Multi-function USB video capture chip using bufferless data compression
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United States of America Patent
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Aug 14, 2001
Issued Date -
N/A
app pub date -
Jun 28, 2000
filing date -
Oct 6, 1997
priority date (Note) -
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Abstract
A method and system for capturing live video signal data using bufferless data compression is disclosed. Live video signal data is vertically scaled. A 4:2:2 to 4:2:0 color format conversion is performed simultaneous with the vertical scaling step. A one-dimensional bufferless discrete cosine transform is performed on the scaled live video signal data to create a plurality of scaled DCT coefficients. Each of the plurality of scaled DCT coefficients are then Huffman coded. Each of the Huffman encoded DCT coefficients may then be sent via a USB interface to a USB bus.
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