Paper Info
Title
QVGA/CIF Resolution MPEG-4 Video Codec Based on a Low-Power and General-Purpose DSP
Abstract
This paper describes a quarter video graphic array/common intermediate format (QVGA/CIF) resolution MPEG-4 video codec based on a low-power, general-purpose digital signal processor (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 direct memory access (DMA) queue reduces the wasteful DSP wait cycles that can result from massive access to external frame memories. The resulting codec executes QVGA (320 × 240 pixels) × 15 fps codec, or CIF (352 × 288 pixels) × 15 fps encoding at 384 kbps, in real time, performance levels sufficient for next-generation wireless videotelephony.
Year
DOI
Venue
2005
10.1023/B:VLSI.0000047268.39953.60
Signal Processing Systems, 2002.
Keywords
DocType
Volume
MPEG-4,DSP,μPD77210,low power,computational cost,motion estimation,successive similarity detection algorithm (SSDA),DMA queue
Journal
39
Issue
ISSN
Citations 
1-2
1520-6130
5
PageRank 
References 
Authors
0.68
5
3
Name
Order
Citations
PageRank
Atsushi Hatabu1333.79
Takashi Miyazaki250.68
Ichiro Kuroda314823.39