Toplam kayıt 6, listelenen: 1-6
Decoder side candidate motion vector selection for B-frames in H.264 video coding
In H.264 standard, because of differential coding of motion vectors, sudden motion changes in object boundaries increase the amount of bits used for coding especially at low bitrate regimes. In this paper, we propose a ...
Hierarchical quantization indexing for wavelet and wavelet packet image coding
(ELSEVIER SCIENCE BV, 2010-02)
In this paper, we introduce the quantization index hierarchy, which is used for efficient coding of quantized wavelet and wavelet packet coefficients. A hierarchical classification map is defined in each wavelet subband, ...
Spherical Coding Algorithm for Wavelet Image Compression
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2009-05)
In recent literature, there exist many high-performance wavelet coders that use different spatially adaptive coding techniques in order to exploit the spatial energy compaction property of the wavelet transform. Two crucial ...
Spherical representation in wavelet packets for image coding
In this paper, we present an adaptation of the spherical coder, which has been developed for wavelet transform, to wavelet packets. This coder uses local energy as a direct measure to differentiate the spatial informatin ...
Wavelet image coding using the spherical representation
In this paper, we introduce the "spherical representation", which provides a new adaptive framework for modeling and coding the image information in wavelet subbands. Based on this representation, a practical coding algorithm ...
Decoder side true motion estimation for very low bitrate b-frame coding
In H.264 standard, coding of motion vectors constitutes a significant portion of total bitrate especially at low bitrate regimes. This is because differential coding of motion vectors is inefficient when the bit budget is ...