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Related Concept Videos

Reducing Line Loss01:18

Reducing Line Loss

In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
Residuals and Least-Squares Property01:11

Residuals and Least-Squares Property

The vertical distance between the actual value of y and the estimated value of y. In other words, it measures the vertical distance between the actual data point and the predicted point on the line
If the observed data point lies above the line, the residual is positive, and the line underestimates the actual data value for y. If the observed data point lies below the line, the residual is negative, and the line overestimates the actual data value for y.
The process of fitting the best-fit...
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next sampling...
Extraction: Partition and Distribution Coefficients01:14

Extraction: Partition and Distribution Coefficients

The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an organic...
Downsampling01:20

Downsampling

When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it instrumental in...

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Related Experiment Video

Updated: Jul 7, 2026

Swin-PSAxialNet: An Efficient Multi-Organ Segmentation Technique
04:48

Swin-PSAxialNet: An Efficient Multi-Organ Segmentation Technique

Published on: July 5, 2024

A video compression scheme with optimal bit allocation among segmentation, motion, and residual error.

G M Schuster1, A K Katsaggelos

  • 1Network Syst. Div., Adv. Technol. Res. Center, Mount Prospect, IL.

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

This study introduces a theory for optimal bit allocation in video coding, improving efficiency for variable block sizes. The proposed method significantly outperforms H.263 in both rate distortion and subjective quality.

Related Experiment Videos

Last Updated: Jul 7, 2026

Swin-PSAxialNet: An Efficient Multi-Organ Segmentation Technique
04:48

Swin-PSAxialNet: An Efficient Multi-Organ Segmentation Technique

Published on: July 5, 2024

Area of Science:

  • Digital video compression
  • Information theory
  • Computer vision

Background:

  • Variable block size motion-compensated video coders (VBSMCVC) are crucial for efficient video compression.
  • Optimizing bit allocation among quadtree (QT) segmentation, displacement vector field (DVF), and displaced frame difference (DFD) is a key challenge.

Purpose of the Study:

  • To develop a theory for optimal bit allocation in VBSMCVC.
  • To enhance coding efficiency and performance.

Main Methods:

  • Developed a theory for optimal bit allocation using dynamic programming (DP) for lossless coding and Lagrangian relaxation for lossy coding.
  • Derived an optimal QT scanning path based on the Hilbert curve.
  • Implemented a VBSMCVC utilizing a DCT-based DFD encoding scheme.

Main Results:

  • The proposed theory provides an optimal bit allocation strategy.
  • The developed VBSMCVC significantly outperforms H.263 in rate-distortion performance.
  • Subjective quality assessments also show significant improvements over H.263.

Conclusions:

  • The presented theory offers a robust framework for optimizing bit allocation in VBSMCVC.
  • The proposed VBSMCVC demonstrates superior compression efficiency and visual quality compared to existing standards like H.263.