| 摘要 |
FIELD: TV. SUBSTANCE: present invention can find use in reproduction of TV image with intermediate conversion of interlace standard of image disassembly into progressive standard when frame of progressive (line-by-line) standard of disassembly is synthesized from two half-frames of interlace standard. Device converting interlace of TV image into progressive scanning has first unit of field delay and unit of line delay which inputs are joined together and are connected to input of device which is also linked to first input of first adder which second input is connected to output of unit of line delay and which output is coupled to input of scale-of-two circuit. Output of first unit of field delay is connected to first input of first multiplier which output is connected to first input of second adder which second input is linked to output of second multiplier and which output is coupled to first input of line converter. Given invention is aimed at improvement of quality of TV image consisting in elimination of interline flicker and in increase of vertical definition. For this purposes known device is inserted with second unit of field delay, first subtracter, first amplitude detector, first low-pass filter, first unit of half-line delay and first amplitude limiter connected in series and second subtracter, second amplitude detector, second low-pass filter and second amplitude limiter connected in series as well as first and second delay lines. Input of first delay line is connected to output of scale-of-two circuit and its output is linked to first input of third adder via third multiplier. Output of second delay line is connected to second input of third adder via fourth multiplier. Output of third adder is connected via unit of half-frame delay to first input of second multiplier. Output of first unit of field delay is linked to input of second unit of field delay. Integrated input of device is connected to second input of first subtracter, to input of second delay line, to first input of second subtracter which second input is coupled to output of unit of line delay. Output of first amplitude limiter is connected to second inputs of first and second multipliers. Output of second amplitude limiter is linked to second inputs of third and fourth multipliers. Output of second delay line is also connected to second input of line converter which output is output of device. EFFECT: improved quality of TV image. |
