Title:
画像信号符号化装置及び画像信号符号化方法
Document Type and Number:
Japanese Patent JP3890606
Kind Code:
B2
Abstract:
Complexity of information of a video signal is detected to control a quantizing step based on the above complexity. Difference of said video signal is quantized with different quantizing steps in response to said control. Generated code lengths of a plurality of resultant quantized outputs are compared with a target code length. A quantization index indicative of a quantizing step is determined based on a result of said comparison. The above video signal is quantized with the quantizing step based on said quantization index. The above quantized output is subjected to a variable length encoding processing. Further, when the quantization index is determined, a value of the target quantization index indicative of a target quantizing step size allowing the target code length to be obtained is searched only between two quantization indexes respectively indicating two quantizing steps which allow two generated code lengths most approximate to a value of the target code length.
Inventors:
Atsuo Yada
Takuya Kitamura
Takuya Kitamura
Application Number:
JP52746496A
Publication Date:
March 07, 2007
Filing Date:
March 11, 1996
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H04N19/126; G06T9/00; H04N19/00; H04N19/134; H04N19/136; H04N19/14; H04N19/176; H04N19/177; H04N19/186; H04N19/196; H04N19/42; H04N19/423; H04N19/503; H04N19/51; H04N19/61; H04N19/625; H04N19/85; H04N19/91
Domestic Patent References:
| JP4323961A | ||||
| JP4091587A | ||||
| JP5236427A | ||||
| JP5168001A | ||||
| JP8016362A | ||||
| JP7075090A | ||||
| JP4352591A | ||||
| JP5111012A | ||||
| JP5217299A | ||||
| JP6113273A | ||||
| JP3252284A |
Attorney, Agent or Firm:
Yoshitsuno Kakuda
Hitoshi Ito
Hitoshi Ito