Television – Format conversion – Conversion between standards with different aspect ratios
Patent
1996-09-25
1998-08-11
Kostak, Victor R.
Television
Format conversion
Conversion between standards with different aspect ratios
H04N 701
Patent
active
057934347
ABSTRACT:
In an aspect ratio converting apparatus and method, the apparatus includes a controller and a memory generates the controller write and read enabling signals, a write clock signal of a first frequency and a read clock signal of a second frequency different from the first frequency. The memory is used for writing video data synchronized with the first frequency in response to the write enabling signal and reading the written video data synchronized with the second frequency in response to the read enabling signal. The memory has at least the capacity of storing pixel data corresponding to the difference between the first frequency and the second frequency. The power consumption of an aspect ratio converter is reduced by converting an aspect ratio using a FIFO memory. A miniaturized device and high-speed performance can be attained. Further, the number of control signals necessary for reading and writing data from/in the memory is reduced. Also, the delay time of an input signal is reduced to less than one line.
REFERENCES:
patent: 5331346 (1994-07-01), Shields et al.
patent: 5459521 (1995-10-01), Usami
patent: 5677737 (1997-10-01), den Hollander
patent: 5677738 (1997-10-01), Mizutani et al.
Kostak Victor R.
Samsung Electronics Co,. Ltd.
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