This paper describes an efficient method to generate compressed video streams with low complexity decoding requirements. This is particularly targeted at portable media. players;where the use of such video streams lea...
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ISBN:
(纸本)9789077381380
This paper describes an efficient method to generate compressed video streams with low complexity decoding requirements. This is particularly targeted at portable media. players;where the use of such video streams leads to reduced power consumption thus extending the battery life. The proposed method is based on the fact that motion compensation is the 'most complex operation in standard H.264/AVC video decoders, mainly because of the operations involved in computing sub-pixel predictions. By using a measure of the computational complexity needed to decode a stream and including it in the encoder cost function used to select the type of sub-pixel motion vector, it is shown that the decoding complexity of compressed video streams can be reduced with negligible penalty in rate-distortion performance. The experimental results show that such optimized constrainedcoding method is capable of achieving significant decoding complexity reduction at the expense of negligible PSNR loss within the range of bit rates with practical interest.
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