| 摘要 |
<p>PURPOSE:To improve band compressibility by eliminating an influence of the chrominance subcarrier of a color TV signal, by using inphase sampling points for the chrominance subcarrier. CONSTITUTION:The block for the Hadamard transform is formed of eight sampling points, inphase sampling points dj.1 and dj.4 on the j-th (j=1. 2...) horizontal scanning line, inphase sampling points dj+1.1 and dj+1.4 on the j+1-th horizontal scanning line, and similarly dj+2.1 and dj+2.4 and dj+3.1 and dj+3.4. Similarly, blocks are formed one after another to perform the Hadamard transform over the entire region of the screen. Thus, an influence of the color signal of a color TV signal is eliminated by selecting inphase points as sampling points to centralize frequency components of the signal at a low frequency, thereby improving band compressibility.</p> |
