Television system for high-definition television and a television transmitter and receiver suitable therefor.

摘要

A compatible television system for high-definition and for standardized low-definition television. In a transmitter (1) in the system a high-definition video signal (VS1) is generated which is split into a contour signal (HVC2) which on display shows details in the horizontal and vertical directions, and a low-definition video signal (VS6). The low-definition video signal (VS6) is converted into a low-definition video signal (VS1) in conformity with the standard. The contour signal (HVC2) is also converted, but is transmitted periodically over several picture periods (HVC3). Both these converted signals are transmitted or stored, respectively in two separate signal channels (3,4), each suitable for the standard low-definition television. In a receiver (2) the standard video signal (VS7) can be utilized directly for low-definition display by a standard display device (8). In addition, a receiver (2) comprises a high-definition display device (7) in which the converted signals are reconverted and, after having been combined (48) result in a high definition video signal suitable for high-definition display by a picture display apparatus (49). As high-definition in the region of movement in the picture may disturb the picture quality the contour signal may be locally suppressed on display.