| 摘要 |
<p>PURPOSE:To prevent a code word disadvantageous for the extraction or identificial reproduction of a clock from being allocated to a code word for video data by adopting a specified generating polynomial. CONSTITUTION:A signal B(X) provided by dividing a data word D(X) composed of a digital composite video signal with a generation polynomial G(X) and further dividing it with a polynomial X+1 is transmitted, on the reception side, the X+1 is multiplied to this signal B(X) and the generation polynomial G(X) is multiplied so as to recover the data word D(X). In such a encoding transmitting system, the generation polynomial G(X) is defined as a 20th-degree polynomial G(X)=X<20>+X<3>+1. By selecting the generation polynomial G(X) to the 20th degree, the data word D(X) to generate the worst pattern in transmissive data concerning the video data of a 20-bit cycle can become a code word containing any inhibit code. Therefore, bit sequence independence characteristics can be improved concerning a flat field to sppear sometimes on practical use.</p> |
