METHOD OF FORMING AND TRANSMITTING DIGITAL TELEVISION SIGNALS Russian patent published in 2011 - IPC H04N11/02 

FIELD: information technology.

SUBSTANCE: invention can be used to transmit and receive television (TV) signals for broadcast and industrial-institutional television, generated, for example, using a TV camera or other signal sources of black and white, colour, spectrozonal, three-dimensional or images. At the transmitting side, several analogue synchronous TV signals of gray-scale images are processed to form a brightness E'_Y and two colour difference signals E'_R-Y and E'_B-Y in digital form through analogue-to-digital conversion thereof with sampling frequency of the brightness signal equal to a value f_d, and for colour difference signals equal to a value f_d/2 for multiplexing the digital brightness signal E'_Y and two digital colour difference signals E'_R-Y and E'_B-Y presented in a serial code and separately formed digital synchronisation signals, said signals are transmitted over a communication channel, and at the receiving side inverse operations are performed over the signals compared to the transmitting side, and specifically, signals are demultiplexed, digital signals of the serial code are converted to a parallel k-bit binary code, signals undergo digital-to-analogue conversion and an analogue brightness signal E_Y is formed, as well as two colour difference signals E'_R-Y and E'_B-Y which are then displayed, wherein at the transmitting side the analogue-to-digital conversion operation over signals is performed with sampling frequency equal to f_d/2 for the brightness signal and f_d/4 for the colour difference signals, and the receiving side of the system, after demultiplexing digital signals, the brightness and colour difference signals are stored and read to form digital signals of a TV image with the full number of decomposition elements, wherein it is also possible that, when using interleaved scanning o the TV image at the transmitting side the analogue-to-digital conversion operation is performed with sampling frequency equal to f_d/2 for the brightness signal and f_d/4 for the colour difference signals without shift of clock pulses of the sampling rate in time for (1+2·m) half-frames of the odd field of the TV image and (2+2·m) half-frames of the even field of the TV image, where m=0, 2, 4, 6,…,24 and with shift of clock pulses of the sampling rate in time for duration of one decomposition element for (3+2·n) half-frames of the odd field of the TV image and (4+2·n) half-frames of the even field of the TV image, where n=0, 2, 4, 6,…,22, and at the receiving side of the system, after demultiplexing digital signals with picking up of the brightness and colour difference signals, the signals are stored and then read to form digital images of the initial odd and even fields of the TV image.

EFFECT: generation and transmission of digital television signals in a smaller communication channel frequency band.

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