A method comprising the steps of: receiving a data signal, the data signal including a first video signal and a second video signal, wherein the first video signal comprises a two-dimensional image, said two-dimensional image being a first left, or respectively right, view image of a three-dimensional stereoscopic image at a first video resolution; determining an output display type for viewing video content; decoding the first video signal; decoding the second video signal; outputting a decoded signal based on the output display type; characterized in that the second video signal comprises a reduced resolution three-dimensional stereoscopic image including a reduced resolution left, or respectively right, view image issued from said first left, or respectively right, view image and a reduced resolution right, or respectively left, view image, each at a same resolution lower than said first video resolution; and in that the method further comprises decoding (706, 704) the first video signal and second video signal simultaneously, wherein the step of decoding the first and second video signal includes upsampling the reduced resolution right, or respectively left, view image to the first video resolution; and merging the decoded first video signal and the decoded and upsampled reduced resolution right, or respectively left, view image to obtain a second three-dimensional image having said first video resolution; wherein the output decoded signal is: the decoded first video signal if the output display type is a two-dimensional display type; the decoded second video signal if the output display type is a first three-dimensional display type, the merged video signal if the output display type is a second three-dimensional display type. receiving a data signal, the data signal including a first video signal and a second video signal, wherein the first video signal comprises a two-dimensional image, said two-dimensional image being a first left, or respectively right, view image of a three-dimensional stereoscopic image at a first video resolution; determining an output display type for viewing video content; decoding the first video signal; decoding the second video signal; outputting a decoded signal based on the output display type; characterized in that the second video signal comprises a reduced resolution three-dimensional stereoscopic image including a reduced resolution left, or respectively right, view image issued from said first left, or respectively right, view image and a reduced resolution right, or respectively left, view image, each at a same resolution lower than said first video resolution; and in that the method further comprises decoding (706, 704) the first video signal and second video signal simultaneously, wherein the step of decoding the first and second video signal includes upsampling the reduced resolution right, or respectively left, view image to the first video resolution; and merging the decoded first video signal and the decoded and upsampled reduced resolution right, or respectively left, view image to obtain a second three-dimensional image having said first video resolution; wherein the output decoded signal is: the decoded first video signal if the output display type is a two-dimensional display type; the decoded second video signal if the output display type is a first three-dimensional display type, the merged video signal if the output display type is a second three-dimensional display type. the decoded first video signal if the output display type is a two-dimensional display type; the decoded second video signal if the output display type is a first three-dimensional display type, the merged video signal if the output display type is a second three-dimensional display type.