Title:
エンコーダおよび画像変換装置
Document Type and Number:
Japanese Patent JP5328629
Kind Code:
B2
Abstract:
It is an object to provide a method of calculating a coding cost by which the magnitude relation of the amounts of generated codes can be estimated with high accuracy. A cost calculation part generates a differential block between a coding object block and a prediction block. Hadamard Transform is performed on the differential block to generate a frequency component block. A conversion factor matrix is generated with the information of a quantization matrix reflected thereon. A coding cost is calculated by multiplying components in the frequency component block individually by components in the conversion factor matrix and adding up the multiplied components. A mode selection part selects an optimum predictive coding method on the basis of the coding cost.
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Inventors:
Makoto Saito
Yuuki Haraguchi
Yuuki Haraguchi
Application Number:
JP2009286804A
Publication Date:
October 30, 2013
Filing Date:
December 17, 2009
Export Citation:
Assignee:
Mega Chips Co., Ltd.
International Classes:
H04N19/50; H04N19/102; H04N19/12; H04N19/134; H04N19/136; H04N19/137; H04N19/196; H04N19/503; H04N19/577; H04N19/593; H04N19/60; H04N19/61; H04N19/85
Domestic Patent References:
| JP2005354686A | ||||
| JP2005286645A | ||||
| JP2001136527A | ||||
| JP2001057636A | ||||
| JP7255054A | ||||
| JP7087324A | ||||
| JP5219496A |
Foreign References:
| US20080243971 |
Attorney, Agent or Firm:
Hidetoshi Ueba
Takao Matsuyama
Go Sakane
Kawakami Keiko
Takao Matsuyama
Go Sakane
Kawakami Keiko