Video Processing Flashcards
What the interlaced video format is (and why it was needed)
Interlaced video format is a method of displaying video where each frame is divided into two fields, each containing half of the image lines. It was needed in the past because of the limitations of CRT displays, it allows to reduce flicker and improve image quality on interlaced displays.
What the YCbCr color space it is, and why it is beneficial
YCbCr color space is a color representation method that separates the luminance (Y) and chrominance (Cb, Cr) components of an image. It is beneficial because it reduces the amount of data needed to represent color information, making it more efficient for video compression.
Why we need to compress video data
Video data is compressed to reduce its file size, making it more practical to store, transmit or stream.
What chrominance subsampling is
Chrominance subsampling is a technique that reduces the amount of color information in a video signal by sampling the chrominance (color) component less frequently than the luminance (brightness) component. This allows to reduce the amount of data needed to represent color information, making it more efficient for video compression
What motion prediction and compensation is and why it is used in video coding
Motion prediction and compensation is a technique used in video coding to reduce the amount of data needed to represent a moving image by predicting the motion of the image and only encoding the differences between consecutive frames
What key frames (I-frames), P-frames, and D-frames are
In video compression, key frames (I-frames) contain all the information of a complete frame, P-frames contain the information of the changes between that frame and the last key frame, and D-frames contain only the information of the changes between that frame and the last frame.
