Title :
Efficient lossless video coding compatible with MPEG-2
Author :
Oam, Ryoma ; Ohta, Mutsumi
Author_Institution :
C&C Media Res. Labs., NEC Corp., Kawasaki, Japan
Abstract :
This paper proposes a DCT-based lossless video coding scheme that has compatibility with MPEG-2. It is obtained by modifying the DCT and the quantization process in MPEG-2, and it outperforms lossless coding based on an ordinary DCT by 20% in terms of the compression ratio. In addition, the compressed data can be decoded not only with the corresponding decoding algorithm but also with MPEG-2. The images decoded with MPEG-2 retain high quality and a PSNR that exceeds 40 dB. This lossless coding scheme is suitable for applications where contribution quality is required, such as inter-studio transmission and video cassette recording in studios
Keywords :
data compression; decoding; discrete cosine transforms; image sequences; quantisation (signal); transform coding; video coding; DCT; MPEG-2; PSNR; compressed data; compression ratio; contribution quality; decoding algorithm; high image quality; inter-studio transmission; lossless video coding; quantization process; video cassette recording; video sequences; Decoding; Discrete cosine transforms; Image coding; PSNR; Propagation losses; Quantization; Transform coding; Video coding; Video compression; Video recording;
Conference_Titel :
Communications, 1998. ICC 98. Conference Record. 1998 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-4788-9
DOI :
10.1109/ICC.1998.685142
