| 摘要 |
<p>PURPOSE:To send a still picture between digital TV receivers through the use of a general-purpose telephone line network by sending a picture data written in a picture memory of a digital TV receiver for picture transmission to a digital TV receiver for picture reception via a transmission line, writing the data in a built in picture memory and displaying it on a monitor. CONSTITUTION:The write to a picture memory 21 is stopped by a memory controller 22 at a digital TV receiver for picture transmission, the readout from the picture memory 21 is repeated and the picture data read from the picture memory 21 is converted into a serial data by a P/S conversion circuit 28, modulated with a prescribed analog signal at a modulator 31 of a MODEM 30 and the result is outputted to a transmission line 40 via an NCU 33. A demodulator 72 at the digital TV receiver 5 for picture reception converts the data into a digital data, an S/P conversion circuit 28 converts the data into a parallel picture data and it is written in a picture memory 61. The picture data written in the picture memory 61 is rand by the memory controller 62 and outputted on a monitor 64.</p> |
