630082

Magix Movie Edit Pro Plus 16 Manual

876
Zoom out
Zoom in
Previous page
1/879
Next page
Quantization scaling
The single pictures in MPEG are saved using a compression method comparable to JPEG with bitmaps
and associated with quality loss. For this single images are divided into 8 x 8 blocks
.
Each one of these blocks is then transformed into an 8 x 8 matrix (a table with rows and columns) using
a DCT (discreet cosinus transformation) mathematical method. Each of these values is produced using all
64 individual pixels of the block, but the values in the matrix are ordered in such a way that the image
information is ordered according to its importance.
This matrix will then be multiplied by another matrix, i.e. the quantization matrix
. Exactly how and why this matrix must be created is the biggest secret of encoder programmers, since
this determines the quality of the whole encoding process. What is known is that the result should contain
as many zeros as possible! These zeros correspond to the "unimportant" image elements mentioned and
will not be transmitted in the data stream.
Depending on the encoder parameters regarding the target bit rate, fewer or more values of the matrix
will be declared unimportant by dividing the quantization matrix by the quantization scaling factor
. Since only whole numbers are used, a division can produce a zero is the remainder is discarded.
This factor is also a direct measure of the sought image
quality of the MPEG data stream, since the "Q" in "Q" factor stands for quantization and quality.
Page 876
… 876 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Magix Movie Edit Pro Plus 16 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Magix Movie Edit Pro Plus 16 in the language / languages: English as an attachment in your email.

The manual is 10,07 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info