Video signal processing apparatus and method

A video signal processing apparatus, comprising:

• a frame rate converter configured to write first and second video signals in a frame memory, the first and second video signals having a first frame frequency and each including a luminance signal and a color difference signal each of which has a first number of bits, to alternately read the first and second video signals from the frame memory, and to convert and output a first frame signal and a second frame signal at a second frame frequency higher than the first frame frequency, the first frame signal being a current frame having the first number of bits, the second frame signal being a frame previous to the current frame, and having a second number of bits composed of upper bits of the first number of bits other than at least one lower bit;
• a first RGB converter configured to convert the luminance signal and color difference signal of the first frame signal to a first RGB signal;
• a second RGB converter configured to place at least one lower bit of the first frame signal on the least significant bit side of the second frame signal to form composite data having the first number of bits and to convert the luminance signal and color difference signal of the composite data to a second RGB signal;
• and
• an overdrive processing unit configured to correct an amplitude of the first RGB signal corresponding to the difference between the first and second RGB signals, wherein
• the frame rate converter is configured to set the second video signal as the second frame signal when the first video signal is set as the first frame signal, and set the first video signal as the second frame signal when the second video signal is set as the first frame signal.