CA1214113A - Stereophonic sound producing apparatus for a game machine - Google Patents
Stereophonic sound producing apparatus for a game machineInfo
- Publication number
- CA1214113A CA1214113A CA000451061A CA451061A CA1214113A CA 1214113 A CA1214113 A CA 1214113A CA 000451061 A CA000451061 A CA 000451061A CA 451061 A CA451061 A CA 451061A CA 1214113 A CA1214113 A CA 1214113A
- Authority
- CA
- Canada
- Prior art keywords
- input terminals
- mixers
- sound
- game
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005236 sound signal Effects 0.000 claims abstract description 12
- 239000000306 component Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
- H04S5/02—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
- H04S5/005—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation of the pseudo five- or more-channel type, e.g. virtual surround
Abstract
Abstract Disclosed is a stereophonic sound producing apparatus for a game ma-chine having left and right background sound input terminals for receiving sound signals from a first signal source, such as a laser disc player, front and rear game sound input terminals for receiving sound signals from a second signal source, such as a computer, and left and right control signal input terminals for receiving control signals from the second signal source. First, second, third and fourth loudspeakers are disposed at the front right side, front left side, rear right side, and rear left side with respect to a seat disposed at the center of a body member for the game machine. The loudspeakers are connected at preceding stages thereof to first through fourth power amplifiers and first through fourth mixers in that order respectively, the right side background sound input terminal connecting to the first mixer and to one of the third and fourth mixers through a first phase shifter, the left side background input terminal connecting to the second mixer and to one of the fourth and third mixers through a second phase shifter. One of the front and rear game sound input terminals connects to the first and second mixers, the other of the game sound input term-inals connecting to the third and fourth mixers separately through first and sec-ond variable gain controllers respectively. The left and right control signal input terminals are connected to the variable gain con rollers respectively, so that stereophonic sounds are controlled by logical "1" and "0" signals from the control signal input terminals.
Description
This invention relates to a stereophonic sound producing apparatus for a cockpit type game machine~ which produces stereophonic sounds from a two-channel source.
An object of the i.nvention :is to ut.ili~e the two-channel source to pro-duce stereophonic sounds of on-the-spot feelinc,u without swbstantially increasing any manufacturing cost.
According to a broad aspect of the invention there is provided a stereophonic sound producing apparatus for a game machine having left and ri.ght background sound input terminals for receiving sound signals from a first signal source, front and rear game sound input terminals for receiving sound signals from a second signal source, left and right control signal input terminals for receiving control signals from said second signal source; and first, secondl third and fourth loudspeakers disposed cat the front right side, front left side, rear right side, and rear left side with r~spect to a sea~ disposed a~ the center of a body member for the game machine; said loudspeakers connecting at preceding stages thereof to first through fourth power amplifiers and first through fourth mixers in that order respectively, said right side background sound input term-inal connecting to said first mixer and to one of said third and fourth mixers through a first phase shifter, said left side background input terminal connect-ing to said second mixer and to one of said fourth and third mixers through asecond phase shifter, one of said froJIt and rear game sound input terminals connecting to said first and second mixers~ the other of said game sound input terminals connecting to said third and fourth mixers separately through first and second variable gain controllers respectively, said left and right control signal lnput terminals connecting to said variable gain controllers respectively, so that stereophonic sounds are controlled by logical "1" and "0" signals from said control signal input terminals.
Next, an embodiment of the invention will be detailed in accordance with the drawings, in which:
Figure 1 i.s a plan view o:f the layout of a cockpit type game mach:ine.
and, Figure 2 is a block diagra.m of circuitry according to the present in-vention.
Referring to Figure 1, reference number 1 is the game machine body and
An object of the i.nvention :is to ut.ili~e the two-channel source to pro-duce stereophonic sounds of on-the-spot feelinc,u without swbstantially increasing any manufacturing cost.
According to a broad aspect of the invention there is provided a stereophonic sound producing apparatus for a game machine having left and ri.ght background sound input terminals for receiving sound signals from a first signal source, front and rear game sound input terminals for receiving sound signals from a second signal source, left and right control signal input terminals for receiving control signals from said second signal source; and first, secondl third and fourth loudspeakers disposed cat the front right side, front left side, rear right side, and rear left side with r~spect to a sea~ disposed a~ the center of a body member for the game machine; said loudspeakers connecting at preceding stages thereof to first through fourth power amplifiers and first through fourth mixers in that order respectively, said right side background sound input term-inal connecting to said first mixer and to one of said third and fourth mixers through a first phase shifter, said left side background input terminal connect-ing to said second mixer and to one of said fourth and third mixers through asecond phase shifter, one of said froJIt and rear game sound input terminals connecting to said first and second mixers~ the other of said game sound input terminals connecting to said third and fourth mixers separately through first and second variable gain controllers respectively, said left and right control signal lnput terminals connecting to said variable gain controllers respectively, so that stereophonic sounds are controlled by logical "1" and "0" signals from said control signal input terminals.
Next, an embodiment of the invention will be detailed in accordance with the drawings, in which:
Figure 1 i.s a plan view o:f the layout of a cockpit type game mach:ine.
and, Figure 2 is a block diagra.m of circuitry according to the present in-vention.
Referring to Figure 1, reference number 1 is the game machine body and
2 is a seat disposed at the center of body 1. A woofer 3 is disposed under the seat 2.
First, second, third and four~h loudspeakers 4, 5, 6 and 7 are disposed at the front right side, front left side, rear right side, and rear left side, with respect to the seat 2, a Braun tube (cathode ray tube) display unit 8 being disposed in front of seat 2.
Next, an explanation will be given regarding the construction of elec-tric circuitry for the respec~ive loudspeakers 4 through 7 in accordance with Figure 2.
In figure 2, 9 and 10 are background input terminals into which sound signals are fed from a first signal source (not shown), such as a laser disc player, the terminal 3 being used for the right side, and terminal 10 for the left side.
11 and 12 are game sound input *erminals into which sound signals are fed from a second signal source (not shown), such as a computer, the terminal 11 serving for the front, terminal 12 for the rear.
13 and 14 are control signal input terminals into which control signals c~re fed from the second signal source, the terminal 13 serving for the right side, ,~ d'~ Al ~ ql ;~
terminal 14 for th~ le~t side.
On the other hand, th~ irst loudspeaker ~ colmects at the precedirl~
stage thereof to a irst power amplifier 15 and a first mixcr 16, in tha~ order, the second loudspeaker 5 connecting similarly to a second power ampli:~ier 17 arld a second rnixer 18, in that order. Similarly, the th:ird loudspeaker 6 connects to a third power amplifier 19 and a th:ird mixer 20, in that order, and a fourth loud-speaker 7 connects to a fourth power amplifier 21 and a fourth mixer 22, in that order.
The right side background sound input terminal 9 connects to the first mixer 16 through a first buffer amplifier 23 and also to the fourth mixer 22 through the buffer amplifier 23 and a first phase shifter 24.
The left side background sound input terminal 10 connects to the second mixer 18 through a second buffer amplifier 25 and also to ~he third mixer 20 through the buffer amplifier 25 and a second phase shifter 26.
The front game sound input terminal 11 connects to the first and second mixers 16, 18 through a third buffer amplifier 27 and the rear game sound input terminal 12 connects to a fourth buffer ~lplifier 28, so that an output stage thereof connects to the third and fourth mixers 20, 22 separately through atten-uators 29, 30 serving as first and second variable gain controllers respectively.
Also, the left side and right side control signal input terminals 13, 1~ connect to the first and second attenuators 29, 30 respectively, and the out-put lines 31, 32, 33 and 3~ of buffer amplifiers 23, 25, 27 and 28 connect to the woofer 3 through a fifth mixer 35, a low-pass filter 36 and a fifth power ampli-fier 37J in that order.
In addition, the buffer amplifiers 23J 25, 27 and 28 amplify the oscil-lation output to drive the output lines and also allow the apparatus to operate stably by preventing the oscillation frequency from being affected by the rear stage.
The attenuators 29, 30 serve to weaken signals down to desired i~-tensities ~decibels).
Tile mixers 16~ 18, 20, 22 and 35 serve -to pxoperly mix two or more sound signals, or adjust them in quality.
The function of the embodiment constructed as abovementioned will now be described.
The sound signals from the input terminals 9 to 12 function as follows:
the signal given from the right background sound input terminal 9 actuates the first loudspeaker 4 at the forward right side through the co~ponents 23, 16 and 15~ and actuates the fourth loudspeaker 7 at the rear left side through the com-ponents 23, 24, 22 and 21.
The signal from the left background sound inpllt termainal 10 actuates the second loudspeaker 5 at the forward left side through the components 25, 18, and 17, and also the third loudspeaker 6 through the components 25, 26, 20 and 19 .
The signal from the front game sound input terminal 11 actuates the first and second loudspeakers 4 and 5 at the front through t~o lines of compon-ents 16 and 15 and components 18 and 17.
2Q Purthermore, the signal from the rear game sound input terminal 12 actuates the third and fourth loudspeakers 6 and 7 at the raar side through two lines of components 29, 20 and l9, and 30~ 22 and 21.
Here, when one control signal input termanal 13 has applied to it a logical "1" signal from the second signal source, such as a computer, the logical "1" signal controls the attenuator 29 in gain attenuation, whereby the sound from the third loudspeaker 6 at the rear right side becomes smaller with respect to that from the fourth loudspeaker 7 at the rear lef-t side. Hence, a player sit-~J~ 3 ting on the seat 2 and enjoying the game will hear the game sound as if it flows leftwardly from the front to the rear along a curve designated by ~a) in Figure 1.
When a logical "1" signal is applied to the other control signal input terminal 14, the logical "1" signal siMilarly controls the attenuator ~0 in gain attenuation, whereby the sownd from the fourth loudspeaker 7 at the rear lefk side becomes smaller with respect to that from the third loudspeaker 6. ~lence, the player will hear the game sound as if it flows rightwardly from the front to the rear along a curve ~b), thereby enabling the player to obtain an on-the-spot feeling.
In this case, the logical "0" and "1" signals applied to the control signal input terminals 13, 14 are combined with each other to enable the game sound to change in various flow patterns, thereby obtaining various on-the-spot feelings.
On the other hand, a low frequency signal given from the fifth mixer 35 -to the power amplifier 37 through the low-pass filter 36 actuates the woofer
First, second, third and four~h loudspeakers 4, 5, 6 and 7 are disposed at the front right side, front left side, rear right side, and rear left side, with respect to the seat 2, a Braun tube (cathode ray tube) display unit 8 being disposed in front of seat 2.
Next, an explanation will be given regarding the construction of elec-tric circuitry for the respec~ive loudspeakers 4 through 7 in accordance with Figure 2.
In figure 2, 9 and 10 are background input terminals into which sound signals are fed from a first signal source (not shown), such as a laser disc player, the terminal 3 being used for the right side, and terminal 10 for the left side.
11 and 12 are game sound input *erminals into which sound signals are fed from a second signal source (not shown), such as a computer, the terminal 11 serving for the front, terminal 12 for the rear.
13 and 14 are control signal input terminals into which control signals c~re fed from the second signal source, the terminal 13 serving for the right side, ,~ d'~ Al ~ ql ;~
terminal 14 for th~ le~t side.
On the other hand, th~ irst loudspeaker ~ colmects at the precedirl~
stage thereof to a irst power amplifier 15 and a first mixcr 16, in tha~ order, the second loudspeaker 5 connecting similarly to a second power ampli:~ier 17 arld a second rnixer 18, in that order. Similarly, the th:ird loudspeaker 6 connects to a third power amplifier 19 and a th:ird mixer 20, in that order, and a fourth loud-speaker 7 connects to a fourth power amplifier 21 and a fourth mixer 22, in that order.
The right side background sound input terminal 9 connects to the first mixer 16 through a first buffer amplifier 23 and also to the fourth mixer 22 through the buffer amplifier 23 and a first phase shifter 24.
The left side background sound input terminal 10 connects to the second mixer 18 through a second buffer amplifier 25 and also to ~he third mixer 20 through the buffer amplifier 25 and a second phase shifter 26.
The front game sound input terminal 11 connects to the first and second mixers 16, 18 through a third buffer amplifier 27 and the rear game sound input terminal 12 connects to a fourth buffer ~lplifier 28, so that an output stage thereof connects to the third and fourth mixers 20, 22 separately through atten-uators 29, 30 serving as first and second variable gain controllers respectively.
Also, the left side and right side control signal input terminals 13, 1~ connect to the first and second attenuators 29, 30 respectively, and the out-put lines 31, 32, 33 and 3~ of buffer amplifiers 23, 25, 27 and 28 connect to the woofer 3 through a fifth mixer 35, a low-pass filter 36 and a fifth power ampli-fier 37J in that order.
In addition, the buffer amplifiers 23J 25, 27 and 28 amplify the oscil-lation output to drive the output lines and also allow the apparatus to operate stably by preventing the oscillation frequency from being affected by the rear stage.
The attenuators 29, 30 serve to weaken signals down to desired i~-tensities ~decibels).
Tile mixers 16~ 18, 20, 22 and 35 serve -to pxoperly mix two or more sound signals, or adjust them in quality.
The function of the embodiment constructed as abovementioned will now be described.
The sound signals from the input terminals 9 to 12 function as follows:
the signal given from the right background sound input terminal 9 actuates the first loudspeaker 4 at the forward right side through the co~ponents 23, 16 and 15~ and actuates the fourth loudspeaker 7 at the rear left side through the com-ponents 23, 24, 22 and 21.
The signal from the left background sound inpllt termainal 10 actuates the second loudspeaker 5 at the forward left side through the components 25, 18, and 17, and also the third loudspeaker 6 through the components 25, 26, 20 and 19 .
The signal from the front game sound input terminal 11 actuates the first and second loudspeakers 4 and 5 at the front through t~o lines of compon-ents 16 and 15 and components 18 and 17.
2Q Purthermore, the signal from the rear game sound input terminal 12 actuates the third and fourth loudspeakers 6 and 7 at the raar side through two lines of components 29, 20 and l9, and 30~ 22 and 21.
Here, when one control signal input termanal 13 has applied to it a logical "1" signal from the second signal source, such as a computer, the logical "1" signal controls the attenuator 29 in gain attenuation, whereby the sound from the third loudspeaker 6 at the rear right side becomes smaller with respect to that from the fourth loudspeaker 7 at the rear lef-t side. Hence, a player sit-~J~ 3 ting on the seat 2 and enjoying the game will hear the game sound as if it flows leftwardly from the front to the rear along a curve designated by ~a) in Figure 1.
When a logical "1" signal is applied to the other control signal input terminal 14, the logical "1" signal siMilarly controls the attenuator ~0 in gain attenuation, whereby the sownd from the fourth loudspeaker 7 at the rear lefk side becomes smaller with respect to that from the third loudspeaker 6. ~lence, the player will hear the game sound as if it flows rightwardly from the front to the rear along a curve ~b), thereby enabling the player to obtain an on-the-spot feeling.
In this case, the logical "0" and "1" signals applied to the control signal input terminals 13, 14 are combined with each other to enable the game sound to change in various flow patterns, thereby obtaining various on-the-spot feelings.
On the other hand, a low frequency signal given from the fifth mixer 35 -to the power amplifier 37 through the low-pass filter 36 actuates the woofer
3 below ~he seat 2, whereby even if the seat has a cushion as usual, the player can hear lolY frequency sound and also is vibrated to be given an on-the-spot feeling.
Here, the game solmds dependent on the kinds of games are vario~ls, in which, for example, sounds of flying missiles or rockets, or sounds of shells flying about, are cited, Also, the low frequency sound could represent, for ex-ample, the blasting sound of a mine.
In addition~in the abovementioned embodiment, the output of terminal 9 is given to the fourth speaker 7 through the components 23, 2~, 22 and 21, and that of terminal lO to the third speaker 6 through the components 25,26, 20 ~nd 19. Alternatively, the construction may of course be vice versa.
~ .'17 ~
As abovementioned in detail, the apparatus of a :tirst aspect of -the i.n-vention is provided with the left and right background sowld input ~erminals 10, 9 which are given sound signals from the first signal source, such as the laser disc player, the front and rear game sound input terminals 11, 12 which are given sound signals from the second signa.l source, such as the computer, the left and right control signal input terminals 1~, 13 which are given control signals from the second signal source, and the first, second, third and fourth loudspeakers ~, 5, 6 and 7 disposed at the front right side, front left side, rear right side, and rear left side with respect to the seat 2 disposed at the center of the game machine body 1, so that the loudspeakers 4, 5, 6 and 7 connect at the preceding stages thereof to the firât through fourth power amplifier 15, 17, 19 and 21 and the first through fourth mixers 16, 18, 20 and 22, the right side background sound input terminal 9 connects to the first mixer 16 and to the third or fourth mixer 20 or 22 through the first phase shifter 24, the left side background sound input terminal 10 colmects to the second mixer 18 and to the fourth or third mixer 22 or 20 through the second phase shifter 26, one game sound input terminal 11 connects to the first and second mixers 16, 18, the other input ~erm-inal 12 connects to the third and fourth mixer 20, 22 through the first and sec-ond variable gain controllers 29, 30 respectively, and the left side and right side control signal input terminals 14, 13 connect to the variable gain control-lers 30, 29, so that the logical 7~177 and "0" signals at the control signal input te~minals 13, 1~ can obtain stereophonic sound. Hence, the stereophonic sound can be produced in four channels using the two channel source, variously changing a flow of sound, and having an on-the-s~ot feeling without increasing any manu-facturing cost.
A second aspect of the invention, besides the construction just de-scribed, disposes the woofer 3 below the seat 2 and connects to the background sound and game sound input terminals 9, 10, 11 and 12 throu~h the fifth mixer~
low-pass filter 36 and power amplifier 37, whereby, even if the seak has a cusl~--i.on as usual, the player can hear low frequency sound and be vibrated and ~iv~n a better on-the-spot feeling.
Here, the game solmds dependent on the kinds of games are vario~ls, in which, for example, sounds of flying missiles or rockets, or sounds of shells flying about, are cited, Also, the low frequency sound could represent, for ex-ample, the blasting sound of a mine.
In addition~in the abovementioned embodiment, the output of terminal 9 is given to the fourth speaker 7 through the components 23, 2~, 22 and 21, and that of terminal lO to the third speaker 6 through the components 25,26, 20 ~nd 19. Alternatively, the construction may of course be vice versa.
~ .'17 ~
As abovementioned in detail, the apparatus of a :tirst aspect of -the i.n-vention is provided with the left and right background sowld input ~erminals 10, 9 which are given sound signals from the first signal source, such as the laser disc player, the front and rear game sound input terminals 11, 12 which are given sound signals from the second signa.l source, such as the computer, the left and right control signal input terminals 1~, 13 which are given control signals from the second signal source, and the first, second, third and fourth loudspeakers ~, 5, 6 and 7 disposed at the front right side, front left side, rear right side, and rear left side with respect to the seat 2 disposed at the center of the game machine body 1, so that the loudspeakers 4, 5, 6 and 7 connect at the preceding stages thereof to the firât through fourth power amplifier 15, 17, 19 and 21 and the first through fourth mixers 16, 18, 20 and 22, the right side background sound input terminal 9 connects to the first mixer 16 and to the third or fourth mixer 20 or 22 through the first phase shifter 24, the left side background sound input terminal 10 colmects to the second mixer 18 and to the fourth or third mixer 22 or 20 through the second phase shifter 26, one game sound input terminal 11 connects to the first and second mixers 16, 18, the other input ~erm-inal 12 connects to the third and fourth mixer 20, 22 through the first and sec-ond variable gain controllers 29, 30 respectively, and the left side and right side control signal input terminals 14, 13 connect to the variable gain control-lers 30, 29, so that the logical 7~177 and "0" signals at the control signal input te~minals 13, 1~ can obtain stereophonic sound. Hence, the stereophonic sound can be produced in four channels using the two channel source, variously changing a flow of sound, and having an on-the-s~ot feeling without increasing any manu-facturing cost.
A second aspect of the invention, besides the construction just de-scribed, disposes the woofer 3 below the seat 2 and connects to the background sound and game sound input terminals 9, 10, 11 and 12 throu~h the fifth mixer~
low-pass filter 36 and power amplifier 37, whereby, even if the seak has a cusl~--i.on as usual, the player can hear low frequency sound and be vibrated and ~iv~n a better on-the-spot feeling.
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A stereophonic sound producing apparatus for a game machine having left and right background sound input terminals for receiving sound signals from a first signal source, front and rear game sound input terminals for receiving sound signals from a second signal source, left and right control signal input terminals for receiving control signals from said second signal source; and first, second, third and fourth loudspeakers disposed at the front right side, front left side, rear right side, and rear left side with respect to a seat dis-posed at the center of a body member for the game machine; said loudspeakers connecting at preceding stages thereof to first through fourth power amplifiers and first through fourth mixers in that order respectively, said right side background sound input terminal connecting to said first mixer and to one of said third and fourth mixers through a first phase shifter, said left side back-ground input terminal connecting to said second mixer and to one of said fourth and third mixers through a second phase shifter, one of said front and rear game sound input terminals connecting to said first and second mixers, the other of said game sound input terminals connecting to said third and fourth mixers sep-arately through first and second variable gain controllers respectively, said left and right control signal input terminals connecting to said variable gain controllers respectively, so that stereophonic sounds are controlled by logical "1" and "0" signals from said control signal input terminals.
2. A stereophonic sound producing apparatus for a game machine as claimed in claim 1 wherein said seat has thereunder a woofer connecting with each of said background sound and game sound input terminals through a fifth mixer, a low-pass filter, and power amplifier.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58-154325 | 1983-08-22 | ||
| JP58154325A JPS6046200A (en) | 1983-08-22 | 1983-08-22 | Stereo sound generating device for game machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1214113A true CA1214113A (en) | 1986-11-18 |
Family
ID=15581669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000451061A Expired CA1214113A (en) | 1983-08-22 | 1984-04-02 | Stereophonic sound producing apparatus for a game machine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4574391A (en) |
| JP (1) | JPS6046200A (en) |
| CA (1) | CA1214113A (en) |
| GB (1) | GB2145908B (en) |
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| JPH0228200U (en) * | 1988-08-12 | 1990-02-23 | ||
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| US20070243928A1 (en) * | 2006-04-13 | 2007-10-18 | Igt | Casino gaming incentives using game themes, game types, paytables, denominations |
| US8360847B2 (en) * | 2006-11-13 | 2013-01-29 | Igt | Multimedia emulation of physical reel hardware in processor-based gaming machines |
| US8142273B2 (en) | 2006-11-13 | 2012-03-27 | Igt | Presentation of wheels on gaming machines having multi-layer displays |
| US20080113747A1 (en) * | 2006-11-13 | 2008-05-15 | Igt | Mechanical reel hardware simulation using multiple layer displays |
| EP2089861A2 (en) * | 2006-11-13 | 2009-08-19 | Itg | Single plane spanning mode across independently driven displays |
| US8357033B2 (en) * | 2006-11-13 | 2013-01-22 | Igt | Realistic video reels |
| US8210922B2 (en) | 2006-11-13 | 2012-07-03 | Igt | Separable game graphics on a gaming machine |
| US8192281B2 (en) * | 2006-11-13 | 2012-06-05 | Igt | Simulated reel imperfections |
| WO2008091165A2 (en) * | 2007-01-23 | 2008-07-31 | Cult Sports Cars Limited | A computer game accessory, a seat and a method and system which may include use of either or both thereof |
| US8858343B2 (en) * | 2009-11-09 | 2014-10-14 | Igt | Server-based gaming chair |
| US8425316B2 (en) | 2010-08-03 | 2013-04-23 | Igt | Methods and systems for improving play of a bonus game on a gaming machine and improving security within a gaming establishment |
| US8298081B1 (en) | 2011-06-16 | 2012-10-30 | Igt | Gaming system, gaming device and method for providing multiple display event indicators |
| US8605114B2 (en) | 2012-02-17 | 2013-12-10 | Igt | Gaming system having reduced appearance of parallax artifacts on display devices including multiple display screens |
| US9820073B1 (en) | 2017-05-10 | 2017-11-14 | Tls Corp. | Extracting a common signal from multiple audio signals |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3761631A (en) * | 1971-05-17 | 1973-09-25 | Sansui Electric Co | Synthesized four channel sound using phase modulation techniques |
| US3772479A (en) * | 1971-10-19 | 1973-11-13 | Motorola Inc | Gain modified multi-channel audio system |
| US3982071A (en) * | 1974-08-20 | 1976-09-21 | Weiss Edward A | Multichannel sound signal processing system employing voltage controlled amplifiers |
| US4281833A (en) * | 1978-03-20 | 1981-08-04 | Sound Games, Inc. | Audio racquet ball |
| JPS5718110A (en) * | 1980-07-09 | 1982-01-29 | Arupain Kk | Equalizer device |
-
1983
- 1983-08-22 JP JP58154325A patent/JPS6046200A/en active Granted
- 1983-10-27 US US06/545,855 patent/US4574391A/en not_active Expired - Fee Related
-
1984
- 1984-04-02 CA CA000451061A patent/CA1214113A/en not_active Expired
- 1984-05-16 GB GB08412477A patent/GB2145908B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2145908B (en) | 1987-01-28 |
| GB8412477D0 (en) | 1984-06-20 |
| JPH0151240B2 (en) | 1989-11-02 |
| GB2145908A (en) | 1985-04-03 |
| US4574391A (en) | 1986-03-04 |
| JPS6046200A (en) | 1985-03-12 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |