A process for recovering metals from a stream rich in hydrocarbons and carbonaceous residues by means of a treatment section, characterized in that it comprises the following steps: sending said stream to a primary treatment, effected in one or more steps, wherein said stream is treated in the presence of a fluxant agent in a suitable apparatus, at a temperature ranging from 80 to 180\xb0 C. A frame interpolator produces interpolated frames from a first video signal given in a first video format by using motion vectors of the first video signal. The reference voltage circuit is adapted to receive a power supply voltage signal from the power supply and supplies a reference voltage signal having a voltage magnitude representative of the power supply voltage level.