Image analysis – Image compression or coding – Adaptive coding
Reexamination Certificate
2004-03-25
2008-08-19
Ahmed, Samir A (Department: 2624)
Image analysis
Image compression or coding
Adaptive coding
C382S232000, C382S251000, C375S213000
Reexamination Certificate
active
07415161
ABSTRACT:
Method and apparatus for reducing memory access while de/compressing multimedia files, videos, or image files. An image is divided into blocks, and a frequency data matrix corresponding to a frequency transformed and quantized block is stored in a memory for later de/compression. The method includes registering a bit plane containing a plurality of bits in a register module, wherein each bit represents whether a corresponding element of the data matrix equals zero. While accessing the memory for the data matrix, if a bit of the bit plane shows that its corresponding element of the data array is zero, the element is not accessed from the memory. In checking bits corresponding to elements not yet accessed; if these bits show that elements not accessed are all zero, accessing for the data array can be terminated without accessing them. Thus, memory access can be reduced to occupy less bandwidth of the memory.
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Ahmed Samir A
Faraday Technology Corp.
Hsu Winston
Vanchy, Jr. Michael
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