US008190203B2
`
`US 8,190,203 B2
`(10) Patent No.:
`az) United States Patent
`Pellandetal.
`(45) Date of Patent:
`May29, 2012
`
`
`(54) WIRELESS EARPHONE THAT TRANSITIONS
`BETWEEN WIRELESS NETWORKS
`
`(75)
`
`Inventors: Michael J. Pelland, Princeton, WI (US);
`Michael J. Koss, River Hills, WI (US);
`Michael Sagan, Marshall, WI (US);
`Steven R. Reckamp,Crystal Lake, IL
`(US); Gregory J. Hallingstad, Madison,
`WI (US); Jeffrey K. Bovee, Lake
`Geneva, WI (US); Morgan J. Lowery,
`DeForest, WI (US)
`
`(73) Assignee: Koss Corporation, Milwaukee, WI (US)
`
`(*) Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`US.C. 154(b) by 0 days.
`
`(21) Appl. No.:
`
`12/936,488
`
`(22) PCT Filed:
`
`Apr. 7, 2009
`
`(86) PCT No::
`
`PCT/US2009/039754
`
`§ 371 ()Q),
`(2), (4) Date:
`
`Dec. 20, 2010
`
`(87) PCT Pub. No.: WO2009/126614
`
`PCT Pub. Date: Oct. 15, 2009
`
`(65)
`
`Prior Publication Data
`
`US 2011/0103609 Al
`
`May5, 2011
`
`Related U.S. Application Data
`
`(60) Provisional application No. 61/123,265, filed on Apr.
`7, 2008.
`
`(51)
`
`Int. Ch.
`(2006.01)
`HO4M 1/00
`(2006.01)
`HOAR 1/10
`(52) US. CM.
`cieceecccssscssseevessssssessssseeeees 455/556.1; 381/74
`
`(58) Field of Classification Search.................. 455/445,
`455/414.4, 73, 456.1, 420, 20, 11.1, 421;
`370/401, 352, 335; 381/74
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`5,784,685 A
`6,792,091 B2
`6,937,712 B2
`7,003,515 Bl
`7,027,311 B2
`7,099,370 B2
`7,120,388 B2
`7,139,585 B2
`7,599,679 B2
`
`7/1998 Stanford etal.
`9/2004 Lemchenetal.
`8/2005 Lemchenetal.
`2/2006 Glaser
`4/2006 Vanderelli
`8/2006 Takahashi
`10/2006 Hall
`11/2006 Hachimuraet al.
`10/2009 Awiszus
`
`(Continued)
`
`FOREIGN PATENT DOCUMENTS
`WO 2007/136620 A2
`11/2007
`
`WO
`
`(Continued)
`
`OTHER PUBLICATIONS
`
`Supplementary European Search Report for European Application
`No. 09731146.8 mailed Jun. 10, 2011, 7 pages.
`
`(Continued)
`
`Primary Examiner — Kiet Doan
`(74) Attorney, Agent, or Firm — K&L Gates LLP
`
`(57)
`
`ABSTRACT
`
`A wireless earphone that comprises a transceiver circuit for
`receiving streaming audio from a data source overa local ad
`hoc wireless network. Whenthe data source and the earphone
`are out ofrange,they transition automatically to an infrastruc-
`ture wireless network. If there is no common infrastructure
`wireless network for both the data source and the speaker-
`phone set, the earphone connects to a host server via an
`available wireless network.
`
`33 Claims, 16 Drawing Sheets
`
`
`
`
`
` DATA
`SOURCE
`
`
`Ad Hoc Wireless
`Network
`
`Bose Exhibit 1008
`
`Bosev. Koss
`
`

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`US 8,190,203 B2
` Page 2
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`U.S. PATENT DOCUMENTS
`
`FOREIGN PATENT DOCUMENTS
`
`7,697,899 B2* WO 2007/139578 Al—12/20074/2010 Rofougaran ....... 455/73 Wo
`
`
`
`7,764,775 B2
`7/2010 Tarkoff et al.
`Wo
`WO 2008/054985 A2
`5/2008
`7,805,210 B2
`9/2010 Cucos
`Wo
`WO 2009/086555 Al
`7/2009
`2005/0064853 Al*
`3/2005 Radpour oc 455/414.4
`2005/0198233 Al
`9/2005 Manchester
`2006/0206487 Al
`9/2006 Harada
`2006/0212442 Al
`9/2006 Conrad
`2006/0212444 Al
`9/2006 Handman
`2007/0008984 Al
`1/2007 Philips
`2007/0037615 AL
`2/2007 Glezerman
`2007/0049198 Al
`3/2007 Walsh et al.
`2007/0116316 Al
`5/2007 Goldberg
`2007/0165875 Al
`7/2007 Rezvani
`2007/0230727 Al
`10/2007 Sanguino
`2008/0062939 Al
`3/2008 Van Horn
`2008/0101279 Al
`5/2008 Russell
`2008/0291891 Al
`11/2008 Jerlhagen
`2010/0246788 Al
`9/2010 Menardetal.
`
`OTHER PUBLICATIONS
`,
`.
`.
`International Search Report for International Application No. PCT/
`US09/39754 mailed Jun. 11, 2009, 2 pages.
`for International
`International Preliminary Examination Report
`Application No. PCT/US09/39754 mailed Oct. 28, 2010, 8 pages.
`Written Opinion of the International Searching Authority for Inter-
`.
`Pinion
`¢
`8
`national Application No. PCT/US09/39754 mailed Jun. 11, 2009, 5
`pages.
`“LTB 802.11 WiFi Headphones”, http://itreview.
`IT Review,
`belproject.com/item/1536 accessed on Mar. 13, 2008 (4 pages).
`.
`.
`* cited by examiner
`
`

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`U.S. Patent
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`DATASOURCE
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`CURRENT
`DATA RATE
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`SIZE OF
`UPDATE
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`UPDATE OK TO BE
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`SENT WIRELESSLY?
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`EARPHONEVIA HOST
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`Fig. 5
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`61
`COMMUNICATE
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`VIA AD HOC WIRELESS
`NETWORK?
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`
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`EXCHANGE DATA REGARDING LOCAL
`INFRASTRUCTURE NETWORKS
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`WIRELESS NETWORK
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`AUDIO CONTENT SERVER USING IP ADDRESS
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`LOSE CONNECTION?
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`US 8,190,203 B2
`
`1
`WIRELESS EARPHONE THAT TRANSITIONS
`BETWEEN WIRELESS NETWORKS
`
`PRIORITY CLAIM
`
`The present application claimspriority to U.S provisional
`application Ser. No. 61/123,265, filed Apr. 7, 2008, which is
`incorporated herein by reference.
`
`BACKGROUND
`
`Digital audio players, such as MP3 players and iPods, that
`store and play digital audio files, are very popular. Such
`devices typically comprise a data storage unit for storing and
`playing the digital audio, and a headphoneset that connects to
`the data storage unit, usually with a 44" or a3.5 mm jack and
`associated cord. Often the headphonesare in-ear type head-
`phones. The cord, however, between the headphonesand the
`data storage unit can be cumbersomeand annoyingto users,
`and the length ofthe cord limits the physical distance between
`the data storage unit and the headphones. Accordingly, some
`cordless headphones have been proposed, such as the Mon-
`ster iFreePlay cordless headphones from Apple Inc., which
`include a docking port on one of the earphones that can
`connect directly to an iPod Shuffle. Because they have the
`docking port, however, the Monster iFreePlay cordless head-
`phones from Apple are quite large and are not in-ear type
`phones. Recently, cordless headphones that connect wire-
`lessly via IEEE 802.11 toa WLAN-ready laptop or personal
`computer (PC) have been proposed, but such headphonesare
`also quite large and not in-ear type phones.
`
`SUMMARY
`
`In one general aspect, the present inventionis directed to a
`wireless earphone that comprises a transceiver circuit for
`receiving streaming audio from a data source, suchasa digital
`audio player or a computer, over an ad hoc wireless network.
`Whenthe data source and the earphone are out of range via
`the ad hoc wireless network, they may transition automati-
`cally to a common infrastructure wireless network (e.g., a
`wireless LAN). If there is no commoninfrastructure wireless
`network for both the data source and the earphone, the ear-
`phone may connectvia an available infrastructure wireless
`network to a host server. The host server may, for example,
`broadcast streaming audio to the earphone and/or transmit to
`the earphone a network address(e.g., an Internet Protocol(IP)
`address) for a network-connected content server that streams
`digital audio. The earphone may then connectto the content
`server using the IP address. The content server may be an
`Internet radio server, including, for example, an Internet radio
`server that broadcasts streaming audio from the data source or
`some other content.
`
`These and other advantageous, unique aspects of the wire-
`less earphone are described below.
`
`FIGURES
`
`invention are
`Various embodiments of the present
`described herein by way of example in conjunction with the
`following figures, wherein:
`FIGS. 1A-1E are views ofa wireless earphone according to
`various embodiments of the present invention;
`FIGS. 2A-2Dillustrate various communication modes for
`a wireless earphone according to various embodimentsofthe
`present invention;
`
`10
`
`15
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`20
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`25
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`30
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`35
`
`40
`
`45
`
`50
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`55
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`60
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`65
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`2
`FIG.3 is a block diagram ofa wireless earphone according
`to various embodiments of the present invention;
`FIGS. 4A-4B show the wireless earphone connected to
`another device according to various embodiments of the
`present invention;
`FIG. 5 is a diagram of a process implemented by a host
`server according to various embodiments of the present
`invention;
`FIG.6 is a diagram of a process implemented by the wire-
`less earphone to transition automatically between wireless
`networks according to various embodiments of the present
`invention;
`FIGS. 7, 8 and 10 illustrate communication systems
`involving the wireless earphone according to various embodi-
`ments of the present invention;
`FIG. 9 is a diagram of a headset including a wireless
`earphone and a microphone according to various embodi-
`ments of the present invention; and
`FIG. 11 is a diagram of a pair of wireless earphones with a
`dongle according to various embodiments of the present
`invention.
`
`DESCRIPTION
`
`In one general aspect, the present invention is directed to a
`wireless earphone that receives streaming audio data via ad
`hoc wireless networks and infrastructure wireless networks,
`and that transitions seamlessly between wireless networks.
`The earphone may comprise one or more in-ear, on-ear, or
`over-ear speaker elements. Two exemplary in-ear earphone
`shapes for the wireless earphone 10 are shown in FIGS. 1A
`and 1B,respectively, although in other embodimentsthe ear-
`phone maytake different shapes and the exemplary shapes
`shown in FIGS. 1A and 1Bare not intendedto be limiting. In
`one embodiment, the earphonetransitions automatically and
`seamlessly, without user intervention, between communica-
`tion modes. That is, the earphone maytransition automati-
`cally from an ad hoc wireless network to an infrastructure
`wireless network, without user intervention. As used herein,
`an “ad hoc wireless network” is a network where two (or
`more) wireless-capable devices, such as the earphone and a
`data source, communicate directly and wirelessly, without
`using an access point. An “infrastructure wireless network,”
`on the other hand,is a wireless network that uses one or more
`access points to allow a wireless-capable device, such as the
`wireless earphone,to connect to a computer network, such as
`a LAN or WAN(including the Internet).
`FIGS. 1A and 1B show example configurations for a wire-
`less earphone 10 according to various embodiments of the
`present invention. The examples shown in FIGS. 1A and 1B
`are not limiting and other configurations are within the scope
`of the present invention. As shown in FIGS. 1A and 1B, the
`earphone 10 may comprise a body 12. The body 12 may
`comprise an ear canal portion 14 that is inserted in the ear
`canal ofthe user ofthe earphone 10. In various embodiments,
`the body 12 also may comprise an exterior portion 15 that is
`not inserted into user’s ear canal. The exterior portion 15 may
`comprise a knob 16 or some other user control (such asa dial,
`apressure-activated switch, lever, etc.) for adjusting the shape
`of the ear canal portion 14. That is, in various embodiments,
`activation (e.g. rotation) of the knob 16 may cause the ear
`canal portion 14 to change shapeso asto, for example, radi-
`ally expand to fit snugly against all sides of the user’s ear
`canal. Further details regarding such a shape-changing ear-
`bud earphoneare described in application PCT/US08/88656,
`filed 31 Dec. 2008, entitled “Adjustable Shape Earphone,”
`whichis incorporated herein by referencein its entirety. The
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`US 8,190,203 B2
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`3
`earphone 10 also may comprise a transceiver circuit housed
`within the body 12. The transceiver circuit, described further
`below, may transmit and receive the wireless signals, includ-
`ing receive streaming audio for playing by the earphone 10.
`Thetransceiver circuit may be housedin theexterior portion
`15 of the earphone 10 and/or in the ear canal portion 14.
`Although the example earphones 10 shown in FIGS. 1A
`and 1B include a knob 16 for adjusting the shape of the ear
`canal portion 14, the present inventionis notso limited, and in
`other embodiments, different means besides a knob 16 may
`be usedto adjustthe ear canal portion 14. In addition, in other
`embodiments, the earphone 10 may not comprise a shape-
`changing ear canal portion 14.
`In various embodiments, the user may wear twodiscrete
`wireless earphones 10: one in each ear. In such embodiments,
`each earphone 10 may comprise a transceiver circuit. In such
`embodiments, the earphones 10 may be connected bya string
`or someother cord-type connector to keep the earphones 10
`from being separated.
`In other embodiments, as shown in FIG. 1C, a headband 19
`may connectthe two(left and right) earphones 10. The head-
`band 19 may be an over-the-head band, as shown in the
`example of FIG. 1C, or the headband maybe a behind-the-
`head band. In embodiments comprising a headband 19, each
`earphone 10 may comprise a transceiver circuit; hence, each
`earphone 10 mayreceive and transmit separately the wireless
`communication signals. In other embodiments comprising a
`headband 19, only one earphone 10 may comprisethe trans-
`ceiver circuit, anda wire may run along the headband19to the
`other earphone 10 to connect therebythe transceivercircuit to
`the acoustic transducerin the earphonethat does not comprise
`the transceiver circuit. The embodiment shown in FIG. 1C
`comprises on-ear earphones 10; in other embodiments, in-ear
`or over-ear earphones maybe used.
`In other embodiments, the earphone 10 may comprise a
`hanger bar 17 that allows the earphone 10 to clip to, or hang
`on, the user’s ear, as shown in the illustrated embodiment of
`FIGS. 1D-1E. FIG. 1D is a perspective view of the earphone
`and FIG.1Eis a side view according to one embodiment. As
`shown in the illustrated embodiment, the earphone 10 may
`comprise dual speaker elements 106-A, 106-B. One of the
`speaker elements (the smaller one) 106-A is sized to fit into
`the cavum conchaofthe listener’s ear and the other element
`
`(the larger one) 106-B is not. The listener may use the hanger
`bar to position the earphone on the listener’s ear. In that
`connection, the hanger bar may comprise a horizontal section
`that rests upon the upper external curvature of the listener’s
`ear behind the upper portion of the auricula (or pinna). The
`earphone may comprise a knurled knobthatallowsthe user to
`adjust finely the distance between the horizontal section of
`the hangerbar and the speaker elements, thereby providing, in
`such embodiments, another measure of adjustability for the
`user. Moredetails regarding such a dual element, adjustable
`earphone maybe found in U.S. provisional patent application
`Ser. No. 61/054,238, which is incorporated herein by refer-
`encein its entirety.
`FIGS. 2A-2Dillustrate various communication modes for
`
`10
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`25
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`digital audio playing device, such as a laptop or personal
`computer, that stores and/or plays digital audio files. In other
`embodiments, the data source 20 may generate analog audio,
`and the wireless network adapter 22 may encode the analog
`audio into digital format for transmission to the earphone 10.
`The wireless network adapter 22 may be an integralpart of
`the data source 20, or it may be a separate device that is
`connected to the data source 20 to provide wireless connec-
`tivity for the data source 20. For example, the wireless net-
`work adapter 22 may comprise a wireless network interface
`card (WNIC)or other suitable transceiver that plugs into a
`USBport or other port or jack of the data source 20 (such as
`a TRS connector) to stream data, e.g., digital audio files, via
`a wireless network (e.g., the ad hoc wireless network 24or an
`infrastructure wireless network). The digital audio transmit-
`ted from the data source 20 to the earphone10 via the wireless
`networks may comprise compressed or uncompressed audio.
`Anysuitable file format may be usedforthe audio, including
`mp3,
`lossy or lossless WMA, Vorbis, Musepack, FLAC,
`WAV, AIFF, AU,or any other suitable file format.
`Whenin range, the data source 20 may communicate with
`the earphone 10 via the ad hoc wireless network 24 using any
`suitable wireless communication protocol, including Wi-Fi
`
`(e.g., IEEE 802.1 1a/b/g/n), WiMAX (IEEE 802.16), Blue-
`tooth, Zigbee, UWB, or any other suitable wireless commu-
`nication protocol. For purposes of the descriptionto follow,it
`is assumedthat the data source 20 and the earphone 10 com-
`municate using a Wi-Fi protocol, although the invention is not
`so limited and other wireless communication protocols may
`be used in other embodiments of the invention. The data
`
`source 20 and the earphone 10 are consideredin range for the
`ad hoc wireless network 24 when the signal strengths (e.g.,
`the RSSJ) ofthe signals received by the two devices are above
`a threshold minimum signal strength level. For example, the
`data source 20 andthe earphone10 arelikely to be in range for
`an ad hoc wireless network when then are in close proximity,
`such as when the wearer of the earphone 10 has the data
`source 20 on his/her person, such as in a pocket, strapped to
`their waist or arm, or holding the data source in their hand.
`Whenthe earphone 10 and the data source 20 are out of
`range for the ad hoc wireless network 24, that is, when the
`received signals degrade below the threshold minimum signal
`strength level, both the earphone 10 and the data source 20
`may transition automatically to communicate over an infra-
`structure wireless network (such as
`a wireless LAN
`(WLAN)) 30 that is in the range of both the earphone 10 and
`the data source 20, as shown in FIG. 2B. The earphone 10 and
`the data source 20 (e.g., the wireless network adapter 22) may
`include firmware, as described further below, that cause the
`components to makethe transition to a commoninfrastruc-
`ture wireless network 30 automatically and seamlessly, e.g.,
`without user intervention. The earphone 10 may cache the
`received audio in a buffer or memory for a time period before
`playing the audio. The cached audio maybe playedafter the
`connection overthe ad hoc wireless network1s lost to give the
`earphone 10 and the data source 20 time to connect via the
`infrastructure wireless network.
`
`For example, as shown in FIG. 2B, the infrastructure net-
`a wireless data communication system involving the ear-
`work may comprise an access point 32 that is in the range of
`phone 10 according to embodimentsofthe presentinvention.
`both the data source 20 and the earphone 10. The access point
`As shownin FIG. 2A, the system comprises a data source 20
`32 maybe an electronic hardware device that acts as a wire-
`in communication with the earphone10 via an ad hoc wireless
`less access pointfor, and that is connected to, a wired and/or
`network 24. The earphone 10, via its transceiver circuit (de-
`wireless data communication network 33, such as a LAN or
`scribed in more detail below), may communicate wirelessly
`WAN,for example. The data source 20 and the earphone 10
`with a data source 20, which may comprise a wireless net-
`work adapter 22 for transmitting the digital audio wirelessly.
`may both communicate wirelessly with the access point 32
`
`For example, the data source 20 may beadigital audio player using the appropriate network data protocol (a Wi-Fi proto-
`(DAP), such as an mp3 playeror an iPod, or any other suitable
`col, for example). The data source 20 and the earphone 10
`
`60
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`US 8,190,203 B2
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`may both transition automatically to an agreed-upon WLAN
`30 that is in the range of both devices when they cannot
`communicate satisfactorily via the ad hoc wireless network
`24. A procedure for specifying an agreed-uponinfrastructure
`wireless network 30 is described further below. Alternatively,
`the infrastructure wireless network 30 may have multiple
`access points 32a-b, as shown in FIG. 2C. In such an embodi-
`ment, the data source 20 may communicate wirelessly with
`one access point 32and the earphone 10 may communicate
`wirelessly with another access point 32a of the sameinfra-
`structure wireless network 30. Again, the data source 20 and
`the earphone 10 maytransition to an agreed-upon WLAN.
`If there is no suitable commoninfrastructure wireless net-
`work over which the earphone 10 and the data source 20 can
`communicate, as shown in FIG. 2D, the earphone 10 may
`transition to communicate with an access point 32a for an
`available (first) wireless network (e.g., WLAN)30a thatis in
`the range of the earphone 10. In this mode, the earphone 10
`may connect via the wireless network 30a to a network-
`enabled host server 40. The host server 40 may be connected
`to the wireless network 30a via an electronic data communi-
`cation network 42, such as the Internet. In one mode,the host
`server 40 may transmit streaming digital audio via the net-
`works 33a, 42 to the earphone 10. In another mode, the host
`server 40 may transmit to the earphone 10 a network address,
`such as an Internet Protocol (IP) address, for a streaming
`digital audio content server 70 on the network 42. Using the
`received IP address, the earphone 10 may connect to the
`streaming digital audio content server 70 via the networks
`30a, 42 to receive and process digital audio from the stream-
`ing digital audio content server 70. The digital audio content
`server 70 may be, for example, an Internet radio station
`server.
`
`The digital audio content server 70 may stream digital
`audio over the network 42 (e.g., the Internet), which the
`earphone 10 mayreceive and process. In one embodiment,
`the streaming digital audio content server 70 may stream
`digital audio received by the streaming digital audio content
`server 70 from the data source 20. For example, where the
`data source 20 is a wireless-capable device, such as a portable
`DAP, the data source 20 may connectto the streaming digital
`audio content server 70 via a wireless network 306 and the
`
`network 42. Alternatively, where for example the data source
`20 is non-wireless-capable device, such as a PC, the data
`source 20 may have a direct wired connection to the network
`42. After being authenticated by the streaming digital audio
`content server 70, the data source 20 maystream digital audio
`to the streaming digital audio content server 70, which may
`broadcast the received digital audio over the network 42(e.g.,
`the Internet). In such a manner, the user of the earphone 10
`maylisten to audio from the data source 20 even when(i) the
`earphone10 andthe data source 20 are not in communication
`via an ad hoc wireless network 24 and(i1) the earphone 10 and
`the data source 20 are not in communication via a common
`local infrastructure wireless network 30.
`FIG.3 is a block diagram of the earphone 10 according to
`various embodiments of the present invention. In the illus-
`trated embodiment, the earphone 10 comprises a transceiver
`circuit 100 and related peripheral components. As shown in
`FIG. 3, the peripheral components of the earphone 10 may
`comprise a powersource 102, a microphone 104, one or more
`acoustic transducers 106 (e.g., speakers), and an antenna 108.
`Thetransceiver circuit 100 and someofthe peripheral com-
`ponents (such as the powersource 102 andthe acoustic trans-
`ducers 106) may be housed within the body 12 ofthe ear-
`phone 10 (see FIG. 1). Other peripheral components, such as
`the microphone 104 and the antenna 108 maybe external to
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`the body 12 of the earphone 10. In addition, some of the
`peripheral components, such as the microphone 104, are
`optional in various embodiments.
`In various embodiments, the transceiver circuit 100 may be
`implemented as a single integrated circuit (IC), such as a
`system-on-chip (SoC), which is conducive to miniaturizing
`the components of the earphone 10, which is advantageousif
`the earphone 10 is to be relatively small in size, such as an
`in-ear earphone (see FIGS. 1A-1B for example). In alterna-
`tive embodiments, however, the components of the trans-
`ceiver circuit 100 could be realized with two or morediscrete
`ICs or other components, such as separate ICs for the proces-
`sors, memory, and RF (e.g., Wi-Fi) module, for example.
`The power source 102 may comprise, for example, a
`rechargeable or non-rechargeable battery (or batteries). In
`other embodiments, the power source 102 may comprise one
`or more ultracapacitors (sometimes referred to as superca-
`pacitors) that are charged by a primary power source. In
`embodiments where the power source 102 comprises a
`rechargeable battery cell or an ultracapacitor, the battery cell
`or ultracapacitor, as the case may be, may be chargedforuse,
`for example, when the earphone 10 is connected to a docking
`station or computer. The docking station may be connected to
`or part ofa computer device, such as a laptop computer or PC.
`In addition to charging the rechargeable power source 102,
`the docking station and/or computer mayfacilitate download-
`ing of data to and/or from the earphone 10. In other embodi-
`ments, the power source 102 may comprise capacitors pas-
`sively charged with RF radiation, such as described in U.S.
`Pat. No. 7,027,311. The power source 102 may be coupled to
`a powersource control module 103 of transceivercircuit 100
`that controls and monitors the power source 102.
`The acoustic transducer(s) 106 may be the speaker element
`(s) for conveying the sound to the user of the earphone 10.
`According to various embodiments, the earphone 10 may
`comprise one or more acoustic transducers 106. For embodi-
`ments having more than onetransducer, one transducer may
`be larger than the other transducer, anda crossovercircuit (not
`shown) may transmit the higher frequencies to the smaller
`transducer and may transmit the lower frequencies to the
`larger transducer. More details regarding dual elementear-
`phones are provided in U.S. Pat. No. 5,333,206, assigned to
`Koss Corporation, which is incorporated herein by reference
`in its entirety.
`The antenna 108 mayreceive and transmit the wireless
`signals from and to the wireless networks 24, 30. A RF (e.g.,
`Wi-Fi) module 110 of the transceiver circuit 100 in commu-
`nication with the antenna 108 may, among other things,
`modulate and demodulate the signals transmitted from and
`received by the antenna 108. The RF module 110 communi-
`cates with a baseband processor 112, which performs other
`functions necessary for the earphone 10 to communicate
`using the Wi-Fi (or other communication) protocol.
`The baseband processor 112 may be in communication
`with a processor unit 114, which may comprise a micropro-
`cessor 116 and a digital signal processor (DSP) 118. The
`microprocessor 116 may control the various components of
`the transceiver circuit 100. The DSP 114 may, for example,
`perform various sound quality enhancements to the digital
`audio received by the baseband processor 112, including
`noise cancellation and sound equalization. The processor unit
`114 may be in communication with a volatile memory unit
`120 anda non-volatile memory unit 122. A memory manage-
`ment unit 124 may control the processor unit’s access to the
`memory units 120, 122. The volatile memory 122 may com-
`prise, for example, a random access memory (RAM)circuit.
`The non-volatile memory unit 122 may comprise a read only
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`US 8,190,203 B2
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`7
`memory (ROM)and/or flash memory circuits. The memory
`units 120, 122 may store firmware that is executed by the
`processor unit 114. Execution of the firmware bythe proces-
`sor unit 114 may provide various functionality for the ear-
`phone 10, such as the automatic transition between wireless
`networks as described herein. The memory units 120, 122
`may also cache received digital audio.
`A digital-to-analog converter (DAC) 125 may convert the
`digital audio from the processor unit 114 to analog form for
`coupling to the acoustic transducer(s) 106. An I°S interface
`126 or other suitable serial or parallel bus interface may
`provide the interface between the processor unit 114 and the
`DAC 125. An analog-to-digital converter (ADC) 128, which
`also communicates with the I?S interface 126, may convert
`analog audio signals picked up by the microphone 104 for
`processing by the processor unit 114.
`The transceiver circuit 100 also may comprise a USB or
`other suitable interface 130 that allowsthe earphone10 to be
`connected to an external device via a USB cable or other
`
`suitable link. As shown in FIG. 4A,the external device may be
`a docking station 200 connected to a computer device 202.
`Also, in various embodiments, the earphone 10 could be
`connected directly to the computer 202 without the docking
`station 200. In addition, the external device may be a DAP
`210, as shownin FIG.4B. In that way, the earphone 10 could
`connectdirectly to a data source 20, such as the DAP 210 or
`the computer 202, through the USBport 130. In addition,
`through the USBport 130, the earphone 10 may connect to a
`PC 202 or docking station 202 to charge up the power source
`102 and/or to get downloads(e.g., data or firmware).
`According to various embodiments, the earphone 10 may
`have an associated web page that a user may access through
`the host server 40 (see FIG. 2D) or some other server. An
`authenticated user could log onto the website from a client
`computing device 50 (e.g., laptop, PC, handheld computer
`device, etc., including the data source 20) (see FIG. 2D) to
`access the web pagefor the earphone10 to set variousprofile
`values for the earphone 10. For example, at the website, the
`user could set various content features andfilters, as well as
`adjust various sound control features, such as treble, bass,
`frequencysettings, noise cancellation settings, etc. In addi-
`tion, the user could set preferred streaming audio stations,
`such as preferred Internet radio stations or other streaming
`audio broadcasts. That way, instead oflistening to streaming
`audio from the data source 20, the user couldlisten to Internet
`radio stationsor other streaming audio broadcasts received by
`the earphone 10. In such an operating mode, the earphone
`user, via the web site, may prioritize a numberof Internet
`radio stations or other broadcast sources (hosted by streaming
`digital audio content servers 70). With reference to FIG.7, the
`host server 40 may send the IP address for the earphoneuser’s
`desired (e.g., highest priority) Internet radio station to the
`earphone 10. A button 11 on the earphone 10, such as on the
`rotating dial 16 as shown in the examples ofFIGS. 1A and 1B,
`may allow the user to cycle through the preset preferred
`Internet radio stations. That is, for example, when the user
`presses the button 11, an electronic communication may be
`transmitted to the host server 40 via the wireless network 30,
`and in response to receiving the communication, the host
`server 40 may send the IP address for the user’s next highest
`rated Internet radio station via the network 42 to the earphone
`10. The earphone 10 may then connect to the streaming digital
`audio contentserver 70 for that Internet radio station using the
`IP address provided by the host server 40. This process may
`be repeated, e.g., cycled through, for each preset Internet
`radio station configured by the user of the earphone 10.
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`At the web site for the earphone 10 hosted on the host
`server 40, in addition to cstablishing the identification of
`digital audio sources (e.g., [Ds for the user’s DAP or PC) and
`earphones, the user could set parental or other user controls.
`For example, the user could restrict certain Internet radio
`broadcasts based on content or parental ratings, etc. Thatis,
`for example, the