Title :
Position-dependent encoding
Author :
Apostolopoulos, John ; Pfajfer, Aleksandar ; Jung, Hae Mook ; Lim, J.S.
Author_Institution :
Res. Lab. of Electron., MIT, Cambridge, MA, USA
Abstract :
In typical MC-DCT compression algorithms, up to 90% of the available bit rate is used to encode the location and amplitude information of the nonzero quantized DCT coefficients. Therefore, efficient encoding of the location and amplitude information is extremely important for high quality video compression. In this paper we describe the position-dependent encoding (PDE) approach for encoding the DCT coefficients. This method attempts to exploit the inherent differences in statistical properties of the run-lengths and amplitudes as a function of position. This paper includes preliminary comparisons between the PDE scheme and conventional coding approaches. The PDE approach can be applied in any transform/subband filtering scheme for image or video compression
Keywords :
data compression; discrete cosine transforms; filtering theory; image coding; motion compensation; runlength codes; statistical analysis; video coding; MC-DCT compression algorithms; amplitude information; bit rate; discrete cosine transform; image compression; location information; motion compensation; position-dependent encoding; quantized DCT coefficients; run-lengths; statistical properties; subband filtering; transform filtering; video compression; Bit rate; Compression algorithms; Discrete cosine transforms; Encoding; Entropy; Filtering; Laboratories; Signal processing algorithms; TV; Video compression;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.389447
