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Efficient Motion Vector Composition Algorithm by Activity Measurement for Downscaled Video Transcoder
Ching-Ting HSU Mei-Juan CHEN
IEICE TRANSACTIONS on Communications
Publication Date: 2006/03/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Multimedia Systems for Communications" Multimedia Systems for Communications
video transcoding, downscaled video transcoder, motion vector, motion estimation, DCT,
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When the frame size is downscaled for video transcoding, the new motion vector (MV) must be computed. This paper presents an algorithm to utilize the activity measurement by DC value and the number of non-zero quantized DCT coefficients in the residual macroblock to compose the motion vector. It can reduce the complexity for motion estimation and improve the performance of the spatial domain video transcoder.