DCT-based video frame-skipping transcoder

Due to high computational complexity and quality degradation introduced by conventional frame-skipping transcoders, a DCT-based video frame-skipping transcoder is proposed recently. However, the transcoding process of the motion compensated macroblocks in the DCT domain becomes the bottleneck since IDCT and DCT processes are required. In this paper, we propose a new architecture of the frame-skipping transcoder to reduce the computational complexity of motion compensated macroblocks in the frame-skipping process. The new architecture transcodes the dominant region of an MC macroblock in the DCT domain by making use of the DCT coefficients from the incoming bistream and some pre-computed shifiing operators. By using OUT proposed shifted version of the dominant vector. the re-encoding errors introduced in the dominant region can be avoided. On the other hand, an adaptive transcoding architecture to transcode the boundary of MC marcoblocks and to perform error compensation of MC macroblo...

• Type: Conference
• Year: 2003
• Where: ISCAS
• Authors: Kai-Tat Fung, Wan-Chi Siu
• Keywords: Computational Complexity, Frame-skipping Transcoder, ISCAS 2003, Motion Compensated Macroblocks