Specifications

PF970-05

Image compression and decompression middleware

● JPEG image compression and decompression middleware for

the S1C33 Family

● Monochrome, RGB, YUV image-processing function supported

● PC tools to convert a JPEG compressed image into ROM data

■ FEATURES

•Image middleware for the S1C33 Family is provided in the form of a linkable library in a CD-ROM.

• This middleware conforms to JPEG baseline and is compatible with a great deal of JPEG data.

• Compress and decompress the image of B/W, grayscale, RGB color and YUV color.

• Compression ratios including <YCbCr> 4:4:4, 4:2:2 and 4:1:1 can be selected and reduction-expanded func-

tion can be used.

•

PC tools for creating compressed JPEG image ROM data and evaluating image quality are provided.

• S5U1C330J1S does not use any interrupt or peripheral functions.

• Suitable for applications that capture and display image data such as digital cameras, PDA, digital stationery

and digital toys.

■ MEMORY REQUIREMENTS AND SPEED

• RAM ............................................................36K bytes (for an image 320 pixels wide)

• ROM ............................................................25K bytes

• Compression and decompression speed ....approx. 2 seconds

(20MHz operation, 320 × 240 pixels)

■ SOFTWARE CONFIGURATION

● S5U1C330J1S Library

Library including subroutines that are called from the user's application.

Compression and decompression are possible in an S1C33 chip.

Create and edit a file using

a scanner or a digital

camera

Tools for format conversion

and compression

Image

Bitmap (.bmp) file

Compressed

JPEG data

(assembler source)

● S5U1C330J1S Data Creation Tool

This tool creates compressed JPEG image ROM data for display only.

It can be used with Windows95/98/NT4.0, or higher versions.

EPSON

Scanner, digital camera

Flow in PC (Example)

S1C33 Family S5U1C330J1S Middleware

Application

S5U1C330J1S library

jpegInit(), jpegDecode(), jpegEncode(), ....