig. 4, and left and right sides road signal is connected on two loud speakers "+" end respectively, and "-" holds equal ground connection, also produces stack (L+R) signal.
Fig. 5 is the rearmounted audio amplifier circuit structure diagram of the utility model, the loud speaker of rearmounted audio amplifier is the single-tone circle, in order to obtain (L-R) or (R-L) signal, loud speaker connects a left side and right signal respectively for two groups, be that OUT1 and OUT2 directly are connected on this loud speaker two ends, the part that differs of OUT1 and OUT2 makes its sounding like this, promptly obtains a difference signal, and rearmounted audio amplifier is (L-R) or (R-L) signal does not influence its effect.And rearmounted audio amplifier has independently volume control potentiometer W3, can regulate its volume separately according to other volume, also can be according to regulating volume with spectators' distance, and to adapt to different space structures and different putting position to produce optimum efficiency.
Fig. 6 is the left and right audio amplifier circuit structure diagram of the utility model, because the effect of high pass filter, the frequency of left and right sides audio amplifier is limited in medium-high frequency, only sends the medium-high frequency signal, and this just gets the audience and feels that voice is only near the preposition audio amplifier.
Surrounding sound effect has been strengthened in the distribution of each part of the utility model, make spectators enjoy the audiovisual surrounding sound effect, spectators generally face TV and preposition audio amplifier and sit, left and right sides audio amplifier places the spectators left side and the right, rearmounted audio amplifier places spectators' back, rearmounted audio amplifier can reach the space according to circumstances and be provided with one, also can be a plurality of, but and each rearmounted all independent regulation volume.
Claims (9)
1, a kind of home theater surround sound acoustics, the left and right high-frequency signal of its power amplifier unit output connects left and right audio amplifier respectively, it is characterized in that: the output of described power amplifier unit connects the subwoofer of the low frequency signal of only exporting left and right sides addition by the corresponding signal process amplifying circuit, and power amplifier unit output also is connected to the rearmounted audio amplifier that preposition audio amplifier and corresponding preposition audio amplifier with the left and right signal addition subtract each other left and right signal.
2, home theater surround sound acoustics according to claim 1 is characterized in that: described power amplifier unit output connects left and right audio amplifier by the signal processing amplifying circuit.
3, home theater surround sound acoustics according to claim 1, it is characterized in that: described preposition audio amplifier can be double-coil loudspeaker, and its left and right road signal is added in "+" end of two voice coil loudspeaker voice coils respectively, and equal ground connection is held by "-" of two voice coil loudspeaker voice coils.
4, home theater surround sound acoustics according to claim 1 is characterized in that: described preposition audio amplifier can be two single-tone circle loud speakers, and left and right road signal is added in "+" end of two voice coil loudspeaker voice coils respectively, and equal ground connection is held by "-" of two voice coil loudspeaker voice coils.
5, home theater surround sound acoustics according to claim 1, it is characterized in that: described rearmounted audio amplifier has independently volume control potentiometer.
6, home theater surround sound acoustics according to claim 1 is characterized in that: described power amplifier unit is connected to the balanced potentiometer of regulating the left and right acoustic channels contrast at the left and right acoustic channels input.
7, home theater surround sound acoustics according to claim 1, it is characterized in that: described power amplifier unit includes the no signal testing circuit.
8, home theater surround sound acoustics according to claim 2, it is characterized in that: described left and right audio amplifier has high pass filter.
9, home theater surround sound acoustics according to claim 1, it is characterized in that: described power amplifier unit can place in the subwoofer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98200782 CN2343731Y (en) | 1998-01-25 | 1998-01-25 | Family movie theatre surrounding stereo sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98200782 CN2343731Y (en) | 1998-01-25 | 1998-01-25 | Family movie theatre surrounding stereo sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2343731Y true CN2343731Y (en) | 1999-10-13 |
Family
ID=33958234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98200782 Expired - Fee Related CN2343731Y (en) | 1998-01-25 | 1998-01-25 | Family movie theatre surrounding stereo sound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2343731Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100566458C (en) * | 2004-07-29 | 2009-12-02 | 新日本无线株式会社 | Acoustical signal processing method and device |
| CN110139193A (en) * | 2018-02-02 | 2019-08-16 | 深圳市三诺数字科技有限公司 | The generation method of sound box system and spatial sound |
-
1998
- 1998-01-25 CN CN 98200782 patent/CN2343731Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100566458C (en) * | 2004-07-29 | 2009-12-02 | 新日本无线株式会社 | Acoustical signal processing method and device |
| CN110139193A (en) * | 2018-02-02 | 2019-08-16 | 深圳市三诺数字科技有限公司 | The generation method of sound box system and spatial sound |
| CN110139193B (en) * | 2018-02-02 | 2021-10-08 | 深圳市三诺数字科技有限公司 | Sound box system and space sound generation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |