NZ739178B2

NZ739178B2 - A method of augmenting an audio content

Info

Publication number: NZ739178B2
Application number: NZ739178A
Authority: NZ
Inventors: Graham Tull
Original assignee: Powerchord Group Limited
Priority date: 2015-07-16
Filing date: 2016-07-14
Publication date: 2021-05-27

Abstract

method of augmenting an ambiently experienced audio content is provided, the method comprises recording an acoustic audio signal from the ambiently experienced audio content; receiving a wireless signal comprising a first audio signal and a second audio signal, the wireless signal received using a first wireless communication system, wherein the first audio signal comprises sound that is also audible within the ambiently experienced audio content and the second audio signal comprises sound that is substantially inaudible within the ambiently experienced audio content; comparing the first audio signal with the acoustic audio signal to determine a delay between the acoustic audio signal and the first audio signal; delaying the second audio signal by the determined delay; and reproducing the delayed second audio signal at an audible volume, such that it is substantially synchronised with the ambiently experienced audio content. A device and system for augmenting the ambiently experienced audio content are also provided. first wireless communication system, wherein the first audio signal comprises sound that is also audible within the ambiently experienced audio content and the second audio signal comprises sound that is substantially inaudible within the ambiently experienced audio content; comparing the first audio signal with the acoustic audio signal to determine a delay between the acoustic audio signal and the first audio signal; delaying the second audio signal by the determined delay; and reproducing the delayed second audio signal at an audible volume, such that it is substantially synchronised with the ambiently experienced audio content. A device and system for augmenting the ambiently experienced audio content are also provided.

Description

W0 20172’009654 A method of augmenting an audio content Technical Field The present invention relates to a method for augmenting an audio content.

Background Music concerts and other live events are increasingly being held in large venues such as stadiums, arenas and large outdoor spaces such as parks. With increasingly large venues being used, the nge of providing a consistently enjoyable audio experience to all attendees at the event, less of their on within the venue, is becoming increasingly challenging.

All attendees at such events expect to experience a high quality of sound, which is either heard directly from the acts performing on the stage, or reproduced from speaker systems at the venue. Multiple r systems distributed around the venue may often be ble to provide a consistent sound quality and volume for all audience members.

In some cases such systems may be unreliable and reproduction of the sound may be distorted. If multiple mentalists and/or vocalists are performing simultaneously on the stage, it may be very challenging to ensure the mix of sound being projected throughout the venue is correctly balanced in all areas. This may result in certain instrumentalists or vocalists being inaudible in n areas of the audience.

Statements of Invention According to an aspect of the t disclosure, there is provided a method of augmenting an ambiently experienced audio content, the method comprising: ing an acoustic audio signal from the ambiently experienced audio content, for example, using a sound transducer, e.g. a microphone; receiving a wireless signal comprising a first audio signal and a second audio signal, the wireless signal received using a first wireless communication system, wherein the first audio signal comprises sound that is also audible or clearly e within the ambiently experienced audio content and the second audio signal comprises sound that is substantially inaudible or not clearly audible within the ambiently experienced audio t; comparing the first audio signal with the acoustic audio signal to determine a delay between the acoustic audio signal and the first audio ; delaying the second audio signal by the determined delay; and reproducing the delayed second audio signal at an audible or clearly audible , such that it is substantially synchronised with the ambiently experienced audio content.

The first audio signal may be ured to correspond to the ambiently experienced audio content.

The method may further comprise: delaying the first audio signal by the determined delay; adjusting the relative volumes of the first and second audio signals according to an audio content setting; and reproducing the delayed first and second audio signals at the adjusted volumes, such that they are substantially synchronised with the ambiently experienced audio content.

The wireless signal may further comprise one or more additional audio signals. The method may further comprise: delaying the one or more onal audio signals by the determined delay; adjusting the volumes of the one or more additional audio signals, relative to the first and second audio signals, according to the audio content setting; and reproducing the delayed one or more onal audio signals at the adjusted volumes, such that they are substantially synchronised with the ambiently experienced audio content.

The method may r comprise receiving the audio content g from a user interface device using a second wireless ication system. The first wireless communication system may have a longer range than the second wireless ication system.

The wireless signal may comprise a lexed audio signal. The wireless signal may be a digitally modulated signal, e.g. a digital radio signal. The method may further comprise demuiltiplexing andior demodulating, e.g. decoding, the wireless signal.

The method may further comprise receiving authentication data. The authentication data may indicate that a user is authorised to attend and/or watch and/or listen to a performance. The authentication data may be required to perform one or more of receiving the wireless audio signal, demodulating the wireless audio signal, demultiplexing the wireless audio signal, decoding the wireless audio signals, delaying the audio s and reproducing one or more audio s.

The method may further comprise providing the ambiently experienced audio content, e.g. using a speaker system.

According to another aspect of the present disclosure, there is provided an audio oniser comprising: a wireless receiver configured to receive a wireless signal comprising two or more audio signals; and a controller configured to perform the method according to a previously ned aspect of the disclosure.

According to another aspect of the present disclosure, there is provided a system for augmenting an ambiently experienced audio content, the system comprising: a speaker system configured to provide the ambiently experienced audio content; an audio workstation configured to te a ittable signal comprising two or more audio signals, wherein at least one of the audio signals comprises sound that may also be audible within the ambiently experienced audio content, and at least one of the audio signals comprises sound that may be at a substantially inaudible volume within the ambiently experienced audio content; a transmitter configured to transmit the transmittable signal using a first wireless communication system; and an audio synchroniser. The synchroniser may se the synchroniser ing to a previously mentioned aspect of the disclosure.

The audio workstation may be further configured to generate at least one of the audio signals from a ity of audio channels provided to the audio workstation. At least one of the audio signals may correspond to the ambiently experienced audio t.

To avoid unnecessary duplication of effort and tion of text in the specification, n features are described in relation to only one or several aspects or embodiments of the invention. However, it is to be understood that, where it is technically possible, features described in relation to any aspect or embodiment of the invention may also be used with any other aspect or embodiment of the invention.

W0 20172’009654 Brief Description of the Drawings For a better understanding of the present invention, and to show more clearly how it may be carried into effect, reference will now be made, by way of e, to the accompanying drawings, in which: Figure 1 is a schematic view of a usly proposed arrangement of sound recording, mixing and reproduction apparatus for a large outdoor event; Figure 2 is a tic view showing the s of ing, processing and ucing sound within the arrangement shown in Figure 1; Figure 3 is a schematic view of an arrangement of sound recording, mixing and reproduction apparatus, according to an embodiment of the present invention, for a large outdoor event; Figure 4 is a schematic view showing the process of recording, processing and reproducing sound within the ement shown in Figure 3; and Figure 5 is a schematic view of a system for mixing a custom audio content according to an example of the present disclosure. ed Description With reference to Figure 1, a venue for a concert or other live event comprises a performance area, such as a stage 2, and an audience area 4. The audience area may comprise one or more stands of seating in a venue such as a theatre or arena.

Alternatively, the audience area may be a portion of a larger area such as a park, within which it is desirable to see and/or hear a performance on the stage 2. In some cases the audience area 4 may be variable, being defined by the crowd of people gathered for the performance.

With reference to Figures 1 and 2, the sound produced by instrumentalists and vocalists performing on the stage 2 is picked up by one or more microphone 6 and/or one or more instrument pick-ups 8 provided on the stage 2. The microphones 6 and pick-ups 8 convert the ic audio into a plurality of audio signals 20. The audio signals from the microphones 6 and pick-ups 8 are input as audio channels into a stage mixer 10, which adjusts the relative volumes of each of the channels.

The relative volumes of each of the audio channels mixed by the stage mixer 10 are set by an audio technician prior to and/or during the performance. The relative s may be selected to provide what the audio technician considers to be the best mix of instrumental and vocal sounds to be projected throughout the venue. In some cases performers may t that the mix is adjusted according to their own preferences.

The mixed, e.g. combined, audio signal 22 output by the stage mixer is input into a stage equaliser 12, which can be configured to increase or decrease the volumes of certain ncy ranges within the mixed audio signal. The equalisation settings may be selected by the audio technician and/or mers according to their personal tastes and may be ed according to the acoustic nment of the venue and the nature of the performance.

The mixed and equalised audio signal 24 is then input to a stage amplifier 14 which boosts the audio signal to e an amplified signal 26, which is provided to one or more front speakers 16a, 16b to project the audio signal as sound. onal speakers 18a, 18b are often provided within the venue to project the mixed and equalised audio to attendees located towards the back of the audience area 4. Sound from the front speakers 16a, 16b reaches audience members towards the back of the audience areas 4 a short period of time after the sound from the additional speaks 18a, 18b. In large venues, this delay may be detectable by the ce members and may lead to echoing or reverb type effects. In order to avoid such effects, the audio signal provided to the additional speakers 18a 18b is delayed before being projected into the audience area 4. The signal may be delayed by the additional speakers 18a, 18b, the stage amplifier 14, or any other component or device within the arrangement 1. Sound from the speakers 16a, 16b and the additional rs 18a, 18b will therefore reach an attendee towards the rear of the audience area 4 at substantially the same time, such that no reverb or echoing is noticeable.

Due to the mixed and equalised sounds being reproduced by multiple speaker systems throughout the venue, some of which are configured to delay the signal before reproducing the sound, interference may occur between the projected sounds waves in 2016/052139 certain areas of the venue which deteriorates the quality of audible sound. For example, certain ments and/or vocalists may become inguishable or inaudible within the l sound. In addition to this, the acoustic qualities of the venue may vary according to the on within the venue and hence the equalisation of the sound may be disrupted for some audience members. For example, the bass notes may become overly emphasised andior the treble notes may become substantially inaudible.

If the audience area comprises an area of a park or another public area, which is not secured against public access, there may be people in or around the audience area who are not authorised to attend the performance. For example, they may not have a ticket for the mance. If public access to the audience area cannot be prevented, e.g. by enforcing ticketed access to the venue, the stage mix projected from the speakers may be deliberately configured such that it does not comprise all of the audio channels input to the stage mixer. For e, the stage mix may not comprise audio channels from one or more vocalists and/or lead instrumentalists performing on the stage 2. Additionally or alternatively, only the audio in a certain frequency range may be provided within the stage mix projected from the speakers. For example, the stage mix may only comprise audio below a certain frequency. By using the arrangement 100, as described below, ised attendees may be able to listen to all channels of audio recorded from the stage and/or all frequency ranges of the audio, as bed in detail below.

With reference to Figures 3 and 4, in order to provide an improved quality and consistency of audio experienced by each authorised audience member attending a performance, and to allow the mix and equalisation of the audio to be individually adjusted by each audience member, an arrangement 100 of sound recording, mixing and reproduction tus, according to an embodiment of the present invention, is provided. The apparatus within the arrangement 100 is configured to record, mix and reproduce audio signals following a process 101.

The arrangement 100 comprises the microphones 6, instrument pick-ups 8, stage mixer 10, stage equaliser 12 and stage ier 14, which provide audio signals to drive the front speakers 16a, 16b and additional speakers 18a, 18b, as described above with reference to the arrangement 1. The ement 100 further comprises a stage audio er 120, an audio workstation 122, a multi-channel transmitter 124 and a plurality of personal audio mixing devices 200.

The stage audio splitter 120 is configured to receive the audio signals 20 from each of the microphones 6 and instrument pick-ups 8, and split the signals to e inputs 120a to the stage mixer 12 and the audio workstation 122. The inputs 120a received by the stage mixer 12 and the audio workstation 122 are substantially the same as each other, and are substantially the same as the inputs 20 received by the stage mixer 12 in the ement 1, described above. This allows the stage mixer 12 and components which receive their input from the stage mixer 12 to operate as described above.

The audio workstation 122 comprises one or more additional audio splitting and mixing s, which are configured such that each mixing device is capable of outputting a combined audio signal 128 comprising a different mix of each of the audio ls 120a, e.g. the ve volumes of each of the audio signals 120a within each of the combined audio signals 128 are different to within each of the other combined audio signals 128 output by the audio workstation 122. The audio workstation 122 may comprise a computing device, or any other system capable of processing the audio signal inputs 120a from the stage audio er 120 to generate the plurality of combined audio signals 128.

The combined audio signals 128 output by the audio workstation 122 are input to a channel audio transmitter 124. The multi-channel audio transmitter 124 is ured to transmit the combined audio signals 128 using wireless communication, such as radio, digital radio, Wi-Fi (such as RTM), or any other wireless communication method. The multi-channel audio transmitter 124 is also capable of relaying the combined audio signal to one or more further multi-channel audio transmitter 124’ using a wired or wireless communication . Relaying the combined audio signals allows the area over which the combined audio signal is transmitted to be extended.

Each of the combined audio s 128 may be transmitted tely using a separate wireless communication channel, bandwidth, or frequency. Alternatively, the combined audio signals 128 may be modulated, e.g. digitally modulated, and/or multiplexed together and transmitted using a single communication channel, bandwidth or frequency. For example, the combined audio signals 128 may be encoded using a Quadrature Amplitude Modulation (QAM) technique, such as 16-bit QAM. The audio signals transmitted by the multi—channel audio transmitter 124 are received by the plurality of personal audio mixing devices 200.

With reference to Figure 5, the personal audio mixing devices 200, according to an arrangement of the present disclosure, comprise an audio signal receiver 202, a decoder 204, a personal mixer 206, and a personal ser 208.

The audio signal receiver 202 is configured to receive the combined audio signals 128 transmitted by the multi-channel transmitter 124. As described above, the multi-channel transmitter 124 may encode the signal, for example using a QAM technique. Hence, the decoder 204 may be configured to decode and/or demodulate the received signal as necessary to recover each of the combined audio s 128.

As described above, the combined audio signals 128 each se a different mix of audio channels 20 recorded from the instrumentalists and/or vocalists performing on the stage 2. For example, a first combined audio signal may comprise a mix of audio channels in which the volume of the vocals has been increased with respect to the other audio channels 20; in a second ed audio signal the volume of an audio channel from the instrument pick-up of a lead ist may be increased with t to the other audio channels 20. The ed audio signals 128 are provided as inputs to the personal mixer 206.

The personal mixer 206 may be configured to vary the ve volumes of each of the decoded and/or lated combined audio s. The mix d by the personal mixer 206 may be selectively controlled by a user of the personal audio mixer device 200, as described below.

The user may use the personal mixer 206 to select a single combined audio signal 128 to listen to. The user may select a ed audio signal which comprises an audio channel from a particular performer, e.g. in which the particular channel is boosted relative to the other audio channels. For example, if the user is not able to hear a particular performer in an ambient sound being heard from the speakers, e.g. the performer is substantially inaudible in the ambiently experienced audio, the user may select a combined audio signal in which the audio from the particular performer has been boosted. Alternatively, if the speaker systems 16, 18 at the venue are not projecting sound recorded from all the stage audio channels, the user may use the personal mixer 206 to select a combined audio channel comprising the audio channels which are not present in the stage mix, and hence cannot be heard in the ambient audio content received from the speakers. Alternatively again, the user may set the personal mixer 206 to create a mix of one or more of the combined audio signals 128.

In a particular ement, each of the combined audio signals 128 is mixed by the audio workstation 122 such that each signal comprises a single audio channel 20 recorded from one microphone 6 or instrument pick-up 8. The personal mixer can therefore be ured by the user to provide a unique personalised mix of audio from the performers on the stage 2. The personal audio mix may be configured by the user to improve or augment the ambient sound, e.g. from the speakers and additional rs 16,18, heard by the user.

The mixed audio signal output from the personal mixer 206 is processed by a personal ser 208. The personal equaliser is similar to the stage equaliser described above and allows the volumes of certain frequency ranges within the mixed audio signal to be sed or decreased. The personal equaliser 208 may be configured by the user of the personal audio mixer device 200 ing to their own listening preferences.

The equalised audio signal from the personal equaliser 208 is output from the personal mixer device and may be converted to sound, e.g. by a set of personal head phones or speakers (not shown), allowing the user, or a group of users, to listen to the al audio content created on the personal audio mixing device 200.

Each authorised member of the audience may use their own personal audio mixing device 200 to listen to a al audio content at the same time as ing to the stage mix being ted by the speakers 16 and additional speakers 18. The audio reproduction of the performance provided by the personal audio mixing device 200 may be configured as desired by the user to complement or augment the sound being heard from the speaker systems 16, 18. For example, the personal audio content may be configured to comprise the audio channels from the mers which are not being projected by the speakers 16, 18. Alternatively, the personal audio content may be configured by the user to comprise a sound which is inaudible or substantially inaudible, within the ambient sound the user is experiencing.

In order for the user of the personal audio mixing device 200 to configure the personal mixer 206 and personal equaliser 208 according to their preferences, the personal audio mixing device 200 may comprise one or more user input devices, such as s, scroll wheels, or touch screen devices (not shown). Additionally or alternatively, the personal audio mixing device 200 may comprise a user interface communication module 214.

As shown in Figure 5, the user interface communication module 214 is configured to communicate with a user ace device 216. The user interface device may comprise any portable computing device capable of receiving input from a user and icating with the user interface communication module 214. For example, the user interface device 216 may be a mobile telephone or tablet computer. The user interface communication module 214 may communicate with the user interface device 216 using any form of wired or wireless communication methods. For example, the user ace communication module 214 may comprise a Bluetooth communication module and may be configured to couple with, e.g. tether to, the user interface device 216 using Bluetooth.

The user interface device 216 may run specific software, such as an app, which provides the user with a le user ace, such as a graphical user interface, ng the user to easily adjust the settings of the personal mixer 206 and personal equaliser 208. The user interface device 216 communicates with the personal audio mixer device 200 via the user interface communication module 214 to communicate any audio content settings, which have been input by the user using the user interface device.

The user interface device 216 and the al audio mixing device 200 may communicate in real time to allow the user to adjust the mix and equalisation of the audio delivered by the personal audio mixing device 200 during the concert. For example, the user may wish to adjust the audio content settings according to the mer or the stage on a specific song being performed.

The personal audio mixer device 200 also comprises a Near Field Communication (NFC) module 218. The NFC module may se an NFC tag which can be read by an NFC reader provided on the user interface device 216. The NFC tag may comprise authorisation data which can be read by the user interface device 216, to allow the user 2016/052139 ace device to couple with the personal audio mixing device 200. onally or alternatively, the authorisation data may be used by the user interface device 216 to access another service provided at the performance venue.

Additionally or alternatively, the NFC module 218 may comprise an NFC radio. The radio may be ured to communicate with the user interface device 216 to receive an audio content g from the user interface device. Alternatively, the NFC radio may read an audio content setting from another source such as an NFC tag provided on a concert ticket, or smart poster at the venue.

As mentioned above, the personal audio mixer 200 may allow authorised audience members to listen to all channels of audio recorded by the mers on the stage. In order to ensure that only authorised audience members may use the service, authentication data may be required by the personal audio mixer 200 to allow the personal audio mixer to reproduce one or more of the received audio channels. The personal mixer device may require the authentication data to perform any of the functions described above. For example, the personal audio mixer may require authentication data to decode and recover one or more of the combined audio signals.

The personal audio mixer may receive the authentication data from the user interface device 216 using the user interface communication module 214 or the NFC module 218. Alternatively, the personal audio mixer may receive authentication data from another source, for example by reading an NFC tag provided on the ticket for the performance.

The personal audio mixer device 200 r ses a microphone 210. The microphone may be a single channel hone. Alternatively the microphone may be a stereo or binaural microphone. The microphone is configured to record the ambient sound at the location of the user, for example the microphone may record the sound received from the speakers 16 and additional speakers 18 at the user’s location. The sound is converted by the microphone to an acoustic audio signal.

The acoustic audio signal is input to an audio processor 212. In the ement shown in Figure 5, the audio processor 212 is provided between the personal mixer 206 and the personal equaliser 208, e.g. the audio processor 212 receives the mixed audio signal from the personal mixer 206 and outputs a signal to the personal equaliser 208.

W0 20172’009654 The audio processor 212 analyses the waveform of the mixed audio signal, and the waveform of the acoustic signal to determine a delay between the acoustic audio signal recorded by the microphone 210 and the mixed audio signal received from the personal mixer 206. The audio sor 212 delays the mixed audio signal by the determined delay and outputs the delayed mixed audio channel to the personal equaliser 208. In this way, the personal audio content being created on the personal audio mixer device 200 may be synchronised with the ambient audio being heard by the user from the speakers 16, 18.

One or more of the decoded audio channels may comprise audio ls which have been recorded on the stage, but are not present in the stage mix being projected from the speakers 16, 18. Hence, the mixed audio signal provided by the personal mixer 206 may se sound which is substantially inaudible within the acoustic audio signal recorded by the microphone 210, e.g. it may be ntially inaudible within the ambient audio environment of the user. When the mixed audio signal is not audible within the ambient audio environment of the user and hence is not present in the acoustic audio signal recorded by the microphone 210, in order to allow the mixed audio signal to be appropriately d, the audio processor 212 may be configured to receive one or more d audio channels from the decoder 204. The audio processor 212 may consider each of the decoded audio s in order to determine the delay. Alternatively, the audio processor 212 may consider a particular decoded audio channel, which comprises a sound which is substantially audible within the ambient audio content. For example the audio sor may consider a decoded audio channel that has been configured by the audio workstation 122 to correspond to the mix of audio signals being projected by the speakers 16 and additional speakers It will be appreciated that the personal audio mixing device 200 may comprise one or more controllers configured to perform the functions of one or more of the audio signal receiver 202, the decoder 204, the personal mixer 206, the personal equaliser 208, the user interface communication module 214 and the audio processor 212, as described above. The controllers may comprise one or more s. Each of the modules may be configured to perform the functionality of one of the above-mentioned ents of the personal audio mixing device 200. Alternatively, the functionality of one or more of the ents mentioned above may be split between the modules or between the controllers. rmore, the or each of the modules may be mounted in a common housing or casing, or may be distributed between two or more housings or casings.

Although the invention has been described by way of example, with reference to one or more examples, it is not limited to the disclosed es and other examples may be created without departing from the scope of the invention, as defined by the appended claims.

Claims

1. A method of ting an tly experienced audio content, the method comprising: recording an acoustic audio signal from the ambiently experienced audio t; receiving a wireless signal comprising a first audio signal and a second audio signal, the wireless signal received using a first wireless communication system, wherein the first audio signal comprises sound that is also audible within the ambiently experienced audio content and the second audio signal comprises sound that is 10 substantially inaudible within the ambiently experienced audio content; comparing the first audio signal with the acoustic audio signal to determine a delay between the acoustic audio signal and the first audio signal; delaying the second audio signal by the ined delay; and reproducing the delayed second audio signal at an e volume, such that it is 15 substantially synchronised with the ambiently experienced audio content.

2. The method of claim 1, wherein the method further comprises: delaying the first audio signal by the determined delay; adjusting the ve volumes of the first and second audio signals according to 20 an audio t g; and reproducing the delayed first and second audio signal at the adjusted volumes, such that they are substantially synchronised with the ambiently experienced audio content. 25

3. The method of claim 2, wherein the wireless signal further comprises one or more additional audio signals, wherein the method further comprises: delaying the one or more additional audio signals by the determined delay; ing the volumes of the one or more additional audio signals relative to the first and second audio signals according to the audio content setting; and 30 reproducing the delayed one or more onal audio signals at the adjusted volumes, such that they substantially synchronised with the tly experienced audio content.

4. The method according to claim 2 or 3, wherein the method further comprises 35 receiving the audio content setting from a user interface device using a second wireless communication system.