RU2007891C1 - Method for data reception and transmission through television broadcasting channel - Google Patents

Abstract

FIELD: communications. SUBSTANCE: method involves encoding source data at transmitting side, modulation of carrier frequency, sending of resulted signal through television broadcasting channel. At receiving side signal is demodulated and stored. Modulated signal is transmitted information band of brightness video signal and decoded data are encoded again. Modulated laser light is stored on removable optical storage medium. Transmitting part of device has source information pick-up 1, TV adapter 2 and TV transmitter 3. TV adapter 2 has encoder 3 and demodulator 4. Receiving part of device has TV receiver 6, TV adapter 7 and optical-mechanical recording device 10. TV adapter 7 has demodulator 8 and decoder 9. Optical mechanical recording device 10 has laser source 11, optical modulator 12, positioning unit 13 and removable information medium 14. EFFECT: increased functional capabilities. 1 dwg

Description

 The invention relates to information technology and can be used to create individual data banks, artificial intelligence systems, etc.

 An analogue of the proposed method is a method and apparatus for reproducing audio and video information, according to which the source data to users of personal computers upon their requests from the databases are transmitted via telephone communication channels. If necessary, users can save these data for later use by recording them in their personal computers on appropriate storage media.

 The disadvantage of the analogue is the low transmission speed, i.e., the small information capacity of data transmitted to users via narrow-band telephone communication channels and, as a result, the practical impossibility of creating individual databases of large information capacity, as well as their online updating, which significantly limits the functionality of users.

 The closest in technical essence and the achieved result analogue is the method of receiving periodically transmitted teletext data, according to which the initial data is encoded, kneaded during the reverse scan frames in the video signals transmitted during broadcasting of television broadcasting programs, modulated with them the carrier frequency of the television transmitter, transmitted jointly on the television a communication channel, receive, demodulate, select the transmitted data from the received television signals, decode and the encoded data is written into the RAM from which the request of the user may be caused on the screen of the television receiver.

 The disadvantage of the prototype is the very small information capacity of the array of data transmitted at a high speed that is accessible to users (usually, therefore, of the most primitive, for example, everyday nature), which is also destroyed during subsequent communication sessions, which completely excludes the possibility of users creating their individual databases. Therefore, the user is deprived of the opportunity to create a perfect individual database, as well as the ability to quickly update large data arrays in it. All this significantly limits its functionality.

 The aim of the invention is to increase the information capacity of transmitted and received data, as well as providing the possibility of their multiple use.

 This is achieved by the fact that in the method of transmitting and receiving data on a television broadcasting channel, according to which the source data is encoded on the transmitting side, the carrier frequency is modulated with the encoded data and the modulated signal is transmitted on the television broadcasting channel, the received signal is demodulated on the receiving side, the demodulated data is decoded and remember the initial data before encoding, packetize, the modulated signal is transmitted through the television broadcasting channel in the frequency band of the brightness video signal, and received decoded data is re-encoded, the encoded data is modulated by the intensity of the laser radiation and the intensity-modulated laser radiation data recorded on a removable optical storage media.

 These distinguishing features are significant because their presence ensures the achievement of the goal, and their absence, on the contrary, makes it unattainable. Indeed, the regular high-speed transmission of large information arrays of data through a broadband channel of television broadcasting, which are then stored on removable optical storage media after receiving them, allows computer users (including personal computers) to create quickly updated individual databases and thereby significantly expand their functional capabilities. The transfer of this data in exclusive mode further increases the speed of their transmission. And the packaging and re-encoding of decoded received data ensures optimal matching of the radio and optical data transmission channels, which increases the reliability of their recording on a removable optical storage medium, providing the highest reliability and the lowest relative cost of storing information.

 According to the proposed method, all the source data newly received in the database, equipped with appropriate descriptors, is regularly in exclusive mode (i.e., in periods of time when television broadcasting programs are not broadcast) are transmitted via television communication channels. In addition, data corresponding to preliminary individual user requests is also broadcast. Moreover, to protect individual requests from unauthorized access, the transmitted data is accordingly encrypted. In addition, the transmitted data is encoded and packetized to increase transmission reliability. Users from this information stream regularly retrieve the necessary data in accordance with the descriptors indicated by them and write them onto removable optical storage media in their individual database, which allows them to possess all the latest information on topics of interest to them at very modest costs.

 The drawing shows a functional diagram of an example implementation of the proposed method.

 The implementation diagram of a method for transmitting and receiving data on a television broadcast channel contains at the transmitting end of the path a source 1 of source information (for example, a data bank that is equipped with a computer for storing information, a device for preparing data on magnetic tapes, personal computers with means for reading data from paper media or microfiche and other devices), a television adapter for transmitter 2 (including at least encoder 3 and a modulator 4) and a television transmitter 5, which is part of the national or international television center broadcasting. For simplicity, on the receiving end of the path to the output of the television receivers 6 (household or special), only one of them is shown in the drawing in series, their television adapters for the receiver 7 are connected in series, including at least a demodulator 8 and a decoder 9, and optical-mechanical storage devices 10. Each optical -mechanical storage device 10 includes optically coupled source of laser radiation 11 (for example, a semiconductor, solid-state or other laser with corresponding additional electronic, for example power supply, and optical, for example, diffraction grating-nodes (not shown), an optical modulator 12 (for example, electro-optical, acousto-optical), positioner 13 (for example, in the form of a movable optical head containing a focusing lens) and a removable optical information carrier 14 (for example , cylindrical, disk). An electric drive 15 of its rotation is kinematically connected with a removable optical information carrier 14. To the electrical input of the optical modulator 12 through an encoder 16 containing nodes providing both interference USTAINABLE and channel coding) connected to the output of the television receiver adapter 7 (actually the output of the decoder 9).

 The method of transmitting and receiving data on a television broadcast channel operates as follows.

 The preparation of the source data in the information source 1 is carried out using a computer for storing information (for example, EC1045), a device for preparing data on magnetic tapes, as well as personal computers, to which data reading devices (for example, scanners) from paper or other storage media are connected. The prepared source data is regularly delivered at the time allotted for this through the television adapter of transmitter 2, in which they are packetized, noise-resistant coding, and other necessary processing in encoder 3, as well as modulation of the carrier frequency in modulator 4, is fed to the television transmitter 5, by which they are emitted at a speed of 1-2 Mbit / s. This information is received by the television receiver 6, and in the television adapter of the receiver 7 using the demodulator 8, it is demodulated and decoded (including decrypted) and unpacked using the decoder 9. Recovered at the output of the television adapter of the receiver 7, the initial data corresponding to the descriptors specified by the user is supplied to the optical-mechanical storage device 10, in which they are recorded on removable optical information carriers 14 (preferably of the WORM type — write once read many). Of the latter, the user compiles and constantly updates his individual database. Data recording on removable optical media 14 is carried out as follows. Since the data recording on the optical medium 14 occurs with an unacceptable error level, in the encoder 16 the initial data is encoded by an error-correcting code (for example, the Reed-Solomon code), which provides the necessary (by 6-8 orders of magnitude) increase in the recording reliability. In addition, since the rotation speed of the interchangeable optical medium 14 provided by the electric drive 15 is not quite constant, in the encoder 16 the source information is also encoded with a channel code (for example, an MFM code), which allows to select clock pulses necessary for reading it decoding error-correcting code. The output signals of the encoder 16 in the optical modulator 12 provides modulation of the intensity of the laser radiation emitted by its source 11. This radiation by the positioner 13 is output in accordance with the specified address to the corresponding information track of the removable optical medium 14, which is recorded.

 The invention allows for very modest hardware and financial costs to create individual databases in accordance with their interests to almost all users of personal computers, as well as to implement a fundamentally new information technology, according to which the created individual databases enable the user to accumulate, quickly update and store an exhaustively full amount the data he needs (including those received by emergency individual requests from the most complete banks given n) directly in your personal computer, which expands its functional and business capabilities.

 (56) Patent of Germany N 3640774, cl. H 04 N 7/087, published. 1987.

Claims (1)

 METHOD FOR TRANSMITTING AND RECEIVING DATA ON A TELEVISION BROADCASTING CHANNEL, according to which the source data is encoded on the transmitting side, the carrier frequency is encoded with information encoded and transmitted via the television broadcasting channel, the received signal is demodulated on the receiving side, the demodulated signal is decoded and stored, characterized in that in order to increase the information capacity, as well as to ensure the possibility of their multiple use, on the transmitting side, the source data is packetized before encoding, the modules are transmitted ovanny signal channel of television broadcasting in the band of the luminance of the video signal on the receiving side the received decoded data is re-encoded, modulated in intensity laser radiation encoded data, recorded data is modulated by the intensity of the laser radiation to a removable optical media.