QVGA/CIF resolution MPEG-4 video codec based on a low-power and general-purpose DSP

Author

Hatabu, Atsushi ; Miyazaki, Takashi ; Kuroda, I.

Author_Institution

Multimedia Res. Labs., NEC Corp., Kawasaki, Japan

fYear

2002

fDate

16-18 Oct. 2002

Firstpage

15

Lastpage

20

Abstract

This paper describes a QVGA/CIF resolution MPEG-4 video codec based on a low-power, general-purpose DSP (NEC μPD77210,160 MHz, 80 mW, 1.5 V). To enhance video codec performance, the codec employs fast algorithms, including, in motion estimation, a successive similarity detection algorithm (SSDA; a fast block matching) whose decision timing for termination of block matching is optimized. Further, the use of a software DMA queue reduces the wasteful DSP wait cycles that can result from massive access to external frame memories. The resulting codec executes QVGA × 15 fps codec, or CIF × 15 fps encoding at 384 kbps, in real time, performance levels sufficient for next-generation wireless videotelephony.

Keywords

data compression; digital signal processing chips; high-speed integrated circuits; image matching; low-power electronics; motion estimation; real-time systems; timing; video codecs; video coding; videotelephony; 1.5 V; 160 MHz; 384 kbit/s; 80 mW; MPEG-4 video codec; NEC μPD77210; QVGA/CIF resolution video codec; codec performance enhancement; fast algorithms; fast block matching; general-purpose DSP; low-power DSP; motion estimation; software DMA queue; successive similarity detection algorithm; wireless videotelephony; Digital signal processing; Energy consumption; Large scale integration; MPEG 4 Standard; Motion estimation; National electric code; Streaming media; Termination of employment; Timing; Video codecs;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Systems, 2002. (SIPS '02). IEEE Workshop on

ISSN

1520-6130

Print_ISBN

0-7803-7587-4

Type

conf

DOI

10.1109/SIPS.2002.1049678

Filename

1049678