SDI Audio Intel® FPGA IP User Guide

ID 683333
Date 6/26/2023
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6.1. SDI Audio Embed Registers

The following tables list the registers for the SDI Audio Embed IP core.
Table 26.  SDI Audio Embed Register Map
Bytes Offset Name
00h Audio Control Register
01h Extended Control Register
02h Video Status Register
03h SD EDP Control Register
04h Channel Status Control Registers (3:0)
05h Channel Status Control Registers (7:4)
06h Strip Control Register1
07h Strip Status Register1
08h Sine Channel 1 Frequency
09h Sine Channel 2 Frequency
0Ah Sine Channel 3 Frequency
0Bh Sine Channel 4 Frequency
0Ch Audio Status Register
0Dh-0Fh Reserved
10h-3Fh Channel Status RAM (0×00), (0×01), ... (0×2F)
Table 27.  SDI Audio Embed Registers
Bit Name Access Description
Audio Control Register
7:0 Audio group enable RW

Enables the embedding of each audio group. When working with HD-SDI or 3G-SDI video, this register also enables the embedding of the audio control packet when one or more audio groups are enabled.

The following bits correspond to the number of audio groups you specify:

  • Bit [1:0] = Audio group 1
  • Bit [3:2] = Audio group 2
  • Bit [5:4] = Audio group 3
  • Bit [7:6] = Audio group 4
Extended Control Register
2:0 Channel status RAM select RW When you specify the Channel Status RAM parameter to 2, this field selects the channel pair for the RAM written to by registers 10h to 3Fh. If you specify the Channel Status RAM parameter to 0 or 1, ignore this signal.
3 Unused Reserved for future use.
4 Test sine generator enable RW When set to 1b, this bit ignores the audio inputs and uses the output of the sine generator as the data for each audio group.
6:5 Link AB Control RW

This register applies only for 3G-SDI Level B standard.

Controls which link the ancillary data is embedded in.

  • 00b = No data is embedded
  • 01b = Data is embedded only in Link B.
  • 10b = Data is embedded only in Link A (default value).
  • 11b = Data is embedded in Link A and Link B at the same time.

When set to 11b, the IP core inserts new packets after any existing ancillary data on Link A and in the identical location on Link B.

If the packet distribution of existing ancillary data on Link B differs, existing packets may be corrupted. In these circumstances, Intel recommends you use two separate instances of the ancillary embedder.

7

Unused

Reserved for future use.
Video Status Register
7:0 Active channel RO

Reports the detected video input standard.

  • Bits[7:5] = Picture structure code. Defined values for picture structure code are:
    • 001b = 486 or 576 line SD-SDI
    • 100b = 720 line HD-SDI
    • 101b = 1080 line HD-SDI
    • 010b = 1080 line 3G-SDI
    • 011b = 1080 line 3GA-SDI
    • 110b = 720 line 3GA-SDI
    • 111b = 720 line 3GB-SDI
  • Bit[4] = 0b—Interlace or segmented frame, 1b—Progressive.
  • Bits[3:0] = Frame rate code. Defined values for frame rate code (in Hz) are:
    • 0010b = 23.97
    • 0011b = 24
    • 0101b = 25
    • 0110b = 29.97
    • 0111b = 30
    • 1001b = 50
    • 1010b = 59.94
    • 1011b = 60
SD EDP Control Register
3:0 Enable SD EDP RW Enables the embedding of SD-SDI Extended Data Packets (EDP) for each audio group.
7:4 Enable SD ACP RW Enables the embedding of SD-SDI Audio Control Packets (ACP) for each audio group.
Channel Status Control Register
7:0 CS mode select RW

When set to 00b, the core keeps the existing channel status data.

When set to 01b, the core replaces the channel status data with these default values:

  • Channel status byte 0: 0x8
  • Channel status byte 1: 0x02
  • Channel status byte 2–22: 0x00
  • Channel status byte 23: 0xDD

When set to 10b, the core replaces the data with the contents of the appropriate channel status RAM.

The following bits correspond to the number of audio groups you specify:

  • Bit [1:0] = Audio group 1
  • Bit [3:2] = Audio group 2
  • Bit [5:4] = Audio group 3
  • Bit [7:6] = Audio group 4
Strip Control Register
3:0 Strip enable RW Enables the removal of both ACP and ADP (and any SD-SDI EDP) for each of the four audio groups.
7:4 Unused Reserved for future use.
Strip Status Register
3:0 Data packet present

RO

3:0

Reports which audio data groups are detected in the SDI stream.

When in 3G-SDI Level B mode, this register reports the presence of audio on Link A (Link B should be a duplicate).

7:4 Control packet present RO

Reports which audio control groups are detected in the SDI stream.

When in 3G-SDI Level B mode, this register reports the presence of audio on Link A (Link B should be a duplicate).

Sine Channel n Frequency
7:0 Sine channel frequency RW Defines the frequency of the generated audio.
Audio Status Register
4 Frame lock RO Reports whether the video frame with the embedded audio is locked.
Channel Status RAM
7:0 Channel status data WO Write accesses within the address range 10h to 3Fh to the channel status RAM. This field returns the 24 bytes of channel status for X channels starting at address 10h to 27h, and the 24 bytes of channel status for Y channels starting at address 28h to 3Fh.
1 The Intel® Quartus® Prime Pro Edition software SDI Audio Intel® FPGA IP does not support strip control and strip status.