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Title:
MOVING IMAGE ENCODING METHOD AND DECODING METHOD
Document Type and Number:
Japanese Patent JP3675135
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To accomplish a high coding efficiency by switching a padding method in accordance with a characteristic that is held by an alpha plane of a decomposed specific pixel block from plural different padding methods which exist.
SOLUTION: A shape discriminator 155 of an encoder 150 sequentially discriminates a shape that is shown by an input alpha plane 154 and switches a padding method, a scanning method and an inverse scanning method. First an intra inter coding changeover switch 152 is switched to select intra-coding, the discriminator 155 discriminates the shape of the plane 154 and a signal is sent to a padding device 158, a scanner 160 and an inverse scanner 165. A shape which is represented by sample value in an 8×8 pixel block of the alpha plane is discriminated in each decomposed 8×8 pixel block, a padding method is decided in accordance with its characteristic and a scanning method and an inverse scanning method are decided from the method.


Inventors:
Mitsusaka, Satoshi
Nakaya, Yuichiro
Application Number:
JP1997000290717
Publication Date:
July 27, 2005
Filing Date:
October 23, 1997
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H04N19/60; H04N19/102; H04N19/129; H04N19/136; H04N19/176; H04N19/189; H04N19/20; H04N19/21; H04N19/25; H04N19/46; H04N19/503; H04N19/61; H04N19/625; H04N19/70; H04N19/91; (IPC1-7): H04N7/30
Domestic Patent References:
JP10023404A
JP9065335A
Foreign References:
Attorney, Agent or Firm:
作田 康夫