Data compression testing

  • What is a compression test testing?

    Compression tests are used to determine a material's behavior under applied crushing loads, and are typically conducted by applying compressive pressure to a test specimen (usually of either a cuboid or cylindrical geometry) using platens or specialized fixtures on a universal testing machine..

The test data compression involves test vector compression on the input side and test response compression on the output side. This test data compression gives us two benefits. 1. It reduces the amount of storage on the tester, which can encompass the lifecycle of older testers that have inadequate storage.

How can test data compression reduce the burden of ate?

One of the methods to reduce the burden of ATE is test data compression.
The advantages of test data compression are as follows:

  1. (i) reduction in memory requirement for ATE and (ii) reduction in testing time

Though many advanced algorithms are used for testing of VLSI circuits, most of them are expensive in terms of test data volume and power.
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What are the classifications of test data compression strategies?

The three broad classifications of test data compression strategies in view of test pattern encoding procedures are as follows:

  1. (i) linear decompression-based schemes
  2. (ii) code-based test data compression schemes
  3. (iii) broadcast-scan-based schemes [ 3 ]

Decompressor with XOR gates and flip-flops is called as linear decompressor [ 4 ].
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What is a data compression Turing test?

A data compression Turing test is proposed to optimize compressibility while minimizing information loss for the end use of weather and climate forecast data.
Many supercomputing centers in the world perform operational weather and climate simulations several times per day 1.

What is scan compression?

Scan compression involves the manipulation of scan input and output data

Some of the studies focus on only one aspect of the problem

For example, code-based scan compression methods that encode the data stream solve only the scan input part of the problem

As a result, such methods have not been adopted in the industry


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