Title:
VIDEO DATA DIVIDER
Document Type and Number:
Japanese Patent JP3646844
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the video data divider that keeps an information quantity of a data series after layer separation almost constant.
SOLUTION: A 1st zigzag scan coder 11 obtains a total information amount (c) produced in frames and provides an output of it to a parameter decision device 12. The parameter decision device 12 takes difference between an object information amount ((n+1)B) and a preceding produced information amount (Σbi) of high order coefficients to obtain high frequency component generating information amount (yn) of the frame and to obtain a division point (xm) for low and high frequency components by using the total information amount (c) as a parameter so that at least one of the data amount of the low frequency component and the high frequency component after division is the high frequency component generating information amount (yn). A 2nd zigzag scanning coder 13 divides the data at the division point (xn) into the low and high frequency components, and they are respectively fed to a base layer packet processing unit 14 and an expanded layer packet processing unit 15.
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Inventors:
Shigeyuki Sakazawa
Yasuhiro Takishima
Masahiro Wada
Yasuhiro Takishima
Masahiro Wada
Application Number:
JP6785898A
Publication Date:
May 11, 2005
Filing Date:
March 03, 1998
Export Citation:
Assignee:
KDDI CORPORATION
International Classes:
H04N19/60; H04N19/115; H04N19/132; H04N19/134; H04N19/172; H04N19/196; H04N19/423; H04N19/46; H04N19/503; H04N19/61; H04N19/625; H04N19/70; H04N19/91; (IPC1-7): H04N7/30
Domestic Patent References:
| JP2062175A | ||||
| JP3102988A | ||||
| JP4357787A | ||||
| JP5056420A |
Attorney, Agent or Firm:
Kaori Tanaka
Michito Hiraki
Michito Hiraki