The literature of cryptography has a curious history. Secrecy, of course, has always played a central
role, but until the First World War, important developments appeared in print in a more or less
timely fashion and the field moved forward in much the same way as other specialized disciplines.
As late as 1918, one of the most influential cryptanalytic papers of the twentieth century, William F.
Friedman’s monograph The Index of Coincidence and Its Applications in Cryptography, appeared as
a research report of the private Riverbank Laboratories [577]. And this, despite the fact that the work
had been done as part of the war effort. In the same year Edward H. Hebern of Oakland, California
filed the first patent for a rotor machine [710], the device destined to be a mainstay of military
cryptography for nearly 50 years.
H.264/AVC, the result of the collaboration between the ISO/IEC
Moving Picture Experts Group and the ITU-T Video Coding
Experts Group, is the latest standard for video coding. The goals
of this standardization effort were enhanced compression efficiency,
network friendly video representation for interactive
(video telephony) and non-interactive applications (broadcast,
streaming, storage, video on demand). H.264/AVC provides
gains in compression efficiency of up to 50％ over a wide range
of bit rates and video resolutions compared to previous standards.
Compared to previous standards, the decoder complexity
is about four times that of MPEG-2 and two times that of
MPEG-4 Visual Simple Profile. This paper provides an overview
of the new tools, features and complexity of H.264/AVC.
A novel met hod t o p artially compensate sigma2delta shap ed noise is p rop osed. By injecting t he comp en2
sation cur rent int o t he p assive loop f ilte r during t he delay time of t he p hase f requency detect or ( PFD) , a maximum
reduction of t he p hase noise by about 16dB can be achieved. Comp a red t o ot he r compensation met hods , t he tech2
nique p rop osed he re is relatively simple and easy t o implement . Key building blocks f or realizing t he noise cancel2
lation , including t he delay va riable PFD and comp ensation cur rent source , a re sp ecially designed. Bot h t he behavior
level and circuit level simulation results a re p resented.
A heap is a binary tree satisfying the following
conditions:
This tree is completely balanced.
If the height of this binary tree is h, then leaves
can be at level h or level h-1.
All leaves at level h are as far to the left as
possible.
The data associated with all descendants of a
node are smaller than the datum associated
with this node.
數(shù)據(jù)異常處理。The main source file is "dabort.s": with suitable -PreDefines or
a corresponding "options-setting" file, it assembles to the data
abort veneer. This is described in detail in the documentation.
The "dabort.h" file contains definitions of some constants used
in the data abort veneer s interface to the rest of the system
- again, this is described in the documentation.
The "option.s" file is an example "options-setting" file.
The files adi_ssl_init.h and adi_ssl_init.c are used to define the functions
adi_ssl_Init() and 慳di_ssl_Terminate()?which initialize and terminate all the
Blackfin System Services in the appropriate order, for a particular EZ-Kit, depending
on the Blackfin processor used.
