| Summary: | 碩士 === 國立中山大學 === 電機工程研究所 === 82 === The requirement of compatibility is important for a HDTV image
coding standard to be compatible among other standards. This is
because most commercial TV are watched on conventional TV and
can't be replaced in years, which means the commercial program,
the support of TV management and maintenance, most keep being
aired to the conventional TV. As a consequence, the
compitibility must be fulfilled for a new TV systems for
transition. So we suggests a compressed encoding method applied
on High Definition Television (HDTV). The purpose of using
this compressed encoding method is to use in line with the
present NTSC television system to receive a HDTV signal, and to
achieve high compression rate. For optimizing the present
television system to achieve HDTV system, the image compression
method is applying Kalman filter to image decoding, whereby the
HDTV signal is separated into compatible and augmentation
signals. The compatible and augmentation signals provide the
source of measurement model and signal model from the Kalman
filter model, respectively. The compatible part is not
compressed and is processed by NTSC standard. The augmentation
part is aimed to achieve high compression ratio by exploiting
the "system parameters". The system parameters is got from the
signal model of Kalman filter model and represents the linear
relationship of brightness between the pixel and its
surrounding.
|
|---|
