Toshihiro Gai

NTSC/PAL/SECAM digital video decoder with high-precision resamplers

This paper presents architecture of an all-digital multistandard video decoder that uses a single crystal oscillator of fixed frequency. The proposed digital video decoder requires no analog component and is based on a fully synchronous design. Resampling schemes that create line-locked sampling and burst-locked sampling are described. Phase jitter of 1 ns or less is achieved using 27 MHz clock, and 3-D (3-dimensional) Y/C separation becomes feasible in the free-running clock system. High-precision digital phase-locked loops and fractional delay filters implement resampling of video data, which eliminate the need for analog PLLs that generate clocks locked to input video.

Wide band 3D Y/C separation circuit for PAL system with reduced memory size

This paper reports newly developed 3D Y/C separation circuit of PAL system, which has been realized with a minimum frame memory structure, the same as that of an NTSC system, and has no deterioration of high-frequency components.