Title:
符号化ビットレート制御方法及び装置、そのプログラム並びにプログラムを記録した記録媒体
Document Type and Number:
Japanese Patent JP5008718
Kind Code:
B2
Abstract:
An encoding bit-rate control method used in video encoding in which intraframe prediction and interframe prediction are switchably used. The method includes measuring an amount of code generated for quantized information and an amount of code generated for non-quantized information for the picture which has been encoded; computing a ratio of the amount of code generated for the non-quantized information to the total amount of generated code, based on the above measured amounts of code; and determining a target amount of code of an encoding target picture by using the computed ratio of the amount of code generated for the non-quantized information. The target amount of code may be determined by computing a complex index for the quantized information of the picture which has been encoded, and estimating an amount of code generated when the encoding target picture is encoded using a predetermined assumed quantization step size, based on the above index and the ratio of the amount of code generated for the non-quantized information.
Inventors:
Jun Shimizu
Ryuichi Yata
Ryuichi Yata
Application Number:
JP2009503993A
Publication Date:
August 22, 2012
Filing Date:
March 05, 2008
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04N19/50; H04N19/126; H04N19/136; H04N19/14; H04N19/147; H04N19/15; H04N19/176; H04N19/196; H04N19/423; H04N19/503; H04N19/51; H04N19/593; H04N19/60; H04N19/61; H04N19/91
Domestic Patent References:
| JPH07264579A | 1995-10-13 | |||
| JPH11252572A | 1999-09-17 | |||
| JP2000023162A | 2000-01-21 | |||
| JP2002010260A | 2002-01-11 | |||
| JP2005318468A | 2005-11-10 | |||
| JP2006005466A | 2006-01-05 | |||
| JP2006506032A | 2006-02-16 | |||
| JPH0998427A | 1997-04-08 |
Attorney, Agent or Firm:
Masatake Shiga
Yasuhiko Murayama
Yasuhiko Murayama