| 摘要 |
PURPOSE:To reduce number of encoded bits while improving the quality of a reproduced picture by utilizing even the environmental condition at the receiver side displaying a reproduced picture so as to encode a picture signal. CONSTITUTION:A picture signal inputted from an input terminal 1 at a point 1 is subject to redundancy reduction by an encoding processing circuit 2 and the result is encoded. In this case, the encoding processing circuit 2 receives the environmental information at a location in which a reproduced picture signal outputted from an output terminal 7 is observed as a video from an environment detection circuit 4 having an input terminal 8 through a transmission line 6 and changes a parameter for the encoding processing method and the processing with the environmental information according to a predetermined rule adaptively. A decoding processing circuit 3 receives the same information as the environment information sent to the encoding processing circuit 2 from the environment detection circuit 4, changes the parameter for the processing and the decoding processing method adaptively the same as that of the encoding processing circuit 2 by using the information to decode the code and to supply the reproduced picture signal to the output terminal 7. Thus, number of encoded bits is saved. |
