Integrated circuit for processing digital signals in video camera having electronic zooming function

An integrated circuit for processing digital signals for a video camera capable of effecting an electronic zooming function in which an output from a solid state image sensing device spatially modulated by a color filter is A/D converted into a digital signal and temporarily stored in a field memory, during operation of the electronic zooming function, the stored digital signal is read from the field memory, said integrated circuit comprising:

• first, second and third 1H delay elements for successively delaying the digital signal read from said field memory by 1 horizontal period;
• first, second, third and fourth luminance/color signal (Y/C) separating means for separating said digital signal and output signals from each of said first, second and third 1H delay elements, respectively, into luminance components and two types of line sequential color components;
• first RGB synthesizing means for forming a first set of three primary color signals based on said output signals from said first, second and third Y/C separating means;
• second RGB synthesizing means for forming a second set of three primary color signals based on said output signals from said second, third and fourth Y/C separating means;
• luminance signal interpolating means for synthesizing luminance signals corresponding to new display points which are to be formed in carrying out the electronic zooming function, based on output signals from said second and third Y/C separating means;
• and
• color signal interpolating means for synthesizing three primary color signals corresponding to the new display points which are to be formed in carrying out the electronic zooming function, based on said first and second sets of three primary color signals;
• and
• means for converting the three primary color signals supplied from said color signal interpolating means into one string of color signals by time divisionally multiplexing and band compressing each of said color signals.