Television – Bandwidth reduction system – Data rate reduction
Patent
1998-02-26
1999-11-09
Kostak, Victor R.
Television
Bandwidth reduction system
Data rate reduction
348393, 348396, 348453, H04N 724
Patent
active
059824328
ABSTRACT:
In this picture signal converting apparatus, digital picture signals compressed in a DVC format are decoded to non-compressed picture signals of a 4:1:1 color component type which are composed of color difference signals and luminance signals. The color difference signals of the 4:1:1 color component type arranged in a matrix are removed on every other row to halve the number of color difference signals in a y direction, and a color difference signal is added to a position between each pair of color difference signals adjacent to each other in an x direction to double the number of color difference signals in the x direction. Therefore, converted color difference signals of a 4:2:0 color component type are produced from the color difference signals. Values of the converted color difference signals are determined according to values of the color difference signals. Thereafter, the converted color difference signals and the luminance signals of the non-compressed picture signals are combined to produce converted digital picture signals of the 4:2:0 color component type.
REFERENCES:
patent: 5253056 (1993-10-01), Puri et al.
patent: 5412428 (1995-05-01), Tahara
patent: 5539663 (1996-07-01), Agarwal
patent: 5650824 (1997-07-01), Huang
patent: 5712687 (1998-01-01), Naveen
"Information technology--Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s--Part 2: Video"; ISO/IEC 11172-2: 1993 (E).
"Information technology--Generic coding of moving pictures and associated audio information: Video"; ISO/IEC 13818-2:1996 (E).
Komiya Daisaku
Uenoyama Tsutomu
Kostak Victor R.
Matsushita Electric - Industrial Co., Ltd.
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