378 results about "Analog television" patented technology

A system for transmitting digital programming includes a program source providing digital information, circuitry for modulating the digital information onto a visual carrier modulated with analog television programming, and a visual transmitter coupled to the modulating circuitry. Using a phase modulation method, the system phase modulates the digital information onto a visual carrier, reduces the baseband frequencies of the phase modulated visual carrier, and amplitude modulates the phase-modulated video carrier onto a video signal. The amplified and encoded video signal are combined with an amplified sound signal and transmitted. Using an additive method, the system modulates the sidebands of the video carrier with the digital information and amplitude modulates the video signal onto the video carrier. The data-modulated sidebands are phase-shifted such that they will be in quadrature with the amplitude-modulated video signal. The system combines the amplitude-modulated video carrier and the data-modulated quadrature sidebands. With a blended multiplicative/additive method, the system provides phase modulation and quadrature sideband addition to provide an optimized result. Process, systems, circuits and devices for abating or otherwise correcting effects of the information on the analog television signal are also disclosed.

A single integrated circuit is provided to enable the distribution of voice, video, and/or data services throughout a multimedia distribution network, such as a cable communications network. The single integrated circuit supports both digital and analog television services (e.g., PVR, pay-for-view, EPG, e-commerce, etc.) and computer data services (e.g., telephony, Internet browsing, facsimile, messaging, videoconferencing, etc.). In an embodiment, the single integrated circuit includes three components that constitute a DOCSIS™ compliant cable modem, namely an inband demodulator, an upstream burst modulator, a media access controller, and a microprocessor. In an embodiment, a digital out-of-band demodulator is also included. In another embodiment, the single integrated circuit integrates front-end and backend set-top box functionality in addition to DOCSIS™ cable modem functionality.

A digital and analog television signal digitization and processing device that performs the digitization and processing functions using a common reference frequency source that is used to generate multiple subclock signals, wherein the reference frequency source is independent of any synchronizing characteristic of the input signal. For dual channel analog signal processing, the common frequency source is not locked to either channel/input signal. Digital signal processing is accomplished based on the same common reference frequency source. Advantageously, the present invention allows all of the analog-to-digital converters and decoder circuitry/logic necessary for simultaneously digitizing and processing several analog and digital television signals to be integrated on a single integrated circuit as well as eliminating duplicate frequency generation circuits.

Device and method for converting a format of a video signal in a digital TV receiver is provided. Format conversion can be carried out at one chip of a format converting device, inclusive of conversion of resolution, frame rate, scanning method, aspect ratio, color space, chroma format, and gamma correction. Therefore, the digital TV receiver is made to convert a wide range of video signals inclusive of, not only a digital TV broadcasting signal, but also analog TV broadcasting signal, and computer video signal, at one chip of system block. Moreover, the digital TV receiver is made to provide a variety of standards of format converted video signals, not only to the connected display, but also to other general video signal processing devices.

A method is proposed that is used for terrestrial transmission of at least one digital signal, in particular a digital radio and/or TV broadcasting signal. In this method, the at least one digital signal, reduced in its data quantity by coding, is modulated, preferably by the OFDM method, and converted into the frequency position of at least one channel, adjacent to at least one occupied or unoccupied channel (30, 32) for transmitting an analog TV broadcasting signal, and is broadcast in this frequency position. The dynamic scope and the amplitude of the spectrum (41) of the at least one digital signal must undershoot a respectively predetermined value that is markedly less than the dynamic scope or amplitude of the video carrier of the spectrum (35, 36) of the analog TV broadcasting signal, so that there will be only slight intermodulation and cross modulation with other digital signals or with analog signals of other channels. The spectrum (41) of the at least one digital signal is transmitted, separated from at least one adjacent channel (30, 31) by a protective frequency margin (45). When a plurality of digital signals are transmitted in the at least one channel (31), the frequency ranges of at least two digital signals are transmitted, separated from one another by a protective frequency margin (50).

A highly integrated terrestrial and cable tuner for receiving digital and analog television signals is disclosed. It achieves high performances in sensitivity, image rejection, dynamic range, channel selectivity and power consumption. A major-images rejection converter disclosed rejects third- and fifth-order images. Thus it significantly relaxes RF filter design in a tuner of a single-stage or a first-stage zero-IF/low-IF downconversion architecture. Different architectures and frequency planning are disclosed in accordance with specifications of TV standards to improve the overall performance of the tuner with a different or configurable IF output. The tuner is integrated by using standard processes, with minimal off-chip components excluding SAW and LC filters. Small tuner modules cost less than discrete (can) tuners. They can be used in digital/analog TV sets and portable and handheld TV devices and for mobile-phone TV reception.

Various embodiments of the invention provide apparatus, methods, and systems for effectuating an increase in the effective bandwidth of a cable television distribution plant in a manner compatible with most common cable television systems. By using methods and systems for simultaneously transmitting a standard analog television signal and a digital data signal in a manner that minimizes interference of each with the other, one or more data carriers may be embedded within one or more analog television channels in accordance with various aspects of the present invention. These combined signals can be transmitted transparently over the existing cable television distribution plant to a location at or near the subscribers so that, among other things, that the subscriber may "pause and resume" much in the way Personal Video Recorders work.

An electronic system that produces an enhanced spatial television-like audio-visual experience is disclosed. Unlike normal television, the system enables the viewer to control both the viewing direction and relative position of the viewpoint with respect to the movie action. In addition to a specific hardware configuration, this patent also relates to a new video format which makes possible this virtual reality like experience including a system by which multi-channel audio can be recorded in addition to visual information onto a single data channel which is compatible with existing television and audio-visual standards and an optical tracking system to provide both angular and spatial position information to control the display of said imagery and spatial audio.

A method, apparatus, and computer-readable media for determining the position of a user terminal comprises receiving, at the user terminal, a broadcast analog television signal comprising a chirp-type signal; and generating a pseudorange based on the chirp-type signal; and wherein the location of the user terminal is determined based on the pseudorange and a location of a transmitter of the broadcast analog 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.

The invention is applied in the field of embedded systems, and provides a television system, a television system starting method and a television system starting device. The television system comprises a Linux system and an android system, wherein the Linux system and the android system are based on the same core, and communicate with each other; the Linux system comprises an analogue television module; in the starting process of a television, the analogue television module displays television pictures after being started, receives and responds to the control operations of a user on the television before the android system is successfully started, and hands over system control rights to the android system after the android system is successfully started. By the television system, the television system starting method and the television system starting device, the problems of low android-system-based television starting speed and low user experiences are solved, and the user can rapidly start the television, watch the television pictures and operate the television.

This is an invention of computing and its applications, more specifically information systems, in the areas of user interface and interactive systems for distribution of videos and games, with applications in various segments of networking systems and tele-radio digital diffusion. Particularly, it is about to a dynamic visual browser and its method of operation, which allows users to interact with video playlists while videos are being reproduced, ensuring an individualized, intuitive, and continuous experience simulating the behavior of consumption of television content, which can be shared with other users.

A dual mode tuner/receiver is disclosed in which both analog and digital signals can be received and processed. A low pass filter allows all channels below a selected frequency enter the circuit. A precisely controlled dual conversion circuit creates an intermediate frequency (IF) signal. An automatic carrier detection circuit monitors the IF signal and determines whether the signal is of analog or digital format and intermediate frequency filters are adjusted based upon the type of signal detected. A coherent oscillator circuit generates in-phase and quadrature reference signals that are used by video and audio detectors for further processing of the IF signal. In-phase and quadrature outputs are provided for digital signals and composite video and audio outputs are provided for analog signals.

The invention relates to a video pre-monitoring technology, in particular to a self-adaptive multi-channel and multimode video pre-monitoring method used for hardware of a video server. The method comprises the following steps: after the input multi-channel video data is received, the input video data format is set, and the video re-sampling is performed; and then the video mixing is performed to the multi-channel video data, the mixed data is output by positioning, and a multi-channel video pre-monitoring window picture is formed by configuring the position of a pre-monitoring picture. The invention is suitable for (but not confined to) simultaneously monitoring the video data of all the channels under the multi-channel video data acquisition mode of the video server, the hardware self-adapting function of video pre-monitoring as well as the video mixing function of the multi-channel data is realized by the method, the display can be performed through various template forms, and the invention can be used for various devices such as analog television walls, material browsers, and the like by adjusting the data source or the video arrangement method.

A digital video recorder (DVR) system with an integrated DVD recording device accepts TV input streams in a multitude of forms. Analog TV streams are converted to an MPEG formatted stream for internal transfer and manipulation, while pre-formatted MPEG streams are extracted from the digital TV signal and presented in a similar format. Indexes within the MPEG stream are determined and saved at predefined intervals and are stored on a hard disk along with the MPEG program material and used to create navigation packets when writing to a DVD inserted in an integrated DVD player/recorder. When a program is requested for display from the hard disk or the integrated DVD player/recorder, the program material are extracted from the appropriate source and reassembled into an MPEG stream which is sent to a decoder. The decoder converts the MPEG stream into TV output signals and delivers the TV output signals to a TV monitor. User control commands are accepted which affect the flow of the MPEG stream allowing the user to view stored programs with special functions: reverse, fast forward, play, pause, index, fast/slow reverse play, and fast/slow play. The user can select program material stored on the hard disk to be written to a DVD and can also select program material stored on a DVD to be transferred to the hard disk.

A cable signal distribution system to allow the distribution of a digital cable signal in a building using the existing cable network in the building. The cable signal distribution system is a low cost system coupled with simple functionality. The cable signal distribution system splits the initial cable signal frequency range into two separate bands, a low band for operating cable television system-related equipment, and a higher frequency band used to create a Home Band Network of cable frequencies within the cable signal frequency range. The Home Band Network is used to transmit the channel tuned by the CATV digital set top box to existing analog Televisions in the building.

An analog TV broadcast receiver connected to a multi-directional antenna has a receiving direction counter for a channel which is set at an initial receiving direction to measure intensity of a TV broadcast signal in the initial receiving direction, when a channel registration in the TV broadcast receiver starts. The measured intensity, if higher than a threshold, is registered in a channel map. The receiving direction counter is sequentially incremented to measure the intensities in all receiving directions. All the measured intensities higher than the threshold are registered in the channel map as best receiving directions. A user can delete one or more of the registered best receiving directions by viewing images on a screen of the TV receiver that are given by the registered best receiving directions. It can solve a problem that a receiving direction which a user considers to give an undesired image remains registered.

A broadband multi-frequency-block Extended Digital Audio Broadcasting X-DAB) transmission method for the interference-free transmission of value-added services at a high data rate to mobile receivers within an analog television channel. At least two simultaneously-broadcast adjacent X-DAB frequency blocks in a single-frequency network are provided. A digital input data stream is multiplexed onto the frequency blocks, with the input data steam being source-coded according to the service content of the input data stream. The input data stream is separated into a plurality of individual dens streams, with the individual data steams each having a respective quality of service importance and being distributed according to the respective quality of service importance among the at least two frequency blocks. The method offers a high degree of flexibility with regard to error protection profiles and thus data rates, and permits the implementation of non-constant-ratio error protection profiles, as well as hierarchical transmission.

The present invention discloses a network real-time video collecting device based on FPGA chip and DSP chip development. The device of the invention comprises a video collecting module, a video signal processing module, a network control module, a handshake control module of press button switch and network protocol and an upper machine terminal alternation module. The device realizes the high-speed real-time collection and network transmission to analog video signal/analog television signal or high resolution computer signal. Based on the network handshake protocol between the upper machine and video collecting device which are developed independently on the video collection hardware platform, the specific data in the negotiation package can be flexibly set for controlling the working state of collecting device and realizing the network intelligent control of a plurality of video collecting devices. The device is composed of small-capability FPGA chip and intermediate-performance DSP chip, and can be widely used for the fields of enterprise/family guarding system, real-time video monitoring of operating interface of computer device, visual auxiliary drive of intelligent vehicle, etc.

A modem system may include modems that have multiple upstream transmitters for transmitting signals upstream in a communication network. In some embodiments herein, one or more of those upstream transmitters may be retasked to transmit downstream signals for reception at devices within a modem's premises. The downstream signal may be modulated differently from its original modulation as received by the modem, and may be modulated in a manner that can be received by legacy components on the premises, such as analog televisions.

TeleWeb services are currently being developed, in which HTML-encoded images are transmitted in the vertical blanking interval of a conventional analog television signal. For special applications, such as subtitling and targeted advertising, the relevant TeleWeb images must be displayed substantially in synchronism with given video frames of the television signal. This is achieved by transmitting the encoded images in advance and provide them with a time stamp (33) which specifies the display time in terms of a reference clock. The reference clock is preferably derived from the teletext clock time (31,32). A possible display time stamp format is hh:mm:ss'ff, where ff specifies a frame within a second. At the receiver end, the teletext clock is interpolated to reconstruct the reference clock, and the subtitles are buffered until the display time stamp matches the actual clock time.

A TV broadcasting reception apparatus 100 has a following function: when the same program is being broadcasted at the same time between digital TV broadcasting and analog TV broadcasting, even if the user selects reception of the analog TV broadcasting, the same program in the digital TV broadcasting is found out and the analog TV broadcasting is preferentially and automatically switched to the digital TV broadcasting. Further, the TV broadcasting reception apparatus 100 has a following function: when the same program is being broadcasted at the same time between digital TV broadcasting and analog TV broadcasting, in case that during receiving the digital TV broadcasting, the reception state of its digital TV broadcasting worsens so that the digital TV broadcasting cannot be received, the program in the digital TV broadcasting is preferentially and automatically switched to the same program in the analog TV broadcasting that has been previously searched.

A sync signal generating apparatus and method for video signal processor are disclosed comprising an image processor processing either an input digital television video signal or an input analog television video signal to display one of the signals; a display unit displaying an output signal of the image processor; a frame rate detector detecting a frame of the digital video signal and generating a frame rate signal; a display mode detector detecting whether an image to be currently displayed is a digital television image or an analog television image and generating a display mode signal; a clock generator generating a clock signal according to the display mode signal and the format signal to the image processor; a sync signal compensation unit generating a sync compensation signal based upon the display mode signal, the clock signal, and a vsync signal of the analog television video signal; and a sync signal generator resetting and compensating a sync signal based upon the sync compensation signal and the clock signal and sending the compensated sync signal to the image processor.