Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1997-11-13
2000-07-11
Britton, Howard
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
348390, 348394, H04N 712, H04N 1102, H04N 1104
Patent
active
060883952
ABSTRACT:
A compressing/decompressing apparatus comprising a receiver, a memory interface, a compressor and a decompressor is disclosed. The receiver receives a video graphics signal comprising a plurality of video graphics packets, each comprising a plurality of pixels. The memory interface is coupled between the frame buffer memory and the compressing and decompressing device as a data transfer interface. The compressor sequentially receives a video graphics packet of the video graphics signal, truncates a predetermined length of LSBs of each pixel in the video graphics packet to form a compressed video graphics signal comprising of a plurality of compressed video graphics packets, and stores the compressed video graphics signal in a frame buffer memory. The decompressor sequentially receives a compressed video graphics packet of the compressed video graphics signal, recovers each pixel of the compressed video graphics packet with an adjusted value of the predetermined length to form a decompressed video graphics signal comprising of a plurality of decompressed video graphics packets.
REFERENCES:
patent: 4754487 (1988-06-01), Newmuis
patent: 5469190 (1995-11-01), Masterson
patent: 5696710 (1997-12-01), Hague et al.
patent: 5699079 (1997-12-01), Gosset
patent: 5844608 (1998-12-01), Yu et al.
Ju Shang-Tzu
Wang Chi-Hui
Britton Howard
Diep Nhon T
Winbond Electronics Corp.
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