System comprising a first encoder for coding a first digital signal and a second encoder for coding a second digital signal (e.g. stereoscopic video signal)

(-- A summary 57) The (correction -- owner) purpose The conventional system based on three-dimensional video coding and formation of video decoding, Since a left-hand side picture and a right-hand side picture are independently coded mutually by the encoder in the system and are decoding-ized, it improves becoming insufficient efficiency. Composition By supplying to an encoder the switching component to which the signal showing a left-hand side picture and the signal showing a right-hand side picture are supplied, it can predict based on a left-hand side picture or a right-hand side picture, and this improves prediction, therefore an encoder raises the efficiency of coding. Moreover, by designing in order to adjust the ratio of the signal with which a left-hand side picture is expressed for this switching part to the signal showing a right-hand side picture and to add two adjusted signals to the next, an extraordinary advantage in / that a right ratio is also / prediction is attained, and this raises the efficiency of the whole coding further.