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Non-scalable to scalable video conversion method, scalable to non-scalable video conversion method
Non-scalable to scalable video conversion method, scalable to non-scalable video conversion method
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机译:不可缩放至可缩放视频转换方法,不可缩放至不可缩放视频转换方法
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摘要
The invention relates to a cost-effective method of modifying a non-scalable coded video signal for generating a scalable coded video signal comprising a base layer and a set of enhancement layers. The base layer results from a bit shift performed by a shift matrix applied on coefficients, and an extraction of a reduced number of least significant bit planes. The enhancement layers result from the bit-plane coding of the least significant bit planes. Contrary to a requantization method that would identically truncate all coefficients in a block and would cause visual artifacts, the shift matrix allows a progressive attenuation of the coefficients. The base layer is then composed of dampened coefficients. The invention also relates to a cost-effective method of modifying said scalable coded video signal for generating a non-scalable coded video signal.
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