Patent ID: 11962333
Assignee: HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE CO., LTD
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 11:
12. The computer-implemented method of claim 11 further comprising during training:
processing a plurality of training data blocks each having a compression ratio, the computer generating CV*NZ products for each block in the plurality of training data blocks;
generating a first table of the CV*NZ products as a function of the compression ratio;
wherein a vertical threshold indicates a threshold compression ratio, wherein a block with a compression ratio greater than the threshold compression ratio is classified as an actual compressible block, and a block with a compression ratio less than the threshold compression ratio is classified as an actual non-compressible block;
setting a horizontal threshold to a plurality of test values, wherein a block with a CV*NZ product greater than the horizontal threshold is a predicted compressible block, and a block with a CV*NZ product less than the horizontal threshold is a predicted non-compressible block;
generating a second table of true prediction rates and false prediction rates, wherein each entry in the second table has a true prediction rate and a false prediction rate and a test value of the horizontal threshold that generated the true prediction rate and the false prediction rate in the entry;
wherein the true prediction rates and false prediction rates are a function of at least two of:
a number of the predicted compressible blocks,
a number of the predicted non-compressible blocks,
a number of the actual compressible blocks, and
a number of the actual non-compressible blocks;
that are determined by the plurality of test values of the horizontal threshold;
generating a Youden index for each entry in the second table;
selecting as a selected entry an entry in the second table having a Youden index that is larger than Youden indexes for other entries in the second table; and
outputting the horizontal threshold from the selected entry.