| abstract |
Encoding parameters of picture and higher layers ofnimportance to a number of applications, and encodingnparameters of slice and lower layers of no importance tonall applications are converted into auxiliary packetsninserted respectively into a V-blanking area and an H-blankingnarea of a video-data signal output by a history-information-multiplexingnapparatus employed in a video-decodingnsystem. On the other hand, a video-encodingnsystem extracts back the auxiliary packets superposed onnthe V-blanking area and the H-blanking area from an inputnbase-band video signal. As a result, a technique ofnsuperposing information on data can be changed innaccordance with the importance of the information andnrequired information can be fetched with ease. |