| 摘要 |
<p>PURPOSE:To compensate the transmission characteristic with a simple circuit by providing a compensation means giving a prescribed transmission characteristic before or after a D/A converter means in a processing unit applying D/A conversion to an A/D-converted signal after required digital processing and transmitting the result. CONSTITUTION:Each of plural stages of digital signal processing units sending a high Vision TV high definition picture is provided with a resample circuit 2 A/D-converting a transmission signal, a digital signal processing circuit 3 provided with a descrambler 10 or the like to apply required digital processing and a D/A converter circuit 4. Then an LPF 12 is provided after a D/A converter 11, a prescribed roll-off characteristic is provided to the transmission signal to compensate the transmission characteristic. Moreover, the similar processing is provided by providing a digital HPF providing a reverse characteristic to the sinx/x before the converter 11 instead and the transmission characteristic is compensated with simple circuit constitution.</p> |
