Introduction, Hardware configuration – Sensoray 512 QNX User Manual

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3. Introduction

The Sensoray Model 512 is an MPEG video encoder decoder board. Some of the features include:


Real time MPEG-2 and MPEG-1 video encoder and decoder

Support for variable bit rate and constant bit rate

IPB pictures to 15Mbps for constant bit rate and 10Mbps for variable bit rate

Supports multiple resolutions (704x480, 640x480, 352x240, etc.)

Support for NTSC, PAL

Composite and S-Video inputs and outputs

During encoding and standby, video input is fed to output for easy adjustment

Onboard linear 16-bit audio CODEC (uncompressed audio)

PC/104 form factor

Either BNC connectors or header for video input and output

Either mini phone jacks or header for audio input and output

3 digital TTL level digital inputs and/or outputs

Low power

Video encoder

Generates 13818 (MPEG-2) and 11172 (MPEG-1) compliant elementary streams (ES)

Operates up to 30 frames per second

Selectable bit rate

Video decoder

Decodes both MPEG-1 and MPEG-2 streams

Horizontal and vertical scaling

4. Hardware Configuration

The 512 is installed on a PC/104 stack. Four mounting holes are provided, one in each corner, for
mechanical stability. The bus connectors are the large ones as seen on the bottom of figure 1.

The base address of the 512 must be selected using the base address selection jumper, as seen in the
lower left hand corner of figure 1. Address selection will be discussed in a following section.

Video and digital I/O are present on three connectors. The header, J1, has all I/O signals, including S-
Video, composite video and digital. J27, J28 are for composite video only.