126 results about "Teletext" patented technology

The present invention relates to a device for acquiring electronic program guide (EPG) data from a plurality of different EPG sources (120), and combining the acquired data to a single EPG (10). At regular intervals, EPG data is acquired from different sources (120), which may include the Internet (122), digital programming broadcasters, and teletext service providers (126). Equivalent program listings (40) within the acquired EPG data are identified, and the best information is selected from the equivalent program listings (40) to be included in the combined EPG (10). The present invention is able to identify equivalent program listings (40), even if the program titles are written in different languages or when the scheduled broadcast times differ to some extent. The resulting EPG (10) is more reliable and contains more information than any of the EPGs (10) associated with the original sources (120).

A decoding system comprises a software-oriented implementation of the decoding process for extracting binary teletext and closed caption data from a signal. The decoder system according to one embodiment includes a processing unit which implements both a closed caption module and a teletext module. The decoder system calls the closed caption module to detect a clock synchronization signal associated with closed caption data. Upon finding the clock synchronization signal, the closed caption module synchronizes to the signal, identifies a framing code, and extracts the closed caption data. Similarly, the decoder system may call the teletext module for the teletext lines, which also synchronizes using a teletext clock synchronization signal. When the clock synchronization signal is detected, the teletext module interpolates the incoming data to reconstruct the data signal. The data signal is then processed to normalize the amplitude and reduce the "ghost" effects of signal echoes prior to the slicing of the data signal. The data is also suitably subjected to Hamming code error detection to ensure the accuracy of the data.

A method for managing the detection of advertising sequences in a stream of information stored on a mass memory module of an electronic apparatus, the information stream corresponding to an extract of a television program, the information stream including a first set of information corresponding to a content to be rendered and a second set of information, corresponding to the advertising sequences, the information stream including at least one set of video information, and teletext type data, and subtitle data associated with the stream, the method including analyzing the video information for detecting a format transition in the images associated with the video information; optionally storing a first address information corresponding to the detected transition, and validating a first detection condition; analyzing the teletext type data for detecting an absence, and then a presence, of teletext subtitles associated with the video information, optionally storing a second address information corresponding to the detected, transition, and validating a second detection condition; analyzing the subtitle data associated with the stream for detecting an absence, then a presence of the subtitle data associated with the stream; optionally storing third address information corresponding to the detected transition, and validating a third detection condition; if the three detection conditions are validated, identifying the stored address information as transition sequences between the second set of information and the first set of information.

Recovering data (e.g., closed captioning data, teletext data) encoded in television signals. A line encoding the data is over-sampled. The resulting samples are examined to determine the average number of samples spanning the low and high values in a run-in period. The average numbers are used to determine the sampling clock and the samples which represent the encoded data. By using the two average numbers, any errors which may be otherwise encountered due to factors such as ghosting may be eliminated or avoided.

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 television receiver for receiving data signals, particularly teletext, associated with a television signal, has a page memory (13) for storing a plurality of pages for display on a display screen. In order to use the memory with maximum effectiveness, a queue is formed in order of priority of requests for allocation of memory locations for storing pages. Various features, such as FASTEXT, TOP, EPG, WST level 2.5, each require a certain minimum number of pages to allow the feature to be achieved. Each feature has a dedicated page request generator (PG-1 to PG-n) which each provide an ordered list of page requests. These page requests are fed to priority setter (P) which allocates for each of the page request generators, a given priority based on a priority scheme (PS) and a list of connected page request generators (PGL). The page request generators (PG-1 to PG-n) react to system events source (S1), broadcast event sources (S2), and/or user event sources (S3). This enables the easy addition or deletion of features.

The invention provides a method for calculating the code phase pseudorange between a locating terminal and a satellite in an A-GPS. An A-GPS locating terminal captures the distance measuring signals of satellite and gets the measuring information according to the assistant information received from the network rapidly; an A-GPS algoritic module makes use of the initial position provided by the A-GPS locating terminal and the satellite navigation teletext information provided by the other locating devices to work out the pseudorange from the initial position to the satellite; then the A-GPS algoritic module makes use of the measuring information of terminal to work out the corrected range between the initial position and the actual terminal position; and then the actual pseudorange between the A-GPS locating terminal and the satellite is further worked out. The method inherits the method that the traditional GPS locating system conducts the location through code phase pseudorange; the locating process that the A-GPS locating terminal does not need to download directly, the satellite navigation teletext is obtained indirectly through a network, and the A-GPS locating terminal completes the fast capture of the satellite signals and calculation of the pseudorange information is realized.

A frame synchronization method of a GPS receiver comprises the following steps: (1) after the GPS receiver is turned on and is fixed firstly, the local clock is adjusted periodically to ensure that the times and variation periods of the local clock and the GPS clock are consistent, the current position of the GPS receiver is recorded; (2) after the channel of the GPS receiver is unlocked and recaptured, the local time and ephemeris are read, the preliminary position of the satellite is calculated according to the ephemeris and the approximate launch time of satellite signals; (3) the uncorrected approximate distance of the GPS receiver and the satellite is calculated according to the recorded initial position of the GPS receiver and the preliminary position of the satellite so as to obtain pseudorange; (4) the local time is corrected according to the time used for executing the step (2) and the step (3) to obtain the satellite launch time of the current teletext; and (5) the frame count, bit count and millisecond count of the current teletext are calculated according to the result of the step (4), and frame synchronization is performed to extract the teletext.

Teletext for video telephony between subscribers conferencing over a telecommunications network is provided. A Gatekeeper controls communications of the telecommunications network. A video encoder/decoder encodes and decodes audio/video signals to provide video telephony to at least one subscriber. A video text server provides teletext signals representing teletext to be established in the video telephony conference. The video encoder/decoder originates a SETUP message to the Gatekeeper. The Gatekeeper includes address translation rule that causes the Gatekeeper to redirect the SETUP message to the video text server. The videotext server sends a Release Complete message to the Gatekeeper. The teletext signals representing the teletext are rerouted from the video text server to the Gatekeeper.

The invention discloses an intelligent power distribution safety control system, which can give an early warning to inform a switch where a hidden danger of overheating occurs, and completely eliminate fire accidents caused by human negligence, untimely inspection and the like. The system consists of temperature sensor, temperature acquisition unit, input memory, data processor, central processing unit, graphic display processing, touch screen, communication processor, Ethernet, SMS unit, control output unit, tripping controller and air breaker The signal output by the temperature sensor installed at each metal contact of the air circuit breaker in the power distribution cabinet is collected by the temperature acquisition unit and input to the storage, data processor and comparator. The display processing, touch screen, and communication processor are used to display and control various parameters, and send over-temperature alarm information through the Ethernet and SMS unit, and trip and power off the air circuit breaker with over-temperature contacts through the control output unit .

A method (40, 50) and apparatus (30) for processing a video signal inserts a unique digital signature into the video signal. Thus, rampant duplication or distribution can be traced back to a particular set-top box or receiver. According to one aspect of the present invention, the unique digital signal is inserted into the vertical blanking interval. An apparatus (30) for processing a video signal includes a processor (31) receiving the video signal and outputting a modified video signal having a vertical blanking interval, which includes a digital signature uniquely identifying the processor (31). A memory (33) stores the digital signature and a teletext generator (32) coupled to the memory (33) and the processor (31) and generates a teletext signal that includes the digital signature for insertion into the vertical blanking interval by the processor (31) prior to the processor (31) outputting the video signal.

A technique to provide a cost effective solution to detect teletext data that can reduce detected error in teletext when the transmission data rate is known. In one example embodiment, this is accomplished by detecting data bits in an unsynchronized digital data stream by finding start of each data bit based on an estimated data bit width and transitions in the unsynchronized digital data stream.

The invention provides an anti-interference A/D chip for Compass satellite navigation, which is integrated with a signal channel A and a signal channel B at the same time to receive two channels of medium-frequency analog signals and respectively output 4-bit digital signals. The channel A is designed as a second-generation Compass B3 frequency point signal receiving channel, and receives 46.52MHz of medium-frequency analog signals; the channel B is designed as a first-generation Compass S frequency point signal receiving channel, and receives 12.24MHz of medium-frequency analog signals; the channel A and the channel B can carry out anti-interference or straight-through processing on input signals according to interference types and pin configuration, and after the amplitudes of the processed signals are regulated by digital AGCs (automatic gain controller), 4-bit digital signals are outputted by each channel. The anti-interference A/D chip for Compass satellite navigation can simultaneously receive and process the medium-frequency satellite navigation signals of the second-generation Compass B3 frequency point and the first-generation Compass S frequency point in the Compass satellite system, and can meet the requirement of hand-held receivers on the teletext reception and integrated positioning of the Compass satellite system.

A similar change information takeout apparatus is intended to take out automatically unit containing similar change information when character row data divided in certain units are given in a multiplicity, and comprises an input unit in which character row data are entered sequentially in time series, a former data memory unit for storing character row data, a start/stop input unit for accepting an input for designating start or stop of output of similar change information from the user, a new data unit takeout process for taking out sequentially the units contained in new data, a unit comparison process for comparing the units taken out in the new data unit takeout process and the units contained in former data to see if different or same character by character contained in the units sequentially, a different character and type counting process for calculating the variety and number of different or same characters as a result of comparison in the unit comparison process, and a similarity judging process for judging similarity between units in certain condition on the basis of the result of calculation of the different character and type counting process.

The embodiment of the invention relates to the technical field of a STB (Set Top Box), discloses a method and equipment for upgrading the STB and is used for carrying out automatic upgrading when a user does not use the STB. The method comprises the following steps: the STB detects standby information triggered by the user, wherein the standby information is used for triggering the STB to start a standby mode; the STB acquires any one piece of fixed frequency point information in system parameters; the STB receives transmission streaming data of a page identifier of any one teletext packet identifier of the frequency point information; the transmission streaming data of the page identifier of any one teletext packet identifier of the frequency point information is analyzed into data of a STB database; the data of the STB database, which is obtained after analysis, is written into a flash memory of the STB; and the STB is transferred to enter a standby state. According to the embodiment of the invention, the automatic upgrading can be carried out when the STB is idle, so that the user is avoided being influenced to view programs and the troubles brought to the user are reduced.

A data transmitting/receiving apparatus and method in which color gamut information is added to a teletext signal in a blanking interval so that a display device can recognize whether a color gamut has been extended, are provided. The apparatus includes a control unit which determines whether an image signal is a wide color gamut signal. A signal processing unit encodes color gamut information of the wide color gamut signal and allocates the color gamut information to a data region of a teletext interval if it is determined that the image signal is the wide color gamut signal. The signal processing unit transmits an image signal including a teletext packet in which the color gamut information is recorded.

In a method for the display of teletext headers on a television receiver screen during a search for a teletext page, the teletext service uses a first group of characters comprising fixed characters and locations to receive variable characters and a second group of sets of characters, each set of characters being proper to a language and being designed to be introduced selectively at the locations of variable characters of said first group. The set of characters to be introduced into the first set is selected as soon as the first data packet enabling it to be identified is received by the TV receiver in such a way that the headers are displayed properly.

A data decoder decoding an input signal, comprising a comparator, a converter, and a data check module. The comparator compares the input signal with a threshold level to generate first data, such that each bit of the first data is one of two possible states, and identifies an ambiguous bit of the first data in an ambiguous range. The converter coupled to the comparator converts the first data to parallel. The data check module coupled to the converter evaluates whether the first data is inaccurate according to an error checking code thereof, and changes the ambiguous bit to the other possible state, if the first data is inaccurate. The ambiguous range includes the threshold level.

A system and method for efficiently detecting and decoding valid teletext message sequences is provided. A system is provided that includes a correlator, a sine wave generator, two time window generators, a phase detector, a framing code search engine, and a match filter. The method includes determining the phase of the run-in burst of a teletext message sequence, identifying the framing code location, deciding whether the teletext sequence is valid, and decoding the teletext data for display.

The invention discloses a community medical service system based on a digital household intelligent terminal, which comprises the digital household intelligent terminal and a digital television display terminal, wherein the digital household intelligent terminal comprises an Internet access module used for establishing network connection, an intelligent terminal underlying hardware module used for providing an interface resource, a loading program and Linux operating system support, a community medical module used for receiving medical information through the Internet and achieving registration and appointment services, and a background service module used for storing the information and providing the medical information for the community medical module; the community medical module submits appointment information of a user to the background service module; and the digital television display terminal is used for conducting information exchange with the digital household intelligent terminal, receiving teletext information sent by the digital household intelligent terminal, and displaying the teletext information on a screen. The system achieves appointment registration through a digital television, issues the latest medical information, is better accepted by the aged compared with computer operation, and brings convenient digital household life experience.

A tele-text receiving apparatus (100) and a display method thereof. The tele-text receiving apparatus comprises an input unit (110) having a picture/text display mode key and a channel change mode key, and a control unit (200) for dividing a screen of the display unit (170) and respectively displaying information corresponding to channels tuned by the main-tuner (122) and the sub-tuner (124) on the divided screens when a picture/text display mode key signal is received through the input unit (110), the control unit (200) for controlling a selected screen of the divided screens according to a signal input through the input unit (110) when a channel change mode key signal for controlling any one screen of the divided screens is received through the input unit (110) during the picture/text display mode operation. Accordingly, it is possible to display the television programme picture of one television channel next to the teletext of another television channel concurrently.

The embodiment of the invention provides a subtitle display method and device. The method and the device are used for shortening the time consumed in the teletext subtitle display and improving the teletext subtitle displaying efficiency. The method includes the steps of obtaining a teletext subtitle instruction, determining the page number which the teletext subtitle in the current channel belongs to, outputting the page number which the teletext subtitle belongs to, receiving a page number selection instruction, and outputting the teletext subtitle in the page which the selected page number belongs to. Thus, by automatically searching for the page where the teletext subtitle is located, a user can output the subtitle which need to be displayed only by sending the teletext subtitle research instruction and selecting the page number of the page where the found subtitle is located, the operation step for searching for the teletext subtitle is simplified, the time consumed in the teletext subtitle display is finally shortened, and the teletext subtitle display efficiency is improved.