Title:
複雑さの軽減された復号化に適したシングルレイヤビデオ符号化されたビットストリームを供給するシステム及び方法
Document Type and Number:
Japanese Patent JP4393875
Kind Code:
B2
Abstract:
A method and system of reducing the computation load of an MPEG decoder by changing the encoding algorithms in a video-processing system are provided. During an encoding mode, a stream of data blocks is received and at least one motion vector and one motion compensation prediction value for each macro-block are generated. The prediction value is transformed into a set of DCT coefficients. Prior to the quantizing step, the set of DCT coefficients are modified according to predetermined criteria. To this end, the total energy level of the DCT coefficients excluding the lowest 2x2 DCT coefficients is computed, and last column and last row of the DCT coefficients is discarded alternatively until the total energy level of the DCT coefficients reaches a predetermined energy level. Therafter, the discarded column or row is assigned to a predetermined value. The modified DCT coefficients are then quantized and encoded, thereby generating a bit stream of encoded macro-blocks, which are subsequently decoded according to a conventional decoding process.
Inventors:
Tson Tsun
Hong Hoon
Hong Hoon
Application Number:
JP2003587114A
Publication Date:
January 06, 2010
Filing Date:
April 15, 2003
Export Citation:
Assignee:
IPG Electronics 503 Limited
International Classes:
H04N7/30; H04N7/12; H04N7/26; H04N7/32; H04N7/50
Domestic Patent References:
| JP563990A |
Attorney, Agent or Firm:
Kenji Sugimura
British tribute
British tribute