Tools for Video Compression
*Luma Range Expansion
*Black Levels
*Gamma Correction
Toosl for Audio Compression
*Resampling Audio
*Setting Volume
*Adjusting channels and bit rates
*Reducing Noise
ENCODING
‐Encoding means defining the correct parameters, such as data rate, frame size, and frame rate, to get optimum results for the project.
‐It’s most important to understand the goals that the compressed video is meant to achieve.
ÆChoosing a data rate mode
Data rate modes include:
• average limited ‐ the most common type of data rate limitation.
‐In this mode, you specify the average data rate, and the codec tries to make sure that the file ends up at the requested average.
‐The codec varies the rate up or down to match the changing difficulty of the video.
‐Most CD‐ROM and QuickTime codecs work this way.
