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ZR36504

Video & Audio Interface solution via USB

Unspecified 

ZORAN Corporation

USBvision II Data Decoder

ZR36505 Data Sheet

ZR36504 - Full Video and Audio Interface solution for Video via USB

The ZR36504 is an ideal solution for digital camera manufacturers who want to utilize the Universal

Serial Bus as an interface between the camera and the computer. Using a proprietary video compression

algorithm, the ZR36504 enables a throughput of up to 30f/s for CIF size images and up to 15f/s for VGA

size images, utilizing only half of total available bandwidth of the USB port. An appropriate software

driver in the host computer de-compresses the incoming USB data, consuming only 25% of CPU time

(@ CIF 30f/s). The resulting digital image quality is almost identical to the source coming from the

camera. This monolithic feature of the ZR36504 makes it ideal to be used as a one chip solution for a

very low cost USB portable Video Camera.

The ZR36504 can also be used to transfer video sequence from a Composite-Video source to the

computer for editing (this requires an additional video decoder chip). Due to the fact that the USB

bandwidth used by the ZR36504 can be adjusted (0.5-7.5 Mbit/sec), the video software application

always has enough time to record the incoming compressed video data on disk and display full frame -

rate on screen simultaneously.

The ZR36504 is compatible with the NT1003-1, but has a smaller package. It supports simultaneous

Serial Digital Audio input and simultaneous external Bulk-Data input as well, and eliminates the need for

an external EEPROM to set a specific manufacturer USB ID code. The ZR36504 also supports 16 Mbit

DRAMs for a better quality VGA video and still capture.

Features

• Up to 30 frames/sec @ CIF size (352x288 pixels)

• Up to 15 frames/sec @ VGA size (640x480 pixels)

• Connects to various YUV sources (4:4:4, 4:2:2, 16 or 8-bit bus)

• Selectable Raw/Compressed video out

• Variable Compression ratio

• Selectable USB bandwidth (0.5Mbps - 7.5Mbps in 0.5Mbps steps):

• Built-in programmable true scaler (Down Scale - horizontal and vertical)

• Built in Zoom and Pan capabilities

• Supports high resolution still image capture (640x480 pixels)

• Supports serial Digital Audio input (8K/16K samp/sec, 8-bit µ-Law / 16-bit linear)

• Auxiliary simultaneous external serial Bulk-data input (0 to 2Mbit/sec).

• Selectable Data/Clock serial protocols - ideal for camera control

• Low power consumption (190mW @ 3.3V) - can use USB power source

• Direct connection to USB port

• Handles device Power Management (complies with USB standard spec.)

• Fits Intel’s MMX® concept

• Supports most popular software applications that require digital video.

• Available in 100-pin PQFP and TQFP packages

November-99

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