What is rate-distortion criteria?
Rate–distortion theory is a major branch of information theory which provides the theoretical foundations for lossy data compression; it addresses the problem of determining the minimal number of bits per symbol, as measured by the rate R, that should be communicated over a channel, so that the source (input signal) …
What is the rate-distortion function?
In the context of causal coding, the rate-distortion function rc(D) is defined to be the minimum average transmission rate such that the average distortion is no larger than D.
What is pruning how it helps to improve the rate-distortion performance?
Removal of a subgroup, referred to as pruning, will reduce the size of the codebook and hence the rate. It may also result in an increase in distortion. Therefore, the objective of the pruning is to remove those subgroups that will result in the best trade-off of rate and distortion.
What is distortion energy theory?
The distortion energy theory says that failure occurs due to distortion of a part, not due to volumetric changes in the part (distortion causes shearing, but volumetric changes due not). The explanation for their survival is that because their shape is not distorted, there is no shearing, therefore no failure.
What is source code information theory?
Source coding is a mapping from (a sequence of) symbols from an information source to a sequence of alphabet symbols (usually bits) such that the source symbols can be exactly recovered from the binary bits (lossless source coding) or recovered within some distortion (lossy source coding).
What is pruning in data compression?
Pruning is a data compression technique in machine learning and search algorithms that reduces the size of decision trees by removing sections of the tree that are non-critical and redundant to classify instances. A tree that is too large risks overfitting the training data and poorly generalizing to new samples.
What is maximum distortion theory?
The maximum distortion criterion (also von Mises yield criterion) states that yielding of a ductile material begins when the second invariant of deviatoric stress. reaches a critical value. It is a part of plasticity theory that mostly applies to ductile materials, such as some metals.
What is the maximum distortion energy theory?
The maximum distortion energy theory ,also known as the Von Mises theory, was proposed by M.T. In this theory failure by yielding occurs when at any point in the body ,the distortion energy per unit volume in a state of combined stress becomes equal to that associated with yielding in a simple tension test.
What is code efficiency in information theory?
Code efficiency is a broad term used to depict the reliability, speed and programming methodology used in developing codes for an application. Code efficiency is directly linked with algorithmic efficiency and the speed of runtime execution for software. It is the key element in ensuring high performance.