N64_JPEG Library Manual
(version Beta-2 : 1997.12.19)
Beta 2 version will be released soon..(will be distributed on BBS)

Table of Contents

1. Introduction

2. Library Functions

2.1 Encode

2.2 Decode

3. Microcode

3.1 The Decompression Microcode

3.1.1 Input Data

3.1.2 Microcode Start-up

3.1.3 Output Data

3.2 The Compression Microcode

3.2.1 Input Data

3.2.2 Microcode Start-up

3.2.3 Output Data

4. Tools

4.1 njpgCompress Tool

4.2 njpgMakeSlide Tool

4.3 rgb2u64 Tool

5. General Reference Material

5.1 N64 JPEG Compression Process

5.1.1 Convert to the YUV Format

5.1.2 Cull less Essential Data

5.1.3 DCT

5.1.4 Quantization

5.1.5 Zigzag Scanning

5.1.6 Entropy Encoding

5.2 Output data formats

5.2.1 Data from njpgMakeSlide Tool

5.2.2 Data from njpgCompress Tool

5.3 Quantization Table

5.4 Huffman Encoding Table

5.5 Programming Cautions

5.5.1 Image Quality

5.5.2 Data Form After Decompression