METHOD OF COMPRESSING DIGITAL VIDEO STREAM IN TELEVISION COMMUNICATION CHANNEL Russian patent published in 2012 - IPC H04N7/50 

FIELD: physics.

SUBSTANCE: invention relates to digital television and particularly to compression of a digital video stream in a television communication channel. A field sequence is divided into groups of three types: O-fields, which act as the reference; N-even fields, which are encoded via prediction based on the previous field within one frame; M-odd fields, which are coded with prediction based on the previous odd field from another frame. To improve visual quality of the image according to the disclosed method, odd and even fields change places in the entire video sequence or group of frames. Frames with a higher image definition are formed as a result. To increase efficiency of compressing a digital stream, the disclosed method employs cutting of readings in N-fields horizontally and vertically with subsequent restoration thereof at the receiving side, wherein two neighbouring N-fields form a full half-frame (field).

EFFECT: communication channel bandwidth reduction, as well as high efficiency of digital conversion of a video signal, lying in additional cutting of the volume of digital information and increasing visual quality of the image, with sufficiently easy implementation.

13 dwg, 1 tbl