WO2007112423A2

WO2007112423A2 - Intelligent audio speakers

Info

Publication number: WO2007112423A2
Application number: PCT/US2007/065306
Authority: WO
Inventors: Oleg Logvinov; Brion John Ebert
Original assignee: Oleg Logvinov; Brion John Ebert
Priority date: 2006-03-28
Filing date: 2007-03-28
Publication date: 2007-10-04
Also published as: WO2007112423A3; US8275144B2; US20080056507A1

Abstract

An Intelligent audio speaker that uses a power line communication element to provide audio distribution within homes, businesses, apartment complexes, and other buildings. Multiple intelligent audio speakers may be networked together, with common control. The intelligent audio speaker may. in some embodiments of the present invention, contain enhanced ambient backlight effects to further enhance the listener's experience, in some embodiments of the present invention, an existing audio speaker is retrofitted to an Intelligent audio speaker using a retrofit kit.

Description

TBCMNiCAI, FIELD

This invention relates generally to audio devices and equipment, and more particularly to intelligent audio speakers. Embodiments of the present invention relate to the distribution and management of audio in residences and businesses utilizing infrastructures provided by a local area network, a wide area network, or a combination of ihe two. Various embodiments of the present invention can be utilized on a network based on any medium, wired or wireless, but will be described further here in relation to a broadband power line network and/or a local area network based on power line communication. Various embodiments of the present invention have uses in at least two areas; ( I) a broadband power line access network that provides connectivity to homes, businesses, and other entities, and (2) a high-speed locai area power line network in a home, business or other environment, that provides connectivity among devices located within the environment, Embodiments of the present invention have use in any network utilizing digital music distribution, and/or a digital music application, and in some embodiments where enhanced ambiance capability and control are desired.

BACKGROUND ART

There exist today many types of packet-based communication networks, where data is exchanged among a number of devices, based primarily on the actions being performed at any one of the devices. In today's home entertainment and related networks, the data, or data patterns, can primarily be categorized Into three main types: streamed, control and request, and content information. Streamed refers to audio and video data of various formats (MPEGl , MPEG2, MPEG3, AVL etc.), control and request refers to data that relates to management and control of the audio and video streams, and content information refers to data related to the specifics of audio or video streams available on a network. The bulk, or largest portion, of the data being transmitted is usually streamed data (if should also be understood that streaming data could be represented by a sequence of packets). FhIs streamed data is normally distributed to a number of devices, wherein both audio and video may be distributed to an Audio/Video device such as a TV or monitor, and audio only may be distributed to audio rendering devices such as speakers,

In recent years, there has been interest in connecting existing audio and video devices to such networks, and also to enhance the Audio/Video experience within such networks. The present invention noi only solves the unmet need of connecting existing audio and video devices, for example, audio speakers, to such networks, additionally, in some embodiments, the novel use of ambiance effects to enhance the Audio/Video experience is also described. One such novel ambiance effect uses a backlighting arrangement that can be Installed to an Audio/Video device, such as a TV or a speaker, and can project Sight whose characteristics, such as color or intensity, can he changed based on the particular video or sound that is being viewed or listened to. Some embodiments of the present invention contain this novel use of ambiance effects. In some embodiments of the present invention, a retrofit device is disclosed that converts an audio speaker into a networked device that can communicate over a power line network, receive digital distributed audio signals or packets, convert this digital data to analog audio signals, and, in some embodiments of the present invention, create enhanced ambient backlight effects based on data received, and in some embodiments, user Input, In other embodiments of the present invention, a device is disclosed that is contained within, or otherwise electrically coupled to, an audio speaker that becomes a networked device that can communicate over a power line network, receive digital distributed audio signals or packets, convert this digital data to analog audio signals, and, in some embodiments of the present invention, create enhanced ambient backlight effects based on data received, and in some embodiments, user input,

3t is an object of the present invention to provide an apparatus for connecting audio speakers to a digital network, ft is another object of the present invention to provide an apparatus for connecting audio speakers to a digital network with enhanced ambient backlight effects. It is yet another object of the present invention to provide an apparatus that can be retrofit to existing audio speakers for connection to a digital network. It is yet another object of the present invention to provide an apparatus that can. be retrofit to existing audio speakers for connection to a digital network with, enhanced ambient backlight effects.

DISCLOSURE OF IHB I N VENIION

In accordance with the present Invention, there is provided an intelligent audio speaker comprising a power Hue communication element having a digital output, a digital to analog conversion element operative!}' coupled to the digital output of the power line communication element for converting a digital audio signal into an analog audio signal, an audio amplification element operative!)_' coupled to said digital, to analog conversion element, and an audio speaker driven by said audio amplification element.

The foregoing paragraph has been provided by way of introduction, and is not intended to limit the scope of the attached claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described by reference to the following drawings, in which like numerals refer to like elements, and hi which:

Figure .1 is a front perspective view of an intelligent audio speaker showing the intelligent audio speaker control unit mounted to the back of the audio speaker;

Figure 2 is a rear perspective view of the intelligent audio speaker of figure ϊ ;

Figure 3 is a front perspective view of an intelligent audio speaker showing the intelligent speaker control unit mounted to the bottom of the audio speaker;

Figure 4 is a front perspective view of an intelligent audio speaker showing the intelligent speaker control unit mounted to the top of the audio speaker;

Figure 5 is a perspective view of an intelligent audio speaker with the enhanced ambiance backlight effect;

Figure 6 is a block diagram showing the basic functional elements of the intelligent audio speaker;

Figure 7 is a block diagram showing the basic functional elements of the intelligent audio speaker with an ambient light emitter element;

Figure 8 is a block diagram showing the basic functional elements of the intelligent speaker with, an ambient light emitter element and with, a processing element; and

Figure 9 Is a diagram of a typical audio/video distribution network using power line communications.

The present invention will be described in connection with a preferred embodiment, however, it will be understood that there is no intent to limit the invention to the embodiment described. On the contrary, the intent is to cover all alternatives_* modifications, and equivalents as may be included within the spirit and scope of the invention as defined by this specification and the appended claims. BEST MODE FOR CARRYlNCi OUT THE INVENTION

in digital audio distribution networks that are coming into use in homes, businesses, apartment complexes, and other residential buildings, streaming audio and multimedia content is sourced/originated. captured, stored, transmitted, received, and rendered through a number of devices located throughout the network. In these digital audio distribution networks, there has been an unmet need to convert an audio speaker into a networked device that can receive digital audio data and convert this data to analog signals that can then be used to drive the audio speaker. As wili be described in the following description of the preferred embodiments of the present invention, the present invention and the various embodiments of the present invention described herein Fo! Jl Ii this unmet need, in some embodiments of the present invention, enhanced ambiance effects are created through the use of a light source that may, in some embodiments of the present invention, be mufti color. The effects of light color and intensity may be set by user input in some embodiments of the present invention, or may in other embodiments of the present invention, be set to automatically adjust based on the audio signal or data being received. The overall types and parameters of these ambiance effects may be controlled and adjusted by user input through software or hardware. In one of the preferred embodiments described herein, retrofit devices for tsse on a local area or wide area broadband power line network are described. These devices enable legacy audio rendering devices to support distributed digital content, allow for remote control of devices, and in some embodiments of the present invention, enable enhanced ambiance backlight effects, including in some embodiments of the present invention, remote setup and control of these effects.

The various embodiments of the present invention described herein exemplify operation on an electrical power distribution network: It should be understood, however, that the present invention is applicable to a network based on any medium. Both wired and wireless networks. a.nd derivatives, combinations and aubcombinations thereof, may be used in the various embodiments of the present invention as further described herein.

For a general understanding of the present invention, reference is made to the drawings. Sn the drawings, like reference numerals have been used throughout to designate identical elements.

Figure 1 is a front perspective view of an intelligent audio speaker showing the intelligent audio speaker eonirol unit mounted to the back of the audio speaker 100, Referring 1(5 Figure 1. an audio speaker 101 is depicted. The term audio speaker as used herein refers to either a single audio speaker or a plurality of audio speakers such as, for example, a cabinet containing a woofer, a tweeter, and a midrange frequency response speaker. Figure ϊ further depicts a control unit 103. The control unit 103 contains circuitry for receiving distributed audio content by way of power lines and converting said audio content to an analog audio signal of sufficient amplitude to drive the audio speaker 101 . The circuitry contained within the control unit 103 will be described further in this specification, and may, in some embodiments of the present invention, use system on a chip technologies. The control unit as depicted in figure 1 is mounted to the rear of an existing audio speaker 101. In some embodiments of the present invention, the control unit 103 is a retrofit kit that is attached to an existing audio speaker 101 to allow for the reception of audio content from power lines. Such a retrofit kit solves the unmet need of bringing audio into locations of a building that are difficult to wire with traditional analog speaker wire techniques. In other embodiments of the present invention, the control unit 103 is built into an audio speaker JOl either as an external structure appended to the audio speaker or as an integral unit contained within the audio speaker 101. The electronics contained within the control unit 1.03 will be further explained by way of figures 6, 7 and 8 and the supporting descriptive and enabling text contained later in this specification.

Referring now to figure 2, a rear perspective view of the intelligent audio speaker of figure I is depicted. The audio speaker 101 can be clearly seen with the accompanying control unit 103. Further, a power cord 203 can be seen. The power cord 203 provides connectivity to power distribution in a building. Such connectivity provides power for the circuitry contained in the control unit 103 as well as the delivery of audio content through power line communication of digiliai audio data. Power Sine communication is described in United States Patent 7, 106 J 77 to Logvinov and Ebert. entitled "Method And System For Modifying Modulation Of Power Line Communications Signals For Maximizing Data Throughput Rate", the entire disclosure of which is incorporated herein by reference. Figure 2 also shows a pair of audio speaker wires 201 connected between the control unit i 03 and the audio speaker 101 . The audio speaker wires cam¹ analog audio signals from the output of the control unit 103 to the audio input of the audio speaker 101. It should be noted that in some embodiments where the control unit 103 is contained within the audio speaker 101, the audio speaker wires 201 may also be contained within the audio speaker 101.

Referring now to figure 3, another embodiment of the intelligent audio speaker 300 is depicted. In the embodiment depicted in figure 3. a bottom mount control unit 301 is shown attached to the bottom of an audio speaker 101 , The bottom mount control unit 301 contains the same internal electronics as the control unit 103 previously depicted by way of figure 1. but has a physical geometry that allows for mounting on the bottom of an audio speaker. Now referring to Figure 4, another embodiment of the intelligent audio speaker 400 is depicted. In the embodiment depicted In figure 4. a top mount control unit 401 is shown attached to the top of an audio speaker 101. The top mount control unit 401 contains the same interna! electronics as the control υnit 103 previously depicted by way of figure 1, but has a physical geometry that allows for mounting on the top of an audio speaker. It should be further noted that alternative packaging of the control unit of the present invention would be within the skills and capabilities of one skilled in the art, and the scope of the present invention includes all modifications and variations to the physical packaging of the control unit of the present invention that would be known to one skilled in the art.

Figure 5 depicts an intelligent audio speaker with enhanced ambience backlight effect 500. In figure 5, an audio speaker 501 is depicted with the backlight effect 503. The backlight effect 503 is accomplished by way of an ambient light emitter element (not shown in figure 5). The ambient light emitter element will be described later in this specification and by way of figure 7. The backlight effect 503 is light that originates from the intelligent audio speaker 500. The light may modulate in intensity as the spectral content (including frequency and amplitude) of the audio changes with respect to time, In some embodiments of the present invention, the light may change color as the spectral content {including frequency and amplitude) of the audio changes with respect to time. Other variations of the backlight effect may include multiple color lights, lights that turn on and off, and the like.

Turning now to figure 6, a block diagram showing the basic functional blocks of the intelligent audio speaker is shown. St should be noted that the basic functional blocks of the intelligent audio speaker may be packaged in various ways such as discrete components, hoard level components, integrated components, or system on a chip components. Other forms of physical packaging and implementation will be known to those skilled in the art, and the various embodiments of the present invention are not intended to be limited to any one particular type of packaging and implementation. For example, system on a chip relates to technologies that integrate components of a system into a single integrated circuit. The system on a chip may contain analog, digital and radio frequency signals. System on a chip fabrication techniques are varied, and may include full custom designs where each individual transistor, devices, and related interconnects are laid out for fabrication, In addition, standard cell fabrication techniques, such as used in application specific integrated circuits, are used for some system on a chip designs, Standard cell fabrication techniques use cells or libraries of standard subcireuits thai are later interconnected in a higher level design. In addition, system on a chip fabrication techniques may also include field programmable gate arrays where the logic functions of the chip arc programmed using a iarge number of logic devices whose interconnects arc specified after initial fabrication. In some embodiments, system in package techniques may be used where a number of chips are contained within a single package. There are many techniques available to package a number of chips in a single package, including, for example, hybrid circuit packaging techniques.

Referring again to figure 6. digital audio data is received from a network 603. such as a broadband network operating on power lines, to a power line communication element 601 , Power line communication (PLC). aiso known by terms such as power Sine networking (PLN), mains communication, power line teiecoms {PL.T), powerband, or power area networking (PAN), describe systems that use power distribution wires for distribution of data. These systems are carrier based, and work by superimposing a signal over the alternating current, which is commonly 50 or 60 hertz. These systems include both Broadband over Power Lines (BFI.) and Narrowband over Power Lines. Power line communication systems use variations of orthogonal frequency division multiplexing (OFDM), Many commonly used Power Line Communications systems use a signal frame structure that includes a payload portion interposed between start and end delimiters.

Standards for Power Line Communications continue to evolve. An example of such evolution is the work of the IEiEE working group P i 901 in developing a standard for broadband power line communications. Many of the standards, modifications and improvements to Power Line Communications are driven by the harsh nature of the power line medium. Power lines represent a harsh environment for the transmission of data. Varying impedances, noise, lime variant impedances, ail represent challenges to data transmission. In addition, these environmental variables create the possibility of latency, something unacceptable to a listener of audio content. An example of techniques used to improve the quality of power line communications include United States Patent 7,106, 177 to Logvmov and Eberf entitled "Method and System For Modifying Modulation of Power Line Communications Signals For Maximizing Data Throughput Raie'\ United States Patent Application Publication US2007/0022197 to Logviuov and Ebert entitled "'Method And System For Distributed Audio With Location Based Control Management, and Delivery", the entire disclosures of which axe incorporated herein by reference. The present invention is not intended to be limited to a given standard for power line communications, hut rather, includes all forms of power line communications and the resulting standards that are developed therefrom.

The power line communication element 601 depicted in figure 6 may use, in one embodiment of the present invention, orthogonal frequency division multiplexing (OFDM) as the basic transmission technique. Orthogonal frequency division multiplexing (C)FDM) is known to those skilled in the art. and has been used in forms of power line communications as well as Digital Subscriber Line (DSL) communications. Digital Subscriber Line Communications has been described by Starr, Cioffh and Silverman in "'Understanding Digital Subscriber Line Technology^"*, published by Prentice Hall in ! 999. Orthogonal frequency division multiplexed waveforms are typically generated through the use of an inverse fast fourier transform (IFFT) where the frequency domain points arc made up of a set of complex symbols that modulate each carrier. The swd result of this Inverse fast fourier transform process is an orthogonal frequency division multiplexed (OFDM) symbol, At a receiver, such as a receiver contained in the power line communication element 601 depicted in figure 6, the data can be recovered through the use of a fast fourier transform (FFT) and converted back to the frequency domain for later use in elements of the intelligent audio speaker of the present invention. In one embodiment of the present invention, the power Sine communication element 601 uses the Homeplug 1 ,0,1 standard, developed by the HoracPlug Power line Alliance, a not for profit corporation established to provide a forum for the creation of open specifications for high, speed home power line networking products and services. Information about the HomePlug Power line Alliance can be found at www.homepiug.org. HomePlug 1.0.1 uses orthogonal frequency division, multiplexing (OFDM) in a burst mode rather than in a continuous mode. Homeplug 1.0, 1 technology also uses concatenated Viierbi and Reed Solomon forward error correction (FSiiC) with interleaving for pay load data, and turbo product coding (FFC") for sensitive control data fields. HomePlug 1.0.1 uses the media access control (MAC) protocol , a variation on carrier sense multiple access with collision avoidance (CSMA/CA). The HomePlug 1 ,0,1 data bearing packet contains a scries of orthogonal frequency division multiplexed (OFDM) symbols containing a start-of-frame delimiter, a payload. and an end-of-frame delimiter. Frame control contains media access control (MAC) layer management information such as packet lengths, response status, and the like. The pay load portion of the packet is carried on a set of carriers that have been previously determined during a channel adaptation procedure by the transmitter and intended receiver, such as the power line communication element 601 in figure 6. This payload portion is intended only for a specific destination receiver. The HomePlug 1,0.1 physical layer (PHY) occupies a frequency band from 4.5 Mhz, to 21 Mbz. The HomePlug Power line Alliance is continuing to develop new and varying standards for power line commυnicaiion, and the inventive concepts expressed herein are applicable to any device built to these standards. As noted previously, the use of the current and evolving Hoπieϊ'iug standard is meant to provide

10 teaching by way of example, and not limitation, sufficient to allow one skilled in the art to make and use the present invention. Other forms, versions, and improvements to power line communications are expected and included in the various embodiments of the present invention as described by way of this specification and the attached claims.

Referring again to figure 6 and the block diagram contained therein, digital audio signals are received from a network 603 by the power fine communication element 601. In some embodiments of the present invention, a timing signal such as a global timing signal is passed from the network 603 to the power line communication element 601. or provided by way of the power line communication element 601. and converted from a digital signal to an analog signal by way of a digital to analog conversion element 605. The digital to analog conversion element 605 may, in some embodiments, be contained within the power line communication element 60! . In other embodiments of the present invention, ihe digital to analog conversion element 605 is external to the power Line communication element 6Oi . Sn other embodiments of the present invention, a digital amplifier is employed that may contain an integral digital to analog conversion element, and may, in some embodiments of the present invention, take the place of the audio amplification clement 607, A digital to analog converter takes a digital signal and converts it to an analog signal. Such devices are known in the art, and typically convert finite-precision numbers into an analog output signal. Most audio content is currently stored in digital form, and a digital to analog converter is required for the audio content to be heard through speakers requiring an analog signal. Various types of Digital to Analog (D/A) converters include Pulse Width Modulated digital to analog converters, oversampling digital to analog converters such as delta sigma, binary weighted digital to analog converters. R-2R ladder digital to analog converters, and the like. An example of audio digital to analog converters are the family of digital to analog converters made by Analog Devices, Inc. Examples include Analog Devices part number AD 1955 Multilist Signia-Delta D/A w/SACD Playback, Analog Devices part number AD 1852 Stereo, 24-bit 192 kHz. Multibit Sigma-Delta D/A (voltage output). Analog Devices part number A D 1854 Complete Single ("hip Stereo Audio D/A, and the like. Other Digital to Analog Converters available from other manufacturers may also be used.

Once the digital audio content is received by the power line communication element 601 and converted to an analog audio signal 605 by way of a digital to analog conversion element 605, ihe analog audio signal is then amplified by way of an audio amplification element 607. The audio amplification element 607 amplifies low power audio signals received from the digital to analog conversion element 605. Audio signals include primarily frequencies between 20 hertz and 20,000 hertz, which is the range of human hearing. The amplified audio signals of the audio amplification element 607 are suitable for driving audio speakers, which are most commoπiy the final stage in an audio content delivery system. The audio amplification element 607 may contain an audio amplifier as well as, in some embodiments of the present invention, filters, pre-amplifiers, equalizers, tone controls, mixing and effects, or digital .signal processing enhancements. An example of such digital signal processing enhancements is the line of Spider series amplifiers manufactured by Lineβ of Calab&sas, California (_.wwwiinc6.co_.n5}. Audio amplifiers that may be used in the audio amplification element 607 Include all forms of discrete silicon. Integrated silicon, analog, digital as well as vacuum tube technologies. Integrated circuits are readily available for the purpose of constructing a suitable audio amplification element, such as the amplifier integrated circuits manufactured by National Semiconductor, for example, the LM48XX series integrated circuit amplifiers by National Semiconductor. In addition, discrete component amplifiers using power transistors. Bipolar junction transistors. Field effect transistors, high gain darlington pairs, and the like, may also be used in the audio amplification element 607. Amplifier stages may include class A, class B, class AB, and the like. The term audio amplification element includes not only the audio amplifier itself, but also components that work in compliment with the audio amplifier, such as, for example, filters, equalizers, digital signal processors, negative feedback loops, crossover circuits, special effects, and the like.

Figure 6 also shows a power supply element 61 1 that converts alternating current power to direct current that is suitable for use by the various elements of figures 6, 7 and 8. Power supplies are known to those skilled in the art. Reference may be had, for example, to power supplies manufactured by Astee Power ( www.astee..com K Other power supplies known to those skilled in the art may also be used. Lastly, in figure 6, an audio speaker 609 is depicted. The audio speaker 609 is driven from the audio amplification element 607» Figure 6 shows a single audio speaker in block diagram form, and may include, in some embodiments of the present invention, multiple speakers such as a tweeter, woofer, midrange. horn, and the like. Speakers are commonly electromechanical devices thai convert an electrical signal into sound. T here are many types of speakers that use the moving coil effect, the cone speaker being the most common, Other types of audio speakers include the piezoelectric speaker, plasma arc speakers, Heil air motion transducers, electrostatic loudspeakers, and the like.

Figure 7 is a block diagram of the basic functional elements of the intelligent audio speaker with an ambient light emitter element. An ambient light emitter element 701 is present In some embodiments of the present invention. The purpose of the ambient light emitter

[2 element 70! is to provide a novel and unique audio listening experience by way of light being aesthetically displayed in proximity to the intelligent audio speaker. The light may modulate in intensity as the spectral content (including frequency and amplitude} of the audio changes with respect to time. In some embodiments of the present invention, the light may change color as the spectral content of the audio changes with respect io time. Other variations of the backlight effect may include multiple color lights, lights that turn on and off. and the like. The ambient light emitter clement 701 contains circuitry that allows an audio output signal from the audio amplification element 607 (shown as a dotted line} or one or more control output signals from the power line communication element 6Oi (also shown as a dotted line) to modulate a lamp or lamps 703 in amplitude, frequency, color, or a combination thereof. The modulation may, in some embodiments, be controlled by a user, by way of, for example, a remote control unit 613. In this embodiment, the remote control codes would be interpreted by the power line communication element 601, and resulting control signals would be sent to the ambient light emitter element 7Oi. The lamps 703 may also, in some embodiments of the present invention, represent different colors or may change colors with respect to time or frequency. Compensation for inherent startup delays in some lamps is done by way of timing circuitry that includes, for example, capaeitive coupling to minimize delays between the audio output signal and the illumination of the lamps. Lamps may include incandescent, filament, fluorescent, gas discharge, neon, light emitting diode, electroluminescent, laser, and the like. The modulation of the lamps in the ambient light emitter element 701 is accomplished, in some embodiments of the present invention, by way of an analog driver circuit such as an amplifier. An example of such a circuit would be a class A audio amplifier using two NI⁵N transistors such as 2N4401 scries transistors with the collectors tied together and the base of the first transistor receiving an audio input signal through an input capacitor and resistor. Λn NPN power darlington transistor with the base input tied to the collector of the second 2N440I or similar transistor is used to drive the lamp 703 in modulation with the input audio signal. This circuit is set forth by way of example, and not limitation. Other driver circuits known to those skilled in the art may be used. In addition, in some embodiments of the present invention, multiple driver circuits may be used with various bandpass, bandstop, or notch filters to drive a series of lamps 703, using, for example, different colors to represent different frequency ranges. In yet another embodiment, integrated circuits thai are designed to drive one or more LEDs, or other illumination devices, such as devices from Fairehiki Semiconductor (www, fairehildsemi.com), may be used, with control signaling for the device being generated from the power line communication element 601. Referring now to figure 8. a block diagram of the basic functional elements of the intelligent audio speaker with an ambient light emitter element and with a processing dement is shown. The processing element 801 is connected to the power line communication clement 601 in some embodiments of the present invention, and serves to provide additional control to the intelligent audio speaker. This control may include additional nser defined parameters, and may, in some embodiments of the present invention, be accessed by way of a remote control 613. The processing clement 801 may include a microprocessor and memory, and may execute commands such as software routines, and may. in some embodiments of the present invention, allow updates and changes to the software routines by way of the power line communications network.

Figure 9 is a diagram of a typical audio/video distribution network using power line communications. Power lines 901 are depicted with receptacles 903, such as- for example, the electrical receptacles manufactured by Lεviton, such as a NEMA 5-15R₅ 15 amp. 125 volt. Decora Plus Duplex receptacle. Sources of audio content in figure 9 include a Compact Disc Player 905, an MSM Player 907. and the like. Each of these source devices contains a power line communication clement that provides the intermediary between the audio signal and the power line network. Receivers of the audio content include intelligent speakers 909 and 911, as described herein. In addition, combined audio and video may be distributed by way of a power line communication network. Depicted in figure 9 by way of example- and not limitation, are a TV/Video 913, a digital picture frame 915. a digital media adapter 917. and a stereo receiver amplifier 919. Figure 9 is provided by way of example and to assist with an understanding of how the present invention may be used. Devices connected to a power line communication network may vary based on the interests of the user, and such variation docs not in any way depart from the spirit and broad scope of the present invention as described in this specification and the attached claims.

It is, therefore, apparent that there lias been provided, in accordance with the various objects of the present invention, an apparatus for connecting audio speakers to a digital network. While the various objects of this invention have been described in conjunction with preferred embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications and variations that fall within the spirit and broad scope of this specification arid the appended claims,

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Claims

What is claimed is:

L An intelligent audio speaker comprising;

A power Hue communication element having a digital output; a digital to analog conversion element operatively coupled to the digital output of the power line communication element for converting a digital audio signal to an analog audio signal; an audio amplification clement operatively coupled to said digital, to analog conversion element; and an audio speaker driven by said audio amplification element.

2. The intelligent audio speaker as recited in claim I - wherein the power line communication element is a system on a chip.

3. The intelligent audio speaker us recited in claim 1 , further comprising a processing element.

4. The intelligent audio speaker as recited in claim 3, wherein the processing element is contained on a system on a chip.

5. The intelligent audio speaker as recited in claim 1 , further comprising an ambient light emitter element,

6. The intelligent audio speaker as recited in claim 5, wherein lhe ambient light emitter element is driven by the power line communication element,

7. The intelligent audio speaker as recited in claim S, wherein the ambient light emitter element is driven by the analog audio signal.

8. The intelligent audio speaker as recited in claim 5, wherein the ambient light emitter element contains light emitting diodes,

9. The intelligent audio speaker as recited in claim 5, wherein the ambient light emitter element contains filament lamps.

[ S LO. The Intelligent audio speaker as recited in claim 5. wherein the ambient light emitter element contains gas discharge Samps.

11. The intelligent audio speaker as recited in claim 5, wherein the ambient Sight emitter element can be adjusted by user input.

12, The intelligent audio speaker as recited in claim 5, wherein the ambient light emitter element is automatically adjusted based on spectral information of the digital audio signal.

S 3. The intelligent audio speaker as recited in claim 5. wherein the ambient, light emitter element is automatically adjusted based on spectra! information of the analog audio signal.

, A retrofit kit for converting a conventional audio speaker to an intelligent audio speaker, the retrofit kit comprising; a power line communication element having a digital output; a digital to analog conversion element operatively coupled to the digital output of the power line communication element for converting a digital audio signal into an analog audio signal; and an audio amplification element having an input and an. output, the input being operatively coupled to said digital to analog conversion element and the output being electrically connected to a conventional audio speaker.

, The retrofit kit as recited in claim 14, wherein the power line communication element is a system on a chip.

, The retrofit kit as recited in claim 14, further comprising a processing element.

, Tlie retrofit kit as recited in claim 16, wherein the processing element is contained on a system on a chip.

, The retrofit kit as recited in claim 14. further comprising an ambient light emitter element.

16

19. The retrofit kit as recited hi claim 18, wherein the ambient Sight emitter element is driven by the power line communication element

20. The reirofϊi kit as recited in claim 18, wherein the ambient Sight emitter element is driven by the analog audio signal.

21. Hie retrofit kit as recited in claim 18. wherein the ambient light emitter element contains light emitting diodes,

22. The retrofit kit. as recited in claim 18, wherein the ambient light emitter element contains filament lamps,

23. The retrofit kit as recited in claim I S, wherein the ambient light emitter element contains gas discharge lamps.

24. The retrofit kit as recited in claim 18, wherein the ambient light emitter element can be adjusted by user input.

25. The retrofit kit as recited in claim 18, wherein the ambient Sight emitter element is automatically adjusted based on spectral information of the dlgitaS audio signal

26. The retrofit kit as recited in claim IB, wherein the ambient Sight emitter clement is automatically adjusted based on spectral information of the analog audio signal,

27. A system for distributing audio signals using power lines, tSie system comprising: a source of audio content in communication with a power Sine communication element, the power line communication element being operattvely connected to said power Sines; and an intelligent audio speaker having a power line communication element, the power line communication element being operatively connected to said power lines.

28. The system as recited in claim 27, wherein the power line communication element is a syste.ni on a chip.

[ ?

29. The system as recited in claim 27, further composing a remote control for modifying the audio content.

30. The system as recited in claim 27. further comprising a device for automatic assignment of channels among the source of audio cement and the intelligent audio speaker.

3 L The system as recited in claim 27, further comprising a device for user controlled assignment of channels among the source of audio content and the intelligent audio speaker.

32. The system as recited in claim 27, further comprising an ambient fight emitter element.

33. The system as recited in claim 27, further comprising a processing element.

34. An intelligent audio speaker comprising: a power line communication element for transmitting and receiving audio signals over conventional electrical wiring; an audio amplification element operative!}' coupled to said power Sine communication element; and an audio speaker driven by said audio amplification element.

35. The intelligent audio speaker as recited in claim 34, wherein the power line communication element is a system on a chip.

36. The intelligent audio speaker as recited in claim 34, further comprising a digital to analog conversion element operatively coupled to a digital output of the power line communication element for converting a digital audio signal to an analog audio signal and an audio amplification element operatively coupled to the digital to analog conversion element.

[8

37. The intelligent audio speaker as recited in claim 34, further comprising an audio amplification clement operatively coupled to an analog output of the power line communication element and an audio speaker driven by the audio amplification element

38. The intelligent audio speaker as recited in eϊaim 34» further comprising an audio amplification element having a digital input operatively coupled to a digital output of the power line communication clement and an audio speaker driven by the audio amplification element.

39. The intelligent audio speaker as recited in claim 34 wherein the audio amplification element is an analog amplifier.

40. The intelligent audio speaker as recited in claim 34 wherein the audio amplification element is a digital amplifier.

41. The intelligent audio speaker as recited in claim 34 further comprising an ambient light emitter element,

42. The intelligent audio speaker as recited in claim 41 wherein light emitted by the ambient light emitter element is controlled by signal level and spectral content of said audio signal.

43. ^'The intelligent audio speaker as recited in claim 41 wherein light emitted by the ambient light emitter element is controlled by the power line communications element using signal level and spectral content of said audio signal,

44. The intelligent audio speaker as recited in claim 41 wherein light emitted by the ambient light emitter element is controlled by the digital to analog conversion element using signal level and spectral content of said audio signal.

45. The intelligent audio speaker as recited in claim 41 wherein light emitted by the ambient light emitter element is controlled by the audio amplification element using signal level and spectral content of said audio signal.

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46. The intelligent audio speaker as recited in claim 42 wherein the audio signal is a digital signal,

47. The intelligent audio speaker as recited in claim 42 wherein the audio signal is an analog signal.

48. A retrofit kit for converting a conventional audio speaker to an intelligent audio speaker, the retrofit kit comprising: a power line communication element for transmitting and receiving audio signals over conventional electrical wiring: an audio amplification element operative!)? coupled to said power line communication element; and an audio speaker driven by said audio amplification element.

49. The retrofit kit as recited in claim 48, wherein the power line communication element is a system on a chip.

50. The retrofit kit as recited in claim 48. further comprising a digital to analog conversion element operaiively coupled to a digital output of the power line communication element for converting a digital audio signal to an analog audio signal and an audio amplification element operaiively coupled to the digital to analog conversion element.

51. The retrofit kit as recited in claim 48, further comprising an audio amplification element operatively coupled to an analog output of the power line communication element a.nd an audio speaker driven by the audio amplification element.

52. The retrofit kit as recited in claim 48, further comprising an audio amplification element having a digital input operatively coupled to a digital output of the power line communication element and an audio speaker driven by the audio amplification element,

53. The retrofit kit as recited in claim 4S wherein the audio amplification element is an analog amplifier.

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54. The retrofit kit as recited in claim 48 wherein the audio amplification element is a digital amplifier.

55. The retrofit kit as recited in claim 48 further comprising an ambient light emitter clement.

56. The retrofit kit as recited in claim 55 wherein light emitted by the ambient light emitter element is controlled by signal level and spectral content of said audio signal.

57. The retrofit kit as recited in claim 55 wherein fight emitted by the ambient fight emitter element, is controlled by the power line communications element, using signal level and spectral content of said audio signal,

58. The retrofit kit as recited in claim 55 wherein light emitted by the ambient light emitter element is controlled by the digital to analog conversion element using signal level and spectral content of said audio signal.

59. The retrofit kit as recited in claim 55 wherein light emitted by the ambient light emitter element is controlled by the audio amplification element using signal level and spectral content of said audio signal.

60. The retrofit kit as recited in claim 55 wherein the audio signal is a digital signal.

61. The retrofit kit as recited in claim 55 wherein the audio signal is an analog signal.

62. AΆ intelligent audio speaker comprising: a system on a chip having a power line communication element; an audio amplification element operatlvely coupled to said system on a chip; and an audio speaker driven by the audio amplification element.

63. The intelligent audio speaker of claim 62 wherein said audio amplification element is contained on a system on a chip.

2!

64. The intelligent audio speaker of claim 62 further comprising a digital to analog conversion element contained on said system on a chip.

65. The intelligent audio speaker of claim 62 further comprising an ambient light emitter element contained on said system on a chip,

66. The intelligent audio speaker of claim 62 further comprising a processing element contained on said system on a chip.