306 results about "Tv tuner" patented technology

A bi-directional communication system comprising a base apparatus and a display apparatus. The display apparatus is a portable liquid crystal display for viewing video programs and browsing the internet. The base apparatus contains a television tuner for receiving broadcast signals and wirelessly transmits programming to the display apparatus. An infrared remote control device connected to the base apparatus is used to control various external input devices (e.g., a VCR or DVD player). Control menus for the base apparatus and the external input device can be displayed on the display apparatus. The display apparatus contains a touch screen, so that a user can select operational commands for controlling the base apparatus and external input devices. The display apparatus wirelessly transmits selected operational commands to the base apparatus, which then retransmits the commands to the appropriate external input device using the infrared remote control device.

A portable audio video electronic recording, storage and playback device. A user can store their music or movies and view them on the built-in color display or on a television. Video can be recorded and stored from any video source. Digital photographs or video can be captured via a built-in camera. A built-in TV tuner provides viewing and recording of television programming. Music can also be recorded from a stereo or computer and played back anytime and anywhere. The audio can be listened to with headphones, with the built-in speaker, or by connecting the device to a stereo. An image viewer allows digital photos to be stored and viewed on the device. Images can be easily transferred between the device, digital cameras and computers. A hard disc drive and memory card port are provided for storing data. An infrared port provides remote control and wireless connectivity.

A multifunction display system is provided comprising a flat panel display screen; an electronic controller receiving video signal from an input and generating an output signal for displaying on the display screen; a power supply providing power to display screen and the electronic controller; a housing securing the display screen, the electronic controller and the power supply, wherein the housing includes a front shell and a rear shell that join together at a meeting line along a periphery of the display screen. The rear shell of the housing is a designed panel to receive multiple devices of specialized media playing capabilities in standardized boxes including but not limited to a regular or HD television tuner, a DVD and optical disc player, a digital video recorder, a hard drive player or an IPTV Divx player, mini PC and Internet and/or receiver router.

A centralized resource manager for distributed networks manages resources available on the network, such as network bandwidth, CPU allocation, TV tuners, MPEG encoders and decoders, disk bandwidth, and input/output devices. The centralized resource manager also allocates the resources of network clients and a network-associated media server, in response to requests for media services via the distributed network. The centralized resource manager may include means for discovering when devices are added or removed from the network; a current, IR, or electromagnetic field sensing system for determining when video devices are turned off so that resources associated with any device not in use may be reallocated elsewhere; or a power switching system for controlling the ON or OFF state of such devices so that resources associated with any device in the OFF state may be reallocated elsewhere.

A television tuner (920) is adapted for use in a television receiver (900) that receives a radio frequency (RF) signal from an input device (910) and outputs audio and video information from a selected channel in response thereto. The television tuner (920) includes a direct digital frequency synthesizer (206) and a mixer (220). The direct digital frequency synthesizer (206) has an output for providing a digital representation of a mixing signal. The mixer (220) has a signal input for receiving a television signal, a mixing input coupled to the output of said direct digital frequency synthesizer (206), and an output for providing an intermediate frequency (IF) television signal.

An information processor includes an operation unit for receiving a selected analog television channel, an identification signal generator for generating, from the selected channel, an analog identification signal for identifying the frequency of an analog broadcast signal, an identification signal acquirer for acquiring the analog identification signal, a storage for prestoring correspondence information between a digital identification signal indicating a frequency of a digital broadcast signal and the analog identification signal for each of stations, an identification signal converter for converting the analog identification signal into the digital identification signal using the correspondence information, a receiver for receiving a digital broadcast signal identified by the digital identification signal and extract video and audio code, a video converter and an audio converter for converting the code into equivalent analog video and audio signals, and an analog video acquirer and an analog sound acquirer for acquiring the analog video and audio signals.

A television (10) for use in a home cinema or surround sound system is provided with an additional audio input (58) for a center audio channel signal from a multi-channel surround sound receiver/amplifier (38). Through system control logic, a control and switching stage (28) within the television couples (72) the televisions internal audio channel signal processing and amplifier stages (G_TV,A_TV) in parallel to the input (58) when in the surround sound mode, at the same time disabling the audio signal path from the televisions tuner (60) to the audio signal processors (G_TV,A_TV) and setting (74) the volume level on all channels to a predetermined level to allow volume control (63) from the remote source (38). A home cinema system featuring such a television configuration is also described.

A complex bandpass-notch filter is disclosed. It provides both bandpass filtering and image rejection, in complex frequency domain, along with a quadrature signal generation. Consequently, this complex bandpass-notch filter provides the both functions of a bandpass filter and a passive polyphase filter. The complex bandpass-notch filter can be used for RF receivers and integrated TV and cable tuners. A low-IF single-conversion integrated tuner and a zero-IF direct-conversion integrated tuner incorporating with this complex bandpass-notch filter are disclosed for terrestrial and cable systems.

On an information registering equipment, content of interest rendered by media, such as a video image of interest distributed by TV broadcasting is captured and displayed. Position/area on the image are defined with a mouse or the like to obtain the target position/area. Information to identify the content is obtained from the TV tuner. Reference information is obtained through input means or by retrieval from the server for reference information. The obtained information specifics are transmitted to an information search equipment that in turn stores then into its database. An information viewing equipment obtains the target position/area and information to identify the content of interest and transmits the thus obtained data to the information search equipment. The information search equipment matches that data with each data record in the database and transmits reference information to the information viewing equipment on which the reference information is displayed.

An apparatus to aid in the replaying of previously transmitted video signals for the purposed of reviewing missed information on a television receiver is disclosed. Comprising a television tuner whose output signal passes through a video recording system, it utilizes conventional recording technology with the use of a continuous loop tape. The output signal from the tuner is also passed on to a television monitor under normal, standby operation. In the instance where a viewer wishes to review a just viewed signal, such as might occur during a missed word or word sequence such as a telephone number, the viewer is able to switch over to the stored signal on the videotape for a replay of said signal. The replay will continue as many times as desired by the viewer until all necessary information is absorbed. The stored sequence time duration is variable in nature and user selectable. The viewer may view the replayed signal in a picture-in-picture window or may view the replayed signal on the full screen. When completed, the viewer would switch back to real time viewing at which point the video recording process would begin anew. The viewer also has the option of viewing one selected image on a continuous "stop frame" basis and also has the option of producing a hard copy, printed image from an integral printing means.

The invention relates to an automatic testing method of mixer third-order intermodulation distortion inside a radio frequency tuner chip, in particular to an automatic testing method of mixer third-order intermodulation distortion inside a DVB-C digital television tuner chip. The automatic testing method adopts the radio frequency apparatus made by Agilent Company as the testing platform. The main equipment of the testing method comprises an Agilent spectrum analyzer E4402B, an Agilent vector signal generator E4438C, an Agilent digital power supply E3649A, an Agilent GPIB link module 82357A and a computer. By means of the IEEE488 communication protocol, the programmable apparatus standard command (SCPI) and chip I<2>C control protocol, test software controls the operating state of the chip and sets and reads relevant parameter of a testing apparatus through the read-write operation of a register arranged inside a tuner chip, thereby realizing automatic radio frequency testing. In addition, the test software consists of an IEEE488 drive module, a parallel port drive module, an I<2>C module and a mixer test module.

In an in-vehicle image display system, each of a car navigation device and a rear-seat display device includes an own image-drawing IC. The car navigation device interfaces with a TV tuner and a DVD player. When receiving a request signal from the rear-seat display device, the car navigation device forwards relevant image data to the rear-seat display device using a dedicated line. The rear-seat display device converts the forwarded image data to image signals using the own image-drawing IC to thereby display them. Thus, the car navigation device and the rear-seat display device can display different display window images with a simple system structure where no image-drawing IC used for the rear-seat display device is provided within the car navigation device.

A method and system for providing a wireless LAN service using a rental digital television is provided. When a wireless-LAN-embedded digital television leased to a first user is turned on, the digital television accesses a management authentication server using a service server included in the digital television to determine whether or not the first user is a lease service subscriber. A TV tuner of the digital television is activated if the first user is a lease service subscriber. When a terminal of a second user has accessed an access point of the digital television, the digital television accesses the management authentication server using the service server to determine whether or not the second user is a wireless LAN service subscriber. A wireless LAN service is provided to the terminal of the second user if the second user is a wireless LAN service subscriber.

This invention discloses a TV set-top-box including a data communication interface memory card fetch interface memory card fetch interface, a master CPU device, a memory, a programmable video output interface, a power supply, a remote control input interface, a remote controller and a TV tuner, among which, the data communication interface is connected with a cell phone, the memory card fetch interface is plugged with cards, the programmable video output interface is connected with the TV, the supply is connected with external AC power, the tuner is linked to the wire TV line to realize on-line information browse on TV or with program selection with the help of wireless log-on to the net function of cell phones or UNLD function of memory cards.

An integrated tuner circuit includes a first terminal to which a UHF TV signal is input via a UHF amplifier. The amplifier is switched to an operating state when a UHF TV signal is received. A switching-voltage generation circuit includes a first switching circuit for generating a switching voltage used to switch the operating state of a UHF high-frequency amplifying circuit. The switching voltage of the first switching circuit is output to the first terminal