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An adapt flexible macroblock ordering strategy based on unequal protection scheme is presented for video transcoding. The key point of our scheme is selecting the important macroblocks which belong to a separate slice group under prior protection in transmission. The judgement of the importance of the macroblocks is based on the differences of the DCT coefficients of neighbouring subblocks in a macroblock...
To overcome the overflowing and information loss caused by huge volume compressed video transmitting over dynamic changeable bandwidth, in this work, we propose a frame layer adaptive rate control scheme suitable for the video transcoding from mpeg2 to H.264 which is able to convert the bit rate of the transcoded bitstream according to the variable bandwidth. The original compressed information such...
According to the fact that video information mostly concentrated on low frequency domain and the relationship between the block DCT coefficients and subband approximations, a new arbitrary resizing algorithm for video transcoding is presented. The new algorithm can realize fractional resizing in DCT domain, and can be adapt to intra and inter transcoding
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