HDMI Intel® FPGA IP User Guide

ID 683798
Date 11/12/2021
Public

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5.1.7. Source Auxiliary Control Port

To simplify the user logic, the source core has control ports to send the most common auxiliary control packets.

These packets are: General Control Packet, Auxiliary Video Information (AVI) InfoFrame, and HDMI Vendor Specific InfoFrame (VSI).

The core sends the default values in the auxiliary packets. The default values allow the core to send video data compatible with the HDMI 1.4b Specification with minimum description.

You can also override the generators using the customized input values. The override values replace the default values when the input checksum is non-zero.

Table 21.  Insertion and Filtration
Auxiliary Packets Insertion/Filtration Frequency of Insertion
General Control Packet (GCP)

The core always inserts GCP packets from the GCP sideband upon the rising edge of vsync.

The core always removes the GCP in the Auxiliary Data Port.

You must provide the pixel packing and color depth information through the gcp port.

Once per frame.
Auxiliary Video Information (AVI) InfoFrame info_avi[112]=1'b0

The core inserts info_avi when there is a non-zero bit upon the rising edge of vsync.

The core send default values when all bits are zero. The core filters the AVI InfoFrame packet on the Auxiliary Data Port.

Once per frame.

Support FRL=0: info_avi[112] =1'b1

Support FRL =1: info_avi[122]=1'b1

The core does not insert info_avi.

The AVI InfoFrame packet on the Auxiliary Data Port passes through.

Vendor Specific InfoFrame (VSI) info_vsi[61]=1'b0

The core inserts info_vsi[60:0] when there is a non-zero bit upon the rising edge of vsync.

The core sends default values when all bits are zero. The core filters the VSI InfoFrame packet on the Auxiliary Data Port.

Once per frame.
info_vsi[61]=1'b1

The core does not insert info_vsi[60:0].

The VSI InfoFrame packet on the Auxiliary Data Port passes through.

Audio Metadata (AM) audio_metadata[165]=1'b0

The core inserts audio_metadata[164:0] when audio_format[3:0] is 3D audio or MST audio upon the rising edge of vsync.

The core filters the AM packet on the Auxiliary Data Port.

Once per frame.
audio_metadata[165]=1'b1

The core does not insert audio_metadata[164:0].

The AM packet on the Auxiliary Data Port passes through.

Audio InfoFrame (AI) audio_info_ai[48]=1'b0

The core inserts audio_info_ai[47:0] when there is a non-zero bit upon the rising edge of vsync.

The core sends default values when all bits are zero. The core filters the AI packet on the Auxiliary Data Port.

Once per frame.
audio_info_ai[48]=1'b1

The core does not insert audio_info_ai[47:0].

The AI packet on the Auxiliary Data Port passes through.

Audio Control Regeneration (ACR)

The core always inserts the audio_N and audio_CTS.

The core does not filter the ACR packet in the auxiliary. If there is ACR packet in the Auxiliary Data Port, you must remove it before passing into the Auxiliary Data Port.

Every 1 ms.
Audio Sample

The core always inserts audio_data.

The core does not filter the audio sample packet in the Auxiliary Data Port. If there is audio sample packet in the Auxiliary Data Port, you must remove it before passing into the Auxiliary Data Port.

Based on audio sample rate.

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