Title:
ADAPTIVE DPCM CODER
Document Type and Number:
Japanese Patent JPH06217297
Kind Code:
A
Abstract:
PURPOSE: To provide an adaptive type DPCM coder for supplying DPCM signals provided with a minimum bit rate and exerting visible influence on image quality. CONSTITUTION: At least two predictors 5 and 6 for supplying prediction values obtained by different standards, a variable word length coder 8 and a control circuit 9 are provided for quantization as precise as possible. The control circuit operation-connects predetermined quantizers 1, 2, 3 and 4 and predetermined predictors 5 and 6 depending on the full level of a buffer memory 7, present quantizers 1, 2, 3 and 4 and present predictors 5 and 6.
Inventors:
UENYUN TSUAN
TOMU BAATERU
JIYAN BUANJIE
TOMU BAATERU
JIYAN BUANJIE
Application Number:
JP22425393A
Publication Date:
August 05, 1994
Filing Date:
September 09, 1993
Export Citation:
Assignee:
PHILIPS ELECTRONICS NV
International Classes:
H03M7/38; G06T9/00; H04N19/124; H04N19/50; H04N19/503; (IPC1-7): H04N7/137; G06F15/66; H03M7/38
Attorney, Agent or Firm:
Toshio Yano (2 outside)
Previous Patent: A photosensitive resin composition and the coat using it
Next Patent: VISUAL TELEPHONE SET
Next Patent: VISUAL TELEPHONE SET