Patent ID: 8345161
Filing Date: 2013-01-01
Classification: G09G,H04N

Abstract:
1. A signal processing device for changing a resolution of a synthesized image signal obtained by synthesizing a first image signal and a second image signal, comprising: a first separating unit for separating the synthesized image signal into a third image signal containing a component of the first image signal and a fourth image signal containing no component of the first image signal, based on presence/absence of the first image signal in the synthesized image signal; a resolution changing unit for changing both resolutions of the third image signal and fourth image signal separated by the first separating unit to the same resolutions; and a synthesizing unit for synthesizing the third image signal and the fourth image signal with the resolutions changed to the same resolutions by the resolution changing unit, wherein the resolution changing unit comprises: a second separating unit for separating the fourth image signal into two systems; a first multiplying unit for multiplying the fourth image signal of one system separated by the second separating unit by a predetermined coefficient; a second multiplying unit for multiplying the fourth image signal of the other system separated by the second separating unit by a complement of the predetermined coefficient; a delay unit for delaying the fourth image signal of the one system multiplied by the first multiplying unit; and an adding unit for adding the fourth image signal of the other system multiplied by the second multiplying unit and the one fourth image signal delayed by the delay unit.