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WO2003026343A2 - Interface de controleur pour systeme de sonorisation directionnel - Google Patents

Interface de controleur pour systeme de sonorisation directionnel Download PDF

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Publication number
WO2003026343A2
WO2003026343A2 PCT/GB2002/003699 GB0203699W WO03026343A2 WO 2003026343 A2 WO2003026343 A2 WO 2003026343A2 GB 0203699 W GB0203699 W GB 0203699W WO 03026343 A2 WO03026343 A2 WO 03026343A2
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WO
WIPO (PCT)
Prior art keywords
directional sound
sound unit
control
interface
output
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.)
Ceased
Application number
PCT/GB2002/003699
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English (en)
Other versions
WO2003026343A3 (fr
Inventor
Paul Thomas Troughton
Mark Richard Shepherd
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
1 Ltd
Original Assignee
1 Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 1 Ltd filed Critical 1 Ltd
Priority to AU2002319543A priority Critical patent/AU2002319543A1/en
Priority to GB0404401A priority patent/GB2395409B/en
Publication of WO2003026343A2 publication Critical patent/WO2003026343A2/fr
Publication of WO2003026343A3 publication Critical patent/WO2003026343A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63J—DEVICES FOR THEATRES, CIRCUSES, OR THE LIKE; CONJURING APPLIANCES OR THE LIKE
    • A63J5/00—Auxiliaries for producing special effects on stages, or in circuses or arenas
    • A63J5/02—Arrangements for making stage effects; Auxiliary stage appliances
    • A63J5/04—Arrangements for making sound-effects
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • G10K11/346—Circuits therefor using phase variation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2203/00—Details of circuits for transducers, loudspeakers or microphones covered by H04R3/00 but not provided for in any of its subgroups
    • H04R2203/12—Beamforming aspects for stereophonic sound reproduction with loudspeaker arrays

Definitions

  • the present invention relates generally to the control of one or more directional sound units. More particularly, the invention relates to a particularly convenient way of controlling such units using already existing control consoles.
  • WO 01/23104 discloses a directional sound unit (referred to as a directional acoustic antenna) comprising a plurality of transducers arranged in an array and each arranged to receive a sound signal independently.
  • a directional acoustic antenna comprising a plurality of transducers arranged in an array and each arranged to receive a sound signal independently.
  • One or more input sound signals are replicated, delays are applied to each replica and each delayed replica of the input sound signal is supplied to a single output transducer.
  • the delays are chosen such that the sound field obtained is directional, that is to say, beams or anti-beams of sound can be directed in a particular direction in a controlled manner. This means the sound can be mainly directed in a particular direction or focussed at a particular spot.
  • quiet spots or "null points" can be created in the sound field.
  • WO 01/23104 discloses a number of ways to control how the sound field is shaped as pre-recorded or live sound signals are played back.
  • One method involves using two steerable beams of light which are under the control of an operator, for example using a joystick, with appropriate control electronics to ensure that the sound is directed or focussed at the point of intersection of the two light beams.
  • a second method comprises recording an information signal associated with a recorded audio signal, the information signal providing information as to how the sound field should be shaped at any particular time.
  • the information signal is read out and the directional sound unit uses this information signal to direct the sound appropriately.
  • the first method suffers from the disadvantage that it cannot be used in conjunction with a light show, for example in a nightclub, because the beams of light used to direct the sound field would interfere with the light show. Furthermore, the first method is really only suitable for setting up a sound field which does not change thereafter and is not suitable for providing a dynamic sound field in which the direction of sound changes with time, preferably in correspondence with features of the sound signal itself or in conjunction with a light show.
  • the second method is suitable for playing back a recorded sound signal and controlling the directional sound unit such that the sound field can be manipulated dynamically over time, but suffers from the disadvantage that all audio signals must be pre-recorded along with associated information signals.
  • the system is not suitable for use in live performances where there are no information signals associated with the audio signals.
  • Even in the case of playing back pre-recorded signals there is the disadvantage that standard compact discs or mini-discs cannot be used because such standard recording media are not produced by manufacturers with directional sound information.
  • the present invention addresses these desires by providing a system for directing sound under user control comprising: a directional sound unit comprising a plurality of sonic output transducers; a lighting or camera control console; and an interface connected between said directional sound unit and said lighting or camera control console so that said directional sound unit may be controlled by said lighting or camera control console.
  • the lighting control console used has a plurality of output control channels for controlling at least one luminaire and the directional sound unit used has at least one input control channel for controlling the sound field of at least one audio channel output by the directional sound unit.
  • the interface therefore acts to select and interpret particular output control channels from the lighting control console and output control signals that can be read by the directional sound unit. If a camera control console is used, the interface acts to interpret camera control signals (eg pan, tilt, zoom in, focus etc) and output signals that can be understood by the directional sound unit.
  • the interface comprises input means arranged to read at least one of the plurality of output control channels comprising data in the first format, conversion means for converting the data to a second format, and output means arranged to output the data converted to a second format to the input control channel(s).
  • the input means can be arranged to read more than one output control channel, convert the data accordingly, and output data in the converted format to more than one input control channel.
  • the interface can read a plurality of output control channels and output a single input control channel if necessary.
  • the lighting control console has the capacity to control a large number of luminaires.
  • the directional sound unit will be connected (via the interface) to the lighting control console along with a plurality of such luminaires.
  • the input means of the interface comprises selection means for selecting which of said plurality of output control channels to read. This allows the interface to choose only those channels which relate to control of that directional sound unit and to ignore channels reserved for controlling luminaires or other directional sound units.
  • the interface may similarly be connected to the console in series or parallel with one or more cameras.
  • the plurality of output control channels are multiplexed and the input means comprises a demultiplexer such that the channels assigned to the directional sound unit can be selected.
  • Suitable directional sound units include those which comprise means for replicating an audio channel, means for delaying each replica by a calculated amount and means for supplying each delayed replica to a different one of the output transducers to thereby achieve a specified directional sound effect.
  • the first format is DMX-512 compliant since this is one of the most popular formats for controlling luminaires.
  • control codes corresponding to luminaire pan, luminaire tilt and luminaire brightness can be used to control sound beam pan, sound beam tilt and sound beam volume respectively.
  • control codes corresponding to camera pan, camera tilt and camera focus can be used to control sound beam pan, sound beam tilt and sound beam focus respectively.
  • the interface may be built in to the directional sound unit itself in which case the invention provides a directional sound unit comprising: a plurality of sonic output transducers; an interface as described above; at least one audio channel input; and means for controlling the directivity of an audio channel supplied to said at least one audio channel input in accordance with data supplied by said interface.
  • the present invention further provides an interface for coupling a lighting or camera control console to a directional sound unit so that said directional sound unit may be controlled by said lighting or camera control console.
  • the present invention furthermore provides a method of controlling a directional sound unit, said method comprising: using a lighting or camera control console to generate luminaire control signals; using an interface to convert said luminaire control signals to directional sound unit control signals; supplying said directional sound unit with said directional sound unit control signals so that the sound field of an audio channel emitted by said unit may be controlled by said lighting or camera control console.
  • the present invention includes the use of a lighting control console or a camera control console to control a directional sound unit.
  • FIG. 1 shows a prior art lighting control console which is connected to a plurality of luminaires by a serial data bus;
  • Figure 2 shows the main components of a directional sound unit having a single audio input and a separate information signal input used to control the sound field of sound derived from said audio input;
  • Figure 3 shows a directional sound unit capable of directing a plurality of audio signals independently of one another under the control of a separately provided information signal
  • Figure 4 shows an interface according to the present invention installed in a combined light and sound system with the directional sound unit of Figure 2 or Figure 3;
  • FIG. 5 shows in more detail the interface including the internal components thereof
  • Figure 6 shows an alternative embodiment to Figure 4 in which audio signals are routed through the interface rather than being applied directly to the directional sound unit;
  • Figure 7 shows the main internal components of a directional sound unit for use in the embodiment shown in Figure 6;
  • Figure 8 shows the main internal components of the interface of the embodiment of Figure 6;
  • FIG. 9 shows in more detail the output means of the interface shown in Figure 8.
  • Figure 10 shows a further embodiment of the invention in which the interface and delay controller are combined inside the directional unit; and Figure 11 shows another embodiment of the invention in which a camera control console is used to control the directional sound unit.
  • Figure 1 shows a lighting control console 1, for example the "Virtuoso” control console available from Narilite of Texas, USA.
  • the control console is connected to a plurality of luminaires L via a serial bus 2.
  • the luminaires are daisy- chained in series on the bus.
  • the lighting control console 1 is arranged to output a plurality (eg. 256, 512 or 2048) channels which are multiplexed together in accordance with a particular standard, for example the USITT DMX-512/1990.
  • Each luminaire L attached to the serial bus 2 receives the multiplexed channels and selects those channels which are assigned to it.
  • each channel is used to control a different function of the luminaire L and each luminaire L is arranged to read a plurality of channels, eg. 14.
  • Typical functions include luminaire tilt, luminaire pan, strobe functions, colour mixing functions and special effects such as ovalizer, frost, amber and dimmer.
  • user manipulations or preset programs at the control console 1 cause changes to the various settings of the various output channels and the individual luminaires L react to changes on a channel by altering their direction/colour etc.
  • each channel comprises an 8 or 16 bit number which corresponds to a particular setting.
  • a value of 0 corresponds to the lowest tilt the beam can occupy and a value of 256 (for an 8 bit number) corresponds to the highest tilt a beam can occupy.
  • Values in between correspond to discrete positions between the lowest and highest tilt positions. It can be arranged that different luminaries are arranged to read the same channels, in which case these luminaires perform in synchronism.
  • Figure 2 shows a simple embodiment of a directional sound unit of the type disclosed in WO 01/23104.
  • the present invention can be used with any of the sound units disclosed in WO 01/23104.
  • the illustrated directional sound unit S has an audio channel 3 supplied to it and a control channel 4 supplied to it.
  • the audio channel 3 is routed to replicating and delaying means 5 which comprises a replicator 6 and controllable delay elements 7.
  • the replicator 6 makes replicas of the input audio channel and supplies a replica to each of the controllable delay elements 7.
  • the delay elements 7 then output a delayed replica of the audio channel to a respective output transducer 8.
  • Various effects can be obtained by choosing appropriate delays as is described in WO 01/23104.
  • Each controllable delay element 7 is connected to, and controlled by, a delay controller 9 which calculates the delay value that each delay element 7 should apply to the replica audio signal that is supplied to the delay element 7.
  • the delay controller 9 computes the delay values in accordance with the control signal 4. In this way, the control signals can be used to control the shape of the sound field created by the audio channel. More generally, filter coefficients may be set rather than delay values, as described in WO 01/23104.
  • Figure 3 shows a more complex example which can cater for multiple audio channels.
  • a multiplexed stream of audio channels 3 is supplied to a demultiplexer 10 which in turn supplies a separate audio channel to separate replication and delay means 5.
  • Each replication and delay means 5 supply the plurality of outputs to a plurality of respective adders 11 which are in turn connected to the output transducers 8. In this way, separate audio channels can be directed independently using the principle of linear superposition.
  • the delay controller 9 interprets the control signals from the control signal input 4 and supplies delay values (in the case of Figure 3 twelve delay values supplied in total) to the replication and delay means 5.
  • Figure 4 shows a first embodiment of a system according to the present invention.
  • a directional sound unit S of the type shown in Figure 2 or Figure 3 is connected via an interface 12 to the serial bus 2 connected in a standard way to a lighting control console 1.
  • a plurality of luminaires L are connected to the serial bus.
  • the luminaires L need not be present although this is advantageous when a sound and light show is to be performed.
  • further directional sound units S can be connected via a further interfaces 12 to the serial bus 2.
  • One or more audio channels are supplied to the directional sound unit S via means 13 which is able to provide the audio channels to the directional sound unit S from one or more sound sources such as a microphone 14 or a compact disc player 15. If more than one audio channel is to be provided at a time, the means 13 may provide a multiplexed output of audio channels 3.
  • the interface 12 is arranged to read output control channels from the lighting control console 1 and to output control signals 4 which the directional sound unit S is capable of understanding, in order to effect a directional sound field for specified audio channels 3.
  • the construction of the interface is shown in more detail in Figure 5.
  • the serial bus 2 is connected to input means 16 which read from (but do not write to) the serial bus.
  • the interface also has an output serial bus port so that proper daisy-chaining can be achieved.
  • the input means 16 is arranged to select particular ones of the plurality of output control channels that travel along the serial bus 2. This can conveniently be achieved with dip switches although the interface as a whole can be provided as software in which case the channel selection can be programmable. In the example of Figure 5, five output control channels from the plurality of output control channels on the serial bus 2 are selected by the input means 16.
  • the channels are separated (eg. by demultiplexing) and the content 20 of each channel is transferred to a conversion means 17.
  • the conversion means 17 is operable to convert the data from the output control channels which is typically in a first data format into a second data format readable by the directional sound unit S. This data may be serial or parallel (it is shown as parallel data 21 in Figure 5) and the data is transferred to output means 18 which supply the control signals 4 to the directional sound unit S.
  • the lighting control console 1 outputs 512 channels and the interface 12 is arranged to read channels 64 to 68.
  • the input means 16 selects channels 64, 65, 66, 61 and 68 from the 512 channels available on the serial bus 2.
  • the channels are separated and the data comprised in each channel 20 is provided to the conversion means 17.
  • data 20 consists of an eight-bit number.
  • the conversion means is arranged to apply any necessary calculations to the five eight-bit words to ensure that the directional sound unit S receives control signals that cause a directional sound effect that is analogous to the lighting effect represented by the data read by the input means 16.
  • channel 64 relates to the "tilt" of the luminaire (as far as the lighting control console is concerned at least) then the possible range of values that the control channel may take (eg. 0 to 256 in the case of eight bit numbers) span the possible range of tilt of the luminaire (eg. 252 degrees for a Clay-Paky Stagecolour 1200 luminaire).
  • the value 0 relates to a tilt of 0 degrees
  • the value 256 relates to a tilt of 252 degrees with values inbetween being mapped to correspondingly between tilt angles.
  • the directional sound unit S will be able to tilt a sound beam over a different range, for example, just under 180 degrees since it is generally not possible for the sound unit to direct beams backwards.
  • the conversion means 17 serves to limit the values it receives for channel 64 and output the limited value.
  • the conversion means 17 receives a value corresponding to an angle of 180 to 252 degrees, it outputs a control signal (which in general will be also be a numerical value) that instructs the directional sound unit S to direct the beam with a tilt angle of 180 degrees (this being the maximum angle possible).
  • the conversion means 17 also applies any other conversion that is required to convert the first format of data on the serial bus 2 into a second format of data for the control signals 4 that the directional sound unit S can understand.
  • the interface 12 can receive eight-bit numbers from the serial bus 2 and output sixteen-bit numbers to the directional sound unit S.
  • the output means 18 will typically include a multiplexer which multiplexes the data in a second format together so that the multiplexed data stream 4 may be read by the directional sound unit. However, this is not necessary and parallel or serial data may be provided direct to the directional sound unit S if the directional sound unit S is arranged to receive such data.
  • the beam of sound should be emulated to "look like" a beam of light as far as the lighting control console 1 is concerned.
  • the interface should be arranged to read these signals and provide appropriate control signals to the directional sound unit S such that a sound beam rotates in space with a circular path of radius R. In this way, a beam of sound may be controlled as if it were a beam of light.
  • a particular channel eg. channel 128, could be assigned to the "strobe" function of a luminaire L. When this value is high the luminaire flashes at a high frequency and when this value is low the luminaire flashes at a low frequency.
  • a strobe function with a sound beam is less useful and so the interface can be constructed such that values on channel 128 are interpreted as a special sound effect such as a filtering effect to increase the bass or treble of the audio channel being output. In this way, the user at the lighting control console 1 can ostensibly vary the strobe of a light beam knowing in fact that they are varying a particular sonic effect of a sound beam.
  • the above description refers to a system in which the directional sound unit emulates a luminaire. It is also possible, however, to provide a new luminaire description to the control console which more exactly matches the capabilities of the directional sound unit (eg steering anywhere within a hemisphere).
  • the directional sound unit S has separate inputs for the audio channels 3 that are to be output and the control signals 4 that determine where each audio channel is directed.
  • Figure 6 shows an alternative embodiment wherein the interface also receives audio channel data 3 and all data is supplied to the directional sound unit S in a consolidated data stream 19.
  • the directional sound unit S may have a construction as shown in Figure 7 wherein a demultiplexer 20 separates audio channel 3 and control signal 4 data and supplies these data streams to the appropriate internal components in the manner of the directional sound unit shown in Figure 3.
  • Figure 8 shows the internal components of the interface unit 12 of Figure 6 wherein similar components have the same reference numerals.
  • the main difference between the interface of Figure 8 and the interface of Figure 5 is that the sound channels 3 are supplied by the means 13 to the output means 18 of the interface 12.
  • the output means 18 multiplexes together not only the control signals 21 but also the audio channels 3 to obtain a consolidated data stream 19.
  • Figure 9 shows the output means 18 of Figure 8 in more detail.
  • the output means 18 is operable to determine which control signals correspond to wliich audio channels.
  • Control signal 1 corresponds to audio channel 1
  • control signals 2 and 3 correspond to audio channel 2
  • control signals 4 and 5 correspond to audio channel 3.
  • the output means therefore comprises a demultiplexer 22 to separate the three audio channels 3.
  • Each of the audio channels is provided to a separate multiplexer 23 wliich multiplexes the audio channel 3 with its corresponding control channel 21.
  • the combined control audio channels are then all multiplexed together in a multiplexer 24 to achieve a consolidated data stream 19.
  • the interface is programmable such that the type of conversion carried out in the conversion means 18 and the correspondence between audio channels and control channels in the output means 18 may be set up by a user before use.
  • the interface has been shown as a separate component from the directional sound unit S both logically and physically. However, this need not be the case and the interface may be physically incorporated into the housing of the directional sound unit and, indeed, the interface 12 may be consolidated with the delay control means 9 such that all functions are provided by a single controller.
  • This controller is referenced 12/9 in Figure 10 which shows a further embodiment of the invention.
  • audio channels 3 are supplied to the directional sound unit S by the means 13 in the manner shown in Figure 4.
  • the directional sound unit S has a controller 12/9 which is operable to read values taken from the serial bus 2 and perform the necessary processing to supply delay values to the various delay means 7.
  • a directional sound unit S as shown in Figure 2 capable of directing only a single audio channel 3 is shown in Figure 10
  • a suitably modified directional sound unit S as shown in Figure 3 capable of directing a plurality of audio channels simultaneously, may equally be used.
  • the controller 12/9 thus has the function of selecting output control channels from the serial bus 2, converting the data in these channels into delay values (either by a direct calculation or via two stages in which the values are converted into standard control signals and delay values are obtained from the control signals), and then outputting the delay values to the various delay means 7.
  • the directional sound unit S may be plugged directly into the serial bus 2 as if it were a luminaire L and sound beam control may be effected by the lighting control console 1 without the need to reprogram the lighting control console, since the directional sound unit S emulates a luminaire in most important respects.
  • a combined light and sound show may be controlled by a single lighting control console and it is possible to move sound beams and light beams in synchronism by arranging for a luminaire L and directional sound unit S to read the same channels from the serial bus 2.
  • the present invention also includes the use of a camera control console.
  • An interface 32 can be provided to intercept and decode signals output by a camera control console 31 and supply them to a directional sound unit S.
  • Figure 11 shows a typical configuration which is similar to that shown in Figure 4.
  • interface 32 is arranged to read the camera control signals and convert them to a format that the directional sound unit S can understand.
  • a camera 33 is connected in parallel with the directional sound unit S.
  • luminaires L are connected in series with the directional sound unit S. It is not particularly important whether the connections are in parallel or in series and it is possible to connect cameras in series and luminaires in parallel for example.
  • the choice of series of parallel connection is determined by the exact format of the camera control channels output by the camera control console 31 and also by whether it is appropriate to daisy chain the various items of apparatus together.
  • the sound channel 3 is provided from a separate source (eg. a microphone 14 or a compact disc player 15).
  • the audio channel may be multiplexed with the control channels as shown in Figures 6 to 9.
  • the camera control console 31 may also be used to control more than one camera 33 even though only a single camera is shown in Figure 11.
  • the directional sound unit S emulates a camera and the interface 32 is capable of converting control signals intended for a camera into control signals that can be understood by the directional sound unit S.
  • control signals relating to camera pan, camera tilt and camera focus can be converted into directional sound unit control signals corresponding to sound beam pan, sound beam tilt and sound beam focus.
  • Sound beam focussing is described in WO 01/23104.
  • the interface 32 may be physically incorporated in the directional sound unit S. In this way, a single unit S can be plugged directly into the camera control console 31 and can be directed controlled by that console.
  • a further development of the invention involves the use of the directional sound unit S in conjunction with a Closed Circuit Television (CCTV) system, as typically used for security surveillance of public spaces. It is often desirable to talk, or send a prerecorded message (e.g. "No smoking permitted in this area"), to people who the CCTV operator can see through the cameras. When this is done using a conventional public address system, the message is often given to many more people than necessary, and may also not be sufficiently attention grabbing for the intended target. A zoned public address system improves this slightly, but requires the operator to choose an appropriate zone for the message.
  • CCTV Closed Circuit Television
  • a message can easily be delivered to the person the operator is looking at. Operation can be as simple as having a microphone and a "Push to talk" button.
  • a CCTV control system typically provides a joystick, or on-screen equivalent, to pan and tilt the currently selected camera, and may also provide zoom and focus controls.
  • the pan and tilt controls may send absolute values to the camera - e.g. pan 120 degrees and tilt 60 degrees relative to the camera's home position.
  • a much cruder protocol may be used, just sending commands such as "start moving left", and "stop moving left”. In this case, it is necessary to rely on absolute position sensing from the pan/tilt mount. This can be provided as an analogue signal using a pair of potentiometers, or (e.g. in the case of the Cohu, Inc 3920 series cameras), as part of the digital protocol.
  • the interface 32 receives from the camera control console 31 the pan, tilt, zoom and (if available) focus settings for the currently selected camera 33 and calculates the point in space at which the camera 33 is focussed. To do this, it must know the location and orientation of each camera mount. This information is often available to camera control systems (e.g. the Camfunction software from CCTV software). If the focal distance is not available, the interface may assume that the sound should be focussed at a default height (e.g. head height) for that portion of the area under surveillance. Alternatively, rather than focussing the sound on a point, a beam can be created whose coverage approximates the field of view of the camera 33, which is deduced from the zoom setting.
  • a default height e.g. head height
  • the interface 32 takes the point in space calculated above and, knowing the location and orientation of the directional sound unit S, derives the required sound beam settings (i.e. the delay values to be applied to the sound signal emitted from each output transducer). These can either cause a beam to be focussed on the same point in space, or produce a beam to cover the same approximate area. If it is not possible for the directional sound unit to provide sound to that location, the CCTV operator can be notified through a warning light, buzzer, or display, and optionally disabling the Pusli-To-Talk button.
  • the required sound beam settings i.e. the delay values to be applied to the sound signal emitted from each output transducer.
  • This functionality can conveniently be incorporated into a camera control signal, with one or more directional sound unit control ports. This is a preferred embodiment, as it allows for simple installation, and has the minimum duplication of effort. Alternatively, it can be retrofitted to an existing CCTV installation by intercepting the position feedback signals and the camera selection controls.

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  • Acoustics & Sound (AREA)
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  • General Health & Medical Sciences (AREA)
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  • Circuit For Audible Band Transducer (AREA)
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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente invention concerne une interface permettant de coupler une console de commande d'éclairage normalisé ou de caméra à une unité de sonorisation directionnelle du type comprenant une batterie de transducteurs acoustiques de sortie. L'interface fonctionne de façon que l'un au moins des faisceaux acoustiques directionnels puissent être commandés par la console de commande d'éclairage comme s'il s'agissait de faisceaux lumineux. L'interface peut être un composant distinct ou intégré à l'enceinte acoustique directionnelle. Cela permet de conduire des spectacles combinant lumières et sons en ne se servant que d'une console de commande.
PCT/GB2002/003699 2001-08-13 2002-08-13 Interface de controleur pour systeme de sonorisation directionnel Ceased WO2003026343A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002319543A AU2002319543A1 (en) 2001-08-13 2002-08-13 Controller interface for directional sound system
GB0404401A GB2395409B (en) 2001-08-13 2002-08-13 Controller interface for directional sound system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0119716.9 2001-08-13
GB0119716A GB2378876B (en) 2001-08-13 2001-08-13 Controller interface for directional sound system

Publications (2)

Publication Number Publication Date
WO2003026343A2 true WO2003026343A2 (fr) 2003-03-27
WO2003026343A3 WO2003026343A3 (fr) 2004-01-08

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GB (2) GB2378876B (fr)
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7515719B2 (en) 2001-03-27 2009-04-07 Cambridge Mechatronics Limited Method and apparatus to create a sound field
US7577260B1 (en) 1999-09-29 2009-08-18 Cambridge Mechatronics Limited Method and apparatus to direct sound
ES2344044A1 (es) * 2009-02-13 2010-08-16 Equipson, S.A Sistema de control simultaneo para equipos de iluminacion y audio.
US9532153B2 (en) 2012-08-29 2016-12-27 Bang & Olufsen A/S Method and a system of providing information to a user
US11256878B1 (en) 2020-12-04 2022-02-22 Zaps Labs, Inc. Directed sound transmission systems and methods

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FR2628335B1 (fr) * 1988-03-09 1991-02-15 Univ Alsace Installation pour assurer la regie du son, de la lumiere et/ou d'autres effets physiques d'un spectacle
US5885129A (en) * 1997-03-25 1999-03-23 American Technology Corporation Directable sound and light toy
US5859915A (en) * 1997-04-30 1999-01-12 American Technology Corporation Lighted enhanced bullhorn
KR100638960B1 (ko) * 1999-09-29 2006-10-25 1...리미티드 음향 지향 방법 및 장치
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7577260B1 (en) 1999-09-29 2009-08-18 Cambridge Mechatronics Limited Method and apparatus to direct sound
US7515719B2 (en) 2001-03-27 2009-04-07 Cambridge Mechatronics Limited Method and apparatus to create a sound field
ES2344044A1 (es) * 2009-02-13 2010-08-16 Equipson, S.A Sistema de control simultaneo para equipos de iluminacion y audio.
WO2010092197A1 (fr) 2009-02-13 2010-08-19 Equipson, S.A. Système de commande simultanée pour équipements d'éclairage et audio
ES2344044B1 (es) * 2009-02-13 2011-06-20 Equipson, S.A Sistema de control simultaneo para equipos de iluminacion y audio.
EP2398255A4 (fr) * 2009-02-13 2012-10-24 Equipson S A Système de commande simultanée pour équipements d'éclairage et audio
US9532153B2 (en) 2012-08-29 2016-12-27 Bang & Olufsen A/S Method and a system of providing information to a user
US11256878B1 (en) 2020-12-04 2022-02-22 Zaps Labs, Inc. Directed sound transmission systems and methods
US11520996B2 (en) 2020-12-04 2022-12-06 Zaps Labs, Inc. Directed sound transmission systems and methods
US11531823B2 (en) 2020-12-04 2022-12-20 Zaps Labs, Inc. Directed sound transmission systems and methods

Also Published As

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GB2395409B (en) 2005-08-10
WO2003026343A3 (fr) 2004-01-08
GB0119716D0 (en) 2001-10-03
GB2378876A (en) 2003-02-19
AU2002319543A1 (en) 2003-04-01
GB0404401D0 (en) 2004-03-31
GB2395409A (en) 2004-05-19
GB2378876B (en) 2005-06-15

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