Variable length coding method and variable length decoding...

Details Variable length coding method and variable length decoding... Variable length coding method and variable length decoding...

H - Electricity

04

N

H04N 7/30 (2006.01) H04H 20/57 (2008.01) H04H 60/91 (2008.01) H04W 4/06 (2009.01) G06T 9/00 (2006.01) H04N 7/50 (2006.01)

Patent

CA 2625292

The present invention is a variable length coding method for coding coefficients in each block which are obtained by performing frequency transformation on picture data of a moving picture per block having a predetermined size, and comprises: a coefficient scanning step of scanning the coefficients in the block in a predetermined order; and a coding step of coding the coefficients scanned in the coefficient scanning step into variable length codes in a predetermined order by switching a plurality of tables to be used for coding. Here, a direction of switching between the tables may be one-directional. Also, the coding may be non-arithmetic coding.

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