Title:
DATA CONVERTING DEVICE AND METHOD AND RECORDED MEDIUM
Document Type and Number:
WIPO Patent Application WO/2000/018132
Kind Code:
A1
Abstract:
An image contracting circuit (1) contracts a supplied original image. An upper-level image memory (2) holds an inputted upper-level image. A prediction tap extracting circuit (3) extracts a prediction tap from the upper-level image stored in the upper-level image memory (2) and outputs it to a mapping circuit (4), prediction coefficient creating circuit (5), and pixel value updating circuit (8). The mapping circuit (4) outputs a predicted image formed by performing calculation of a linear combination of the prediction tap and the prediction coefficient to an error calculating circuit (6). The error calculating circuit (6) calculates the difference (S/N ratio) between the pixel value of the predicted image and the corresponding pixel value of the original image. A comparing/judging circuit (7) controls a nonlinear processing circuit (9) according to the difference. The nonlinear processing circuit (9) adds a predetermined value to the pixel value of the pixel of the updated upper-level image or subtracts a predetermined value from the pixel value depending on the variation of the pixel value updated by a pixel value updating circuit (8).
Inventors:
KONDO TETSUJIRO (JP)
TAKAHASHI KENJI (JP)
KOBAYASHI NAOKI (JP)
WATANABE YOSHINORI (JP)
TAKAHASHI KENJI (JP)
KOBAYASHI NAOKI (JP)
WATANABE YOSHINORI (JP)
Application Number:
PCT/JP1999/005084
Publication Date:
March 30, 2000
Filing Date:
September 17, 1999
Export Citation:
Assignee:
SONY CORP (JP)
KONDO TETSUJIRO (JP)
TAKAHASHI KENJI (JP)
KOBAYASHI NAOKI (JP)
WATANABE YOSHINORI (JP)
KONDO TETSUJIRO (JP)
TAKAHASHI KENJI (JP)
KOBAYASHI NAOKI (JP)
WATANABE YOSHINORI (JP)
International Classes:
G06T3/40; H04N1/41; H04N7/015; H04N7/12; H04N19/105; H04N19/50; H04N19/132; H04N19/136; H04N19/137; H04N19/196; H04N19/423; H04N19/46; H04N19/59; H04N19/70; H04N19/85; (IPC1-7): H04N7/32; H04N1/41; H04N7/015; G06T3/40
Foreign References:
| JPH10191353A | 1998-07-21 | |||
| JPH0846934A | 1996-02-16 | |||
| JPH0856335A | 1996-02-27 | |||
| JPH10243405A | 1998-09-11 |
Other References:
See also references of EP 1033884A4
Attorney, Agent or Firm:
Sugiura, Masatomo (Higashi Ikebukuro 1-chome Toshima-ku Tokyo, JP)
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