Image analysis – Image compression or coding – Interframe coding
Patent
1996-06-21
2000-08-08
Lee, Thomas D.
Image analysis
Image compression or coding
Interframe coding
348415, G06K 936, H04N 712
Patent
active
061012769
ABSTRACT:
An apparatus and method a method for performing two-pass real time video compression is provided. Tactical decisions such as encoding and quantization values are determined in software, whereas functional execution steps are performed in hardware. By appropriately apportioning the tasks between software and hardware, the benefits of each type of processing are exploited, while minimizing both hardware complexity and data transfer requirements. One key concept that allows the compression unit to operate in real time is that the architecture and pipelining both allow for B frames to be executed out of order. By buffering B frames, two-pass motion estimation techniques can be performed to tailor bit usage to the requirements of the frame, and thereby provide a more appealing output image.
REFERENCES:
patent: 5185819 (1993-02-01), Ng et al.
patent: 5640208 (1997-06-01), Fujinami
patent: 5657086 (1997-08-01), Tahara et al.
Adiletta Matthew James
Chow King-Wai
Galbi Duane E.
Ho Samuel William
Rose Robert Clint
Chen Wenpeng
Compaq Computer Corporation
Lee Thomas D.
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