SDI Audio Intel FPGA IP User Guide

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ID 683333
Date 12/15/2021
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Document Table of Contents
Document Table of Contents x
1. SDI Audio Intel FPGA IP Overview 2. SDI Audio Intel FPGA IP Getting Started 3. SDI Audio Intel FPGA IP Functional Description 4. SDI Audio Intel FPGA IP Parameters 5. SDI Audio Intel FPGA IP Interface Signals 6. SDI Audio Intel FPGA IP Registers 7. SDI Audio Intel FPGA IP User Guide Archives 8. Document Revision History for the SDI Audio Intel FPGA IP User Guide
1. SDI Audio Intel FPGA IP Overview x
1.1. Release Information
2. SDI Audio Intel FPGA IP Getting Started x
2.1. Instantiating the SDI Audio Intel FPGA IP Simulating the Testbench
3. SDI Audio Intel FPGA IP Functional Description x
3.1. SDI Audio Embed IP Core 3.2. SDI Audio Extract IP Core 3.3. SDI Clocked Audio Input IP Core 3.4. SDI Clocked Audio Output IP Core 3.5. AES Format 3.6. Avalon-ST Audio Interface
4. SDI Audio Intel FPGA IP Parameters x
4.1. SDI Audio Embed Parameters 4.2. SDI Audio Extract Parameters 4.3. SDI Audio Clocked Audio Input Parameters 4.4. SDI Audio Clocked Audio Output Parameters
5. SDI Audio Intel FPGA IP Interface Signals x
5.1. SDI Audio Embed Signals 5.2. SDI Audio Extract Signals 5.3. SDI Audio Clocked Input Signals 5.4. SDI Audio Clocked Output Signals 5.5. SDI Audio IP Register Interface Signals
6. SDI Audio Intel FPGA IP Registers x
6.1. SDI Audio Embed Registers 6.2. SDI Audio Extract Registers 6.3. SDI Clocked Audio Input Registers 6.4. SDI Clocked Audio Output Registers
1. SDI Audio Intel FPGA IP Overview
2. SDI Audio Intel FPGA IP Getting Started
3. SDI Audio Intel FPGA IP Functional Description
4. SDI Audio Intel FPGA IP Parameters
5. SDI Audio Intel FPGA IP Interface Signals
6. SDI Audio Intel FPGA IP Registers
7. SDI Audio Intel FPGA IP User Guide Archives
8. Document Revision History for the SDI Audio Intel FPGA IP User Guide

3.5. AES Format

The SDI cores use the AES standard. The Audio Engineering Society (AES), together with the European Broadcasting Union (EBU), created a digital audio transmission standard known as the AES/EBU standard. The AES standard is a digital audio standard for transporting digital audio signals serially between devices.

Using the AES format requires the entire 64-bit AES frame to be sent serially. As the AES defines the preambles as biphase mark codes, which cannot be directly decoded to 4 bits, you must replace the preambles with X = 0000b, Y = 0001b, and Z = 0010b. This internal AES format serializes the bit-parallel data words by sending the least significant bits (LSB) first, with the audio sample (up to 24 bits).

This figure shows the timing diagram of the internal AES format.
Figure 4. Internal AES Format Timing Diagram
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