| 摘要 |
<p>PURPOSE:To scarcely deteriorate the quality of a picture by outputting an error flag when an error exceeding the correction capability occurrs, and using a delay means whose delay amount is integer-times of a horizontal scanning period. CONSTITUTION:When a PCM decoder circuit 32 is capable of error correction, switches 50, 54 are connected to N-contacting point, but if the quantity of errors exceeds the correction capable extent, they are connected to E-contacting point. In such a way, the decoder circuit 32 switches the switches 50, 54. It 32 also functions as a delay line provided with a delay amount equivalent to the share of one off two lines of recording image signals. If the error correction is no longer available, an error flag turnes on, and the switches 50, 54 turns to an E-connecting point. Then the output of a line memory 52 is supplied to a frame memory 36, and at the same time, an output signal from the line memory 52 supplied to its own input side through a switch 50 to circulate the signal.</p> |
