AU2006100238A4 - Volume control device and distributed audio system - Google Patents
Volume control device and distributed audio system Download PDFInfo
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- AU2006100238A4 AU2006100238A4 AU2006100238A AU2006100238A AU2006100238A4 AU 2006100238 A4 AU2006100238 A4 AU 2006100238A4 AU 2006100238 A AU2006100238 A AU 2006100238A AU 2006100238 A AU2006100238 A AU 2006100238A AU 2006100238 A4 AU2006100238 A4 AU 2006100238A4
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- Australia
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- volume control
- output
- amplifier
- preamplifier
- control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Description
28/03 2006 15:53 FAX 61 3 92438333 GRIFFITH HACK IAUSTRALIA 004
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION INNOVATION PATENT Applicant; VCOMM PTY LTD A.C.N. 091 281 524 Title; VOLUME CONTROL DEVICE AND DISTRIBUTED AUDIO SYSTEM Invention The following statement is a full description of this invention, including the best method of performing it known to me/us: COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:53 FAX 61 3 92438333 GRIFFITH HACK 4 IPAUSTRALIA Q005 0 2 0 CA VOLUME CONTROL DEVICE AND DISTRIBUTED AUDIO SYSTEM Field of the Invention 00 The present invention relates to distributed audio system, C 5 and to a volume control device for use therein.
00 Background of the Invention There exist a number of music distribution systems with powered volume controls. Such volume controls house a 10 pre-amplifier and a small power amplifier for connection IN to speakers near the volume control.
0 Another existing system includes a volume control wall plate that includes a pre-amplifier,lwith an amplifier located either in each speaker or separately housed near the speakers.
Summary of the Invention The present invention provides, therefore, a volume control apparatus, comprising: an input for receiving input signals; a preamplifier for receiving signals from said input; an onboard amplifier for receiving signals from said preamplifier; a first output for outputting signals from said onboard amplifier; and a second output for outputting signals from said preamplifier without amplification by said onboard amplifier; wherein output from said socond output is suitable for inputting into an external amplifier.
i Thus, a user can use the output from the first output amplified by the onboard amplifier of the volume control apparatus), or the output from the second output (and typically amplify that output by means of an COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:53 FAX 61 3 92438333 GRIFFITH HACK -*IPAUSTRALIA IM006 3 0 C( external, more powerful amplifier), br both. The apparatus thus can operate either asta preamplifier with inbuilt amplifier or as a preamplifier to control an 00 additional stand-alone external amplifier.
CM In one embodiment, the volume control apparatus includes a 00 switch with a first setting for directing the output of Ci the preamplifier to the onboard amplifier and a second setting for directing the signals from the preamplifier to the second output.
VO
0i o The switch may include a third settiag that directs the ci signals from the preamplifier to both the onboard amplifier and the second output.
In one particular embodiment, the first output and the second output are provided as a combined output, and the apparatus includes a switch with a first setting for directing the signals from the preamplifier to the combined output via the onboard amplifier and a second setting for directing the signals from the preamplifier to the combined output without passing iia the onboard amplifier.
Hence, in the embodiment, the combined output acts as the first output when the signals from the preamplifier are directed to the combined output via the onboard amplifier, and as the second output when the signals from the preamplifier are directed to the combined output without passing via the onboard amplifier.
One of the benefits of the apparatus of the invention is that it allows a user to employ the onboard amplifier of the apparatus, and later to upgrade by adding an external amplifier and employing the second output, without changing any of the original hardware. As the external amplifier would typically be of a much higher audio COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:53 FAX 61 3 92438333 GIF~ AK4IASRLA[10 GRIFFITH HACK 4 IFAUSTRALIA R007 INO 4 (Nfidelity, the invention allows that uapgrade by the user by ct adding the external amplifier, while avoiding any need to replace the apparatus of the invention.
00 Another advantage of the apparatus of the invention is that it allows the user to employ both the oziboard 00 amplifier and an external amplifier, such as to provide audio in respective areas where lower fidelity and higher fieiy r esrd 01 No In one embodiment, the apparatus includes a control output o for turning controlling an external amplifier (such as to turn it on or into a standby mode). Thus, the external amplifier need not consume full power when the apparatus is itself turned off. The apparatus may also include a power switch to switch the onboard amplifier on and off to save power consumption when the second output is in exclusive use (with, for example, an external amplifier).
In one embodiment, the apparatus includes a control circuit for outputting a control signal adapted to control an external amplifier (such as to switch off or to go into a standby mode) The invention also provides a distributed audio system includes a volume control apparatus as described above.
In one embodiment, the volume control apparatus is one of a plurality of like volume control apparatuses.
Brief Description of the Drawing In order that the invention may be more clearly ascertained, preferred embodiments will now be described.
by way of example, with reference to the accompanying drawing, in which: Figure 1 is a schematic view of a distributed audio system according to an embodiment of the present invention; COMS ID No: SBMI-0315491 1 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:54 FAX 61 3 92438333 GRIFFITH HACK -*IPAUSTRALIA 0 008 0 0 ci Figure 2 is a schematic view of a distributed audio system according to another embodiment of the present invention; 00 Figure 3 is a schematic view of a distributed Ci 5 audio system according to a further embodiment of the present invention; 00 Figure 4 is a schematic citcuit diagram of the amplified volume control of the distributed audio systems o of figures 1 to 3; and Figure 5 is a schematic circuit diagram of an NO alternative amplified volume control for the distributed oaudio systems of figures 1 to 3.
ci Detailed Description of the Embodiments A distributed audio system according:to an embodiment of the present invention is shown generally at 10 in figure 1. The system 10 includes an audio player 12 and is designed to allow the output of audio player 12 to be played and its volume controlled -:through speakers disposed remotely from the audio player 12, typically in other rooms.
The audio player 12 may be in the fom of any audio player with suitable output, such as a CD player, MP3 player, personal computer, television tuner, radio tuner or DVD player. System 10 also includes a wall mounted input module 14 (connected to the output terminals 16 of the audio player 12 by electrical cables 18), which includes a wall plate 20 and RCA input jacks 22, and converts the signal from the audio player 12 to a balanced signal.
The system 10 includes a volume control apparatus, with which a user can control the audio volume output by the system, in the form of a first amplified volume control 24. First amplified volume control 24 is the principal mechanism by which the volume of the 'system 10 is controlled by a user when remote from the audio player 12.
COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2000 15:54 FAX 61 3 92438333 GIF~ AK4IASRLAII0 GRIFFITH HACK 4 IPAUSTRALIA 16009 Cl Amplified volume control 24 has an onboard preamplifier (not shown: see figure 4) and an onboard low powered amplifier (not shown: see figure 4) of, in this tn:udes an electrical cable 26 for connecting 00 -input module 14 and first amplified v0olume control 24.
Electrical cable 26 is in the form of an 8 conductor o twisted pair cable, and carries the aforementioned 010 balanced signal. The system 10 includeis an external INO amplifier 28 (viz, external with respect to first o amplified volume control 24), typically located in a ceiling cavity or other nearby location. and a set of speakers 30, connected to the output of external amplifier 28. External amplifier 28 is powered either by a remote power supply (not alien) or a local p ower source, such as 230 V (or local equivalent) plus power supply.
In the embodiment of figtre 1, the oriboard amplifier of amplified volume control 24 is turned off and the oniboard preamplifier of amplified volume control 24 is connected by cables 32 to external amplifier 28.. Thus, first amplified volume control 24 operates as a preamplifier to drive the external amplifier 28 and hence speakers 2S Amplified volume control 24 also has an infrared sensor (not shown) and can be controlled by means of an infrared remote control (also not shown). This also allows the audio player 12 to be controlled remo'tely: infrared signals received by first amplified volume control 24 and determined by the amplified volume control 24 to be adapted to control the audio player 12 are converted by first amplified volume control 24 into electrical signals and transmitted along 8 conductor twisted pair cable 26 to the input module 14. Input module 14 passes this signal to its 'infrared' output 34 (though still as an electrical signal). The system 10 also includes' an infrared repeater COMS ID No: SBMI-031 54911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:54 FAX 61 3 92438333 GRIFFITH HACK -4IPAUSTRALIA 01Ol ri 36, connected to infrared output 34 of input module 14; the infrared repeater 36 converts any received signal back into infrared and transmits the resulting infrared signal 38 to the audio player 12. Hence, the infrared reoote control can be operated in the vicinity of first amplified volume control 24 to remotely control the functions of o0 audio player 12.
o The system 10 includes a second amplified volume control 0 10 40, which is identical with first amplified volume control NO24 and hence also has an onboard preamplifier and an onboard low powered amplifier (not sAown). Second amplified volume control 40 is wired directly to first amplified volume control 24 by means of 8 conductor twisted pair cable 42, so that first amplified volume control 24 can provide audio signals to second amplified volume control 40. In the arrangement shown in figure 1, second amplified volume control 40 is not provided with an external amplifier; instead, the onboard amplifier of second amplified volume control 40 ip switched on and the output of that onboard amplifier is connected to a further set of speakers 44. As second amplifLed volume control is identical with first amplified volume control 24, the aforementioned infrared remote control can be used to control audio player 12 also; second;amplified volume control 40 can detect infrared signals from a remote control), convert them into electrical signals, and transmit those signals along cable 42 to the first amplified volume control 24 and from there as described above to input module 14.
It will be understood that system 10 nay include further identical amplified volume controls of essentially unlimited number.
The system 10 includes a power suppl4 46 that powers first and second amplified volume controls 24,40 via power COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2008 15:55 FAX 61 3 92438333 GIF~ AKIASRLAI]1 GRIFFITH BACK 4 IPAUSTRALIA laoll 0cables 4B. Power cables 46 may run alongside the audio/infrared cable 42, depending on the location of power supply 46.
00 A distributed audio system according to another embodiment of the present invention is shown generally at SO in 00 figure 2. Some features of system 50 are essentially en identical with features of system l0,r so like reference o numerals have been used to identify like features. System 010 50 includes multiple audio players 52a,S2b (of which there INO could be an essentially unlimited nuniber), a multi-input o amplifier 54 connected thereto and 'as in the embodiment Ci of figure 1 a wall mounted input module 14 (connected to the unbalanced output 56 of amplifier by electrical cables 1S 58). The input module 14 has a wall plate 20 and RCA input jacks 22, and converts the unbalanced signal from amplifier 54 to a balanced signal.
The input module 14 is wired to first amplified volume control 24 via 8 conductor twisted pai3'r cable 26.
Infrared signals received and converted to electrical signals by first amplified volume control 24 are also sent in cable 26 from first amplifiedlivolume control 24 to the infrared output 34 of the input module 14, so that an infrared remote control at first amplified volume control 24 can remotely operate the functions of the amplifier 54 and audio players 52a,52b. The onboatid amplifier of first amplified volume control 24 is turned off and an external amplifier 28 is connected to the onboard preamplifier of first amiplifiled volume control 24. External amplifier 28 is powered either through a remote ora& local power source, as in system 10 of figure 1. The first amplified volume control 24 operates as a preamplifier to drive the external amplifier 28, while external amplifier 28 drives the set of speakers 30. Second amplified volume control is wired directly from first amplified volume control 24 via 8 conductor twisted pair cable'42 to transmit audio COMS ID No: SBMI-031 54911 Received by IP Australia: Time (I-tm) 14:54 Date 2006-03-28 28/03 2006 15:55 FAX 61 3 92438333 GRIFFITH HACK 4IPAUSTRALIA Q012 0q signals to the second amplified volume control 40 (and 'infrared' control signals from amplified volume control to first amplified volume control'24). The onboard low powered amplifier of second amplified volume control 40 is wired directly to a further set of speakers 44. The system 50 includes a power supply 46 that powers first and C second amplified volume controls 24,40 via power cables 48.
ci 0 10 A distributed audio system according:to a further INO embodiment of the present invention is shown generally at in figure 3. System 70 is almost identical with system Ci 50 of figure 2, so like reference numerals have been used to identify like features. However, lunlike wall mounted 1S input module 14 of the embodiments of figures 1 and 2, system 70 has volume controls that are wired in a socalled 'star' topology in which input module 14' is directly wired to both first and second amplified volume controls 24,40 via respective 8 conductor twisted pair cables 26,42' (unlike in systems 10 and 50, where input module 14 is connected to first ampliiied volume control 24 which is then connected to second amplified volume control Figure 4 is a schematic circuit diagram of an amplified volume control 80, of the type shown at 24 and 40 in figures 1 to 3, so like features have'been identified by like reference numerals. The amplified volume control has a power input/output 82, for receiving power and should the amplified volume control 80 be operated with another comparable amplified volume control (such as is first amplified volume control 24 to tecond amplified volume control 40 in figures 1 and 2) for powering the further amplified volume control by means of a power cable (cf. power cable 48 of figures 1 and 2).
Amplified volume control 80 has signal I/O terminals 84 COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:55 FAX 61 3 92438333 GRIFFITHHBACK -)IPAUSTRALIA 0 013 Va 10 O 0 (for connection via 8 conductor twisted pair cable to input module 14) comprising infrarediterminals 86i, left audio-in terminals 861 and right audio-in terminals 86r.
In camse it is desired to connect ampiified volume control 80 to another comparable amplified volume control, amplified volume control 80 includes infrared terminals 00 88i, left audio-out terminals 881 and right audio-out terminals 88r.
0_ 10 I/O terminals 84 are connected to a preamplifier 90, whose Noutput is input into control circuitry 92. The output of 0 control circuitry 92 is connected to an onboard switch 94.
Ci Onboard switch 94 has three settings:: in a first setting (that depicted) the output of the preamplifier is directed to a 6 W onboard amplifier 96 the output of which is directed to first output 98. In a sekbond setting of switch 94, the output of the preampli fier 90 is directed to a second output 100 bypassing onboard amplifier 96). In a third setting of switch 94', the output of the preamplifier 90 is directed to both onboard amplifier 96 (and thence first output 98) and second output 100.
First output 98 of amplified volune cpntrol 80 is in the form of audio outputs for direct connection to a set of speakers (such as speakers 44 of figures 1 to 3).
Second output 100 in provided for those circumstances where higher fidelity sound is desired. For this reason, second output 100 comprises left and right output terminals, to which can be connected by a suitable cable a remotely located, high powered external amplifier 28 (the output of which is connected to a set of speakers, such as speakers 30 of figures 1 to This external amplifier 28 is controlled by preamplifier 90 via control circuitry 92. During this mode of operation with switch 94 in its second setting), onbcard amplifier 96 can be switched off.
COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:55 FAX 61 3 92438333 GRIFFITH HACK -)IPAUSTRALIA Q014 a- 11 It may also be desired to operate both amplifiers (i.e.
external amplifier 28 and onboard amplifier 96) simultaneously, and this is accomplished by means of the N 5 third setting of switch 94.
00 The control circuitry 92 of amplified volume control has a control output 102 for providing an on/off or standby control signal for the exteral amplifier 28.
Amplified volume control 80 also includes infrared sensor Va 104 for receiving infrared control signals from an oinfrared remote control (not shown), and infrared Ci circuitry 106 for receiving the outpu t of the infrared sensor 104, and passing those signals to signal I/O terminals 84 and control circuitry 92L Amplified volume control 80 includes an external volume control in the form of a pair of buttons (not shown), one to increase volume, the other to decrease volume, by means of which a user can control the volume of the ultimate audio output. This external volume centrol is connected to the control circuitry 92, so can be used to control control circuitry 92 to change the amplitude of the signal output by preamplifier 90. The volume can also be adjusted by means of the infrared remote control mentioned above, as infrared circuitry 106 is also connected to control circuitry 92.
In use, audio signals received at signal i/O terminals 84 are transmitted to preamplifier 90, and thence to control circuitry 92. From the control circuitry 92, the signals enter onboard switch 94 that as described above passes the signals to the onboard amplifier 96 or, bypassing the onboard amplifier, to second output 100 (for connection to external amplifier 28), or to both the'onboard amplifier 96 and second output 100.
COMS ID No: SBMI-03154911 Received by 1P Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:56 FAX 61 3 92438333 GRIFFITH HACK -3 IPAUSTRALIA @015 INO 12 0g Figure 5 is a schematic circuit diagram of an alternative amplified volume control 110, of theitype shown at 24 and in figures 1 to 3, according to another embodiment of 0 the present invention. Amplified volume control 110 is 00 Cq 5 identical in most respects with amplified volume control of figure 4, so like features have been identified by 00 like reference numerals. However, rather than having the n first output and second output as distinct outputs, in o amplified volume control 110 they are provided as a combined output 112. This may be suitable for those N applications in which the cables used to couple combined o output 112 to speakers or to an external amplifier can be CI accommodated by the same set of termilnals; alternatively, an adaptor connector can be added to modify combined output 112 from having, for example, RCA terminals (for connection to an external amplifier) to, for example, speaker binding posts (for connection to a set of speakers).
Modifications within the scope of the invention may be readily effected by those skilled in the art. It is to be understood, therefore, that this invention is not limited to the particular embodiments described by way of example hereinabove.
In the claims that follow and in the preceding description of the invention, except where the context requires otherwise owing to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprisingn is used in an inclusive sense.
that is, to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
Further, reference herein to prior art is not intended to imply that such prior art forms or formed a part of the common general knowledge.
COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28
Claims (3)
- 2. A volume control apparatus as claimed in claim 1, further comprising a switch with a first setting for directing said output of said preamplifier to said onboard amplifier and a second setting for directing said signals from said preamplifier to said second!output.
- 3. A volume control apparatus as claimed in claim 1, further comprising a control circuit for outputting a control signal adapted to control an external amplifier.
- 4. A volume control apparatus as claimed in claim 1, wherein said first output and said second output are provided as a combined output, and said apparatus includes a switch with a first setting for directing said signals from said preamplifier to said combined output via said onboard amplifier and a second setting for directing said signals from said preamplifier to said combined output without passing via said onboard amplifier. A distributed audio system comprising one or more volume control apparatuses as claimed in any one of the COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28 28/03 2006 15:56 FAX 61 3 92438333 GRIFFITH HACK -*IPAUSTRALIA 017 \D -14 O 0 preceding claims. ct Dated this 28th day of March 2006 VCOMM PTY LTD By their Patent Attorneys GRIFFITH HACK 0 Fellows Institute of Patent and Trade Mark Attorneys of Australia O 0 0 0 rcl COMS ID No: SBMI-03154911 Received by IP Australia: Time 14:54 Date 2006-03-28
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2006100238A AU2006100238A4 (en) | 2006-03-28 | 2006-03-28 | Volume control device and distributed audio system |
| PCT/AU2007/000255 WO2007109830A1 (en) | 2006-03-28 | 2007-03-01 | Volume control device and distributed audio system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2006100238A AU2006100238A4 (en) | 2006-03-28 | 2006-03-28 | Volume control device and distributed audio system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2006100238A4 true AU2006100238A4 (en) | 2006-05-04 |
Family
ID=36406735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2006100238A Ceased AU2006100238A4 (en) | 2006-03-28 | 2006-03-28 | Volume control device and distributed audio system |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2006100238A4 (en) |
| WO (1) | WO2007109830A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011135178A (en) * | 2009-12-22 | 2011-07-07 | Toyota Motor Corp | Acoustic device, acoustic system and sound signal control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243344A (en) * | 1991-05-30 | 1993-09-07 | Koulopoulos Michael A | Digital-to-analog converter--preamplifier apparatus |
| US6389139B1 (en) * | 1997-11-18 | 2002-05-14 | Dana Innovations | Powered volume control for distributed audio system |
-
2006
- 2006-03-28 AU AU2006100238A patent/AU2006100238A4/en not_active Ceased
-
2007
- 2007-03-01 WO PCT/AU2007/000255 patent/WO2007109830A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007109830A1 (en) | 2007-10-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| PC | Assignment registered |
Owner name: DEMDL NO.1 PTY. LTD. Free format text: FORMER OWNER WAS: VCOMM PTY LTD |
|
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |