Title:
ENCODER, ENCODING METHOD AND ENCODING PROGRAM STORAGE MEDIUM
Document Type and Number:
Japanese Patent JP3691180
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress fluctuations in image quality for each display screen and to effectively utilize a storage capacity by turning input data to the divided data of plural bands, turning them to quantified data by quantizing then and them outputting them as encoded data.
SOLUTION: This encoder s wavelet converts, quantizes and encodes the input data DG for one frame portion, converts them to a data format by a frame unit, outputs them as encoded frame data DFL and stored them in a memory 3. A decoder 4 reads, inversely formats, encodes, inversely quantizes and inversely wavelet-converts them and outputs them as reproducing data DPG. The reproduced data DPG are D/A converted, turned into image signals and outputted to a display, and decoded images are displayed on a screen. Constitution is performed so as to minimize an average but rate under the condition that weighted mean square distortion is fixed, a large code amount is allocated to a complicated screen, a small code amount is allocated to a simple screen, so that waste of the coding amount is suppressed, and the video images of the stable screen are obtained.
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Inventors:
Mitsuya Komamura
Application Number:
JP32436396A
Publication Date:
August 31, 2005
Filing Date:
December 04, 1996
Export Citation:
Assignee:
Pioneer Corporation
International Classes:
H04N19/60; H03M7/38; H04N19/126; H04N19/136; H04N19/147; H04N19/169; H04N19/18; H04N19/186; H04N19/189; H04N19/19; H04N19/196; H04N19/423; H04N19/59; H04N19/625; H04N19/635; H04N19/70; H04N19/80; H04N19/85; H04N19/91; H04N19/93; (IPC1-7): H04N7/30
Other References:
Kai-Kuang Ma, Rjala,S.A.,Generalized optimum dynamic bit allocation scheme for Source Compression,IEEE Proc of Int.Conf. on Image Processing,1994年11月13日,Vol.2,P.864-868
Attorney, Agent or Firm:
Hideo Takino
Yasuo Nakauchi
Yasuo Nakauchi