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US6559866B2
Referring now to FIG. 2, there is shown an interactive television system 200 according to an embodiment of the invention. As depicted, the system 200 may include an STB 102, a television 104 (or other display device), a remote control 106, and, in certain configurations, a keyboard 108.
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US6559866B2
The remote control 106 is provided for convenient remote operation of the STB 102 and the television 104. In one configuration, the remote control 106 includes a wireless transmitter 202 for transmitting signals to the STB 102 and the television 104. Likewise, the remote control 106 includes a wireless receiver 204 for receiving signals from the STB 102.
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US6559866B2
In one embodiment, the wireless transmitters 202 and receivers 204 are configured to use radio frequency (RF) signals. In other embodiments, infrared (IR) or other frequencies along the electromagnetic spectrum may be used. Operational details regarding the wireless transmitters 202 and receivers 204 are generally well known to those of skill in the art.
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US6559866B2
The remote control 106 preferably includes a number of buttons or other similar controls. For instance, the remote control 106 may include various standard buttons, such as a power button 206, an up arrow button 208, a down arrow button 210, a left arrow button 212, a right arrow button 214, a “Select” button 216, an “OK” button 218, channel adjustment buttons 220, volume adjustment buttons 222, alphanumeric buttons 224, and the like.
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US6559866B2
Additionally, the remote control 106, in one configuration, may includes a number of buttons specifically-designated for activating various interactive options. These buttons may include, for example, a “Help” button 226, an information button 228, a “Buy” button 230, an e-mail button 232, as well as other buttons 234, 236, 238, 240 designated to activate specific interactive options.
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US6559866B2
In one embodiment, the remote control 106 includes a microphone 242 for capturing an audio signal. The captured audio signal is preferably transmitted to the STB 102 via the wireless transmitter 202. In addition, the remote control 106 may include a speaker 244 for generating audible output from an audio signal received from the STB 102 via the wireless receiver 204.
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US6559866B2
The various components of the remote control 106 may be positioned in different locations for functionality and ergonomics. For example, as shown in FIG. 2, the speaker 244 may be positioned near the “top” of the remote control 106 (when viewed from the perspective of FIG. 2) and the microphone 242 may be positioned at the “bottom” of the remote control 106. Thus, in one embodiment, a user may conveniently position the speaker 244 near the userʼs ear and the microphone 242 near the userʼs mouth in order to operate the remote control 106 in the manner of a telephone. In alternative embodiments, as described below, the speaker 244, the microphone 242, and/or the video camera 246 may be disposed within the STB 102, the keyboard 108, the television 104, and/or other suitable locations.
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US6559866B2
Alternatively, or in addition, a hands-free headset 248 may be coupled to the remote control 106 or keyboard 108. The headset 248 may be coupled using a standard headset jack 250. The headset 248 may include a microphone 242 and/or speaker 244. Such a headset 248 may be used to reduce audio interference from the television 104 (improving audio quality) and to provide the convenience of hands-free operation.
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US6559866B2
In certain embodiments, the remote control 106 includes a video camera 246, such as a CCD (charge-coupled device) digital video camera. The video camera 246 allows a user to capture and send video signals to the STB 102. For example, the video camera 246 may capture images of a customerʼs screen to aid a support technician in resolving the customerʼs problem. In one implementation, the video camera 246 is in electrical communication with the wireless transmitter 202 for sending the captured video signal to the STB 102. Various techniques for encoding and transmitting video signals may be used that are well known to those skilled in the art.
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US6559866B2
The optional keyboard 108 facilitates rapid composition of text messages. The keyboard 108 includes a plurality of standard alphanumeric keys 252 arranged in a suitable format, such as “QUERTY” or “DVORAC”. In one configuration, the keyboard 108 includes a wireless transmitter 202, similar or identical to the wireless transmitter 202 of the remote control 106. The wireless transmitter 202 transmits keystroke data from the keyboard 108 to the STB 102. Additionally, the keyboard 108 may include one or more of the buttons illustrated on the remote control 106.
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US6559866B2
In one implementation, the buttons and audio/video components of the remote control 106 are in electrical communication with the wireless transmitter 202 and/or the wireless receiver 204 for communicating with the corresponding wireless receiver 204 and/or wireless transmitter 202 within the STB 102. Such communication may be according to the IEEE 802.11a or 802.11b Wireless Networking standards, the “Bluetooth” standard, or according to other standard or proprietary wireless techniques. The wireless transmitter 202 and wireless receiver 204 may include various additional components not specifically illustrated but well known in the art.
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US6559866B2
Referring now to FIG. 3, there is shown a physical block diagram of an STB 102 according to an embodiment of the invention. As noted above, the STB 102 includes a wireless receiver 204 for receiving control signals and audio/video signals sent by the wireless transmitter 202 in the remote control 106.
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US6559866B2
The STB 102 also includes, in one implementation, a network interface 302 for communicating with the broadband communication network 101 via the head-end 110. The interface 302 may include conventional tuning circuitry for receiving MPEG (Moving Picture Experts Group) packets for a selected television channel. The interface 302 may also include conventional cable modem circuitry for sending or receiving other types of data. For example, the interface 302 may conform to the DOCSIS (Data Over Cable Service Interface Specification) or DAVIC (Digital Audio-Visual Council) cable modem standards. In one embodiment, a CMTS-DRFI (Cable Modem Termination System-Downstream RF Interface) may be used in conjunction with a CMTS-URFI (Cable Modem Termination System-Downstream RF Interface) to establish two-way communication between the STB 102 and the head-end 110.
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US6559866B2
In one configuration, one or more frequency bands (for example, from 5 to 30 MHz) may be reserved for upstream transmission. Digital modulation (for example, quadrature amplitude modulation or vestigial sideband modulation) may be used to send digital signals in the upstream transmission. Of course, upstream transmission may be accomplished differently for different networks 101. Alternative ways to accomplish upstream transmission include using a back channel transmission, which is typically sent via an analog telephone line, ISDN, DSL, or other techniques.
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US6559866B2
The STB 102 also preferably includes a CODEC (encoder/decoder) 304. The CODEC 304 serves to encode signals (such as audio/video signals) into a network-compatible data stream for transmission over the network 101. The CODEC 304 also serves to decode a network-compatible data stream received from the network 101. As depicted, the CODEC 304 may be implemented as a hardware component. Alternatively, or in addition, software encoding and decoding may be used. The CODEC 304 may use various algorithms, such as MPEG, for encoding and decoding.
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US6559866B2
The STB 102 further includes a memory device 306, such as a random access memory (RAM), configured to store data for temporary use. Similarly, a read-only memory (ROM) may be provided for storing more permanent data, such as fixed code and configuration information.
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US6559866B2
In one embodiment, an audio/video (A/V) controller 308 is provided for converting decoded digital audio/video information into analog signals for display/playback on the television 104 or other devices. The AN controller 308 may be implemented using one or more physical devices, such as a separate graphics and audio interfaces. In alternative embodiments, the AN controller 308 may provide a direct, digital video output for televisions 104 or other devices equipped to receive the same. Preferably, the A/V controller 308 includes graphics hardware for performing bit-block transfers (bit-blits) and other graphical operations. Additionally, the A/V controller 308 preferably includes hardware components for generating voice synthesized sounds from digital or analog input signals.
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US6559866B2
In some implementations, the STB 102 may include a storage device 310, such as a hard disk drive or the like. The storage device 310 may be configured to record encoded television broadcasts and retrieve the broadcasts at a later time for decoding by the CODEC 304 and display by the AN controller 308.
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US6559866B2
The storage device 310 may also be used in various embodiments to store viewer preferences, parental lock settings, electronic programming guide (EPG) data, programming preferences, passwords, e-mail messages, and the like. In one implementation, the storage device 310 also stores an operating system (OS) for the STB 102, such as Windows CE® or Linux®.
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US6559866B2
A CPU 312 controls the operation of the STB 102, including the other components thereof, which are coupled to the CPU 312 via a bus 314. The CPU 312 may be embodied as a microprocessor, a microcontroller, a digital signal processor (DSP) or other device known in the art. As noted above, the CPU 312 may perform logical and arithmetic operations based upon control signals generated by the remote control 106 and transmitted to the receiver 204.
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