5 Questions
What is the reason for decimating the Cr and Cb components by two?
To reduce the number of samples based on human perception
What is the purpose of converting RGB color space to Y, Cr & Cb color space?
To decrease the amount of video sample data based on human perception
What is the characteristic of Y component in the Y, Cr & Cb color space?
It has full bandwidth as it is very sensitive to human perception
What does DCT stand for in the context of intra-frame compression?
Discrete Cosine Transform
What type of redundancy does intra-frame compression (spatial redundancy) aim to exploit?
Spatial Redundancy
Study Notes
Introduction to Video Compression
- Raw video data requires compression due to limited and expensive communication and storage capabilities.
- Example of HDTV video signal: 1280X720 pixels/frame, progressive scanning at 60 frames/s, requiring 20 Mb/s bandwidth.
- Compression ratio of 70:1 is required for HDTV channel bandwidth.
Types of Redundancy in Video Compression
- Spectral Redundancy: exists in the frequency domain.
- Spatial Redundancy (Intra-frame compression): exists within a single frame.
- Temporal Redundancy (Inter-frame compression): exists between frames.
- Entropy Redundancy: can be reduced using lossless compression techniques.
Test your knowledge on basic video compression techniques with this quiz covering topics such as video compression, motion compensation, search for motion vectors, and H.261 MPEG 1. This quiz is based on the content from the Fundamentals of Multimedia 3rd edition, Chapter 10.
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