Suppose we have a video of two white points moving toward each other at a uniform rate against a black background. We encode it via MPEG. In one I frame the two points are 100 pixels apart; in the next I frame they have merged. The final point of merger happens to lie at the center of a 16 x 16 macroblock. (a) Describe how you might optimally encode the Y component of the intervening B (or P) frames. (b) Now suppose the points are in color and that the color changes slowly as the points move. Describe what the encoding of the U and V values might look like.

Suppose we have a video of two white points moving toward each other at a uniform rate against a black background. We encode it via MPEG. In one I frame the two points are 100 pixels apart; in the next I frame they have merged. The final point of merger happens to lie at the center of a 16 x 16 macroblock. (a) Describe how you might optimally encode the Y component of the intervening B (or P) frames. (b) Now suppose the points are in color and that the color changes slowly as the points move. Describe what the encoding of the U and V values might look like.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Suppose we have a video of two white
points moving toward each other at a
uniform rate against a black background.
We encode it via MPEG. In one I frame
the two points are 100 pixels apart; in the
next I frame they have merged. The final
point of merger happens to lie at the
center of a 16 x 16 macroblock.
(a) Describe how you might optimally
encode the Y component of the
intervening B (or P) frames.
(b) Now suppose the points are in color
and that the color changes slowly as
the points move. Describe what the
encoding of the U and V values might
look like.

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