Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-05-03
2005-05-03
Lee, Young (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
Reexamination Certificate
active
06888892
ABSTRACT:
A method for efficiently padding a macroblock of a video object plane employs two new instructions. The instructions, PadToRight and PadToLeft, are applied in alternating sequence during a PadPass1operation and a PadPass2operation. The results of these two operations are then averaged to pad each transparent pixel in each row of a macroblock that includes at least one opaque pixel. A Shift_in register is used to temporarily store data to facilitate the operation implemented by these instructions. Once the transparent pixels in each row have been padded horizontally, pixels in rows having shape data equal to zero (indicating all pixels in the row are transparent) are padded in a pre-processing step, followed by an upward propagation step. The two instructions are preferably implemented using 2:1 multiplexers implemented with an arithmetic logic unit. The method is particularly useful in set-top boxes, games, and other video applications.
REFERENCES:
Berekovic, Mladen et al., 1999. Instruction Set Extensions for MPEG-4 Video.Journal of VLSI Signal Processing, 23:27-49.
Chandreskhar, L. et al., 2000. Bi-directional data flow architecture for padding in MPEG-4. (Part of the IS&T/SPIE Conference on Media Processors 2000),SPIE, 3970:161-166.
Chung Chris Yoochang
Garg Rohit
Karadayi Kerem
Kim Donglok
Kim Yongmin
Anderson Ronald M.
Lee Young
University of Washington
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