Patent ID: 6115073
Filing Date: 2000-09-05
Classification: H04N

Abstract:
A signal converting apparatus for converting a first digital picture signal having a luminance signal component and a color signal component into a second digital picture signal different from the first digital picture signal, comprising:a memory for storing a coefficient to convert the luminance signal component of said first digital picture signal into a luminance component of said second digital picture signal for each class;a class decision circuit for deciding a class from the luminance signal component of said first digital picture signal;a first arithmetic circuit for reading a coefficient corresponding to a class decided by said class decision circuit from said memory, performing the product-sum-operation of the read coefficient and the luminance signal of said first digital picture signal, and obtaining the luminance signal component of said second digital picture signal;a second arithmetic circuit for performing the product-sum-operation of a coefficient based on the physical relationship of the scanning lines of said first digital picture signal and said second digital picture signal, and the color signal component of said first digital picture signal, and obtaining the color signal component of said second digital picture signal; anda first decimation circuit for decimating the number of taps of the luminance signal component of the first digital picture signal to obtain said second digital picture signal.