초록 ▼

From a high definition television signal of a field are derived basic pixels whose number is a quarter of the whole number of pixels of an original image, motional areas in the image are detected by comparing the basic pixels in the relevant field with corresponding basic pixels in the preceding fra

From a high definition television signal of a field are derived basic pixels whose number is a quarter of the whole number of pixels of an original image, motional areas in the image are detected by comparing the basic pixels in the relevant field with corresponding basic pixels in the preceding frame, pixels in the motional areas are selected as additional pixels together with information representing positions of additional pixels in the image, and the basic and additional pixels and the position information are transmitted in time division multiplex mode in such a manner that the basic and additional pixels can be separated from each other at a receiver end without the position information. At the receiver end, when the position information is detected correctly, an image is reconstructed by the received basic and additional pixels under the control of the received position information, whereas when the position information is not detected correctly, an image is reconstructed only from the received basic pixels.

대표청구항 ▼

A system for compressing a bandwidth of an image signal comprising: at a transmitter end deriving from an original image basic pixels whose positions in the image have been predetermined; deriving from the original image additional pixels whose positions are varied in accordance with a property of t

A system for compressing a bandwidth of an image signal comprising: at a transmitter end deriving from an original image basic pixels whose positions in the image have been predetermined; deriving from the original image additional pixels whose positions are varied in accordance with a property of the original image; deriving position signals of the additional pixels; and transmitting the basic and additional pixels and position signals of the additional pixels in such a manner that the basic and additional pixels can be separated from each other without the position signals; and at a receiver end separating the transmitted basic and additional pixels and position signals from each other; and reconstructing an image from both the basic and additional pixels under the control of the position signals when there is no error in the position signals and from only the basic pixels when there is an error in the position signals.