This paper presents an adaptive motion compensation technique for encoding the enhancement layers in spatially scalable videocoding. Based on the base layer reconstructed quantized prediction error, quantization para...
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ISBN:
(纸本)9781424417650
This paper presents an adaptive motion compensation technique for encoding the enhancement layers in spatially scalable videocoding. Based on the base layer reconstructed quantized prediction error, quantization parameters and motion vectors of both the base and enhancement layers, the proposed approach automatically selects either the interlayer subband motion compensation, or encoding the enhancement layer without using any information from the base layer, which we call independent encoding. Compared to the SVC spatial scalability, the proposed adaptive method achieves an improvement up to about 0.6 dB with about 33% encoder computational complexity reduction.
Wavelet videocoding using motion vectors estimated simultaneously at the transmitter and receiver side from the transmitted image data have been reported to have good compression capabilities, comparable to the non-s...
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ISBN:
(纸本)0819437034
Wavelet videocoding using motion vectors estimated simultaneously at the transmitter and receiver side from the transmitted image data have been reported to have good compression capabilities, comparable to the non-scalable version of H.263. When scalability is required, the comparison turns even more in favour of the wavelet coding scheme. This paper shows that it is possible to reduce the bit-rate further in backward motion estimation schemes by using the certainty of each estimated motion vector. In this paper we report a lowering in bit rate of about 20 % by using the motion vector certainty as background information in the entropy coding / decoding process. We also propose a low-complexity algorithm which does not require motion estimation / compensation, but uses the motion vector certainty.
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