| 摘要 |
<p>PURPOSE:To efficiently attain block coding by applying coding to two kinds of digital color difference signals subjected to line sequential processing for each block of (nXm) samples (n, m are integers being 2 or over) bridged over the lines with different color difference signals arranged thereupon. CONSTITUTION:A coding circuit 12 applies block coding to data read out of a block processing circuit 10 and reduce information quantity (bit number per picture element) and outputted. On the other hand, the color difference signals CN, CW inputted from input terminals 4, 6 are converted into a digital signal by using a sampling clock of a frequency being 1/4 of the luminance signal by A/D converters 14, 16 respectively. The output of the block processing circuit is subjected to block coding by a coding circuit 25. The line sequential color difference signal subjected to block coding is subjected to time base multiplex by a multiplex circuit 30 with a luminance signal subjected to block coding and the result is sent to a transmission line such as communication equipment, magnetic recording and reproducing device via a terminal 32.</p> |
