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38 results about "Digital television transition" patented technology

The digital television transition, also called the digital switchover (DSO), the analog switch-off (ASO), the digital migration, or the analog shutdown, is the process in which older analog television broadcasting technology is converted to and replaced by digital television. Conducted by individual nations on different schedules, this primarily involves the conversion of analog terrestrial television broadcasting infrastructure to digital terrestrial (DTT), a major benefit being extra frequencies on the radio spectrum and lower broadcasting costs, as well as improved viewing qualities for consumers.

Digital television transmitter and receiver for transmitting and receiving dual stream using 4 level vestigial side band robust data

The present invention relates to a Vestigial Side Band (VSB) Digital Television (DTV) in agreement with the DTV standards (A / 53) of the Advanced Television System Committee (ATSC), and to a method thereof. More particularly, it provides 4-VSB DTV transceiver that improves reception performance of a receiver by transmitting and receiving dual streams formed of normal data and robust data without increasing average power, regardless of a mixing rate of the normal and robust data. The 4-VSB DTV transceiver of the present research includes an encoding unit for encoding the robust data to be mapped to one of two groups having 4 levels {−5, −3, 1, 7} and {−7, −1, 3, 5}.
Owner:ELECTRONICS & TELECOMM RES INST

Digital television transmitter and receiver for transmitting and receiving dual stream using 4 level vestigial side band robust data

The present invention relates to a Vestigial Side Band (VSB) Digital Television (DTV) in agreement with the DTV standards (A / 53) of the Advanced Television System Committee (ATSC), and to a method thereof. More particularly, it provides 4-VSB DTV transceiver that improves reception performance of a receiver by transmitting and receiving dual streams formed of normal data and robust data without increasing average power, regardless of a mixing ratio of the normal and robust data. The 4-VSB DTV transceiver of the present research includes an encoding unit for encoding the robust data to be mapped to one of two groups having 4 levels {−5, −3, 1, 7} and {−7, −1, 3, 5}.
Owner:ELECTRONICS & TELECOMM RES INST

Digital television program searching method, and digital television receiving terminal and transmission system

The embodiment of the invention discloses a digital television program searching method, a digital television receiving terminal and a digital television transmission system. The method comprises the following steps of: locking a dominant frequency point in a digital television network and demodulating to obtain a base band transmission stream so as to acquire a network information table (NIT) and a service description table (SDT) in the base band transmission stream; analyzing the NIT to acquire relative description information of programs contained in a second cyclic transmission stream; analyzing the SDT to acquire program names of all programs in the digital television network; and storing the program names and program description information correspondingly to provide selective playing for users. By the digital television program searching method, the digital television receiving terminal and the digital television transmission system which are provided by the embodiment of the invention, the problems that program search speed is low and user experience is influenced because all program information in the network can be acquired only when all frequency points described in the NIT are required to be locked in the conventional automatic search mode are solved.
Owner:SHENZHEN SKYWORTH DIGITAL TECH CO LTD

Navigation services based on position location using broadcast digital television signals

A service depends on the location of a device. The device location is determined using DTV signals. More specifically, the device location is determined based on pseudo-ranges between the device and a plurality of digital television (DTV) transmitters and the pseudo-ranges are determined based on broadcast DTV signals received by the device from the DTV transmitters. Examples of DTV signals include the American Television Standards Committee (ATSC) signals, the European Telecommunications Standards Institute Digital Video Broadcasting-Terrestrial (DVB-T) signals and the Japanese Integrated Service Digital Broadcasting-Terrestrial (ISDB-T) signals.
Owner:TRUE POSITION INC

Combined digital set top boxes based on software radio

Disclosed is a composite set-top box based on software defined radio in the digital television field. A function unit comprises a satellite television signal turner, a cable television signal turner, a ground radiated television signal turner, an A / D transformer, a digital down converter, a software defined radio platform, a MPED-2 main chip system, an analog audio-video processing unit, an embedded control circuit, operating keys and a display panel; wherein the software defined radio system composed of a high-performance DSP completes the demodulation of QAM, QPSK and COFDM three modulation signals; an embedded control circuit is used as the main control unit of the whole television; connects and controls the satellite television signal turner, the cable television signal turner and the ground radiated digital television signal turner, the MPEG-2 main chip system and the software defined radio platform through an I<2>C bus and HPI host interfaces; and connects with the operating keys and the display panel through a GPIO interface. The invention achieves the function that the single set-top box simultaneously receives the satellite signals, the cable television signals and the ground radiated digital television signals.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD

Real-time signal strength measurement and display of digital television signals

An HDTV receiver coupled to a terrestrial antenna displays real-time signal strength of terrestrial digital television signals. A graphical user interface preferably displays various data relating to all terrestrial television signals in a scrollable grid format. The grid is displayed within an active video display of a selected television signal from the grid. Audio for the selected channel is also active. A list of all channels tuned or selected is maintained to aid in searching. Channel lists are updated during certain channel searches.
Owner:INTERDIGITAL CE PATENT HLDG

Method for updating channel information of digital television set and digital television set thereof

The present invention is suitable for a television set, and provides a method for updating channel information of a digital television set and the digital television set, wherein the method comprises the following steps of: a, analyzing a version number of a NIT (Network Information Table) or a SDT (Service Description Table) from a transport stream, then comparing the analyzed NIT or SDT version number with the stored NIT or SDT version number used by the digital television set at present, if the two version numbers are not consistent, continuing to perform the step b; and b, controlling the digital television set to perform channel searching flow, so as to update the channel information. The technical scheme provided in the present invention allows users to understand the updated contents of the channel information in advance and determine whether to update the channel information of the digital television set as required, thereby avoiding the deficiency that the current users passively update the channel information of the digital television set, improving intelligence and humanization degree of products, and satisfying user requirements.
Owner:SHENZHEN TCL NEW-TECH CO LTD

Realization method for cable interactive television cross-domain video service connection system

The invention relates to a realization method for a cable interactive television cross-domain video service connection system. The method comprises the following steps: defining video-on-demand request data in an XMPP (Extensible Messaging and Presence Protocol) message format by a digital television set-top box; when an interactive television cross-domain video service is used by a user, bearing a video-on-demand request and a supportable media format through an XMPP message, sending out a service connection request, automatically forming a friend relationship in an XMPP message channel together with a video service system connected with an operator domain, and after the video service system connected with the operator domain receives the XMPP message of the user video-on-demand request, analyzing and processing the XMPP message, distributing video service resources for the digital television set-top box and pushing video programs to the digital television set-top box initiating the request in a media format compatible in the request. Therefore, the problem of video-on-demand protocol compatibility between different digital television set-top boxes and different video service systems connected with operator domains is solved, and the trouble that the set-top box needs to be updated once when being connected with a new operator domain is avoided.
Owner:ORIENTAL CABLE NETWORK +1

Method for the transmission and distribution of digital television signals

A system for the end-to-end delivery of digital television signals. In a preferred embodiment a digital television signal is: received from production equipment, typically in HD format at approximately 1.4 gigabits per second (Gbps); the received signal is transmitted to a venue point-of-presence; converted for transmission via a 270 Mbps local loop; transmitted to a fiber network point of presence / video service edge; packetized into TCP / IP packets in a video gateway; and routed to one or more destination addresses via the fiber network; received at one or more video service edge destinations; converted to a digital television format, typically SDI; and either transmitted via a second 270 Mbps local loop for delivery to a customer site and subsequent conversion to a 1.4 Gbps HD signal, or converted directly to a 1.4 Gbs HD signal at the receiving video service edge.
Owner:LEVEL 3 COMM LLC +1

Integrated multi-picture digital video monitoring method and system

The invention provides an integrated multi-picture digital video monitoring method and system. The method comprises the following steps of: firstly, receiving one or more digital television signals with the same or different forms; decoding video and audio programs in a plurality of the digital television signals; carrying out comprehensive transmission flow analysis on the digital television signals and verifying whether a transmission flow accords with a suitable standard or not; then, displaying the content of a plurality of decoded videos, and an electric level and an audio volume of an audio sound track corresponding to each video on one or more computer displays or televisions; and displaying analyzed and verified results to a user through operating application programs on the same monitoring system or on different computers connected with the monitoring system through an IP(Internet Protocol) network. The integrated multi-picture digital video monitoring method and system disclosed by the invention have the advantages that only one system needs to be purchased, and multi-picture display, audio volume monitoring and transmission flow analysis functions can be finished; and a great amount of investment capital and a rack space can be saved.
Owner:HEFEI PNEGXIANG SOFTWARE TECH

Methods and apparatus for removing NTSC signals from a digital television signal

A method and apparatus for removing national television system committee (NTSC) signals from a broadcasted datastream including advanced television system committee (ATSC) signals are provided. The apparatus includes an NTSC signal removing unit for removing the NTSC signal from an input signal with one or a plurality of NTSC filtering units; a vestigial sideband (VSB) core unit for generating an error generating signal if the NTSC signal is not removed by the NTSC signal removing unit for a continuous time period of at least a predefined length; and an NTSC filtering selection unit for applying a control signal to select a different one of the NTSC filtering units in response to the continuous error signal output by the VSB core unit.
Owner:INTELLECTUAL VENTURES II

Often-watch television channel selection method based on digital television

The invention relates to the field of digital televisions, and provides an often-watch television channel selection method based on a digital television so that existing problems of long time consumption and energy consumption when a user searches television channels often watched by the user can be solved. The method comprises the steps that channel information of a current television channel is detected; the channel information is extracted from a channel watching record; an often-watch channel list is inquired; whether the often-watch channel list includes the current television channel is conditionally judged; whether watching time is greater than saved playing time is judged at intervals; the channel information of the television channels having the same channel name of the current television channel saved in the often-watch channel list is deleted; and the channel information of the current television channel is added to the often-watch channel list. Rapid selection of the digital television channels can be realized by the technical scheme so that user experience is enhanced.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD

Multisystem digital television signal front end processing device and digital television broadcasting system

The invention discloses a multisystem digital television signal front end processing device and a full-digitalization digital television broadcasting system, which solve the problem that the updated television cannot be compatible with the prior satellite television system. The technical scheme comprises that: the device comprises a plurality of different systems of front end decryption modules and a plurality of QAM modulators, wherein the front end decryption modules demodulate and descramble the received different systems of digital signals, and output the descrambled TS stream; and the QAM modulators demodulate the input TS stream according to a QAM mode and output RF signals after each QAM modulator is connected with the front end decryption modules. The device and the system are applied in the field of digital televisions.
Owner:SHANGHAI XINGYUE INFORMATION TECH

Method for avoiding switch-over delays when changing channels in digital television transmission systems

A method for avoiding switch-over delays when changing channels in digital television transmission systems is based on a television transmission system in which a plurality of channels (K1, . . . , Kn) are transmitted in time-division-multiplexed fashion in a data stream (5). An overview channel comprising television picture information items from a plurality of the transmitted channels is provided at the transmitting end. The overview channel is decoded in the television receiver, and the picture information items of the selected channel that are provided in the overview channel are represented while changing channels.
Owner:INTEL CORP

Full-mode set-top box

The invention provides a syntype set-top box that integrates multiple mainstream CA and multiple mainstream data broadcast, supports multiple format upgrading on-line and multiple program ordering, and supports EPG NVOD and mosaic or the like. The set-top box can satisfy all broadcasting and TV inviting and model machine requirement basically, let client and broadcasting and TV operator learn existing domestically set-top box industry state rapidly. The invention also can help client and broadcasting and TV operator processing analysis and suggestion according with practical situation, customize set-top box rapidly and accelerate conversion course of integrated digital TV.
Owner:SICHUAN JINWANGTONG ELECTRONICS SCI & TECH

System for simultaneous delivery of digital television and interactive broadband service

A method and apparatus is provided for the delivery of digital television and interactive broadband service in a manner that maximizes the useage of the digital broadcast spectrum. A digital television signal is transmitted to a given broadcast area in a relatively small part (for example, a 1 MHz band) of one or more licensed portions of the digital broadcast spectrum. Interactive broadband service is delivered within at least a portion of the same broadcast area covered by the broadcast digital television signal, in the remainder (for example, a 5 MHz band) of an unused part of the same licensed portion of the digital broadcast spectrum as is occupied by the digital television signal, or within an unlicensed (unused) portion of the digital broadcast spectrum. The broadcasting of the digital television and delivery the interactive broadband service occur simultaneously. In one embodiment, digital television and broadband service are delivered by the same equipment within the same bandwidth.
Owner:RTEM INNOVATIONS CORP

Method for indicating digital television signal and digital television using same

The invention discloses a method for indicating a digital television signal and a digital television using the same. The indicating method comprises the following steps of: acquiring an intensity level L of the digital television signal; acquiring a quality index C of the digital television signal; giving a comprehensive quality level Q according to the intensity level L and the quality index C of the digital television signal; and displaying the comprehensive quality level Q of the digital television signal. The digital television is characterized by adopting the signal indicating method. The method for indicating the digital television signal gives the comprehensive quality level, and is simple and easy to identify according to the signal intensity and quality of the digital television signal.
Owner:KONKA GROUP

Digital video encoder function testing method

The invention provides a digital video encoder function testing method. A digital video encoder is respectively connected with a decoder and a central processing unit (CPU), wherein, the decoder is connected with the CPU; the decoder comprises a high-speed analog-to-digital (AD) converter (1); and the CPU comprises a liquid crystal display (LCD) controller and a high-speed AD converter (2). The method comprises the following steps: 10. a video signal is transmitted to a television signal encoder by the CPU through the LCD controller, and the video signal is encoded into a digital television signal; 20. the television signal is converted into an analog video signal through a video analog-to-digital converter, and is processed through a filter; 30. the signal processed by the filter is transmitted to the high-speed AD converter (1) through a multi-path switch, and is converted into a digital signal; and 40. the digital signal is received by the CPU through the high-speed AD converter (2), and analysis processing is carried out to obtain the testing result. The method of the invention has simple operation process, can reduce the cost, can improve the efficiency, and has wide use range.
Owner:FUZHOU ROCKCHIP SEMICON

Digital television translator with PSIP update

A digital television translator includes a digital television receiver for receiving a first digital television signal at a first frequency and generating a digital transport stream from the first digital television signal. The digital transport stream can include original Program and System Information (PSIP) data having RX channel data that is indicative of the first frequency, the first major channel number, and / or the first minor channel number. The digital television translator also includes a PSIP update module for updating the original PSIP data in the digital transport stream by replacing the RX channel data with TX channel data. The TX data is indicative of a second frequency, a second major channel number, and / or a second minor channel number. The digital television translator further includes a digital television modulator for converting the digital transport stream having the updated PSIP data into a second digital television signal at the second frequency, where the second frequency can be the same or different from the first frequency.
Owner:K TECH TELECOMM

Power line-based digital television signal accessing method and digital television

The embodiment of the invention discloses power line-based digital television signal accessing method. The method comprises the following steps of: receiving a power supply signal and a digital television signal by a power supply module in a digital television; separating the digital television signal; and sending the separated digital television signal to a central processing unit in the digital television for processing. The embodiment of the invention also discloses the digital television. The digital television comprises the power supply module and the central processing unit, wherein the power supply module is used for receiving the power supply signal and the digital television signal, and separating and sending the digital television signal to a modulation / demodulation module; and the central processing unit is used for processing the digital television signal separated by the power supply module. By using the method and the digital television, a user can watch related program contents of the digital television through a power line.
Owner:GUANGDONG GUANGLIAN ELECTRONICS TECH +1

Method for rapidly changing channels of digital television

The invention discloses a method for rapidly changing channels of a digital television. The method comprises the following steps that: (1) an electronic program menu interface is entered, and a cursor appears on the electronic program menu interface, wherein the position of the cursor is an initial position; (2) if the digital television detects that the cursor leaves the initial position, the digital television detects a current position of the cursor, and transmits channel information of an electronic program represented by the current position to a DVB (Digital Video Broadcasting) management module; (3) the DVB management module retrieves frequency point information corresponding to the electronic program according to a received channel signal of the electronic program, and transmits the frequency point information to a tuner; (4) the tuner performs frequency locking according to the frequency point information, and returns a frequency locking result to the digital television; and (5) if a user determines to play the electronic program represented by the current position of the cursor, the digital television switches to a channel of the electronic program, and otherwise returning to the step (2) is performed. Through adoption of the method, a frequency point on which the electronic program is to be played is pre-locked. Thus, when the user really executes a channel changing action, the frequency locking time is shortened; the channel changing speed is increased; and the user experience is enhanced.
Owner:SHENZHEN IPANEL TECH LTD

Audio and video transmission method and digital television terminal

The embodiment of the invention discloses an audio and video transmission method and a digital television terminal. The method comprises the following steps that a converted YPRBP signal in a to-be-transmitted audio and video signal is converted into an RGB (Red, Green and Blue) signal; the RGB signal and an I2S (Inter-IC Sound) signal in the audio and video signal are encoded; and a TS (Transport Stream) signal is generated, decoded, compressed and then transmitted to wireless equipment. Multi-terminal audio and video output can be achieved without buying an additional digital television terminal or performing wiring decoration.
Owner:SHENZHEN COSHIP ELECTRONICS CO LTD

Device for converting the digital TV signals into the analog TV signals

This invention provides one device to convert digital television signal to analogue television signals, which processes the received digital television channel signals through satellite antenna or wire television transmission circuit or earth broadcast wireless digital television channel signals into analogue television signals, wherein, it then re-aligns the signal channel to modulate and convert analogue signals into original cable television system sent high frequency analogue television channel signals.
Owner:李博航

Digital television timing charging and copyright protecting method based on watermarks

The invention discloses a digital television timing charging and copyright protecting method based on watermarks. The digital television timing charging and copyright protecting method comprises the following steps: 1) recording the starting time that a user watches a digital television and the program information; 2) reading a PDK (PERL Development Kit) in a smart card by virtue of a bidirectional set top box, enabling the PDK to generate watermark signals, and carrying out the error correction of coding on the watermark signals; 3) enabling the watermark signals processed by the error correction of coding through a decoder at the time of decoding into the middle-low frequency DCT coefficients of an I frame luminance component after the I frame is researched, and then outputting and playing the middle-low frequency DCT coefficients; 4) billing the digital television by hours through a user management system; 5) extracting watermarks of suspended illegal videos when the suspended illegal videos are played in the program of the digital television, and determining the copyright by utilizing the extracted watermark signals, and further judging the user illegally spreading programs of the digital television. The digital television timing charging and copyright protecting method disclosed by the invention has the advantages of novel and reasonable design, simplicity in operation, low cost, high accuracy in timing charging, and high popularization and application value, and also has the advantage that the source of the copyright infringement can be tracked. The digital television timing charging and copyright protecting method is suitable for the popularization and development of the digital television.
Owner:XIAN UNIV OF SCI & TECH

Frequency agility system for co-frequency forwarding of digital television

The invention relates to a frequency agile system for co-frequency forwarding of a digital television, which mainly comprises a donor antenna, a frequency agile host machine, a digital television power amplifier and a retransmitting antenna, wherein the donor antenna for receiving a digital television signal derived from a main transmitting station is connected with the input end of the frequencyagile host machine by a coaxial cable; the digital television power amplifier for power amplification is connected with the output end of the frequency agile host machine by a coaxial cable; and the retransmitting antenna for transmitting a digital television signal is connected with the output end of the digital television power amplifier by a coaxial cable. The invention has the advantage of being suitable for different frequency bands and different output power of the c-frequency forwarding of the digital television. The use performance is favorable, the quality of the digital television signal and the signal coverage of a blind area can be ensured, and the digital television signal is enabled to forwards extend continuously; and a working channel of the frequency agile system can be configured by software according to the requirement of practical engineering application without waiting and restarting and is speedy and convenient.
Owner:SUNWAVE COMM

Method for encapsulating audiovisual content streams in mpeg2 private sections, device for encapsulating audiovisual content in mpeg2 private sections to be multiplexed in a mpeg2 transport stream; interactive application for digital tv; user device; method for transmission of audiovisual content and/or data and communication protocol for data networks

The present invention relates to a method for the transmission of audiovisual content and / or data to user devices without using digital television tuning resources, in that said content is encapsulated in MPEG2 private sections, subsequently multiplexed and transmitted over a digital television signal. The method uses an interactive application transmitted in a digital television signal which, when executed in the digital television receiver, extracts the MPEG2 private sections containing the audiovisual content and / or data from the digital television signal and, using a local area network (LAN) connection, forwards this audiovisual content and / or data to other user devices connected to the same local area network (LAN) as the digital television receiver. Also described is a device for the transmission of audiovisual content and / or data encapsulated in the MPEG2 private section.
Owner:TQTVD SOFTWARE

Digital television translator with PSIP update

A digital television translator includes a digital television receiver for receiving a first digital television signal at a first frequency and generating a digital transport stream from the first digital television signal. The digital transport stream can include original Program and System Information (PSIP) data having RX channel data that is indicative of the first frequency, the first major channel number, and / or the first minor channel number. The digital television translator also includes a PSIP update module for updating the original PSIP data in the digital transport stream by replacing the RX channel data with TX channel data. The TX data is indicative of a second frequency, a second major channel number, and / or a second minor channel number. The digital television translator further includes a digital television modulator for converting the digital transport stream having the updated PSIP data into a second digital television signal at the second frequency, where the second frequency can be the same or different from the first frequency.
Owner:K TECH TELECOMM

Different browsing methods of digital television channels

The invention relates to different browsing methods of digital television channels, comprising the following steps: acquisition and storage of program information in different frequency bands, acquisition and storage of program information of different channels in the same frequency band, comparison of different channel numbers and display of the needed channel content. The methods are characterized in that after starting up a TV, channels are automatically searched and channel information is stored; when a user turns on a browsing mode switch in a user menu of a remote controller to start a function of browsing the first channel program in various frequency bands and then presses CH+ / - on the remote controller, a system obtains the channel number in the current frequency band and all thechannel numbers from the stored channel information, compares the channel numbers, selects the channel with the minimum channel number and plays the content of the channel; after the user continuously presses CH+ / -, the system directly skips to next or previous physical channel, similarly obtains the channel number in the current frequency band and all the channel numbers, selects the channel with the minimum channel number and plays the content of the channel according to the above method while the system skips other digital channels of the current physical channel at the same time; and in the case of only one channel in the frequency band, the content of the current channel is directly displayed, and all the channel programs in all the frequency bands are browsed and displayed sequentially after turning off the browsing mode switch. The methods of the invention can help the user more rapidly understand the content in more frequency bands under the social trend of various digital television program channels, thus reducing browsing time and achieving more humanized operation.
Owner:TPV ELECTRONICS (FUJIAN) CO LTD
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