PURPOSE: To obtain a standard television signal with the factor of picture quality deterioration owing to the band compression of a multiple sub-Nyquist sampling Encoding (MUSE) system removed by providing a filter to limit the high frequency component of the vertical frequency component of a signal from a mixing circuit, a scanning line number converting circuit and so on and executing system-converting.
CONSTITUTION: A first moving picture processing circuit 4 to which a band- compressed high definition television signal is inputted to moving-picture-process, a first still picture processing circuit 3 to still-picture-process, a first filter 101 to limit the vertical high frequency component of a signal from a first mixing circuit 6, a first scanning line number converting circuit 110 to convert the signal from the first filter 101 into the number of scanning lines of a standard television signal and so on are provided. Then, the converting of the number of scanning lines is executed with using the high definition television signal obtained from the first mixing processing circuit 6 of a MUSE decoder. Thus, the signal with picture quality deterioration owing to the band compression of a MUSE system removed can be obtained.
SAGAWA KENTA
ISOBE MITSUO
| JPH02238786A | 1990-09-21 | |||
| JPH03272285A | 1991-12-03 | |||
| JPH03283784A | 1991-12-13 |