RU94018598A - Digital television system - Google Patents

Digital television system

Info

Publication number
RU94018598A
RU94018598A RU94018598/09A RU94018598A RU94018598A RU 94018598 A RU94018598 A RU 94018598A RU 94018598/09 A RU94018598/09 A RU 94018598/09A RU 94018598 A RU94018598 A RU 94018598A RU 94018598 A RU94018598 A RU 94018598A
Authority
RU
Russia
Prior art keywords
mhz
digital
frequency
analog
channel
Prior art date
Application number
RU94018598/09A
Other languages
Russian (ru)
Inventor
Б.И. Волков
By]
Original Assignee
Б.И. Волков
By]
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Б.И. Волков, By] filed Critical Б.И. Волков
Priority to RU94018598/09A priority Critical patent/RU94018598A/en
Publication of RU94018598A publication Critical patent/RU94018598A/en

Links

Landscapes

  • Television Systems (AREA)
  • Color Television Systems (AREA)

Abstract

FIELD: radio communications; digital television broadcasting. SUBSTANCE: digital television system has sending end incorporating transducer, three analog-to-digital converters full TV signal transmitter; it also has receiving end; introduced in sending end are master oscillator, frequency divider, fourth analog-to- digital converter, and four composite signal shapers; transmitter is four-channel device; receiving end has four receiving and processing channels for codes of sampling signal and three main colors, three OR gates, three delay circuit units, three control units, radiation modulation unit, first digital-to-analog converter, syne pulse selector, and line and frame sweep unit, two piezodeflectors of line and frame sweep, matte screen, second sound-code digital-to-analog converter, audio-frequency filter, power amplifier, and loudspeaker. On sending end, analog signals of three main colors and sampling pulses are converter into four digital streams transmitted simultaneously over four channels at four carrier frequencies. On receiving end, that is, on digital receiver, four radio signals are received and without being converted into analog form, they are presented as video image on matte screen without using color picture tube. Video signal sampling frequency is 13.5 MHz, sampling level is 255, video signals are coded separately by infra-red modulation. Clock frequency is 54 MHz, data transmission speed over four channels is 432 Mbit/s, frequency bands occupied in first channel are 132.3Hz/carrier 675 MHz/, in second channel, 133.6 Hz /668 MHz/, in third channel, 132.3 Hz /661 MHz/, in fourth channel, 129,6 Hz /648 MHz/; total, 531 Hz. EFFECT: reduced frequency band, provision for digital television broadcasting in ultrahigh-frequency band, improved safety of television sets as they are low-voltage devices.

Claims (1)

Изобретение относится к технике радиосвязи и может быть использовано для цифрового телевещания с приемом на цифровые телевизионные приемники. Система является одновременной цифровой системой телевидения. Техническим результатом являются сокращение полосы частот при цифровом телевещании до 531 Гц, что в 112000 раз меньше против прототипа, в 15000 раз меньше, чем у существующей аналоговой системы телевидения (8 МГц), осуществление цифрового телевещания в диапазоне дециметровых волн и повышение безопасности эксплуатации телеприемников, т.к. они становятся низковольтными устройствами. Сущность изобретения в том, что в цифровую систему телевидения, содержащую передающую сторону в составе фотоэлектрического преобразователя, трех АЦП , передатчика полного ТВ сигнала и приемную сторону, введены на передающей стороне задающий генератор, делитель частоты, четвертый АЦП и четыре формирователя группового сигнала, а передатчик выполнен четырехканальным, приемная сторона выполнена в составе четырех трактов приема и обработки кодов сигнала дискретизации и трех основных цветов, трех элементов ИЛИ, трех блоков элементов задержек, трех блоков управления, блока модуляции излучений, первого ЦАП, селектора синхроимпульсов и блока строчной и кадровой разверток, двух пьезодефлекторов строчной и кадровой разверток, матового экрана, второго ЦАП кодов звука, фильтра звуковой частоты, усилителя мощности и громкоговорителя. На передающей стороне аналоговые сигналы трех основных цветов и импульсы дискретизации преобразуются в четыре цифровых потока, которые одновременно передаются по четырем каналам на четырех несущих частотах. На приемной стороне - цифровом приемнике четыре радиосигнала принимаются и без преобразования в аналоговую форму преобразуются в видимое цветное изображение на матовом экране без помощи цветного кинескопа. Частота дискретизации видеосигналов 13,5 МГц, уровней квантования 255, кодирование раздельное методом ИКМ. Тактовая частота 54 МГц, скорость передачи информации четырьмя каналами 432 Мбит/с, занимаемые полосы частот в первом канале 135 Гц (несущая 675 МГц), во втором - 133,6 Гц (668 МГц), в третьем - 132,3 Гц (661 МГц), в четвертом - 129,6 Гц (648 МГц), в сумме 531 Гц.The invention relates to radio communications technology and can be used for digital broadcasting with reception on digital television receivers. The system is a simultaneous digital television system. The technical result is a reduction in the frequency band for digital television broadcasting to 531 Hz, which is 112,000 times less than the prototype, 15,000 times less than the existing analog television system (8 MHz), digital television broadcasting in the decimeter wavelength range and increased safety of operation of television receivers, because they become low voltage devices. The essence of the invention is that in a digital television system containing a transmitting side as part of a photoelectric converter, three ADCs, a transmitter of a full TV signal and a receiving side, a master oscillator, a frequency divider, a fourth ADC and four shapers of a group signal are introduced on the transmitting side, and a transmitter made four-channel, the receiving side is made up of four paths for receiving and processing codes of a sampling signal and three primary colors, three OR elements, three blocks of delay elements to three control units, a modulation block radiation of the first DAC, and a clock selector unit horizontal and vertical sweeps, two pezodeflektorov line and frame scans, frosted screen, a second audio DAC codes audio frequency filter, a power amplifier and a loudspeaker. On the transmitting side, analog signals of three primary colors and sampling pulses are converted into four digital streams, which are simultaneously transmitted over four channels at four carrier frequencies. On the receiving side, a digital receiver, four radio signals are received and without conversion to analog form are converted into a visible color image on a matte screen without the help of a color picture tube. The sampling frequency of video signals 13.5 MHz, quantization levels 255, separate coding by PCM. The clock frequency is 54 MHz, the information transfer rate is four channels 432 Mbps, the occupied frequency bands in the first channel are 135 Hz (carrier 675 MHz), in the second - 133.6 Hz (668 MHz), in the third - 132.3 Hz (661 MHz), in the fourth - 129.6 Hz (648 MHz), in total 531 Hz.
RU94018598/09A 1994-05-23 1994-05-23 Digital television system RU94018598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94018598/09A RU94018598A (en) 1994-05-23 1994-05-23 Digital television system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94018598/09A RU94018598A (en) 1994-05-23 1994-05-23 Digital television system

Publications (1)

Publication Number Publication Date
RU94018598A true RU94018598A (en) 1996-08-20

Family

ID=48447703

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94018598/09A RU94018598A (en) 1994-05-23 1994-05-23 Digital television system

Country Status (1)

Country Link
RU (1) RU94018598A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2474854C1 (en) * 2011-10-20 2013-02-10 Владимир Степанович Корякин Projection television method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2474854C1 (en) * 2011-10-20 2013-02-10 Владимир Степанович Корякин Projection television method

Similar Documents

Publication Publication Date Title
ES467786A1 (en) Video composite transmission system integrating encoded data channels into blanking and synchronizing signal
US5430492A (en) Method of transmitting digital HDTV signals
GR3015093T3 (en) Transmitter, transmission method and receiver.
CA2025521A1 (en) Dynamically responsive catv system with shared fiber optic link
GB1218015A (en) Improvements in or relating to systems for transmitting television signals
JPH01198840A (en) Transmitter and receiver for a number of digital data flows
CA2121381A1 (en) Multiplexing of digitally encoded ntsc and hdtv signals over single microwave communication link from television studio to tower transmitter facility for simultaneous broadcast (simulcast) to customer sites by transmitter facility
WO2001035588A3 (en) Analogue to digital and digital to analogue conversion for broadband transmission
RU98107732A (en) METHOD FOR JOINT TRANSFER OF DIGITAL AND ANALOGOMODULATED BROADCASTING SIGNALS AND / OR BROADCAST TV SIGNALS
US3996607A (en) System for digital transmission of color television signals
JPS5539440A (en) Tuning system of terminal unit for catv system
RU94018598A (en) Digital television system
GB2110034A (en) Private communication system
RU2103839C1 (en) Digital color television system
JPH08274711A (en) Optical transmission equipment, reception device, and cable television system
RU93044351A (en) DIGITAL COLOR TELEVISION SYSTEM
RU2208917C2 (en) Digital tv system
FI75702B (en) Method for sending TV transmissions with stereo sound as well as a coder and decoder for implementing the method
CA1273103C (en) Broadband signal broadcasting system
RU2416877C1 (en) System for transmitting and receiving sound broadcasting signals
SU1109954A1 (en) Videotelephone communication device
ES2091989T3 (en) PROCEDURE FOR THE PREPARATION OF TELEVISION SIGNS ON CARRIER AND / OR TONE SIGNALS AS WELL AS USE.
RU2103836C1 (en) Method of transmission of additional discrete information in composition of full television signal and device for its realization
RU2173030C2 (en) Digital tv system
JP2985259B2 (en) Cable TV signal transmission system