ZR36057

The ZR36057 is a PCI adapter intended for multimedia applications on PCI systems. It supports high rate code (compressed data stream) transfer between the system memory and JPEG or MPEG processors. Simultaneously to the code transfer, the ZR36057 captures digital video, such as decompressed MJPEG (Motion JPEG), MPEG, or the output of a video digitizer/ decoder, and creates a scaled video window in the graphics display memory.

The ZR36057 provides the host software with full control over a large number of non-PCI multimedia devices such as: ZR36050, ZR36016 (Zoran Motion JPEG Codec chip set), audio codecs, ZR36100/ZR36110 (Zoran MPEG decoders), etc, as well as any number of I2C devices, such us video digitizers, video encoders, etc.

The ZR36057 interfaces directly to the PCI bus. As a bus master, it transfers data (e.g, MPEG or JPEG code) to or from the system memory, and writes digital video pixels to the graphics display memory. As a bus target, the ZR36057 reflects the host accesses onto a microcontroller-type 8-bit "Guest Bus".

The ZR36057 has a special "Still Transfer" port by means of which the host software writes (or reads) digitized video, as RGB pixels, from the system memory to (or from) the video bus. This path enables fast transfer of still images to be compressed (or decompressed) by the JPEG chip set.