| 摘要 |
<p>PURPOSE:To stabilize a control and to improve a picture quality by executing an encoding control with the estimation of an information content quantity. CONSTITUTION:A digitized video signal is inputted from an input terminal 1, and sent to a transmission line 14 through a blocking circuit 2, a two-dimensional orthogonal converting circuit 3, a delaying circuit 4, a quantizer 6, an effective block deciding circuit 7, a scan converting circuit 8, variable length encoding circuits 9 and 10, a time division code massive circuit 11 and a transmitting part buffer memory 12, An encoding control circuit 5 estimates the information content of a video signal, which is an object, prior to the encoding, and controls an encoding parameter of the quantizing characteristic of the quantizer 6 by the result. A receiving side is composed of a receiving part buffer memory 14, an encoding separating circuit 15, variable length decoding circuits 16 and 17, a scanning converting circuit 18, a switching circuits 19, a two-dimensional orthogonal reverse converting circuit 20 and a television scanning circuit 21, and a digitizing video signal is outputted to an output terminal 22.</p> |
