AN2121 Freescale Semiconductor / Motorola, AN2121 Datasheet - Page 5

• Manufacturer Part Number: AN2121
• Description: JPEG2000 Arithmetic Encoding on StarCore SC140
• Manufacturer: Freescale Semiconductor / Motorola

Freescale Semiconductor, Inc.
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Introduction
This application note is the second in a series of notes that describe how the advanced features of the
StarCore processor can be used to implement the algorithms associated with the image compression
standard JPEG2000. The first application note in this series [1] which described the wavelet transform
included a brief overview of the JPEG2000 standard. In this application note, arithmetic coding is
explained in conjunction with the specific arithmetic encoder used in the JPEG2000 standard. StarCore
implementation in both C code and optimized assembler are also provided.
Although the StarCore processor is a general-purpose DSP, it has many features that make it possible to
perform image compression algorithms quickly and efficiently. The performance of StarCore in processing
the JPEG2000 arithmetic encoder is discussed with results of performance tests being provided. Although
the arithmetic encoder is primarily a sequential engine, it is shown that some of StarCore’s parallel features
can still be used to good effect.
Introduction
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