1. A pseudo 3D image generation device comprising: basic depth model generation units that generate a plurality of basic depth models having basic scenes used for generating a pseudo 3D image signal; a combination unit that combines the plurality of basic depth models for generating a composite depth model based on a first control signal indicating composite percentages for combining the plurality of basic depth models; a weighting unit that multiplies a non-3D image signal by a weighting coefficient based on a second control signal indicating the weighting coefficient for putting a weight on the non-3D image signal; a depth estimation data generation unit that generates depth estimation data from the multiplied non-3D image signal and the composite depth models; a texture shift unit that shifts a texture of a non-3D image based on the depth estimation data and a third control signal including a parameter indicating a depth and a parameter indicating a convergence, for generating the pseudo 3D image signal; and first to third determination units that determine whether the first to third control signals are present, wherein if the first determination unit determines that the first control signal is not present, the combination unit generates the composite depth model based on pre-set composite percentages, if the second determination unit determines that the second control signal is not present, the weighting unit puts a weight on the non-3D image signal based on a pre-set weighting coefficient, and if the third determination unit determines that the third control signal is not present, the texture shift unit generates the pseudo 3D image signal based on pre-set values indicating a depth and a convergence.