Video and Image Processing Suite User Guide

ID 683416
Date 2/12/2021

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2.2.3. Avalon-ST Video User Packets

The Avalon-ST protocol may use the user packet types to transmit any user data, such as frame identification information, audio, or closed caption data.

The Avalon-ST Video protocol only requires for the payload data to begin on the second cycle of transmission (the first cycle must contain the user packet identification nibble). The content or length of these packets are ignored.

Figure 10. Avalon-ST User Packet (Start)The figure below shows the start of an example user packet transmission. If a user packet passes through a VIP IP core which reduces the number of bits per pixel, then data is lost.