Television – Basic receiver with additional function – For display of additional information
Patent
1993-10-15
1994-10-04
Kostak, Victor R.
Television
Basic receiver with additional function
For display of additional information
348704, H04N 3223
Patent
active
053530675
ABSTRACT:
A vertical direction filter is realized without using an additional memory. If a reduction ratio is larger than 1/2, line memories (11) and (12) are connected in series with each other by switches (SW1) and (SW2) to thereby form one line memory which is capable of storing one original memory. If the reduction ratio is equal to or smaller than 1/2, inputs to and an output from the line memory (11) are each filtered by calculator units (13) and (14) and an adder (15) and then given to the line memory (12) and the switch (SW2) through the switch (SW1) as data about a filtered reduced line. Since the reduction ratio is equal to or smaller than 1/2, the line memories (11) and (12) are both capable of storing one reduced line. An output of the line memory (11) is given to an output terminal (71b) while an input to the line memory (11) is given to an output terminal (71c ) through the switch (SW2). Thus, the line memories which are used in vertical decimation also function as a filter.
REFERENCES:
patent: 4610026 (1986-09-01), Tabata et al.
patent: 4707742 (1987-11-01), Field et al.
patent: 4768093 (1988-08-01), Prodan
patent: 5025315 (1991-06-01), Johary et al.
Kostak Victor R.
Mitsubishi Denki & Kabushiki Kaisha
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