Podcast
Questions and Answers
What is the main disadvantage of DCT-based JPEG compression?
What is the main disadvantage of DCT-based JPEG compression?
- Equal subbands
- Robust under transmission errors
- Facilitates progressive transmission
- Noticeable block boundaries (correct)
Why is wavelet-based compression considered an improvement over DCT-based compression?
Why is wavelet-based compression considered an improvement over DCT-based compression?
- Higher compression ratio
- Concentrated coefficients at lower frequencies
- Use of uniform quantization
- No need to block the image (correct)
What type of transformation is used in original JPEG compression?
What type of transformation is used in original JPEG compression?
- Quantization Transformation
- Discrete Cosine Transformation (DCT) (correct)
- Discrete Fourier Transformation (DFT)
- Discrete Wavelet Transformation (DWT)
What does JPEG 2000 offer that makes it more computationally expensive than original JPEG?
What does JPEG 2000 offer that makes it more computationally expensive than original JPEG?
At low bit rates, which compression method experiences a sharp degradation in image quality?
At low bit rates, which compression method experiences a sharp degradation in image quality?
What feature of wavelet-based compression makes it more robust under transmission errors?
What feature of wavelet-based compression makes it more robust under transmission errors?
What is the main deficiency of the current JPEG standard in low bit rate compression performance?
What is the main deficiency of the current JPEG standard in low bit rate compression performance?
What is a limitation of the current JPEG standard in handling large images?
What is a limitation of the current JPEG standard in handling large images?
What is a drawback of the current JPEG standard in handling transmission in noisy environments?
What is a drawback of the current JPEG standard in handling transmission in noisy environments?
Why is the current JPEG standard not applied to compound documents?
Why is the current JPEG standard not applied to compound documents?
What type of imagery is the current JPEG standard optimized for?
What type of imagery is the current JPEG standard optimized for?
What is a major deficiency of the current JPEG standard in handling lossless and lossy compression?
What is a major deficiency of the current JPEG standard in handling lossless and lossy compression?
What is a key limitation of the current JPEG standard regarding image size?
What is a key limitation of the current JPEG standard regarding image size?
What issue does the current JPEG standard have when applied to computer-generated imagery (Graphics)?
What issue does the current JPEG standard have when applied to computer-generated imagery (Graphics)?
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