[ZORAN Corporation]

GENERAL DESCRIPTION

The ZR36050 is a high-speed JPEG Image Compression Processor that performs the algorithm specified by the JPEG Baseline and JPEG Lossless standards for high-quality image compression and expansion of continuous-tone color or monochrome images. The ZR36050 performs Discrete Cosine Transform (DCT), quantization and variable-length encoding for image compression (coding), and the corresponding inverse operations for expansion (decoding).

FEATURES

■ Implements JPEG Baseline image compression and expansion, including:

- DCT/IDCT operations

- Quantization

- Variable length coding/decoding

■ Full support of the JPEG Baseline standard, including:

- Bit and byte stuffing

- JPEG markers including restart (RST), application (APP), and comment (COM)

■ JPEG Lossless compression and expansion

■ DMA/SLAVE bus interface

■ Motion video (30 frames/sec) compression/expansion capability for CCIR resolution (720 x 480)

■ “Fast Preview” option

- Preview of “thumbnail” version of images (up to 25x faster)

■ Bit rate control option

- Guarantees compressed image file size

■ Low cost solution

- Low cost single chip

- Support for inexpensive memories

- Requires minimal host intervention

■ TTL compatible

■ 27 and 21 MSamples/sec data-rate

■ Standby mode for very low power consumption

■ 100-pin plastic quad flat-pack (PQFP) packaging

APPLICATIONS

■ Computer and multimedia add-in boards

■ Full-motion video compression/expansion

■ Digital still cameras and peripherals

■ Security and industrial systems

■ Videophones and color FAX machines

■ Color printers and scanners

■ Fixed bit rate image transmission devices

■ Cost-sensitive image compression systems