Scan converter of television receiver and scan converting method thereof

Scan converter for a television receiver comprising:

• a means for determining horizontal, vertical and time axis detail degrees from a composite video signal;
• a means for separating a luminance signal and a chrominance signal from the composite video signal in accordance with each said detail signal;
• a means for detecting a first field to be interpolated, a second field which is a previous field of said first field and a third field which is a later field of said first field, from said separated luminance signal;
• a means for generating control signals by logically operating on said each detail signal;
• a means for executing a median operation by putting weights to substantial pixel samples existing in said first, second and third fields in accordance with said control signal;
• a means for 2/1 time compressing said median operated signal and a presently applied field;
• and
• a means for increasing the scanning lines in double by selectively switching said 2/1 time compressed signals.

Scan converting method for a television receiver comprising steps for:

• judging a horizontal, vertical, and time axis detail degrees from a composite video signal;
• separating a luminance signal and chrominance signal from composite video signal in accordance with each said judged detail degree;
• detecting a first field to be interpolated, a second field which is a previous field of said first field and a third field which is a later field of said first field, from said chrominance signal;
• logically combining each said judged detail degree so as to generate control signals;
• executing median operation by putting weights to substantial pixel samples existing in said first, second, and third fields in accordance with said control signals;
• 2/1 time compressing said median operated signal and a presently applied field;
• and
• increasing the scanning lines in double by selectively switching said 2/1 time compressed signals.

Scan converter for a television receiver comprising:

• a means for determining horizontal, vertical and time axis detail degrees from a composite video signal;
• a means for separating a luminance signal and a chrominance signal from the composite video signal in accordance with each said detail signal;
• a means for detecting a first field to be interpolated, a second field which is a previous field of said first field and a third field which is a later field of said first field, from said separated chrominance signal;
• a means for generating control signals by logically operating on said each detail signal;
• a means for executing a median operation by putting weights to substantial pixel samples existing in said first, second and third fields in accordance with said control signal;
• a means for 2/1 time compressing said median operated signal and a presently applied field;
• and
• a means for increasing the scanning lines in double by selectively switching said 2/1 time compressed signals.