Title :
MPEG 4:2:2 stream transcoding to MPEG 4:2:0 stream in the compressed domain
Author :
Chen, Li ; Yu, Songvu ; Sun, Jun
Author_Institution :
Inst. of Image Commun. & Inf. Process., Shanghai Jiao Tong Univ., China
Abstract :
In this paper, how to transcode MPEG 4:2:2 streams to MPEG 4:2:0 streams in the compressed domain is discussed in detail. Firstly, the algorithm for accomplishing low-pass filtering in the compressed domain is formulated based on the properties of the DCT. Next, a theoretical analysis of drift introduced by the compressed domain conversion is carried out. Then analysis result suggests that the low order filter should be chosen for reducing conversion drift. Finally, experimental results show that our approach could produce reasonable performances.
Keywords :
discrete cosine transforms; filtering theory; low-pass filters; transform coding; video coding; DCT; MPEG 4:2:0 stream; MPEG 4:2:2 stream transcoding; compressed domain conversion; conversion drift reduction; discrete cosine transforms; low order filter; low pass filtering; moving picture experts group; Discrete cosine transforms; Filtering; Image coding; Low pass filters; Nonlinear filters; Streaming media; TV; Transcoding; Transform coding; Video compression;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281097
