Title:
IMAGE COMPRESSION DEVICE, IMAGE COMPRESSION METHOD, AND IMAGE COMPRESSION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2005/125216
Kind Code:
A1
Abstract:
A high-frequency integration circuit (32) detects characteristic of a horizontal high-frequency component and characteristic of a vertical high-frequency component of an image formed by an image signal to be processed. According to the detection result, a CPU (61) acquires the number of bits of the image signal after compressed/encoded and calculates a compression ratio based on the number of bits. By using the calculated compression ratio, an image codec (36) is controlled so that the image signal to be processed is compressed/encoded by only one compression/encoding process. Thus, it is possible to perform compression (compression/encoding) with a high accuracy and at a high speed.
Inventors:
OKADA MIYUKI
KAWANISHI ISAO
HAMA MIKIKO
HARANO TAKESHI
KAWANISHI ISAO
HAMA MIKIKO
HARANO TAKESHI
Application Number:
PCT/JP2005/011878
Publication Date:
December 29, 2005
Filing Date:
June 22, 2005
Export Citation:
Assignee:
SONY CORP (JP)
OKADA MIYUKI
KAWANISHI ISAO
HAMA MIKIKO
HARANO TAKESHI
OKADA MIYUKI
KAWANISHI ISAO
HAMA MIKIKO
HARANO TAKESHI
International Classes:
G06T9/00; H04N1/41; H04N5/907; H04N5/92; H04N19/115; H04N19/126; H04N19/136; H04N19/149; H04N19/196; H04N19/426; H04N19/50; H04N19/503; H04N19/59; H04N19/61; H04N19/625; H04N19/86; H04N19/91; (IPC1-7): H04N7/32
Foreign References:
| JPH04145767A | 1992-05-19 | |||
| JPH03121036A | 1991-05-23 | |||
| JPH07312751A | 1995-11-28 | |||
| JPH02111176A | 1990-04-24 | |||
| EP0687111A2 | 1995-12-13 | |||
| JP2003199019A | 2003-07-11 | |||
| JPH07203428A | 1995-08-04 | |||
| JPH10164579A | 1998-06-19 |
Attorney, Agent or Firm:
Nakamura, Tomoyuki c/o Miyoshi International Patent Office (Toranomon Kotohira Tower 2-8, Toranomon
1-chome, Minato-k, Tokyo 01, JP)
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