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Mapping and optimizing a software-only real-time mpge-2 video encoder on vliw architectures Lee, Henry
Abstract
MAPPING AND OPTIMIZING A SOFTWARE-ONLY REAL-TIME Due to its high computational demand, MPEG-2 video coding solutions have been based mainly on custom hardware (ASIC) systems. Such systems lack the flexibility and adaptability of software-based solutions. Achieving real-time MPEG-2 video encoding in software remains to be a major challenge. A typical MPEG-2 encoder performs 20 to 30 GOPS (giga operations per second), which exceeds the capabilities of the most advanced contemporary processors. In this thesis, we have developed and tested a highly optimized, low complexity, highquality MPEG-2 video encoder software based on Texas Instruments' fixed-point TMS320C6201 VLiW (Very Long Instruction Word) processor. First, we developed MPEG-2 video encoder software written in C for the C62x processor platform, however, due to the difference in the processor architecture, optimization and modification are done on the software to ensure the MPEG-2 video encoder runs efficiently in the VLIW architecture. The optimization are done at the assembly language level to maximize the attainable instruction-level parallelism (ILP) of the C62x VLIW architecture. In our experience, optimizations done alone by the optimizing Ccompiler of the C62x could not meet the real-time requirements of MPEG-2. After code remapping and optimization, the resulting MPEG-2 video encoder implementation runs approximately 32 times faster than the original unoptimized MPEG-2 video encoder. Moreover, the current version of the encoder can handle SIF(320x240) video format at 16 frames per second with both I and P pictures, and CCIR-601 (720x480) at 15 frames per second for the I pictures only. Our real-time MPEG-2 encoder has been implemented and tested on the C62x Evaluation Model (EVM) board from TI.
Item Metadata
Title |
Mapping and optimizing a software-only real-time mpge-2 video encoder on vliw architectures
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2000
|
Description |
MAPPING AND OPTIMIZING A SOFTWARE-ONLY REAL-TIME Due to its high computational demand, MPEG-2 video coding solutions have been based
mainly on custom hardware (ASIC) systems. Such systems lack the flexibility and adaptability of
software-based solutions. Achieving real-time MPEG-2 video encoding in software remains to
be a major challenge. A typical MPEG-2 encoder performs 20 to 30 GOPS (giga operations per
second), which exceeds the capabilities of the most advanced contemporary processors.
In this thesis, we have developed and tested a highly optimized, low complexity, highquality
MPEG-2 video encoder software based on Texas Instruments' fixed-point TMS320C6201
VLiW (Very Long Instruction Word) processor. First, we developed MPEG-2 video encoder
software written in C for the C62x processor platform, however, due to the difference in the
processor architecture, optimization and modification are done on the software to ensure the
MPEG-2 video encoder runs efficiently in the VLIW architecture. The optimization are done at
the assembly language level to maximize the attainable instruction-level parallelism (ILP) of the
C62x VLIW architecture. In our experience, optimizations done alone by the optimizing Ccompiler
of the C62x could not meet the real-time requirements of MPEG-2. After code remapping
and optimization, the resulting MPEG-2 video encoder implementation runs
approximately 32 times faster than the original unoptimized MPEG-2 video encoder. Moreover,
the current version of the encoder can handle SIF(320x240) video format at 16 frames per second
with both I and P pictures, and CCIR-601 (720x480) at 15 frames per second for the I pictures
only. Our real-time MPEG-2 encoder has been implemented and tested on the C62x Evaluation
Model (EVM) board from TI.
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Extent |
4562148 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-07-06
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0064820
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2000-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.