Recently, several encryption algorithms have been proposed, which are applied to MPEG-2
video streams. These algorithms try to optimize the encryption process and improve …

A common transcoding operation consists of reducing the file size of a JPEG image to meet
bandwidth or device constraints. This can be achieved by reducing its quality factor (QF) or …

Several quality-aware transcoding systems and methods are described, in which the impact
of both quality factor (QF) and Scaling parameter choices on the quality of transcoded …

In order to transmit pre-encoded digital video over heterogeneous networks, it is necessary
to employ transcoding techniques that convert pre-encoded video streams into streams …

Rate-QP estimation for a P picture is disclosed which involves the steps of: providing an
input group of pictures (GOP); selecting an input P picture within the GOP; and outputting, to …

The independent JPEG Group's JPEG Software, release 6b, Docu mentation Roadmap and
associated Software, published on the Internet at ftp. uu. net (Internet address 192.48. 96.9) …

" Quantizating, in digital signal processing parlance, means the process of approximating a
continuous range of 55 values (or a very large set of possible discrete values) by a relatively …

A method of intra mode prediction uses a block of pixels and their horizontal H pos and
vertical V pos pixel positions and adjacent horizontal and vertical pixels within an input …

A new rate control algorithm is proposed, which is based on so-called/spl rho/-domain rate-
distortion analysis./spl rho/is defined as the percentage of zero discrete cosine transform …

Method and system for low complexity transcoding of images with near optimal quality for
display on a terminal are pre sented. Generating effective transcoding parameters prior to …