| 摘要 |
PURPOSE:To make descramble on plural broadcasting signals possible by detecting a key signal position inserted into the signal of a scrambled specific program and deciding the start of the descrambling operation. CONSTITUTION:When the broadcasting signal of an ordinary program is received by a VTR1, switches 11 and 12 are closed toward a contact (a) side and a video signal and an audio signal inputted into a descrambling circuit 2 are monitored at a VTR receiver 3 through buffer amplifiers 27 and 28 and switches 31 and 32, respectively. When a scramble broadcasting signal is received, each code is separated from an inputted video signal at a data separating circuit 35 and given to a code detection and controller 36 where the code position of the program is detected. Based on the code position signal, a recording start signal is generated as required from a recording start and end signal generating circuit 37 and added to the control circuit 22 of the VTR1. |
