Real-time software video codec with a fast adaptive motion vector search

Author

Moriyoshi, Tatsuji ; Shinohara, Hiroshi ; Miyazaki, Takashi ; Kuroda, Ichiro

Author_Institution

C&C Media Res. Labs., NEC Corp., Kawasaki, Japan

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

44

Lastpage

53

Abstract

A PC-based real-time software MPEG-4 video codec with a fast adaptive motion vector search is presented. In a fast adaptive motion estimation (ME) technique, the search order is dynamically changed in accordance with the motion of objects. This technique suppresses load fluctuation in the ME and contributes to the stable real-time work of the codec. MMX instructions are used to increase the codec speed. On a portable PC, the software video codec supports satisfactory mobile visual communication at 64 kbps and 128 kbps, for example, at QCIF 15 fps. The codec on a 450 MHz Pentium II processor can encode and decode 30 CIF frames in real-time

Keywords

motion estimation; real-time systems; video codecs; visual communication; 450 MHz Pentium II processor; MMX instructions; PC-based real-time software MPEG-4 video codec; adaptive motion estimation; fast adaptive motion vector search; load fluctuation; mobile visual communication; real-time software video codec; search order; Acceleration; Decoding; Fluctuations; MPEG 4 Standard; Motion estimation; National electric code; Video codecs; Video compression; Videoconference; Visual communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Systems, 1999. SiPS 99. 1999 IEEE Workshop on

Conference_Location

Taipei

ISSN

1520-6130

Print_ISBN

0-7803-5650-0

Type

conf

DOI

10.1109/SIPS.1999.822309

Filename

822309