METHODS AND APPARATUS FOR QUANTIZATION AND DEQUANTIZATION OF A RECTANGULAR BLOCK OF COEFFICIENTS

WIPO Patent Application WO/2013/036845

A3

A system includes an encoder that performs quantization on a rectangular block of quantized transform coefficients and a decoder that performs dequantization on a rectangular block of transform coefficients. The decoder is configured to receive a WxH block of quantized transform coefficients, wherein W is a row width of the block and H is a column height of the block. The decoder is further configured to apply dequantization processing to the WxH block of quantized transform coefficients to generate a block of transform coefficients, which are used to generate a picture corresponding to the WxH block of quantized transform coefficients. The dequantization processing comprises applying a first dequantization algorithm when an output M of a function (I) is equal to an integer value, and applying a second dequantization algorithm when the output M is equal to a non-integer value.

KUNG WEI-YING (US)
FANG XUE (US)
KIM JAE-HOON (US)

PCT/US2012/054276

May 02, 2013

September 07, 2012

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GEN INSTRUMENT CORP (US)
KUNG WEI-YING (US)
FANG XUE (US)
KIM JAE-HOON (US)

H04N7/26; H04N7/00

GUO L ET AL: "Non-Square Transform for 2NxN and Nx2N Motion Partitions", 6. JCT-VC MEETING; 97. MPEG MEETING; 14-7-2011 - 22-7-2011; TORINO; (JOINT COLLABORATIVE TEAM ON VIDEO CODING OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ); URL: HTTP://WFTP3.ITU.INT/AV-ARCH/JCTVC-SITE/,, no. JCTVC-F563, 16 July 2011 (2011-07-16), XP030009586

PAYNE, Susan R. et al. (Libertyville, Illinois, US)

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