Survey of Dirac: A Wavelet Based Video Codec for Multiparty Video Conferencing and Broadcasting - Intelligent Video Event Analysis and Understanding - page 211

Survey of Dirac: A Wavelet Based Video Codec
for Multiparty Video Conferencing and
Broadcasting
Ahtsham Ali, Nadeem A. Khan, Shahid Masud, and Syed Farooq Ali *
Abstract. The basic aim of this topic chapter is to provide a survey on BBC Dirac
Video Codec. That survey, would not only provide the in depth description of
different version of Dirac Video Codec but would also explain the algorithmic
explanation of Dirac at implementation level. This chapter would not only provide
help to new researchers who are working to understand BBC Dirac video codec
but also provide them future directions and ideas to enhance features of BBC
Dirac video codec.
Compression is significantly important because of being bandwidth limited or
expensive for widespread use of multimedia contents over the internet. Compression
takes the advantage in limitation of human perception due to which it is not able to
process all the information of perfectly reproduced pictures. We can compress the
pictures without the loss of perceived picture quality. Compression is used to exploit
the limited storage and transmission capacity as efficiently as possible.
The need of efficient codec's has gained significant attraction amongst researchers.
The applications of codec's range from compressing high resolution files,
broadcasting, live video streaming, pod casting, and desktop production. Depending
on the type of application, the requirements of the codec's change.
1 Background of Codecs
Video Codecs broadly fall under two categories. One is based on the DCT
Transform and the other one on the Wavelet Transform. As the DCT transform